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June 2013 Volume 24 Number 6 - the Official Publication of the San Jose Astronomical Association

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June 2013 Volume 24 Number 6 - the Official Publication of the San Jose Astronomical Association The Ephemeris June 2013 Volume 24 Number 6 - The Official Publication of the San Jose Astronomical Association. Houge Park June Events From the Editor - Mina Wagner 6/2 Hello friends! Summer is fast approaching and Solar observing. 2 - 4 p.m. Star Party season is just around the corner. It’s Fix-It Day 2 - 4 p.m. time to get the telescopes out, clean them, review your observing accessories, cold-weather 6/14 clothes, favorite snacks and drinks, thermoses, Star party. 9:30 p.m. - midnight. etc. One major star party already took place, the Texas Star Party (TSP) in the West Texas desert, and the Golden State Star Party (GSSP) begins on July 6th in north-east California. 6/21 Beginners Imaging Group 7:30 - 9 pm If you have never been to GSSP you should treat yourself this year. The skies are very dark, the scenery spectacular, and the Albaughs, our hosts, make it feel like a family affair. 6/22 General Meeting Please check our website: sjaa.net for updates on local weekend star parties. If you have 7:30 - 8 p.m. Social time pot luck never joined us for those you should go to one. Bring your telescope, or just bring yourself. 8 - 10 p.m. Speaker: Dr. Dana Backman, Children will love the experience and will never forget it. You can look through other peo- “SOPHIA—Science from 41,000 Feet”. ple's telescopes and share a nice evening of observing. Don't forget your jacket and snacks. 6/28 If you have any ideas about an observing trip, maybe you want to share them and we can 7 to 8:15 p.m. Board of Directors organize an outing and have other people join us for it. Beginners Class 8:30 - 9:30 p.m. Astronomy Day 2013 Members of your club showed up for SJAA Contacts Astronomy Day 2013, and treated the public to the best show in the solar sys- President: Rob Jaworski tem—our very own star, aka—The Sun. Vice President: Lee Hoglan Treasurer: Michael Packer The photo at left is of the SJAA’s partic- Secretary: Teruo Utsumi ipation at Martin Luther King Library in Director: Rich Neuschaefer downtown San Jose. The SJAA partici- Director: Greg Claytor pates at numerous events aside from the Director: Dave Ittner usual “solar observing” dates at Houge Director: Mina Reyes Wagner Park, our home, the first Sunday of the Director: Ed Wong month, 2-4 p.m. Never seen surface detail or prominences? Come out! Beginner Class: Mark Wagner Deep Sky: Mark Wagner Fix-it Program: Ed Wong In this issue: About the SJAA Imaging SIG: Harsh Kaushikkar From The Editor Pg 1 Library: Susan Worden SJAA Photo of the month The SJAA raises money to support its vari- Loaner Program: Dave Ittner Houge Park Events ous programs through your membership Lunar/Planetary: Akkana Peck and charitable donations. Ephemeris Newsletter - Shallow Sky Pg 2 Editor Mina Wagner Heard And Overheard Pg 3 Small efforts = big results! Its so easy to Production Mark Wagner help the club. Maintain your membership Publicity: Rob Jaworski Mooning At Houge; 1st Quarter Targets Pg 4 Houge Park’s Top Targets Of The Deep and encourage others to join. $20 tax de- Questions: Lee Hoglan ductible memberships are quick and easy. Quick STARt Dave Ittner Cinco de Solar! Pg 5 Solar: Michael Packer Board Meeting Minutes We also hold two fund raising events each School Events: Jim Van Nuland A Mixed Night at Willow Springs Pg 6 year - an Auction in the spring, and a fall Speakers: Teruo Utsumi Upcoming Speakers and Events Pg 7 Swap. If you have astronomy gear you Check It Out, Sunny. Pg 8 don’t use, consider donating it to SJAA. Contact e-mails at: http://www.sjaa.net Contact Board member Dave Ittner. Some Programs & A Heavenly Threesome. Pg 9 midnight, Uranus an hour and a half Shallow Sky later. Mars, too, is a morning object in June Planets June, but only in morning twilight, so By Akkana Peck you're best off waiting a few months to catch the red planet. How to eat a spacecraft looking a lot like an earth-based hurricane, except much bigger. The With so few planets in the sky, let's talk There aren't many planets visible in whole hurricane is nearly the size of our about spacecraft. Last month, I attend- June, as Jupiter sinks deep into the whole planet; the eye alone is about ed part of the Design West embedded dusk twilight and disappears by the end 2000 km across, half the size of systems show in San of the month. Mercury and Venus are Australia. (If you type 2000 km into Jose, and caught a couple of interest- a bit higher in that twilight: Mercury is Wolfram Alpha, it helpfully tells you ing talks related to spacecraft and best during the first half of the month, that's about the same distance, a thou- planetary science. (This is a fun confer- while Venus will improve as the month sand miles, that the Proclaimers would ence if you have any interest in goes on. walk to fall down at your door.) hardware hacking, and an expo pass is free.) But don't give up completely. Saturn is Photos of the hurricane look remarka- well placed for observing all evening. It bly like Jupiter's Great Red Spot, but Luke Dubord, of JPL, was one of the transits at 10:30 pm at the beginning of that's misleading: it's elongated be- keynote speakers, speaking on June, moving to a little before 9 by the cause many photos show it from the "Waiting end of the month. The rings are tilted at side, foreshortened, and it's red be- on the Speed of Light: Engineering Au- 17 degrees to us. cause it's a false-color image, where tonomy at Mars." He talked about the red clouds are lower than the clouds Curiosity rover, and the difficulties in Saturn had a big storm that was in the around it. Still, the image is spectacu- engineering a system that has to news last month, though actually the lar. operate twenty light-minutes away -- so storm has been going on for a lot long- the rover has to be capable of acting on its own for at least forty minutes while it waits for round-trip messages between the Earth and Mars. Curiosity has quite a bit of compute power: 5 processors (2 PPC, 3 SPARC) plus 31 FPGAs split among the various components of the spacecraft. It's a far cry from those old Apollo-era missions. But of course, it's still dependent on human control for most operations. Dubord's talk wasn't highly technical, but it did include a few good quotes, like: "This vehicle is 6-wheel drive, 4 wheel steer, and can probably outrun a tortoise." More detailed was Jack Ganssle's presentation, "Mars Ate my Space- craft!" Ganssle talked about the various ways embedded systems -- like the ones in a er than that. Remember Saturn's Pluto is also visible most of the even- spacecraft -- can fail. strange north polar hexagon? The Cas- ing, transiting a few hours after sini team has been trying to get a look midnight. But it stays very low, never Take the 1999 Mars Polar Lander. Ap- at what's inside the hexagon for some getting even a third of the way to parently the landing electronics were time, but it's been winter on Saturn's the zenith, so you'll have to be fairly never tested under high G loads (like, northern hemisphere, so it wasn't until determined to find it among the say, the ones you might get when recently that they got enough sunlight stars of the Sagittarius Milky Way. landing on a planet). The hardware on it to see inside. (That also means it's not visible to earthbound telescopes, Uranus and Neptune are morning ob- (continued on page 3) alas.) What's inside? A huge hurricane, jects, Neptune rising a little past (Shallow Sky) HEARD AND OVERHEARD… By Mina Wagner engineers knew the electronics might I have heard that the SJAA Board of Directors is going to get a give spurious transient signals leading to a false "Down" indication, but that large screen for our Hogue Park meetings. This will give eve- message somehow never got to the ryone in the hall a clear view without anybody blocking you and having a stiff neck the next day from straining to see. It won't software engineers. So the software saw the first "Down" signal and be exactly stadium seating but it will help tremendously. switched off the engine, while the craft On the same line, I also heard that we are going to have some was still 40 meters up. The MPL crashed. movie nights with popcorn and all kinds of goodies. It will be BYOC (bring your own chair, reclining preferably). I am already cleaning mine so I can enjoy a Ganssle comments that the contractor night of camaraderie and astronomical entertainment! building MPL had the engineers work- I have heard that the Texas Star Party was a success, even though they had a ing 60 to 80 hour weeks for an extend- ed time. This was a recurring theme of couple of days of clouds and rain, they had 3 or 4 nights of perfect dark skies. his talk: "Tired people make mistakes." .Here is a note about it in the New York Times: More recently, we had the Mars Expe- warned the NEAR team -- which was re http:/www.nytimes.com/2013/05/11/ -using some of the Clementine software dition Rover mission (Spirit and us/in-west-texas-a-gathering-to- Opportunity).
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