My Assistant
| Posted on: Mar 27 2017, 09:47 AM | |
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
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| Forum: Cassini's ongoing mission and raw images · Post Preview: #235195 · Replies: 90 · Views: 163195 |
| Posted on: Mar 25 2017, 02:02 PM | |
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
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| Forum: Titan · Post Preview: #235165 · Replies: 166 · Views: 222433 |
| Posted on: Mar 14 2017, 06:04 PM | |||
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
Looking at the PDS data for this medium-range flyby of Atlas, I realized a number of frames at the start of the sequence were taken against the backdrop of Saturn's night-side. Thanks to the faint illumination of the cloud decks with ring-shine, an extreme contrast stretch of the images reveals the moon's equatorial bulge and southern hemisphere in profile. |
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| Forum: Cassini's ongoing mission and raw images · Post Preview: #235030 · Replies: 26 · Views: 47318 |
| Posted on: Mar 10 2017, 05:11 PM | |
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
As you say, Ian, north is to the upper right in the first view you posted, so the partially illuminated bulge at lower left is the southern hemisphere. The other views show the northern hemisphere, not the southern. Pan has the same seasons as Saturn, and now the north is more fully illuminated. Thanks for the correction, Phil — I've gone back and corrected my posts with the correct info. |
| Forum: Cassini's ongoing mission and raw images · Post Preview: #234983 · Replies: 90 · Views: 163195 |
| Posted on: Mar 9 2017, 12:55 PM | |
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
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| Forum: Cassini's ongoing mission and raw images · Post Preview: #234944 · Replies: 90 · Views: 163195 |
| Posted on: Mar 9 2017, 11:38 AM | |
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
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| Forum: Cassini's ongoing mission and raw images · Post Preview: #234943 · Replies: 90 · Views: 163195 |
| Posted on: Mar 9 2017, 11:36 AM | |
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
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| Forum: Cassini's ongoing mission and raw images · Post Preview: #234942 · Replies: 90 · Views: 163195 |
| Posted on: Jan 18 2017, 05:52 AM | |
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
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| Forum: Cassini's ongoing mission and raw images · Post Preview: #234187 · Replies: 90 · Views: 163195 |
| Posted on: Jan 6 2017, 01:06 PM | |
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
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| Forum: Cassini's ongoing mission and raw images · Post Preview: #234047 · Replies: 90 · Views: 163195 |
| Posted on: Jan 3 2017, 08:17 AM | |
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
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| Forum: Titan · Post Preview: #233978 · Replies: 166 · Views: 222433 |
| Posted on: Dec 30 2016, 04:58 AM | ||||
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
Refering to the circular feature: maybe impact should be considered too? This feature has intrigued me for some time, ever since I spied it on a medium range shot from 2013: Nicknaming it the 'Bullseye', I spotted it again on the VIMS mosaic taken during the T-114 flyby; this is a crop of an undistorted version of PIA20016: Finally, here is our region of interest with the topographic map (courtesy of Ralph Lorenz, et al) lain over the ISS basemap PIA20713: It would appear that the 'Bullseye' is possibly a depression, perhaps even an ancient impact crater that has degraded over time. It may also be analogous to Hotei Regio, which is suspected to be a dry lake bed, harking back to seasonal conditions that favored temperate latitudes. Who knows? |
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| Forum: Titan · Post Preview: #233945 · Replies: 166 · Views: 222433 |
| Posted on: Dec 28 2016, 04:06 AM | |
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
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| Forum: Titan · Post Preview: #233913 · Replies: 166 · Views: 222433 |
| Posted on: Dec 22 2016, 08:28 PM | |
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
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| Forum: Titan · Post Preview: #233883 · Replies: 166 · Views: 222433 |
| Posted on: Dec 6 2016, 01:38 PM | |
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
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| Forum: Cassini's ongoing mission and raw images · Post Preview: #233626 · Replies: 90 · Views: 163195 |
| Posted on: Dec 5 2016, 10:54 PM | |
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
Cassini got a good look at Enceladus just a couple of days before embarking on the ring-dive orbits: ![]() 2016-11-27 --- ENCELADUS QUATRO UNCROPPED ![]() 2016-11-27 --- ENCELADUS QUATRO |
| Forum: Cassini's ongoing mission and raw images · Post Preview: #233618 · Replies: 90 · Views: 163195 |
| Posted on: Nov 14 2016, 05:27 AM | |
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
The Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS), is a new instrument designed by Princeton to observe exoplanets, and works in conjunction with the Subaru Telescope in Hawaii. It has also returned a quite astonishing image of Neptune: http://www.universetoday.com/131903/prince...d-nearby-stars/ ![]() |
| Forum: Uranus and Neptune · Post Preview: #233395 · Replies: 81 · Views: 234185 |
| Posted on: Nov 13 2016, 05:23 AM | ||
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
Tethys from 367,700 kilometers (228,500 miles), in an image produced with NAC images filtered through IR, Green, Clear, and UV. For comparison, here is Jason's Celestia preview screengrab: http://www.ciclops.org/media/me/2016/8436_20209_1.jpg |
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| Forum: Cassini's ongoing mission and raw images · Post Preview: #233390 · Replies: 0 · Views: 3247 |
| Posted on: Nov 13 2016, 05:18 AM | |
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
Is there a published map showing the names of bays and headlands in Titan's lakes and seas? If so I've missed it so far. There is indeed such a map, courtesy of the USGS: http://planetarynames.wr.usgs.gov/images/t...rthpole_new.pdf A full set of maps can be found here: http://planetarynames.wr.usgs.gov/Page/TITAN/target |
| Forum: Titan · Post Preview: #233389 · Replies: 166 · Views: 222433 |
| Posted on: Nov 5 2016, 12:15 AM | |
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
Way to totally trump me, Jason! |
| Forum: Titan · Post Preview: #233326 · Replies: 166 · Views: 222433 |
| Posted on: Nov 4 2016, 04:30 PM | |||
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
I've finished the mosaic (Hurrah!): https://www.amazon.co.uk/clouddrive/share/o...share_link_copy Only three moons are visible, as far as I'm able to ascertain: Epimetheus (just above the right ansa, near Saturn); and Atlas and Prometheus (at the tip of the right ansa). Pan is too faint to be detectable, and Janus must be just out of frame. |
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| Forum: Cassini's ongoing mission and raw images · Post Preview: #233319 · Replies: 9 · Views: 13540 |
| Posted on: Nov 3 2016, 10:31 AM | |
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
Nice discovery Phil, and sad news about Ewen Whitaker. How is the second edition of your Lunar Atlas coming along? |
| Forum: LRO & LCROSS · Post Preview: #233309 · Replies: 475 · Views: 747513 |
| Posted on: Nov 3 2016, 10:01 AM | |
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
Thanks fellas! And this is a stack of ten ratioed frames: ![]() 2016-10-30 Titan STACK of TEN |
| Forum: Titan · Post Preview: #233308 · Replies: 166 · Views: 222433 |
| Posted on: Nov 2 2016, 11:50 AM | |
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
I've processed 36 frames of Titan taken over a period of three hours; numerous clouds are seen forming and dissipating http://imgur.com/a/i5VS6 |
| Forum: Titan · Post Preview: #233287 · Replies: 166 · Views: 222433 |
| Posted on: Oct 31 2016, 09:01 PM | |
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
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| Forum: Cassini's ongoing mission and raw images · Post Preview: #233267 · Replies: 9 · Views: 13540 |
| Posted on: Oct 30 2016, 01:59 PM | ||
![]() Lord Of The Uranian Rings ![]() ![]() ![]() Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
Thanks Jase! Good question about the non-visibility of the rings draped by Saturn's shadow. Any infill light from reflected ringshine on the night side of the planet must indeed have *some* effect, but these compressed JPEGs effectively snuff out any such marginal signal, I reckon. Just to check, I stacked the four available raw frames for this footprint and got nada: |
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| Forum: Cassini's ongoing mission and raw images · Post Preview: #233246 · Replies: 9 · Views: 13540 |
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