Mars Comet Encounter Observations, C/2013 A1 Siding Spring, 19 Oct 2014 |
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Mars Comet Encounter Observations, C/2013 A1 Siding Spring, 19 Oct 2014 |
 Oct 20 2014, 03:17 PM
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#76
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Senior Member  Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780  |
QUOTE (fredk @ Oct 20 2014, 04:37 PM)  Here's a similar treatment (bandpass, stretch) on one of the MSL navcam frames. The pointing is not correct yet (the three navcam frames show the same pointing), so I don't know if this was meant to image SS or not (actually I think SS would have been higher than this frame shows). Nevertheless I'll post it in this thread. It shows some clouds near the horizon: One more version of the Sol 783 NRB, cleaned, and averaged with three different cleaned hipass (radius 50, 100, 200 pixels) versions:  |
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Oct 20 2014, 07:16 PM
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#77
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 Member Group: Members Posts: 691 Joined: 21-December 07 From: Clatskanie, Oregon Member No.: 3988 |
QUOTE (neo56 @ Oct 20 2014, 06:34 AM) My take at the MC34 mosaic taken at dawn. Noise was removed manually with GIMP for the surface (it was quite a long work) and with a filter for the sky. Lovely work Thomas on your version! In a sense, I love the noise since it's a challenge to sometimes remove completely, it toughens the image processing skills. 
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Oct 20 2014, 07:37 PM
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#78
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 Senior Member Group: Members Posts: 1465 Joined: 9-February 04 From: Columbus OH USA Member No.: 13 |
QUOTE (Gerald @ Oct 20 2014, 10:17 AM) One more version of the Sol 783 NRB Who knew Mars could be moody? -------------------- |
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Oct 20 2014, 09:44 PM
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#79
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 Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Sol 783 ChemCam images are down. I didn't see a comet in my first pass through them -- can any of you find it?
The Opportunity image has now been officially released. -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Oct 20 2014, 10:06 PM
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#80
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 Member Group: Members Posts: 796 Joined: 27-February 08 From: Heart of Europe Member No.: 4057 |
I tried to look if the Oppy's image shows Siding-Springs' tail but it probably doesn't.
But it shows coma on this denoised image.
Attached thumbnail(s)
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Oct 20 2014, 10:10 PM
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#81
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 Member Group: Members Posts: 102 Joined: 29-January 10 From: Poland Member No.: 5205 |
QUOTE (elakdawalla @ Oct 20 2014, 11:44 PM) Sol 783 ChemCam images are down. I didn't see a comet in my first pass through them -- can any of you find it? Why images have view to Az = 105 deg and El = 5 deg ? at this time ? Comet should be at elevation 50-54 deg and azimuth 300-310 deg ! -------------------- Adam Hurcewicz from Poland
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Oct 20 2014, 10:25 PM
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#82
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 Merciless Robot Group: Admin Posts: 8783 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Shooting from the hip, I'd guess that az/el is referenced to the camera's boresight with respect to the rover & not Martian true north or the horizon...?
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Oct 20 2014, 10:35 PM
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#83
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 Senior Member Group: Members Posts: 4247 Joined: 17-January 05 Member No.: 152 |
We've seen temporary incorrect coordinates before. They'll hopefully be updated soon.
I see no sign of a tail in the release images, but maybe a hint of elongation away from the sun. |
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Oct 20 2014, 11:55 PM
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#84
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 Senior Member Group: Members Posts: 2085 Joined: 13-February 10 From: Ontario Member No.: 5221 |
What we've all been waiting for:
http://www.uahirise.org/releases/siding-spring/ The small size gives the 'comets start out bright and turn black with time' hypothesis some validity. From pristine snowball to a lump of coal (though not this one; probably never coming back again after perihelion?) |
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Oct 20 2014, 11:56 PM
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#85
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 Senior Member Group: Moderator Posts: 3431 Joined: 11-August 04 From: USA Member No.: 98 |
QUOTE (elakdawalla @ Oct 20 2014, 02:44 PM) Sol 783 ChemCam images are down. I didn't see a comet in my first pass through them -- can any of you find it? Was that it? I guess it must have been. Here they are in context. Several minutes between images.
Attached thumbnail(s)
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Oct 21 2014, 01:01 AM
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#86
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Senior Member Group: Members Posts: 4247 Joined: 17-January 05 Member No.: 152 |
Accoding to Edgar:
QUOTE Curiosity successfully observed the comet with Mastcam, Navcam and ChemCam RMI. Not clear if that simply means the images were taken, or if it means that in (some of) the images the comet was visible. There doesn't seem to be any sign of the comet in the jpegs of the navcam or chemcam images downlinked yet. |
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Oct 21 2014, 01:49 AM
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#87
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 Senior Member Group: Members Posts: 3419 Joined: 9-February 04 From: Minneapolis, MN, USA Member No.: 15 |
HiRISE got it.
HiRISE Images of Comet C/2013 A1 Siding-Spring -the other Doug (With my shield, not yet upon it) ps -- and now I see I was scooped by two hours. Sigh. Gotta get off these painkillers, dammit... -------------------- “The trouble ain't that there is too many fools, but that the lightning ain't distributed right.” -Mark Twain
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Oct 21 2014, 01:57 AM
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#88
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Senior Member Group: Members Posts: 2085 Joined: 13-February 10 From: Ontario Member No.: 5221 |
It's alright Doug! I wasn't particularly coherent myself after a wisdom tooth got pulled...
 So in terms of image data, all that's left for release is from Mars Express, correct? All the spectra, dust flux, and other non-imagery results from other spacecraft will be at the December conference? |
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Oct 21 2014, 02:00 AM
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#89
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Senior Member Group: Members Posts: 3419 Joined: 9-February 04 From: Minneapolis, MN, USA Member No.: 15 |
Wasn't MOD looking for shooting stars in Mars' night atmosphere? I haven't seen anything from that, yet, either. (Of course, the raw jpegs might not show a whole lot on this, it might take some real heavy image processing to find those.)
-the other Doug (With my shield, not yet upon it) -------------------- “The trouble ain't that there is too many fools, but that the lightning ain't distributed right.” -Mark Twain
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Oct 21 2014, 08:54 AM
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#90
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 Senior Member Group: Members Posts: 1088 Joined: 19-February 05 From: Close to Meudon Observatory in France Member No.: 172 |
QUOTE (fredk @ Oct 21 2014, 03:01 AM) Accoding to Edgar: Not clear if that simply means the images were taken, or if it means that in (some of) the images the comet was visible. There doesn't seem to be any sign of the comet in the jpegs of the navcam or chemcam images downlinked yet. Agree with you. When I saw the Navcams taken Sol 783 at late evening, my 1st reaction was : it was a foggy night ! Maybe some fog was there over Gale crater. My Viking experience tells me that when there is fog over you on Mars, there is little chance to see any moons or stars in the night sky. We had some nighttime Phobos imaging experiments done in 1977 showing this... |
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