Timeline for Xenon vs Hydrazine, "Should I Stay or Should I go?" Dawn mission decisions
Current License: CC BY-SA 3.0
25 events
| when toggle format | what | by | license | comment | |
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| Jun 17, 2020 at 8:54 | history | edited | CommunityBot |
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| Nov 5, 2017 at 9:26 | answer | added | Hobbes | timeline score: 2 | |
| S Oct 30, 2017 at 4:44 | history | bounty ended | uhoh | ||
| S Oct 30, 2017 at 4:44 | history | notice removed | uhoh | ||
| S Oct 29, 2017 at 4:29 | history | bounty started | uhoh | ||
| S Oct 29, 2017 at 4:29 | history | notice added | uhoh | Reward existing answer | |
| S Oct 29, 2017 at 4:24 | history | bounty ended | uhoh | ||
| S Oct 29, 2017 at 4:24 | history | notice removed | uhoh | ||
| Oct 29, 2017 at 4:24 | vote | accept | uhoh | ||
| Oct 27, 2017 at 15:43 | answer | added | Mark Adler | timeline score: 6 | |
| Oct 27, 2017 at 8:14 | answer | added | Julio | timeline score: 2 | |
| S Oct 22, 2017 at 5:27 | history | bounty started | uhoh | ||
| S Oct 22, 2017 at 5:27 | history | notice added | uhoh | Draw attention | |
| Oct 21, 2017 at 14:46 | history | edited | uhoh | CC BY-SA 3.0 |
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| Oct 21, 2017 at 14:32 | history | edited | uhoh | CC BY-SA 3.0 |
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| Sep 29, 2017 at 1:50 | history | edited | uhoh | CC BY-SA 3.0 |
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| Sep 20, 2017 at 5:52 | history | edited | uhoh |
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| Jun 30, 2017 at 2:06 | history | tweeted | twitter.com/StackSpaceExp/status/880608335443226626 | ||
| Jun 20, 2017 at 4:02 | comment | added | uhoh | @ChrisR Thanks! I can see you are appreciating the complexities of the current situation. The only thing I'd add is that I think it's the higher order multipole components of the gravity field that are the problem, not any uncertainty in the spherically symmetric (monopole) $GM/r^2$ part, and these would increase even more rapidly with decreasing distance. By now there should be more than plenty of precision in $GM_{Ceres}$. | |
| Jun 19, 2017 at 19:44 | comment | added | ChrisR | I don't have enough knowledge about the Dawn mission, but I would recommend answers to address the uncertainty of the Ceres gravity field (and gravity is proportional to 1/r^2), the difference between stations keeping and attitude keeping (the former with an ion prop needs low thrust for several days, the latter short burst for momentum dumping to spin the wheels down), and hence (items 1&2) the likely impossibility of using the ion prop for attitude control when in orbit around a small body, but more possible when further way. (Great question by the way!) | |
| Jun 18, 2017 at 13:33 | history | edited | uhoh | CC BY-SA 3.0 |
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| Jun 18, 2017 at 12:21 | comment | added | Uwe | If there are Mascons in Ceres, keeping a stable low orbit may require additional fuel. The mapping process will require fuel for attitude control to get good and precisely overlapping images. | |
| Jun 18, 2017 at 11:18 | history | edited | uhoh | CC BY-SA 3.0 |
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| Jun 18, 2017 at 11:14 | comment | added | uhoh | The Clash - "Should I Stay or Should I Go" (Live at Shea Stadium): youtu.be/oGIFublvDes | |
| Jun 18, 2017 at 11:13 | history | asked | uhoh | CC BY-SA 3.0 |