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Journal of the Association of Lunar & Planetary Observers ISSN-0039-2502 Journal of the Association of Lunar & Planetary Observers The Strolling Astronomer Volume 53, Number 4, Autumn 2011 Now in Portable Document Format (PDF) for Macintosh and PC-compatible computers Online and in COLOR at http://www.alpo-astronomy.org Inside this issue. • Minutes of the ALPO Board Meeting in Las Cruces • The comings and goings of Mercury in 2010 -- all six times! • “Double-Digit” observations of the Moon for even more appreciation • The rotation period of minor planet 280 Philia finally established • Observations of Jupiter in 2009 and 2010 . plus reports about your ALPO section activities and much, much more! Sunrise on Tycho On June 10, 2011, NASA's Lunar Reconnaissance Orbiter spacecraft pointed the LRO Camera NACs to capture a dramatic sunrise view of Tycho crater. The central peak complex is about 9.3 miles (15 km) wide, left to right (southeast to northwest in this view). More info on page 1 (inside) (Credit: NASA Goddard/Arizona State University) The Strolling Astronomer Journal of the In this issue Association of Lunar & Inside the ALPO Point of View: Another JALPO — Finally! ...................3 News of General Interest ............................................4 Planetary Observers ALPO Interest Section Reports...................................4 ALPO Observing Section Reports...............................5 The Strolling Astronomer Sponsors, Sustaining Members, and Newest Members.....................................................15 Volume 53, No.4, Autumn 2011 This issue published in September 2011 for distribution in both portable document format (pdf) and also hardcopy format. Feature Stories ALPO Observations of Mercury During the This publication is the official journal of the Association of Lunar & 2010 Apparitions......................................................19 Planetary Observers (ALPO). Double-Digit Observing the Moon.............................25 Rotation Period Determination for Minor Planet The purpose of this journal is to share observation reports, opinions, 280 Philia – A Triumph of Global Collaboration .......31 and other news from ALPO members with other members and the ALPO Observations of Jupiter During the professional astronomical community. 2009-2010 Apparition ..............................................33 © 2011, Association of Lunar and Planetary Observers (ALPO). The ALPO Resources ALPO hereby grants permission to educators, academic libraries and the professional astronomical community to photocopy material for Board of Directors ....................................................43 educational or research purposes as required. There is no charge for Publications Staff .....................................................43 these uses provided that credit is given to The Strolling Astronomer, Interest Sections ......................................................43 the “JALPO” or the ALPO itself, as appropriate. All others must Observing Sections ..................................................43 request permission from the ALPO. ALPO Publications ...................................................44 ALPO Staff E-mail Directory .....................................45 For membership or general information about the ALPO, contact: Back Issues of The Strolling Astronomer .................47 Matthew Will Our Advertisers ALPO Membership Secretary/Treasurer P.O. Box 13456 Orion Telescopes & Binoculars ...................................2 Springfield, Illinois 62791-3456 Announcing the ALPO Lapel Pin ................................5 Catseye Collimation Systems/Catsperch E-mail to: [email protected] Observing Chairs .....................................................10 Galileo’s Place .................................Inside Back Cover Sky Publishing ..............................Outside Back Cover Visit the ALPO online at: http://www.alpo-astronomy.org Sunrise on Tycho (cover image details from NASA) Tycho is located at 43.37°S, 348.68°E, and is about 51 miles (82 km) in diameter. The summit of the central peak is 1.24 miles (2 km) above the crater floor. The distance from Tycho's floor to its rim is about 2.92 miles (4.7 km). Many rock fragments ("clasts") ranging in size from some 33 feet (10 m) to hundreds of yards are exposed in the central peak slopes. Were these distinctive outcrops formed as a result of crushing and deformation of the target rock as the peak grew, or do they represent pre-existing rock layers that were brought intact to the surface? Tycho's features are so steep and sharp because the crater is only about 110 million years old -- young by lunar standards. Over time, micrometeorites and not-so-micro meteorite will grind and erode these steep slopes into smooth mountains. Volume 53, No. 4, Autumn 2011 Page 1 Your Affordable The Strolling AstronomerSince 1975 Astro-Imaging Source #9534 ED80T Carbon Fiber Triplet Apochromatic Refractor $799.99 #9534 ED102T Carbon Fiber Triplet Apochromatic Refractor $1,999.99 #9530 The Leo Trio (M65, M66 and NGC 3628) – Taken with the Orion ED102T CF Refractor, StarShoot Pro V2.0, Orion Atlas EQ-G, and Orion StarShoot AutoGuider. 23 x 10 minute #9530 exposures combined. Orion image. StarShoot™ G3 Deep Space StarShoot™ AllSky Magnificent Mini AutoGuider Package Imaging Camera Camera $349.99 #24781 $499.99 #53082 Color $899.99 $499.99 #53083 Mono #52187 NTSC Std. StarShoot™ Deep Space Video Camera $499.99 #52185 Parsec™ NTSC Std. 8300C Color Astronomical Imaging Camera $1,799.99 #52075 SteadyPix™ Deluxe StarShoot™ Solar SteadyStar™ StarShoot™ 0.5x Deluxe Off-Axis 1.25" Camera Mount System Color Adaptive Optics Focal Reducer Guider Astrophotography $46.99 #5338 Imaging Camera IV Guider $44.99 $129.99 #5521 Flip Mirror $99.99 #52175 $1,499.99 #53076 #52086 $139.99 #5523 Prices subject to change. Orders: (800) 447-1001 Check out the Orion page on Facebook PageDealer pricing 2 and/or VolumeOrionTelescopes.com 53, No. 4, Autumn 2011 promotions may vary. Customer Service: (800) 676-1343 www.facebook.com/oriontelescopes The Strolling Astronomer Inside the ALPO Member, section and activity news Association of Lunar & Point of View Planetary Observers (ALPO) Another JALPO — Finally! Board of Directors Executive Director (Chair); Julius L. Benton, Jr. By Ken Poshedly, editor & publisher, The Strolling Astronomer Associate Director; Ken Poshedly Member of the Board; Sanjay Limaye OK, ok, ok! Yep, your JALPO is a little bit later than usual. Member of the Board; Donald C. Parker Even when it looked like it would actually be either on time Member of the Board; Ken Poshedly or even a little early, disaster struck — two, in fact, in my Member of the Board; Michael D. Reynolds case. Member of the Board; Richard W. Schmude, Jr. Member of the Board; John E. Westfall The lessons: Prepare for two inevitables — a hard disk Member of the Board & Secretary/Treasurer; crash (with some kind of backup strategy) and a major Matthew Will computer virus infection (I already have good antivirus Founder/Director Emeritus; Walter H. Haas protection, but a new rootkit virus slowed me down, a lot.) Publications Anyway . the highlights in this JALPO are: Editor & Publisher, Ken Poshedly • A report by ALPO Membership Secretary/Treasurer on Primary Observing Section & our membership rolls. We’re doing ok, but all of you Interest Section Staff should talk up our fine group to your astro-friends. (See full listing in ALPO Resources) Lunar& Planetary Training Section: • The official proceedings of this summer’s meeting of the Timothy J. Robertson ALPO board of directors. There you’ll see how our group Solar Section: Kim Hay is handling these tough times. Mercury Section: Frank Melillo Venus Section: Julius L. Benton, Jr. • A new feature with the spotlight on the ALPO Minor Mercury/Venus Transit Section: John E. Westfall Planets Section. We hope this report on the determination Lunar Section: of the rotational period of asteroid 280 Philia will spur Lunar Transient Phenomena; Anthony Cook more of you to try your hand at this challenging activity. Lunar Meteoritic Impact Search; Brian Cudnik More such reports will follow. Lunar Topographical Studies & Selected Areas Program; Wayne Bailey • A nice look at how “double-digit” (that is, higher focal Mars Section: Roger Venable length, lower power) lunar observing can actually be more Minor Planets Section: Frederick Pilcher rewarding than one might think. Thank Bill Dembowski for Jupiter Section: Richard W. Schmude, Jr. this unexpected treat. Saturn Section: Julius L. Benton, Jr. Remote Planets Section: Richard W. Schmude, Jr. • A compilation and report by Frank Melillo of the six Comets Section: Gary Kronk apparitions of Mercury in 2010. This guy is a veritable Meteors Section: Robert D. Lunsford expert of all-things Mercury and we’re lucky to have him Meteorites Section: Dolores Hill and his enthusiasm. Computing Section: Larry Owens Youth Section: Timothy J. Robertson • Another exhaustive study, this one of the many Historical Section: Richard Baum observation reports submitted by 175 different observers Eclipse Section: Michael D. Reynolds about Jupiter during its 2009 - 2010 apparition. You will be ALPO Website: Larry Owens pleased to know that Jove is behaving normally and the South Equatorial Belt is definitely back (or at least for awhile). Volume 53, No. 4, Autumn 2011 Page 3 The Strolling Astronomer Inside the ALPO Member, section and activity news News of General Interest Archival Issues of ’The Minor Please also include one additional page Sapas Mons. All are near
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