TRANSIT The Newsletter of 05 March 2009 Comet Lulin – imaged by Keith Johnson Front Page Image : Due to the very poor weather conditions recently and poor weather predicted in the coming days I decided to grab the opportunity in capturing Comet Lulin as a very small window of clear skies for an hour was forecast Wednesday evening at around 9pm, however - this meant taking the equipment to work and set up in a relatively dark area within the factory perimiter, fast moving low cloud made things very difficult and as increasing cloud cover was predicted for the rest of the night I decided that I had to grab what frames I could - sadly I was only able to obtain 2 frames before the cloud rolled in, thus it has got to be one of the most difficult image captures of any object I have ever encountered simply because of the poor weather conditions. The comet certainly is a naked eye object and my opinion and from the light polluted area where I was situated the comet looked more like a star of about 4th magnitude, rather than use the Canon 300D DSLR I opted for my brand new Canon 1000D using a 200mm fixed lens and CLS clip filter ( light pollution filter), with "live view" the camera focus is now incredibly easy to set up. If the weather is kind at the weekend I'll be having another go but this time using the EQ6 Pro. and 80mm ED with auto guiding assistance. Best Regards, Keith. 26 February 2009 Last meeting : 13 February 2009, "X-Ray Astronomy" by Dr Tim Roberts, of Durham University Next meeting : 13 March : “Calendars of the World” by Dr Colin Steele of University of Manchester Institute of Science and Technology. There were two new members, xxxxxxxxx, who were welcomed to the Society and given new member's information packs. Please note the venue for the next meeting :- 7.15pm for a 7.30 pm start, Grindon Parish Hall (in Thorpe Thewles, our previous meeting place). Please note. The Society dues for 2009 were due in January. The cost is only £9.00. If applicable please pay your outstanding dues to our Treasurer, Ian Miles, at the next meeting. 2 Letter to the Editor From John Crowther From Transit last month I was interested in Rob Peeling’s article “Skylights” and the challenge to see Venus as Galileo did. But was it the objective or the eyepiece lens which was concave? I have a field glass, German made, of probably WW1 vintage. It has an acceptable field of view and is just capable of picking out the Galilean satellites of Jupiter. I once owned a British made pair large field-glasses, like the ones seen on the film “Zulu”. They had two objectives and had belonged to my Grandfather, a Master Mariner in the Merchant Navy. These were probably the same as the locked-away ones not available to the two lookouts high up in their crow’s nest on the “Titanic” on 14 April 1912. Back to Galileo. With his x14 and x20 magnification his field of view would be extremely narrow. Would anyone like to work it out? Also the planets phase would be most easily seen, yet hard to find in the blue sky just before or after sunset. ----------0000000--------- The Grubb-Parsons Lecture 2009 Sponsored by the Royal Astronomical Society Hot Results on Cool Galaxies The Hidden Universe Revealed By Professor Rob Kennicutt Institute of Astronomy University of Cambridge Wednesday 18 March 2009, 4.30pm Appleby Lecture Theatre, Science Labs (South Road Entrance) -------------00000000------------- Some fantastic Sun images – have a look on http://www.boston.com/bigpicture/2008/10/the_sun.html 3 Skylights - March 2009 from Rob Peeling The Moon 04 Mar 11 Mar 18 Mar 26 Mar First Quarter Full Moon Last Quarter New Moon Planets Venus continues to be very prominent in the evening sky. It is now moving towards the Sun and will pass it in the sky (inferior conjunction) on 27th March. It will be becoming a skinnier crescent as each day passes. REMEMBER: Especially towards the end of the month as Venus comes closer to the Sun, please don’t risk losing your eyesight by searching for the planet with either binoculars or a telescope before the Sun is completely below the horizon. Saturn is at its best in March and can found under Leo’s hindquarters. Titan is easy to see in pretty much any telescope and with many binoculars. Note how narrow a line the rings are now as they become more nearly edge on to us. How many moons other than Titan can you spot? Up to five different ones can easily be seen with perhaps two or three more possible to spot in the right conditions. My personal observing records claim a total of eight at various time (not all at once) with one observation each of Mimas, Enceladus and Hyperion – I am not sure I really believe this myself – there must be at least one misidentified! Rhea, Dione, Tethys and Iapetus are however readily observed. Dwarf Planets In February I followed my own advice and successfully found Ceres for the first time. The dwarf planet is definitely visible with binoculars and it is slightly easier to identify with them rather than a telescope. Throughout March Ceres moves across the back of Leo. It is in the constellation Leo Minor rather than Leo. 4 Comets & Meteors There are no major meteor showers during March. Comet 2007 N3 (Lulin) may well be easy to spot during March. Current estimates (around 20th Feb) have it near naked eye visibility. On Feb 24th it will be very close to Saturn and will sweep right under the constellation of Leo (grazing the star Regulus on 28th Feb) and then move outwards into Cancer. 5 Deep Sky If the weather cooperates then the southern sky in March is full of interesting objects. Cancer Look out for the large open cluster M44 named Praesepe or the Beehive cluster. It is easy to find as a glowing patch either in your finder or binoculars just below the midpoint of an imaginary line between the bright stars Pollux in Gemini and Regulus in Leo. In the telescope it becomes a huge bright cluster. Try and see if you can see it with the naked eye. I have been surprised at how visible it is through considerable light pollution. I have seen the Beehive with my naked eye both at home and at the planetarium. Out on the North Yorks moors you can’t miss it. Once seen with the naked eye, the [translated] Chinese name for it; Ghosts, becomes obvious. The other Messier open cluster in Cancer, M67 is also worth seeking out. This cluster is 2600 light years away, containing ~ 300 stars. It is between 4-5 billion years old making it a similar age to our Sun and it is one of the oldest open cluster you can easily view. Starting from M44, look for the delta Cancri which is the star slightly below and to the left of M44 in your finder. Now scan down (south) for the next star of similar brightness, alpha Cancri. Fit a low power lens and nudge the telescope about a field width or so to the right (west) and M67 should appear. 6 Leo The pair of galaxies M65 & M66 should be fairly easy to spot with a low power lens in a moonless sky. Look for the right angle triangle of stars made up of Denebola, Zosma and theta Leonis that marks the hindquarters of the lion. Centre your finder on theta Leonis which marks the right angle of the asterism. Now scan with the finder below (south) of theta to find a line of three stars with 73 Leonis the brightest. Using the telescope move left (east) a field width or two to spot the two galaxies. Can you detect a third galaxy, NGC 3628 which lies just to the north of Messier’s pair? All three are spiral galaxies like our own Milky Way. The next targets are also spiral galaxies in Messier’s list. I find these harder to track down than M65 & M66. This is because there are fewer signposts in the surrounding star field to help you find them. Find M95 and M96 by initially centring Regulus in your finder. Scan south-east (mostly left and a little down) to find bright rho Leonis with its distinctive surrounding fairly bright stars. Use rho and 44 Leonis as pointers to guide you to 53 Leonis. Now switch to the telescope with a low power lens and search northwards (upwards) to find the galaxies. M96 and the nearby elliptical galaxy M105 are generally more easily spotted than the somewhat fainter M95. All maps are zoomable Caldwell Objects For the last three suggested targets for March, I am leaving the well-known Messier catalogue and picking Caldwell objects. The Caldwell list is 110 of Sir Patrick Moores favourite objects which was first published by Sky & Telescope in 7 Dec 1995. Mostly it picks up all the best views that Messier didn’t include but it also includes some harder to see objects because they are interesting. Caldwell is part of Sir Patrick’s full surname, Caldwell-Moore. Caldwell 39 = NGC 2392, the Eskimo planetary nebula in Gemini This is a bright planetary nebula (almost as bright as M57, the Ring Nebula). You will almost certainly have seen professional images of this from e.g. the Hubble telescope. Search with a low power lens and then increase the power to as much as it will bear once found.