New Names for Mercury features |
New Names for Mercury features |
Apr 10 2008, 05:39 PM
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#1
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
This is just the first of what will presumably be many new sets of names for features on Mercury produced by MESSENGER's imaging:
QUOTE Twelve New Names and a New Theme for Fossae Approved for Use on Mercury The following new names have been approved by the IAU for use on Mercury. Craters: Apollodorus, Atget, Cunningham, Eminescu, Kertész, Neruda, Raditladi, Sander, Sveinsdóttir, Xiao Zhao Rupes: Beagle Rupes Fossae: Pantheon Fossae The newly approved theme for fossae on Mercury is "Significant works of architecture." Beagle Rupes is the big curvy rupes near the western terminator on the outbound images. Pantheon Fossae is the "spider." Apollodorus is the crater that sits on the spider. Anyone care to try your hand at mapping out the locations of the other craters? They all seem to be on the outbound images, no surprise there. Name Lat Lon Diameter Raditladi 27.28 240.93 257 Xiao Zhao 10.64 236.21 23 Atget 25.65 193.93 100 Sander 42.59 205.6 50 Apollodorus 30.58 197.01 41 Sveinsdóttir -2.58 259.96 220 Eminescu 10.79 245.87 125 Cunningham 30.48 203.07 37 Kertész 27.44 214.06 33 Neruda -52.47 234.55 110 --Emily -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Apr 10 2008, 09:46 PM
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#2
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Senior Member Group: Members Posts: 1583 Joined: 14-October 05 From: Vermont Member No.: 530 |
I was wondering what Jason was talking about with Beagle Rupes. Although with the Mercury theme I expected Beatles Rupes.
Applldorus and Pantheon... nearby? |
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Apr 17 2008, 05:57 PM
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#3
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Senior Member Group: Members Posts: 1639 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
On a somewhat related note, I recently posted some Mercury mapping updates. These include more color imagery from Messenger and earlier radar data from Arecibo Observatory. Details are in the caption...
http://laps.noaa.gov/albers/sos/sos.html#MERCURY Steve |
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Apr 17 2008, 07:35 PM
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#4
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Anyone care to try your hand at mapping out the locations of the other craters? They all seem to be on the outbound images, no surprise there. Here ya go: -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Apr 17 2008, 09:13 PM
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#5
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Solar System Cartographer Group: Members Posts: 10166 Joined: 5-April 05 From: Canada Member No.: 227 |
... and a nice new image on the Messenger site:
http://messenger.jhuapl.edu/gallery/scienc...0108828468M.jpg Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PD: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Apr 18 2008, 01:08 AM
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#6
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Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Wow, I'll say!!! The central peak complex of that large terraced crater is just wild.
-------------------- 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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Apr 21 2008, 05:18 PM
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#7
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Here ya go: You're the man, Jason, thanks. I asked some APL folks if they had a map and no one seemed to have one to send, or know where the craters were! Maybe I'll send them your map. --Emily -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Apr 21 2008, 05:32 PM
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#8
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Senior Member Group: Members Posts: 1639 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
Wow, I'll say!!! The central peak complex of that large terraced crater is just wild. I believe that is Eminescu - nicely labeled on Jason's new map. -------------------- Steve [ my home page and planetary maps page ]
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Apr 21 2008, 07:45 PM
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#9
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Member Group: Members Posts: 655 Joined: 22-January 06 Member No.: 655 |
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Apr 21 2008, 09:41 PM
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#10
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Senior Member Group: Members Posts: 1229 Joined: 24-December 05 From: The blue one in between the yellow and red ones. Member No.: 618 |
I was wondering when somebody would mention those "secondary crater chains". I would like to see the textbook that depicts them. I find it hard to imagine that a series of ejecta blocks from the large crater would land one-after-another along those nearly-perfectly linear tracks, without at least an occasional block landing to one side or the other of the line. That's what I always see in the textbook chains on the Moon or elsewhere, but not here around "Eminescu".
These particular chains are impossibly continuous and co-linear to be formed by flying ejecta blocks. They are primarily radial to Eminescu but not always. I am prepared to wager that they comprise series of sinkholes formed above linear fractures in an underlying basement rock. The fractures would have formed as a result of the Eminescu impact, but the sinkholes would represent a later modification, as deposited regolith sifted down into the cracks. I don't think I have ever seen this kind of pattern on the Moon or other planets, and wonder if it is unique here. It implies a pretty remarkable substructure to the Mercurean crust. I can't believe no one else has commented on this. Emily? -------------------- My Grandpa goes to Mars every day and all I get are these lousy T-shirts!
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Apr 21 2008, 11:30 PM
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#11
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Solar System Cartographer Group: Members Posts: 10166 Joined: 5-April 05 From: Canada Member No.: 227 |
Secondary cratering has been understood very well since the pioneering work by Gene Shoemaker in 1960 or so. The curtain of ejecta breaks up into debris strands, not always radial because some are produced by in flight breakup of rotating blocks. We see it around terrestrial explosion craters, lunar craters, Mars craters... and it is better expressed on Mercury because the higher gravity compared with the moon brings the debris down closer to the primary so there's less time for it to spread out and become irregular in appearance. Radial cracks are all but unheard of around impact craters.
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PD: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Apr 22 2008, 08:58 AM
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#12
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Member Group: Members Posts: 655 Joined: 22-January 06 Member No.: 655 |
I was wondering when somebody would mention those "secondary crater chains". I would like to see the textbook that depicts them. Try 'Planetary Geology' by Guest/Butterworth/Murray/O'Donnell 1979 edition Page 22 with 4 photographs on the facing page - very informative. |
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Apr 22 2008, 09:06 PM
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#13
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Senior Member Group: Members Posts: 1229 Joined: 24-December 05 From: The blue one in between the yellow and red ones. Member No.: 618 |
Thanks for the pointer. I'll try to find it. Astonishing is all I can say, that a series of ballistic ejecta trajectories can produce craters like beads on a string.
Do the hydrocode models of big impacts produce patterns like this? Incredible. -------------------- My Grandpa goes to Mars every day and all I get are these lousy T-shirts!
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Apr 23 2008, 04:52 AM
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#14
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Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
The crater chains are odd and cool, but I'm still obsssed with the albedo variations around the central peaks of Eminescu; is the crust much more chemically differentiated then previously thought?
Come to that, some of the crater chain patterns seem to perhaps imply activity post-formation. I wonder how deep beneath the outer crust Mercury's magma might really be? Might be very hard to tell; the place has been slammed continuously since its formation, but it's thick-skinned enough to retain prima facie very ancient impact features. Eminescu doesn't look all that old to me, though, especially in comparison to its presumably associated secondary impact chains. -------------------- 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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May 4 2008, 08:23 PM
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#15
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
Here are a couple of false color and natural-ish wide-angle color overlays over the higher resolution NAC image of Eminescu:
-------------------- |
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May 4 2008, 10:30 PM
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#16
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Senior Member Group: Members Posts: 1870 Joined: 20-February 05 Member No.: 174 |
I've uploaded a segment extracted from my enhancement of the departure hemisphere color mosaic
Eminescu is a "middle aged" (sort of equivalent to Eartosthenian, on the Moon) crater with no particularly distinctive color/albedo patterns OTHER than the features surrounding the central peak-ring. The rim and outer floor of Eminescu are a little "yellower" in the enhancement than most of the surrounding cratered terrain, though the "blue" splattering from the young ray crater to the east, outside the high-rez frame, is an overlay of somewhat masking color-noise. In the general vicinity, crater floor and intercrater plains seem "yellower" than the old crater rims and rugged intercrater terrain, giving the plains a generally neutral color in this enhancement. To the northeast, outside the high-rez frame, some crater walls and patches on the plains have an interesting "pink" color that may be distinctive material (this area was missed by the ejecta). A large degraded crater almost as big as Eminescu, just south of the bright "blue" ray crater, seems to have an unusual "dark blue" central peak, but higher resolution data would be needed to confirm this is real. Another crater in the south part of the enhanced low-rez image has a "pink" central peak, again needing confirmation as a real feature. Patches of a "dark purple-blue" terrain appear near the south east corner of the low-rez frame and extend further south out of the cropped frame and appear to be a patchy regional unit in the rugged highlands there. But in general, beside near-terminator noise in the color data, the area around Eminescu (within about 3 crater diameters of it's rim) is largely devoid of prominant color variations. This makes the intense "blue" color of the bright materal in and around the central peaks extremely distinctive. The data suggests also that the dark patches on the crater floor that immediately surround the bright "blue" areas are also strongly "blue" colored. Higher resolution would help confirm this. A few other craters share this feature: most prominant is the impact basin with a prominent central ring that's to the north of Eminescu. Some of the impact craters within Caloris also have bright, bluish floors and maybe central peaks. One fairly young crater with weak ejecta rays well to the south of Eminescu also has a somewhat bright and blue central peak area. But overall, these features are very uncommon. "Curiouser and curiouser" said Alice" |
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Feb 26 2012, 04:18 PM
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#17
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Senior Member Group: Members Posts: 1639 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
Here's a map with feature names, some of the new and some of the old ones, using a size threshold of 125km.
Full resolution: http://laps.noaa.gov/albers/sos/features/c...zero_center.png Steve -------------------- Steve [ my home page and planetary maps page ]
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Feb 28 2012, 10:21 PM
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#18
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Member Group: Members Posts: 146 Joined: 23-August 06 From: Vriezenveen, Netherlands Member No.: 1067 |
Steve, besides adding feature names to your maps, I was wondering if you are working on any updates?
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Feb 29 2012, 01:59 PM
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#19
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Solar System Cartographer Group: Members Posts: 10166 Joined: 5-April 05 From: Canada Member No.: 227 |
http://messenger.jhuapl.edu/gallery/scienc...mp;image_id=681
This is the most up to date map from MESSENGER. An updated version might be available in a week with the new PDS release. Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PD: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Mar 3 2012, 06:13 PM
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#20
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Senior Member Group: Members Posts: 1639 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
CAP-Team, for Mercury a simple idea might be to use the latest MESSENGER map as a background and overlay the global images I've been using that have the lower phase angle? Working directly with 100s of high-resolution images would be a large task for me. Otherwise we can talk about ideas for updating particular maps. Sometimes I can benefit from a little coaching.
For the time being here are the features put on top of the MESSENGER map Phil linked to: Higher Resolution (4K): http://laps.noaa.gov/albers/sos/features/c...zero_center.png Steve -------------------- Steve [ my home page and planetary maps page ]
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May 6 2013, 01:35 PM
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#21
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Member Group: Members Posts: 241 Joined: 16-May 06 From: Geneva, Switzerland Member No.: 773 |
Some changes in Mercury nomenclature and new names. Previous Valles became Catenae and valleys (formed due to mechanical and thermal erosion of Mercury's surface by hot, low-viscosity, quickly-flowing lavas) have been named according to the theme of "abandoned cities (and towns and settlements) of antiquity" .
http://messenger.jhuapl.edu/gallery/scienc...p;image_id=1161 Regards, Marc |
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May 8 2013, 11:59 AM
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#22
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Forum Contributor Group: Members Posts: 1372 Joined: 8-February 04 From: North East Florida, USA. Member No.: 11 |
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