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Volume 24 Issue 2 July 2006

The second at lower left has a mid exposue time of 2006-04-27 at 22hr 42min 34sec UT.

These being taken as 20 second exposures using a 25cm LX200 S.C. F5.5 at prime focus with a SX-MX916-usb CCD camera.

The third at top right was timed at 2006-05-01 with a mid exposure of 21hr 34min 50sec UT.

The equipment and exposure times being identical with the first two images.

This the which broke up into several pieces as reported in the previous issue of Mercury.

COMET P/SCHWASSMANN-WACHMANN (73P)

he above images of comet P/ Schwassmann-Wachmann (73P) were Ttaken by John Fletcher from his observatory in Tuffley. The first, top left was timed at 2006-04-27 mid exposure time 22hr 39min 32 sec UT.

Mercury, July 2006, Volume 24 Issue 2 Page 1 DATES FOR YOUR DIARY the morning sky. By Tony Ireland WEDNESDAY JULY 12th T An interesting line up of ’s Moons this evening. Ganymede is to the East. Nearer the planet Io and ell, we are back !! Our Skipton property was sold Europa are close whilst normally distant Callisto is mid June and, for the time being we are in Hilary’s W closest to Jupiter. A real traffic jam in line of sight ! flat, almost opposite Christ Church in the centre of Cheltenham, where the church clock does strike three – and all the other hours as well – but there is not much view of the sky at THURSDAY JULY 20th night, thanks to all the trees and bushes. Another opportunity to watch the eternal dance of Jupiter’s Moons. Tonight they are grouped three West, The new house near St. James’ Primary School in The Park one East .Io will be very close to Callisto with Europa is slowly coming along. Yours truly eyes the wide open further out, whilst Ganymede is out to the East. South to North Western sky at the back of this with anticipation, though the Boss has intimated that she requires the ‘observatory’ (!) to be invisible from the house SATURDAY JULY 22 nd B T !! I shall try to oblige. Maybe the BBC has the Tonight will be very close to Regulus in line of odd Tardis hanging around a storeroom it is willing to sell sight. Mars will be at Mag 1.8, just about the dimmest it at a reasonable price …….. can get, whilst Regulus will be brighter at Mag 1.4 to the SSW of Mars. Closest approach will separate them by I hope to attend as many meetings as possible in the future 0.64 degrees at sunset. to renew old friendships and make new ones. Certainly I have been very impressed with all the activities going on THURSDAY JULY 27th T and the diversity of the talks. But we can do more. How For some this is the biggest event of the year !! Before about a Childrens’ Day to encourage youngsters to look at sunset The Moon, just 63.5 hours old, will occult Mars at the sky ? Can it be linked to our own celebrations of 18.52 , 30 degrees above the Western horizon. The planet reaching 25 years later this year ? Are we going to try and will reappear on the bright side of the Moon (!) at 19.44 publicise ourselves for this milestone ? Will there be a when it will be 22 degrees above the horizon. Obviously special dinner with a guest speaker ? Over to you this will be best seen in a large telescope. I hardly imaging …………. binoculars will suffice. Mars will be just 4” across.

Meantime in this coming two months we have an occultation of Mars by the Moon and a Lunar eclipse to look AUGUST forward to. So read on and note your diaries accordingly…. TUESDAY AUGUST 1st T As usual events have been annotated with T, B and P to With only Jupiter worth watching in the evening sky you indicate if they are best observed through a telescope, will have to confine your telescopic viewing to its four binoculars or a it’s a photo opportunity. brightest Moons. Tonight they are arranged three East, one West with Io maybe invisible, Europa and JULY 9th to SEPTEMBER 9th Ganymede to the East and Callisto to the West.

It’s goodbye to Saturn and Mars as they get closer the Sun, FRIDAY AUGUST 4th T though, whilst Saturn disappears behind the Sun on The Moon occults Star ZC 2383 Mag 2.9 PA 149 at 21..07 August 7th , it takes Mars until October 23rd before it dark side. The Star will emerge from the bright side PA finally does the same. The reason is that our speed vis a 233 at 22.00 BST. vis Mars is such that we maintain parity each ‘side ‘ of the Sun (imaging being in a car travelling in a circle one way Normally I avoid listing events in the morning sky but with a lamp post coming between you and Mars, which is this month I have to mention the line ups of Mercury, travelling in the same direction as you round the circle but Saturn and Venus before sunrise with the added on the other side, much further away from the lamp post. attraction of M44 still in the background. Trouble is that Your movement going to the right of the lamp post is you will need a clear North Eastern horizon, an alarm cancelled out by Mars travelling to the left. clock to wake you up at around 4.30 am (!), and a determination not to turn over and go back to sleep when Jupiter is still well placed for observation. it goes off ! The best week will be the week of August 20th to 27th . Uranus is at opposition on September 5th shining at Mag 5.7. Its tiny blue disc 3.7” across, smaller than Mars (!), will On Tuesday August 22nd wide field binoculars will be at RA 22 57 18 Dec - 7.33. Goto telescopes should be show you a view of Venus, the Moon, Saturn and able to put it in your vision. Good luck ! Mercury in a circle of 7.5 degrees.. from above the horizon. The Beehive Cluster will be higher above Venus. Late in August there is an interesting line up of planets in

Mercury, July 2006, Volume 24 Issue 2 Page 2 SEPTEMBER Alan Alan W. Harris THURSDAY SEPTEMBER 7th B P Senior Research Scientist A Partial Eclipse of the Moon tonight. As the Moon Space Science Institute comes up just before just before 8 pm (BST) it will 4603 Orange Knoll Ave. Phone: 818-790-8291 already be in its maximum phase with just a tiny , less La Canada, CA 91011-3364 email: than 1/5th part of the Southern area in darkness. A [email protected] strange sight, worth a photo if you can find an interesting ………………….. horizon. By 20.37 it will be all over. You will need a clear John. very low Eastern horizon to make the best of this. I keep a list of ‘Damocloids’ (a term suggested by Akimasa Nakamura) here: DISCUSSION ON CUBEWANO OBJECT IN KUIPER BELT ftp://ftp.lowell.edu/pub/bas/damocloid th From John Fletcher (17 May) 2002 RP120, which I was pleased to discover one morning, is the latest addition to the group. Hi Roger. For anyone’s interest in the society. Here is a table of ‘Oort cloud ’, or ‘Damocloid’ objects, first built by Akimasa Nakamura , and added to by me afterwards. Iarcs between 2001 and 2003 on object 2002 RP120. version: 10 Sep 2002 It is STILL listed as a Cubewano: Scattered Disc object: Kuiper belt object in various places. Below the letters I Name H a e i q P got back is today’s data from Guide8 and MPCorb.Dat (5335) Damocles 13.3 11.82 0.87 61.9 1.58 40.6 and below that of my observational times. I note it has a 1996 PW 14.0 323.0 0.99 29.8 2.54 5805 period of 416.24 years. 1997 MD10 16.0 26.96 0.94 59.1 1.54 140 1998 QJ1 16.7 11.44 0.82 23.4 2.11 38.7 At the time of my observations when it was just a bit 1998 WU24 15.0 15.18 0.91 42.6 1.41 59.1 fainter than 15v it was only 1.49-AU from home planet. (20461) 1999 LD31 13.8 24.42 0.90 160.2 2.38 121 * Surely this makes it a comet that perhaps has lost all its gas? * 1999 LE31 12.4 8.16 0.47 151.9 4.31 23.4 (15504) 1999 RG33 12.1 9.51 0.77 35.0 2.15 29.3 Reply from Alan Harris. 1999 TD10 8.8 101.4 0.88 6.0 12.30 1020 2002P120 1999 XS35 17.3 18.06 0.95 19.5 0.95 76.7 Epoch 2002 Sept. 3.0 TT = JDT 2452520.5 MPC 2000 AB229 14.0 52.05 0.96 68.7 2.29 401 M 359.90174 (2000.0) P Q 2000 DG8 12.8 10.75 0.79 129.3 2.19 32.5 n 0.00300896 Peri. 357.66149 +0.76206389 2000 HE46 14.6 21.99 0.89 158.4 2.35 108 +0.33793560 2001 QF6 14.8 7.99 0.72 25.4 2.24 22.6 a 47.5180356 Node 39.17519 +0.60736011 2002 CE10 12.9 8.58 0.78 144.5 1.88 25.1 -0.66873802 2002 RP120 12.4 47.52 0.95 119.0 2.47 328 e 0.9479416 Incl. 119.03198 +0.22443779 Brian Skiff +0.66226051 …………………….. P 328 H 12.4 G 0.15 Best wishes from John. Definitely it is a high-e object, that is irrefutable. I’d call it a “Halley family ”. It is very unlikely that it TODAYS MPCORB DATA has evolved from the Kuiper Belt, scattered disk, Cubewano or otherwise. Because of its high inclination, (65407) 2002 RP120 mag 22.9 it is most likely evolved inward from the Oort cloud, just Period of orbit 416.24 years (152030.4 days) as other long period and Halley family are Perihelion distance 2.47 AU believed to be. Only difference is, no one sees any Aphelion distance 109.02 AU cometary activity. As I have mentioned several times on Orbital elements: this list, we expect some fraction of the Oort Cloud Semimajor axis 55.7469782 AU population to have been originally ejected by Jupiter Eccentricity 0.9556560 from inside its orbit, thus “Oort Cloud asteroids.” The Inclination of orbit 119.1091000 degrees surveys have found a small handful of them by now. Argument of perihelion 357.9859000 degrees 2002 VQ94 is probably the latest addition to the group, Long. ascending node 39.2053000 degrees with an even more extreme eccentricity and semi-major Mean anomaly 2.0043000 degrees axis, although more modest inclination.

Cheers,

Mercury, July 2006, Volume 24 Issue 2 Page 3 Kuiper belt asteroid Declination: +21 46’ 17.84” Epoch of elements JD 2453400.5 (30 Jan 2005 0:00) Mean position at current epoch: Right ascension: 17h36m04.784s Right ascension: 02h11m14.528s Declination: +26 32’ 27.85” Declination: +21 47’ 05.38” Mean position at current epoch: Apparent position at current epoch: Right ascension: 17h36m19.993s Right ascension: 02h11m14.686s Declination: +26 32’ 14.75” Declination: +21 47’ 08.14” Dist from home planet: 1.49598702 AU (223,796,473 km) Apparent position at current epoch: Heliocentric position: lon 36.49627 lat 4.85191 Right ascension: 17h36m20.868s Heliocentric radius 2.48262 AU Declination: +26 31’ 52.79” 99.91% illuminated Dist from home planet: 10.31198611 AU (1,542,651,165 km) Phase angle: 3.52 degrees Heliocentric position: lon 255.80131 lat 46.95560 Elongation from Sun 171.17 degrees (morning sky) Heliocentric radius 10.77856 AU Speed of apparent motion: 2.698’/hour at position angle 99.82% illuminated 278.5 Phase angle: 4.84 degrees Motion is 1.07 degrees/day in RA, 0.16 degrees/day in Elongation from Sun 115.20 degrees (morning sky) dec Speed of apparent motion: 13.454”/hour at position Assumed asteroid diameter 22.9 km angle 300.4 Motion is 0.08 degrees/day in RA, 0.05 degrees/day in dec Comments from the MPCORB database: Assumed asteroid diameter 22.9 km Designation: (65407)2002 RP120 Absolute magnitude: 12.3 Comments from the MPCORB database: Slope parameter: 0.15 Designation: (65407)2002 RP120 Orbital elements: Absolute magnitude: 12.3 Semimajor axis: 55.2024646 Slope parameter: 0.15 Eccentricity: 0.9552661 Orbital elements: Inclination of orbit: 119.10280 Semimajor axis: 55.2024646 Argument of perihelion: 357.93351 Eccentricity: 0.9552661 Long. ascending node: 39.21943 Inclination of orbit: 119.10280 Mean anomaly: 2.99578 Argument of perihelion: 357.93351 Mean daily motion: 0.00240307 degrees/day Long. ascending node: 39.21943 Epoch of elements: 6 Mar 2006 Mean anomaly: 2.99578 Uncertainty level: 0 Mean daily motion: 0.00240307 degrees/day 529 observations made at 4 oppositions Epoch of elements: 6 Mar 2006 Orbital arc: 2001-2004 Uncertainty level: 0 Last observed: 2004 06 22 529 observations made at 4 oppositions RMS residual: 0.45 Orbital arc: 2001-2004 Perturbing objects used in orbit: M-v Last observed: 2004 06 22 Orbit computed by MPC RMS residual: 0.45 Orbit based on the JPL DE403 positions and masses Perturbing objects used in orbit: M-v Cubewano or scattered disk object Orbit computed by MPC Reference: MPO 66046 Orbit based on the JPL DE403 positions and masses Cubewano or scattered disk object Reference: MPO 66046 John Fletcher F.R.A.S. Mount Tuffley Observatory. Code J93 YEAR 2002 AT TIME OF MY OBSERVATIONS: Latitude: North 51 degrees 49minutes 51.3seconds. Longitude: West 02 degrees 15minutes 26.6seconds. (65407) 2002 RP120 mag 15.5 Homepages: Period of orbit 416.24 years (152030.4 days) Perihelion distance 2.47 AU The name Cubewano comes from the pronunciation of the first in Aphelion distance 109.02 AU the group of objects, QB1. (Say “cu-be-wan-oh”). Orbital elements: Semimajor axis 55.7469782 AU Found in www.ency-astro.com online astronomical enyclopædia. Eccentricity 0.9556560 William Inclination of orbit 119.1091000 degrees Argument of perihelion 357.9859000 degrees Long. ascending node 39.2053000 degrees Mean anomaly 2.0043000 degrees Kuiper belt asteroid Epoch of elements JD 2453400.5 (30 Jan 2005 0:00) Right ascension: 02h11m05.037s

Mercury, July 2006, Volume 24 Issue 2 Page 4 WHAT’S IN A NAME !! is said that a 4” scope will show its two ‘wings’. To the East is a line of four bright stars, to the West two pairs By Tony Ireland of stars arranged as a long rectangle.

ne of the curiosities of the human race is its Much easier and within view of everyone reading this are Opropensity to give names to objects, not just by the SEVEN SISTERS known to us experts as M45 in definition but by inference. This oddity occurred to me Taurus. No need to tell you about this object. You should recently when I was flipping through the pages of the know the stats off by heart !! latest magazine issued by the US magazine ASTRONOMY entitled ATLAS OF THE STARS, which claims to be the Almost as easy is another of my favourites which has ‘affordable guide that will last a lifetime.’ Throw away been flirting with planets this Spring, the BEEHIVE all those Nortons and Sky Catalogues then….. CLUSTER M44 in Cancer. Seen best in binoculars the Beehive glistens wonderfully against a dark sky. You can In the last 30 years or so, probably longer, the popular just see it with the naked eye on a good moonless night. press has twisted itself into all sorts of contortions in With a low powered telescope you will probably not get seizing upon a name of a celebrity and re-branding it all the stars in the same field of view. into something else which they believe to be catchy and memorable or more often derogatory, especially if it is a Far more spectacular, however, is probably the best politician or a Royal. But astronomers are more subtle. globular cluster visible from the Northern hemisphere, the HERCULES CLUSTER M13. You should be able to Since earliest times humans have gazed up at the sky find it easily in binos two thirds of the way between and imagined all sorts of objects up there. Thus Zeta and Eta Hercules. It is the eighth brightest globular constellations evolved. Though it beats me how those in the sky at Mag 5.8. It will thrill you in binos and for ancients came up with most of their names bearing in those of you with an 8” scope or more it is a real stunner mind the clarity of the night sky revealing countless stars for first time astro visitors to your telescope in late spring – unless they lived in Skipton where it is permanently and early summer. They should see at least 100 stars in cloudy !! Oddly, nowadays, we should find it easier to your eyepiece. It is said that with magnification above make out the patterns of those constellations because x150 you may see something called ‘the Propeller’, three light pollution reduces the number of visible stars, dark lanes in the centre . revealing the brighter ones, which form the basis of those ancient outlines. Now for one of John Fletcher’s favourites - the WILD DUCK CLUSTER, or M11. Look 2 degrees SE of Beta So what is it about this ‘Atlas’ which has moved me to Scuti, this splendid Open Cluster glistens at Mag 5.3 thus write these little pieces ? Well it seems Americans love making it another naked eye object on a really good to create imaginative objects in the sky as imaged night. How did this object acquire its name ? It is said through powerful telescopes. Roaming through the that one William Henry Smythe, back in the 19th century illustrations in the book I have come across both animate described it in his notes a s flock of Wild Ducks in flight and inanimate objects by the score. It has to be said that because of its triangular shape. A 6” scope will show that imagination has, on the whole, been pretty accurate. over 100 stars. The only problem for us mere amateurs with our tiny 10” or 12” scopes is that we shall never SEE most of Finally another globular, even brighter than any of the those listed objects and probably will not be able to above THE JEWEL BOX NGC 4755. Sadly we cannot see image successfully more than one third of them. this from ‘up here’. But if you venture South of the Equator, especially Oz or New Zealand in their winter Nevertheless let me lead you into this world of make time you will see it high in the sky in the tiny constellation believe, leaving you to look up these objects on the of Crux, a sort of mini Cygnus. On its Eastern edge it is Internet, or if you can suss out £5.00, buy the ATLAS just visible to the naked eye. It looks good in any yourself which is on sale at WH Smiths until 3rd October. telescope, though just 25 stars are visible compared with the proliferation in our previous selections. But it is the By far the greatest number of objects are Nebulae, colour of the three principal stars which give it its name – followed by Galaxies and least of all Star Clusters. Lets yellow, blue and orange, surrounded by pure white ‘diamonds’. begin with them. There are roughly 200 in our Milky Way and nearly one third of them can be found in just Start saving …………………….. three of the eighty eight constellations: Scorpius, Sagittarius and Ophiuchus. You will come across some Next time we will bring back our Zoo trip, and go of your favourite objects straight away, visible in hunting for named Galaxies …. binoculars and most small scopes. TONY IRELAND Try the OWL CLUSTER one which personally I find hard to make out, even from the photo in the magazine. NGC 457 is an open cluster (very open !) less than six Moon widths (3 degrees)South of Delta Cassiopeia. It

Mercury, July 2006, Volume 24 Issue 2 Page 5 THE AMSAT-UK INTERNATIONAL COORDINATOR’S SPOT SPACE COLLOQUIUM Callum Potter From Duncan Willoughby ou will have received either with this copy of YMercury, or at the July meeting, a voting form for his will be held in Guildford on 28-30th July. Further this years Awards. We changed the system a couple of Tdetails can be found here: years ago so that members could nominate who they felt had made the best images or contributed most to the http://www.uk.amsat.org/Colloquium/ society, and then later vote on those. This seeming better than just a single voting form with no suggestions. A few The programme includes a talk about how amateur radio have commented that in the past year there has not been operators detected radio signals from Voyager 1 (abstract much shown for the Dan Turton award in particular, below)! making a choice difficult. In fact we have had two nominations for the Dan Turton ‘imaging’ award, and Cheers, one for Robin Townley award, so we will be holding a vote, but I certainly want to encourage more members to Mark S. Bentley ([email protected]) come forward and show their work, or help out the cosine Research B.V. http://www.cosine.nl/ Society in other ways. Niels Bohrweg 11, NL-2333 CA Leiden, The Netherlands Phone: +31 715 241 091, Fax: +31 715 284 963 It might be true that in the past year that observing weather has not been very good, but a number of Speaker announced for Space Colloquium members have been able to make nice observations, images and drawings if you look back over the issues of Achim Vollhardt, DH2VA, will present a speech about Mercury. Perhaps as a nation we have a certain reticence how radio amateurs detected signals from the Voyager 1 about showing work, but sharing your work with others, space craft at this year’s International Space Colloquium. shows what can be achieved, encourages others to try, At a distance of 14.7 billion km, this is the furthest DX and is a spur to improve technique. We have (the Society signal ever to be received by radio amateurs. It was that is), three main routes for showing members work: achieved by an international team from the UK and German arms of amateur radio group Amsat. 1. Mercury 2. The Website Voyager 1 was launched on 5 September 1977 by NASA. 3. Meetings It transmitted the first close-up pictures of Jupiter and Saturn. Although the spacecraft is now exiting the solar We nearly always have a digital projector at meetings, so system, it is still providing scientists with useful data, there is really no reason why we cannot show your including measurements of the interstellar magnetic images. Bring them along on a CD or Stick, or email in field. advance to Mark or myself. If you still use film, we do still have a slide projector. Just let me know in advance The 21st International Space Colloquium takes place on 28-30 of the meeting, and we will be sure to have it available. July at the University of Surrey in Guildford. In addition to Or if you prefer to print them, why not create a poster DH2VA’s speech, the event includes a guided tour of the for display at the meetings. satellite assembly facilities and satellite mission control centre at Surrey Space Centre. There will also be a programme of I am sure William would be very pleased to be swamped lectures on amateur radio satellites, including a special with images, and I am sure he would endeavour to print beginner’s session aimed at showing newcomers how to use as many as possible. The electronic PDF is in full colour, amateur satellites. The GB4FUN amateur radio so your images can be seen at their best. demonstration vehicle will also be in attendance to help visitors work some satellites. We are currently limited for space on the website, and when it is due for renewal we will move to a new Amateurs and short wave listeners are encouraged to supplier with more space. Also I will take the opportunity attend the space colloquium. to redesign the site so that there are more facilities, such as a forum and picture gallery. Of course if anyone else For further details about the event, contact Jim Heck, would like to help out with this project, just get in touch G3WGM, on telephone number 01258 453959 or at e-mail and get involved. However, even with the existing site, if address g3wgm@amsat.org. new images come along, I will revolve out the older www.uk.amsat.org/Colloquium ones. So please send your pictures in.

http://www.uk.amsat.org/Colloquium/default.php The system of nominations was chosen to try and make Students for the Exploration & Development of Space it easier for members to decide, but if you have ideas (www.uk.seds.org) about any alternatives please let me know.

Mercury, July 2006, Volume 24 Issue 2 Page 6 Our August meeting (on the 12th) is our ‘regular’ Members Night – if any members would like to make a BAA Beginners Workshop short presentation about anything that interests them 28th October (with an astronomical theme, of course), then you would e are hosting a BAA Beginners Workshop at be most welcome. Long presentations are not essential, WShurdington Social Centre in October. The and it would be good to have three or four 20 minute programme for the day is: short talks. Please let Mark or me know as soon as possible, if you would like some time that evening. 10.00 – 10.30 Registration tea / coffee 10.30 – 10.45 Official Welcome - President BAA As we have now passed midsummer, the nights are once 10.45 – 11.30 Solar Observing – Lyn Smith again getting longer, and we can start to look forward to 11.30 – 12.15 Equipment Demonstration & Advice observing at a more reasonable hour of the evening. In – Bob Marriott particular, August skies can be excellent, so lets hope for 12.15 – 13.30 Lunch good observing weather. 13.30 – 14.15 Calculating Magnitude - Guy Hurst 14.15 – 15.00 Imagine – Martin Taylor Clear skies, and good observing, 15.00 – 15.30 Tea / Coffee Callum 15.30 - 16.45 Walking the night sky for deep sky objects – Guy Hurst 16.45 – 17.00 Closing address FORTHCOMING EVENTS From Callum Potter The price for the day is normally £10, but CAS members can attend for the cost of refreshments and lunch only - here are quite a few interesting events coming up, so £5. If you wish to come, please let me know in advance here are a few highlights. (by 6th October), so we can ensure sufficient catering. If T you are a BAA member also, you will receive a notice from the BAA, but CAS members should register with ‘ ’ series of events at Compton The Starry Messenger me rather than the BAA Office. In addition to the talks Verney. there are hoped to be a number of displays.

lthough a little out of our area (Compton Verney Callum Potter Abeing somewhat east of Stratford), there are a few interesting events at this gallery. There will be special exhibition of space related art from July 7 to September 10th, including talks by John Mason (July 20) and Allan Chapman (August 10). Events include an outdoor EDITOR’S CORNER showing of 2001 A Space Odyssey (Sept 2), and a star his is my second attempt at producing Mercury _ I gazing evening (August 26). In fact we are facilitating the Thope you liked the first. Admittedly this one is rather observing this evening, so if any members with portable lighter on images but as Callum mentioned I would telescopes would like to come and help show the stars on gratefully receive them and do my best to do them that evening you would be most welcome. Expenses justice. would be paid, and the society will receive a donation. Please let Duncan or myself know if you will be coming Some of you may have read on the Society’s group email to help. and also elsewhere in Tony Irelands DFYD in this issue that More details about the events at Compton Verney can be next year the Society will be 25 years old. Ideas about how found on their website at: to mark the occasion will, I’m sure, be welcomed. http://www.comptonverney.org.uk My thanks to all who contributed to this issue. Equinox Star Party akes place this year with the main event being over CHELTENHAM SCIENCE FESTIVAL Tthe weekend of 23/24th September. I am going for a William Jackson few days this year, so should be fun ! I will write a report for a future Mercury after the event. s some of you did, I went to the Cheltenham Festival of AScience and attended a few of the talks. Unfortunately I FAS Annual Convention – Birmingham didn’t take any notes so my recollections are somewhat Midlands Institute. sketchy. n the 30th September, this is conveniently located for Ous this year, and a top range of speakers are Prof. The first on Wednesday 7th June was Deep Sea to Deep John Brown (Astronomer Royal for Scotland), Allan Space. This was given by Alice Porter and she took us Chapman, Dr Somak Raychaudhury, and John Dobson. through the protection explorers need to wear to Tickets are £10 in advance (from me !), or £12 on the day safeguard themselves in different environments from the at the door. heavy pressures at the bottom of the oceans to the dangers of space.

Mercury, July 2006, Volume 24 Issue 2 Page 7 The next on Thursday 8th was to have been Gardening the Universe, however that was cancelled.

On the same evening was Particle Odyssey with Frank Close who took us into the realms of the sub-atomic particle. He explained the need to build very big machines to look for the very small. One such being built at CERN which stands for Counseil Européen pour la Recherche Nucléaire.

Then on Saturday 10th I went to Britain in Space which hosted by David Williams with Mike Healy from EAD Astrium and Fred Taylor, Professor of Physics at Oxford University.

They discussed Britain’s role in space, what satellites were to launched and their functions. They also discussed the follow-up mission to Beagle 2 and it seems there is going to be one.

Another topic was Europe’s version of the Satellite Navigation System.

Will we see a British astonaut on Mars was argued. The various points being discussed but no firm conclusion was formed.

Sunday 11th I attended Superstrings which involved strings of a cosmic nature and those of a violin.

Not many people realise that aprt from being a physicist Albert Einstein was an accomplished violinist. For this talk physicist Brian Foster was joined by violinist Jack Leibeck who gave recitals at various points in the talk.

At the end the two performed a violin duet.

Later the same evening, and the final event I attended, was Islam and Astronomy with Robert Massey from The Royal Greenwich Obsevatory, Steve Bell of HM Nautical Almanac Office and Usama Hasan of Middlesex University and the Muslim Council of Britain.

As we know the Arabs played a large role in astonomy, many of the stars bearing arabic names. But thir religion, Islam, is based on the Sun and the Moon. The Moon governs their calendar and the Sun indicates the time of day for prayer.

PARTIAL SOLAR ECLIPSE John Fletcher

his was the view from Tuffley of the 29th March Teclipse some of you travelled to see in its totality. The equipment was a Canon 300D SLR set on manual with a 500mm F8 Vivitar Mirror Lens. Mylar film solar filter fitted to the front of the lens. It was tripod mounted with handset control for smooth shutter control. The

Mercury, July 2006, Volume 24 Issue 2 Page 8 Monthly Meetings and Events Directions to Shurdington July 2006 onwards Millennium Hall

8th July From Cheltenham TBA Follow the A46 towards Bath/Stroud which passes through Shurdington. In Shurdington 12th August turn right into Church Lane, then 2nd left into TBA Bishops Road. Millenniun Hall is immediately on the left. 9th September “Aurora — Origin, Observation, Reporting, From Gloucester Photography”. Bob Mizon Follow the A417 towards Cirencester. At the roundabout with the A46 turn left towards Cheltenham. This road goes through Monthly meetings of The Cotswold Shurdington. In Shurdington turn left into Astronomical Society (CAS) are held on the Church Lane, then 2nd left into Bishops Road. second Saturday of each month in Shurdington Millenniium Hall is immediately on the left. Millennium Hall, Bishops Road, Shurdington, starting at 7:45pm. From Cirencester Follow the A417 towards Gloucester. At the Prospective new members are always welcome roundabout with the A46 tun right towards to come and seewhat we do before deciding to Cheltenham, this goes through Shurdington. In join. Shurdington turn left into Church Lane, then 2nd left into Bishops Road. Millennium Hall is immediately on the left

Mercury, July 2006, Volume 24 Issue 2 Page 9 Society Officers Special Events Officer Duncan Willoughby 69 Wellsprings Road Co-ordinator Longlevens Callum Potter GLOUCESTER The Cottage GL2 0NJ Bredon’s Hardwicke Tel: 01452 416405 TEWKESBURY Email: [email protected] Glos GL20 7EE Mercury Editor TEL: 01684 773256 (Home) William Jackson 01242 229741 (Work) 4 Bathurst Road Email: [email protected] Chesterton CIRENCESTER Treasurer and Membership Secretary Glos Rod Salisbury GL7 1SA Grove House Tel: 01285 659837 Christchurch Road Email: [email protected] CHELTENHAM Glos GL50 2PN Tel: 01242 516416 Email: [email protected] The Cotswold Astronomical Society Events Organisers was Established in 1982 and is a member of Mark & Denise Gibbons The Federation of Astronomical Societies 85 Winmill Road Minchinhampton STROUD Web Site Glos Http://www.cotswoldas.org.uk GL6 9ED Tel:01453 731108 Mobile: 07866 907017 Email Email: [email protected] [email protected] Newsletter Distributor Rosemary Salisbury You may choose to receive your Mercury in (As Rod Salibury above) PDF form, this will help us to keep down costs.

Librarian The next issue of Mercury will be September Peter Cadogan 2006. If possible please ensure all materials for Elville House publication reach me by the end of August. 125 The Park Thank you, William. CHELTENHAM Glos The Cotswold Astronomical Society GL50 2RQ Will Be Tel: 01242 235471 (Home) 01242 582451 (Work) 25 Years old in 2007 Email: [email protected] Just a gentle reminder

Mercury, July 2006, Volume 24 Issue 2 Page 10