June 2008 - Utah-Astronomy - mailman.xmission.com

Re: [Utah-astronomy] Ealing - Astro-physics Model 8002 drive controller
by Canopus56 14 Jun '08

14 Jun '08

Chuck, Thank you! That was amazing. The tracking error went down to ziltch - 21" in RA over 600 seconds. A revised tracking graph - which has a competely different scale from the last one - was prepared. Ealing drive tracking error test http://gallery.utahastronomy.com/main.php?g2_itemId=11531 For lurkers that means when the Ealing drive is calibrated and you put Saturn or M13 in the scope - it will stay in the e.p. view for a good half-hour. And to create a new Chuck Hards myth story - The answer on Cloudy Nights was: "Drop Roland and Marj [former Astrophysics owners?] an email. They may still remember..." Chuck's answer was "Oh yeah, I have two of those 30 year old drive controllers in the garage - with autoguiders." A modest start after calibrating the drive - Alberio on the Ealing http://gallery.utahastronomy.com/main.php?g2_itemId=11529 ======================= Use notes on the Ealing for lurkers With drive calibration, the Skywizard still registers an index error of about 0.3 degs in RA only for a 9 deg slew on two tests (Vega to M57 and Vega to M13). That means at best the Skywizard will put a target somewhere in the Mak view, but it cannot be used for actually getting the target into a short-focal length (32-25mm) observing eyepiece. CHEAT SHEET FOR CALIBRATING THE EALING'S ASTROPHYSICS MODEL 8002 DRIVE CONTROLLER The controller uses a quartz crystal to generate a reference signal. Knobs and lights on the front of the controller, left to right, are: Calibration Light Power Mode - Sidereal, Solar, Lunar, Calibrate Calibration Knob - This is non-functioning. Set it to the middle and forget it Auto-Manual RA - Always set to manual Auto-Manual Dec - Always set to manual Plug-input for the slow motion control and also off to the side - Separate slow motion control with rate dial knob. Procedure: 1) On start-up, set the Mode to "Calibrate". 2) The Calibration Light will slowly flicker over 0.5 to 2 seconds. 3) Using the dial knob on slow motion control, turn the knob until the rate of flicker in the calibration light is minimized. Typically, it will flicker over 2-5 seconds. On start-up the crystal is cold and you will not be able to absolutely calibrate the drive rate. You can only do a rough calibration. 4) After using the scope for 30-45 minutes, the reference-signal crystal will reach operating temperature. 5) Repeat steps 1-3. This time you will be able to adjust the calibration light so it will stop flickering and hold with a _steady glow_. 6) Avoid turning the dial rate knob when using the slow motion controller. I bumped it while in the middle of imaging, accidentially changed the setting, and M13 zipped right off the camera chip. Once calibrated, the drift rate for commonly observed objects will effectively disappear and the sub-arcsec drift error rate is in a zone sufficient for astrophotography. Once calibrated, the "lunar" mode also does a fair job of lunar target tracking. In lunar mode, the Ealing will track well within any limitations needed for imaging and stacking lunar images within Registax. Without drive controller calibration, DSO will drift out of an Ealing 32mm-25mm observing eyepiece in two to three minutes. =============== The above probably should be added to the Ealing training cirriculum. Peace - Kurt

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On the terminator tonight (6-14-2008 10pm)
by Canopus56 14 Jun '08

14 Jun '08

On the terminator tonight at 10:00pm 6-14-2008, north to south: J. Herschel Mons Gruithuisen Gamma Aristarchus Gassendi Rimae Gassendi Rimae Mersenius Doppelmayer Schiller See also Rimae Herigonius north-northeast of Gassendi - Kurt

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Re: [Utah-astronomy] Torricelli and Sinus Asperitatis - Ealing 20080608
by Canopus56 14 Jun '08

14 Jun '08

To follow-up on my pics with the geologic story of this lunar region - the story involves surface burial of the Sinus Asperitatis bay with ejecta from Theophilus. As Chuck Wood's _Modern Moon_ notes, the eject melt blanket north of the Theophilus is one of the few on the Moon that are perfectly preserve. The second part of the Sinus Asperitatis - for me - is how it illustrates who perception of features depends on resolution. Theophilus buried the bay. The GLAC map illusrates the boundary of the heavy melt deposit region ejected from Theophilus. http://gallery.utahastronomy.com/main.php?g2_itemId=11517 This thick deposit is seen as the hommocky terrain south of the mesa shown in my pic - http://gallery.utahastronomy.com/main.php?g2_itemId=11507 - and in the fiducial expert imager pics by - Elias Chasiotis http://lpod.org/coppermine/displayimage.php?pos=-1126 and - Riccardo Cosenz http://www.lpod.org/?m=20071006 The extent of the melt blanket is visible at high sun angles, as shown in the Clementine composite. http://gallery.utahastronomy.com/main.php?g2_itemId=11511 A quesion in my mind about the bay is how far north the eject blanket extends. The Clementine False Color ratio map seems to show it going as far north near the mouth of the bay at Torricelli B and C. http://gallery.utahastronomy.com/main.php?g2_itemId=11515 But it is unclear to me how much of this overburden material is from Theophilus and how much from other impacts. In this regard, the craterlet impacts north of the mesa and west of Torricelli act as depth probes. If the crater extends into the mare region below, darker mare basalts would be brought to the surface. This principle is seen at the one ALPO dark halo crater in the bay - Torrecilli B. Torrecilli B appears on both the Clementine false color ratio and the USGS NIR false color ratio maps as a dark halo crater that excavates deeper mare materials from under an overburden. http://gallery.utahastronomy.com/main.php?g2_itemId=11515 But Torricellie B is at the north end of bay - towards the thin end of a plain covered with ejecta overburden. The craterlets on plain west of Torrecilli - shown on the GLAC map - http://gallery.utahastronomy.com/main.php?g2_itemId=11517 - and in a NIR closeup image of the vicinity around Torrecilli - http://gallery.utahastronomy.com/main.php?g2_itemId=11519 - appears to show that the craterlets are not piercing the full depth of the overburden. Torrecilli seems to have excavated down to a layer of dark materials seen in its smaller western half and on the flanks of its eastern wall. The ability to perceive a feature's true nature depends on resolution. Comparing my my low resoluion pic with the expert imagers, small craters next to hills visually merged together into smooth terrain - http://gallery.utahastronomy.com/main.php?g2_itemId=11507 http://lpod.org/coppermine/displayimage.php?pos=-1126 http://www.lpod.org/?m=20071006 In this sense, my image is not "true" image - a good representation of the surface terrain. The expert imagers show a relatively smooth terrain south of Torricelli and between Torricelli and the meas. But the two negative split image of the region south of Torricelli shown in LTO 78B3 - http://gallery.utahastronomy.com/main.php?g2_itemId=11521 - is as to the expert image pics as their pics are to mine. In LTO 78B3, the "smooth" plain in the expert imager pics becomes a tortured rough surface. However, in LTO78B3 - looking at the original whole map - it is evident that two photographs of differing resolution have been merged together - with a seam line running at the end of the thick Theophilus ejecta melt. The rough terrain in the south end of LTO78B3 appears to continue north to Torricelli. http://www.lpi.usra.edu/resources/mapcatalog/LTO/lto78b3_1/ How a terrain is perceived and interperted heavily depends on resolution. - Kurt

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Re: [Utah-astronomy] Radio Astronomy Question
by John R. Peterson 14 Jun '08

14 Jun '08

>To: Utah Astronomy >Subject: Re: [Utah-astronomy] Radio Astronomy Question >I wouldn't be too harsh on the creators of "Contact". They did after all hire Carl Sagan to help them >get the science at least close to right, though I doubt Carl had final review on screenplay. Let's not forget that Carl Sagan wrote the novel from which the movie was created. As much as I like the movie, the novel is far superior, as usual. While we're on it, all em astronomy outside of the visible region depends upon false color images. With low frequency radio waves, there's no reason that we shouldn't use another one of our sensory organs (i.e., our ears)and make "false pitch" sound waves. The hum one hears near an electric power station really starts as 60 Hz em waves, doesn't it? It seems to me that in the last few years I've read of "sound" propagating through the interstellar medium due to supernovae. If we can turn the infra-audible talking of whales or elephants, or even the cables of the Golden Gate Bridge, into something we can hear, why not do the same with stars? John R. Peterson

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Re: [Utah-astronomy] Ealing - Astro-physics Model 8002 drive controller
by Canopus56 13 Jun '08

13 Jun '08

> Due to the non-digital, resistor-capacitor design of this old system, it > requires adjustment to achieve a precise 60hz fequency. You turn the > adjustment knob until the light stays on continuously (or is off > continuously). You then supposedly have an accurrate 60 hz and > precise sideral rate. It's worth checking periodically during the > night to see if the frequency has changed due to a temperature change. Thanks, Chuck! That explains my weird tracking error test result last night: http://gallery.utahastronomy.com/main.php?g2_itemId=11527 Have to try that one again and see if it improves things. That also may be a source for targeting error in the Skywizard. > until the light stays on continuously (or is off > continuously). No ambiguous signal there. -:) Which is it? > You'll have to ask Bruce or Patrick if SLAS still has the > autoguider for the Ealing corrector. Patrick, does SLAS have the autoguider? Thanks again, Kurt

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Ealing - Astro-physics Model 8002 drive controller
by Canopus56 13 Jun '08

13 Jun '08

Can someone get me the heads up on how the Ealing's Astro-physics Model 8002 drive controller is intended to be used. While the toggle options "sidereal", "lunar" and "solar" are self explanatory, there is another mode "calibration". There is a calibration knob. Then there are two sets of switches to the right labeled "right ascension" and "declination", each with a setting "auto" and "manual". I assume the "auto" and "manual" options means one drive is slaved to the other? The "calibration" mode is less clear. Thanks - Kurt

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back again
by Chuck Hards 13 Jun '08

13 Jun '08

I've managed to get my shorts un-twisted so I turned my list mail back on. There's no way to keep people from talking about politics & 40-year-old grudges, so my best bet is to just delete those posts unread. I enjoy all of your company too much to stay away for long, anyway.

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Seeking Deloy Pierce
by Patrick Wiggins 13 Jun '08

13 Jun '08

Paul Welch Deloy's brother-in-law, is trying to find Deloy. If you know how to contact Deloy please contact Paul Welch at 801.290.1868 or pwelch(a)westech-inc.com. patrick

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Re: [Utah-astronomy] Radio Astronomy Question
by erikhansen＠TheBlueZone.net 13 Jun '08

13 Jun '08

> Of course the SETI people do not really know in what form a "communication" would come. Search the "Wow Signal" Erik >>To: Utah Astronomy >>Subject: Re: [Utah-astronomy] Radio Astronomy Question >>I wouldn't be too harsh on the creators of "Contact". They did after all >> hire Carl Sagan to help them >get the science at least close to right, >> though I doubt Carl had final review on screenplay. > > Let's not forget that Carl Sagan wrote the novel from which the movie was > created. As much as I like the movie, the novel is far superior, as usual. > While we're on it, all em astronomy outside of the visible region depends > upon false color images. With low frequency radio waves, there's no reason > that we shouldn't use another one of our sensory organs (i.e., our > ears)and make "false pitch" sound waves. The hum one hears near an > electric power station really starts as 60 Hz em waves, doesn't it? It > seems to me that in the last few years I've read of "sound" propagating > through the interstellar medium due to supernovae. If we can turn the > infra-audible talking of whales or elephants, or even the cables of the > Golden Gate Bridge, into something we can hear, why not do the same with > stars? > John R. Peterson > > _______________________________________________ > Utah-Astronomy mailing list > Utah-Astronomy(a)mailman.xmission.com > http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy > Visit the Photo Gallery: http://gallery.utahastronomy.com > Visit the Wiki: http://www.utahastronomy.com >

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Re: [Utah-astronomy] Radio Astronomy Question
by Daren Campbell 13 Jun '08

13 Jun '08

Thank you for all of your comments. You've been a great help in answering my question. Daren Campbell Tri-Co Realty & Investment Co. Ph. 801-571-8833 Fax 801-571-9888 -----Original Message----- From: utah-astronomy-bounces(a)mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of utah-astronomy-request(a)mailman.xmission.com Sent: Thursday, June 12, 2008 7:10 PM To: utah-astronomy(a)mailman.xmission.com Subject: Utah-Astronomy Digest, Vol 64, Issue 21 Send Utah-Astronomy mailing list submissions to utah-astronomy(a)mailman.xmission.com To subscribe or unsubscribe via the World Wide Web, visit http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy or, via email, send a message with subject or body 'help' to utah-astronomy-request(a)mailman.xmission.com You can reach the person managing the list at utah-astronomy-owner(a)mailman.xmission.com When replying, please edit your Subject line so it is more specific than "Re: Contents of Utah-Astronomy digest..." Today's Topics: 1. Re: Radio Astronomy Question (Canopus56) 2. Ealing double ep search and targeting setup (Canopus56) 3. Torricelli and Sinus Asperitatis - Ealing 20080608 (Canopus56) ---------------------------------------------------------------------- Message: 1 Date: Thu, 12 Jun 2008 16:31:12 -0700 (PDT) From: Canopus56 <canopus56(a)yahoo.com> Subject: Re: [Utah-astronomy] Radio Astronomy Question To: Utah Astronomy List Serv <utah-astronomy(a)mailman.xmission.com> Message-ID: <961834.75305.qm(a)web32604.mail.mud.yahoo.com> Content-Type: text/plain; charset=us-ascii Darren, Light received at all wavelengths, whether at the visible or radio wavelengths, is turned into two and three dimensional maps. Probably the best summary map at visual and radio wavelengths is NASA's Mulitwavelength Poster of the Milky Way http://mwmw.gsfc.nasa.gov/mwpics/mwmw_8x10.jpg (2.5megs) in http://mwmw.gsfc.nasa.gov/mmw_product.html#viewgraph Probably the three most famous radio maps are Dames' 1987 CO map of the Milky Way, based on radio emissions, the key points of which I have reproduced here: http://members.csolutions.net/fisherka/astronote/Clarkxref/vrml/refer_MWMW_R ef.htm Oort's 1956 radio emission map of CO clouds that first sketched the arms of the Milky Way - http://articles.adsabs.harvard.edu//full/seri/MNRAS/0118//0999999P006.html and the Wilkinson Microwave Anisotropy of the cosmic microwave background radiation - http://map.gsfc.nasa.gov/ These maps are based on pointing a radio telescope at a particular point in the sky and noting the intensity and frequency of the signal. You can in princple listen to changes in tone or frequency, but it is boring. Generally, the intensity and frequency of the tone is recorded and is turned in a 1D graph or 2D map. Here's an example of a radio burst audio recording from synchrotronic radiation from Jupiter: http://radiojove.gsfc.nasa.gov/observing/samples/lbursts1.wav in http://radiojove.gsfc.nasa.gov/observing/sample_data.htm You can listen to it, but usually the audio is recorded and data viewed graphically as shown here - http://radiojove.gsfc.nasa.gov/observing/sample_data.htm Radio meteor listening is another example. Radio meteors can be listened to. They sound like this: http://science.nasa.gov/audio/sporadic.wav http://science.nasa.gov/spaceweather/meteors/audio/geminidecho.wav in http://www.spaceweather.com/glossary/forwardscatter.html But amateur and professional radio meteor observers tend to just record several hours and then look at the sounds graphically. That takes less time to scan visual and the graph gives more clues about the meteor burning up: http://www.spaceweather.com/glossary/images/sporadic_dynspec.gif in http://www.spaceweather.com/glossary/forwardscatter.html - Kurt P.S. - Probably the newest and coolest non-visual big map is the Spitzer Space Telescope improved resolution map of the Milky Way in infra-red. The map is hot off the press and was just released on June 3. http://www.spitzer.caltech.edu/Media/releases/ssc2008-11/visuals.shtml ------------------------------ Message: 2 Date: Thu, 12 Jun 2008 17:31:07 -0700 (PDT) From: Canopus56 <canopus56(a)yahoo.com> Subject: [Utah-astronomy] Ealing double ep search and targeting setup To: Utah Astronomy List Serv <utah-astronomy(a)mailman.xmission.com> Message-ID: <166342.1678.qm(a)web32607.mail.mud.yahoo.com> Content-Type: text/plain; charset=us-ascii I. Double ep search and targeting setup Last Sunday (6/8 - 6/9), I tested a double eyepiece search and targeting setup on the Ealing for visual observing. A flip mirror and right angle was used to provide a search ep at 52mm (32' TFOV) and an observing ep at 25mm (15' TFOV) with the option of rotating in DSO filters on the observing ep. This setup may be of interest for Ealing star party operators. Double targeting setup - photo http://gallery.utahastronomy.com/main.php?g2_itemId=11501 Double targeting setup - component schematic http://gallery.utahastronomy.com/main.php?g2_itemId=11503 The default SLAS 32mm 2" ep provides a TFOV of 20'. This can be a dauntingly small TFOV for searching for and centering on targets. An alternative setup would be to use two sets of 2" eps on the flip mirror - 52mm search and 32mm-25mm 2" ep for observing. A second Lumicon T-2" adapter for that setup arrived in the mail after last Sunday. The following is rough layout of a dual 2" search and target setup. Double targeting setup - 2" variant http://gallery.utahastronomy.com/main.php?g2_itemId=11505 II. Targeting testing and focuser tube flop I also did some testing with a 12mm reticule ep (7' TFOV) to roughly characterize the targeting and tracking tolerances for the Ealing. I wanted to explore possible reasons the Ealing is so hard to target(IMHO and at least for me). Arcturus was transiting. Using the reticule ep, Arcturus was centered and all the finders were centered as precisely as possible (within 20'). Even with the best adjustments, there was a small offset between the ep centering and the Mak finder that had to be memorized. Then I executed a meridian swap and attempted to center the bright star in the ep using the telrads. The star was no where to be found. Increasing the TFOV by inserting progressively lower power eyepieces, Vega was found just outside the AFOV of the 52mm ep. Then I recentered Vega and recentered all the finders. A slew to M57 was performed without difficulty using the finders and the 52mm search ep. A second test was done by merdian swapping back to Arcturus. The same problem was found. After a long slew, the finders were no longer aligned to the target. A third test was done by slewing by to Alberio, recentering the finders and then star hopping to beta Sct and then on to M27. After recentering on Alberio, the slew to M27 was done without any difficulty and was particularly satisfying. In the 15' TFOV observing ep, M27 crisply slewed into view and filled the entire ep AFOV. The amount of finder error after a meridian swap was roughly measured during the test described above. The bright star would be centered in the 12mm reticule and then the corresponding index error in the telrads and Mak finder noted. In general the index error was between 1/2 deg (30') and 3/4 deg (45'). This performance characteristic explained to me why the Ealing finders always seem to be out seriously of the alignment when the scope is first started up and why the scope is always hard to target. Using a 32mm ep with a TFOV of 20', swapping the scope and trying to align on based on the finders can result in being off the target by two or three ep fields or one to one and one-half fields using a 52mm ep with a 31' TFOV. I looked for the cause of the finder index error. I listened for mirror flop during a swap and tracked through the ep while moving the scope across the transit line. No significant swap was found. Finder flop was discounted. The error was seen in ridgedly fixed telrads and in rigid ring secured finders. The source of the problem appeared to be the well-known Ealing's focuser tube flop. When the scope is on one side of the meridian, the focuser tube is leaning to one side. Moving the scope, even on the same side of the meridian but across large 50 degree declination sweeps, causes the focuser tube to lean to one side, causing the apparent misaligning of the focusers. Armed with this knowledge, I tested the principle on M11 and M26. I always slewed to a nearby bright star and recentered all the finders. Then right angle slewing to a target supplemented by the Mak finder worked as expected. Even so, search targeting with a 32mm ep had some level of difficulty. The wider field 52mm ep provided a good targeting bridge between the Mak finder and the small TFOVs of the observing eps at 32mm and lower focal lengths. A fix for the tube flop might be to invest and upgrade the aged rack and pinon focuser on the Ealing with a modern, more stout, Crayford focuser. A Moonlight Crayford focuser illustrates one of many possibilities. JMI NGF Focuser http://www.jimsmobile.com/buy_ngf.htm Moonlight 2.7" Crayford focuser http://www.focuser.com/cgi-bin/dman.cgi?page=productdetail&plugin=dstore.cgi &product=CFL Astophysics Focusers http://www.astro-physics.com/index.htm?products/accessories/focus_adap/focus _adap I located an Austin Texas astronomy club newsletter discussing that club's Ealing scope. They replaced their focuser with a JMI NSF model with a motorized focus control. The newsletter also indicated that they had an Astrophysics focuser and an automated JMI tracking control. Austin Texas newsletter https://webspace.utexas.edu/cannonea/www/aas/stnl/ST200212.pdf Although the Skywizard was not working on 6/8-6/9, in a prior session, I concluded the easiest way to use the Wizard in conjunction with bright stars on meridian flip was to just slew to one of the Skywizard named alignment bright stars. Regardless of whether the bright alignment star is in the eastern or western sky, just press "mode", "alignment" and align to the bright star. This dispenses with having to reference and enter the obscure Skywizard "ST" star numbers found in the Ealing Skywizard handbook. The take-away point is that due to focuser tube flop, best practices for targeting are: 1) Do a meridian flip 2) Bright alignment star center in smallest TFOV ep or with reticule 3) Realign all the finders to compensate for the focuser tube flop 4) Resync the Skywizard 5) Enter the DSO target into the Skywizard 6) Use the Skywizard right-angle slew indicator to move within 1 degree of the target 7) Search the 1 degree TFOV in the Mak; tune alignment 8) Search with the 1/2 degree TFOV 52mm ep 9) Finalize targeting with the 20'-15' observing ep III. Tracking testing and RA speed calibration Rough track testing for bright stars was done in various parts of the sky using the 12mm reticule ep. The Ealing tracking rate is variable depending on altitude. You can hear a changed escapement rate when the scope is about 65 degrees altitude. I followed the tracking rate error in the 12mm ep while centered on a transiting bright star and adjusted the sidereal rate calibration knob on the Ealing motor controller. Tracking error was minimized when in "sidereal mode", the calibration knob was set to its lowest setting - all the way to the left. However, the calibration knob did not have a sufficent slow range adjustment to minimize the tracking rate error. I do not know if there is a supplemental right ascension adjustment potentimeter on the back of the controller box. If so, Ealing tracking could be improved by centering the default right ascension rate so that the calibration knob is centered. That would give enough rate calibration adjustment so stars could be tracked with a minimized tracking error. The take-away point for Ealing operators is that the best tracking rate will usually be in sidereal mode with the rate calibration knob turned all the way to the left. I did not have the time to quantify the tracking rate error with star drift imaging, but will attempt to do that in a future session. Regards - Kurt ------------------------------ Message: 3 Date: Thu, 12 Jun 2008 18:10:21 -0700 (PDT) From: Canopus56 <canopus56(a)yahoo.com> Subject: [Utah-astronomy] Torricelli and Sinus Asperitatis - Ealing 20080608 To: Utah Astronomy List Serv <utah-astronomy(a)mailman.xmission.com> Message-ID: <946124.92298.qm(a)web32601.mail.mud.yahoo.com> Content-Type: text/plain; charset=us-ascii Lunar image taken last weekend with the Ealing of crater Torricelli. Torricelli and Sinus Asperitatis - Processed http://gallery.utahastronomy.com/main.php?g2_itemId=11507 The image captures the unusual crater shadow of Torricelli cast by its failed western rim. Also shown: Trouvelt's cleft and Theophilus ejecta melt. Sinus Asperitatis means the "Bay of Roughness" Sinus Asperitatis is about 225km southeast of the Apollo 11 landing site. Other better pics by expert imagers: Trouvelot's Drawing 3-14-18?? of the cleft http://www.lpod.org/?m=20060729 Elias Chasiotis 11/10/2006 Torricelli http://lpod.org/coppermine/displayimage.php?pos=-1126 Riccardo Cosenz 1/10/2007 Sinus Asperitatis http://www.lpod.org/?m=20071006 LPOD wiki entry for Torricelli http://the-moon.wikispaces.com/Torricelli I also prepared some "science-ee" reference images that tells the geologic story of the region. See Wood's _Modern Moon" at page 113. Torricelli and Sinus Asperitatis - Clementine regional base map http://gallery.utahastronomy.com/main.php?g2_itemId=11511 Torricelli and Sinus Asperitatis - LAC78 excerpt http://gallery.utahastronomy.com/main.php?g2_itemId=11513 Torricelli and Sinus Asperitatis - USGS Clementine False Color and NIR base maps http://gallery.utahastronomy.com/main.php?g2_itemId=11515 Torricelli and Sinus Asperitatis - Geologic Lunar Map I546 http://gallery.utahastronomy.com/main.php?g2_itemId=11517 Torricelli - USGS Clementine NIR close up http://gallery.utahastronomy.com/main.php?g2_itemId=11519 Torricelli and Sinus Asperitatis - LTO 78B3 excerpt http://gallery.utahastronomy.com/main.php?g2_itemId=11521 Torricelli - Apollo 16 panorama camera - AS16-P-4525 http://gallery.utahastronomy.com/main.php?g2_itemId=11523 Torricelli and Sinus Asperitatis - GLRG domes in region http://gallery.utahastronomy.com/main.php?g2_itemId=11525 Torricelli and Sinus Asperitatis - Rectified http://gallery.utahastronomy.com/main.php?g2_itemId=11509 Peace - Kurt ------------------------------ _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy(a)mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.utahastronomy.com End of Utah-Astronomy Digest, Vol 64, Issue 21 **********************************************

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