Ceres High Altitude Mapping Orbit (HAMO), Late summer through fall 2015 |
Ceres High Altitude Mapping Orbit (HAMO), Late summer through fall 2015 |
Aug 17 2015, 01:42 AM
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Member Group: Members Posts: 544 Joined: 17-November 05 From: Oklahoma Member No.: 557 |
DAWN arrived in its new lower mapping orbit on August 13th. The DAWN team is preparing to resume science observation tomorrow on the 17th.
From the Current Mission Status page at the DAWN website: QUOTE August 13, 2015 - Dawn Arrives in Third Mapping Orbit
Dawn completed the maneuvering to reach its third mapping orbit and stopped ion-thrusting this afternoon. This was a little ahead of schedule because the spiral descent went so well that some of the allocated thrusting time was not needed. Since July 14, the spacecraft has reduced its orbital altitude from 2,700 miles (4,400 kilometers) to approximately 915 miles (1,470 kilometers). The orbit period has correspondingly decreased from 3.1 days to 19 hours. Dawn is scheduled to begin its new observations on the evening of Aug. 17 (PDT) and continue for more than two months. First, however, the mission control team will measure the actual orbit parameters accurately and transmit them to the spacecraft. |
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Aug 27 2015, 05:38 PM
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Senior Member Group: Members Posts: 3008 Joined: 30-October 04 Member No.: 105 |
QUOTE (habukaz) Something happened here. (and not very long ago) Yes. This relates to a very common Cerean feature, what I informally call a "flowage" or "slippage", for lack of an equivalent terrestrial analog. This has been seen in the SO images where a large (on the order of hundreds of Km) of the surface slip and flow in a fluidic manner. This occurs "internal" to craters as well as "external" to craters, and seems different than simple mass-wasting (although there are similarities). This particular feature in HA-4 is on the order of 15-20 Km is size, which by terrestrial standards would be a continental catastrophe. Tighten your seatbelts. This is only the fourth HAMO image... --Bill -------------------- |
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Aug 27 2015, 09:22 PM
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Member Group: Members Posts: 120 Joined: 26-May 15 From: Rome - Italy Member No.: 7482 |
Probably my eyes but resemble a cone ;-)
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