Voyager and Galileo Images of Callisto, The Callisto images and mosaics thread |
Voyager and Galileo Images of Callisto, The Callisto images and mosaics thread |
Mar 11 2007, 02:46 PM
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#1
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Member Group: Members Posts: 121 Joined: 26-September 05 From: Philadelphia Member No.: 507 |
When looking for good global images of Callisto
i keep seeing the same 2 or 3 and they look false color (especially from voyager). does callisto suffer from the lack of global images as europa does? also wondering if any of you magicians have worked your magic on any callisto images that are not in the mainstream.
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Mar 11 2007, 05:28 PM
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#2
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Senior Member Group: Members Posts: 1276 Joined: 25-November 04 Member No.: 114 |
How about this?
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Mar 11 2007, 07:59 PM
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#3
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
Well, there is this shot from Voyager:
Here is a Galileo shot (The only global view, other than a very distant one). Here is another Galileo shot, processed by me. -------------------- |
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Mar 11 2007, 11:15 PM
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#4
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Nice as usual, Ted. When was that second Galileo one taken?
--Emily -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Mar 12 2007, 12:13 AM
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#5
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
The one I processed is from I31 (with Voyager color). The Galileo photojournal image is from C30.
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Mar 12 2007, 12:53 AM
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#6
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Member Group: Members Posts: 121 Joined: 26-September 05 From: Philadelphia Member No.: 507 |
yeah, that half phase one is something i have never seen before. it reminds me of your europa and ganymede half phase images. io would make a nice complete set!
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Mar 12 2007, 12:56 AM
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#7
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Member Group: Members Posts: 121 Joined: 26-September 05 From: Philadelphia Member No.: 507 |
Here is a Galileo shot (The only global view, other than a very distant one).
that's the one i see all the time. those colors are whack i guess there was missing info in that which makes the edges blue? seems like the same problem with the more well-known europa images too. -------------------- |
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Mar 12 2007, 02:44 AM
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#8
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
Here is a Galileo shot (The only global view, other than a very distant one). that's the one i see all the time. those colors are whack i guess there was missing info in that which makes the edges blue? seems like the same problem with the more well-known europa images too. It is based on a real variation. It is just over-enhanced, and probably Violet-Green-Infrared color. -------------------- |
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Mar 12 2007, 02:50 AM
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#9
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
It's kind of amusing how similar in appearance Mercury and Callisto are, besides being virtually identical in size. But what a difference otherwise.
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Mar 13 2007, 12:38 PM
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#10
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
I have done my own version of the C30 image. It turns out the "red" channel is IR-9680, so my "red" for doing the color here is a blend of the green channel and IR-9680, to try to approximate red. For the grayscale, I used the IR-9680 data more heavily, as the dataset, like most Galileo sets, is very limited, so I needed it to bolster the image clarity. This is at the original image scale. The quality of the original images is too poor of super-resolution (in fact, it was hard to make it look decent without shrinking it).
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Jun 3 2007, 08:40 PM
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#11
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Member Group: Members Posts: 172 Joined: 17-March 06 Member No.: 709 |
Great work on the Callisto global views!
Now a request for the UMSF photo-magicians -- Have you assembled mosaics from the High Resolution close-up images of Callisto from Galileo? Another Phil |
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May 29 2019, 08:30 PM
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#12
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Member Group: Members Posts: 241 Joined: 16-May 06 From: Geneva, Switzerland Member No.: 773 |
A long time ago, I was used to visit the Callisto Crater Database by LPI: https://www.lpi.usra.edu/resources/cc/cchome.html. It contains images and information about the 150 major impact craters on Callisto. A similar database about craters on Ganymede also exists: https://www.lpi.usra.edu/resources/gc/gchome.html.
To my surprise, both are still accessible (as well as a third database about Venusian craters). As a biological database curator, I'm aware that maintaining and updating such databases is a big work, but I think it is a pity that they have never been updated with Galileo data. Many pics, new names and other information could have been added. Is there any chance this could happen once in the future ? Regards, Marc. |
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Jan 4 2021, 04:58 AM
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#13
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
I realize that this is a semiquaver off the title of this dormant thread, but I was looking over the plans for Europa Clipper and JUICE to see what coverage Callisto would receive and the numbers being reported are a total of 21 flybys: 9 by Europa Clipper and 12 by JUICE. This is almost half the number that Europa will receive from the two missions, so Callisto coverage will be quite good. Moreover, as the functional role of the flybys is to receive a gravity assist, they should be quite close as well, although perhaps the geometry (and diversity of flyby geometries) may not be so good, for the same reason.
Sadly, Callisto was on the far side of Jupiter when New Horizons made its flyby, and Juno doesn't have any plans to take any close images, nor did Cassini, so we're looking at an interval of almost 30 years between the last closeups from the Galileo Orbiter and the next one. When the wait is over, however, the coverage of Callisto should be great. |
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