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New Eclipse, Phobos this time |
 Mar 8 2004, 09:05 AM
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Founder  Group: Chairman Posts: 14445 Joined: 8-February 04 Member No.: 1  |
   Doug |
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Mar 11 2004, 10:06 AM
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 Senior Member Group: Moderator Posts: 2262 Joined: 9-February 04 From: Melbourne - Oz Member No.: 16 |
And another, better this time
   JC. -------------------- |
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Mar 11 2004, 10:28 AM
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#3
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Founder Group: Chairman Posts: 14445 Joined: 8-February 04 Member No.: 1 |
Looks like they cant get pancam frames taken quick enough to do this properly
 None at the spirit site yet though Doug |
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Mar 11 2004, 10:34 AM
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#4
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 Junior Member Group: Members Posts: 95 Joined: 10-March 04 Member No.: 54 |
QUOTE (jamescanvin @ Mar 11 2004, 10:06 AM) And another, better this time Very nice! This rover really is a stargazer!
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Mar 11 2004, 10:44 AM
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#5
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Senior Member Group: Moderator Posts: 2262 Joined: 9-February 04 From: Melbourne - Oz Member No.: 16 |
QUOTE (djellison @ Mar 11 2004, 10:28 AM) Looks like they cant get pancam frames taken quick enough to do this properly Yes it would be nice to see a proper annular eclipse. Does anyone have any idea how common these eclipses are? I'm guessing were in an 'eclipse season' right now and they are not going to keep coming so often. JC. -------------------- |
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Mar 11 2004, 10:50 AM
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#6
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Founder Group: Chairman Posts: 14445 Joined: 8-February 04 Member No.: 1 |
I think it's only a 6 week eclipse season - but I imagine it might come around again before mission-end
Doug |
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Mar 11 2004, 02:07 PM
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#7
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 Senior Member Group: Members Posts: 1465 Joined: 9-February 04 From: Columbus OH USA Member No.: 13 |
The satellites are very nearly on the equator (inclinations of 1 and 1.7 degrees) so the eclipse seasons coincide with the equinoxes, when the sun crosses said equator. The equinox was last Friday.
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| Guest_cassioli_* |
 Mar 11 2004, 06:59 PM
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#8
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Guests |
QUOTE (jamescanvin @ Mar 11 2004, 10:44 AM) QUOTE (djellison @ Mar 11 2004, 10:28 AM) Looks like they cant get pancam frames taken quick enough to do this properly Yes it would be nice to see a proper annular eclipse. Does anyone have any idea how common these eclipses are? I'm guessing were in an 'eclipse season' right now and they are not going to keep coming so often. JC. I have a veeeery old Astronomy program (dated 1993!!!), which can easily calculates oppositions and conjunctions between every Solar System object. It's named Expert Astronomer, is a commercial program, and I payed around 20$ for it , but it's great.I made an approximate calculation of march Martian Deimos eclipses, and I obtained these results: (DATE time separation altitude) 2/mar/2004 9:33PM 37.2' 17 deg 4/mar/2004 3:54AM 19.1' 69 deg 9/mar/2004 5:20AM 53.0' 79 deg 10/mar/2004 11:42AM 1.2° 8 deg I used 1.95S , 5.53W coordinates for Opportunity position, but I think they are not enough accurate, as the graphical simulation of the eclipse... actually does not show an eclipse, but just a Sun-Deimos proximity. Where could I find a REALLY accurate Opportunity position? How can I know the exact date/time of already happened&photographed Martian eclipses? Luca P.S. Maybe AstronomyLabs, an old freeware program can also do this calculation, but actually I didn't try it ( I remember it could for Earth/Sun/Moon eclipses). |
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Mar 15 2004, 10:01 AM
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#9
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 Member Group: Members Posts: 809 Joined: 11-March 04 Member No.: 56 |
Nobody remarked on the following series of Phobos eclipse shots from the Pancam on Sol 47:
http://marsrovers.jpl.nasa.gov/gallery/all...MP2672R8M1.HTML http://marsrovers.jpl.nasa.gov/gallery/all...MP2672R8M1.HTML http://marsrovers.jpl.nasa.gov/gallery/all...MP2672R8M1.HTML http://marsrovers.jpl.nasa.gov/gallery/all...MP2672R8M1.HTML But they are very nice. |
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Mar 15 2004, 10:57 AM
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#10
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Senior Member Group: Moderator Posts: 2262 Joined: 9-February 04 From: Melbourne - Oz Member No.: 16 |
QUOTE (cassioli @ Mar 11 2004, 06:59 PM) How can I know the exact date/time of already happened&photographed Martian eclipses? A lot of infomation, including the time the picture was taken, is encoded in the image filenames. A useful little program for extracting this has been posted to this forum, see http://mer.rlproject.com/index.php?showtopic=109 JC. -------------------- |
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