Timeline for Is there an optimum orbit for a Hipparcos/Gaia-like parallax observatory
Current License: CC BY-SA 4.0
20 events
| when toggle format | what | by | license | comment | |
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| Jan 10, 2023 at 22:08 | comment | added | eshaya | Of course, what you really want, is one Gaia where it is, and another Gaia headed out of the solar system. Perhaps a third one going perpendicular to the second. | |
| Jan 10, 2023 at 13:34 | answer | added | Imyaf | timeline score: 1 | |
| Aug 19, 2020 at 16:50 | history | edited | ProfRob | CC BY-SA 4.0 |
edited body; edited title
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| Aug 18, 2020 at 21:23 | answer | added | 0x539 | timeline score: 2 | |
| Oct 13, 2019 at 11:40 | comment | added | uhoh | @Ingolifs I think it's silly for comments to put the optimization criterion on you. It might be a good idea to refactor the question and ask for the tradeoffs between a heliocentric orbit at ~1 AU (which is what a Sun-Earth Lagrange orbit really is) and an orbit at some other distance from the Sun. Asking for tradeoffs can be answered unambiguously, and answers might also provide some insight into optimization. | |
| Oct 12, 2019 at 22:55 | review | Close votes | |||
| Oct 16, 2019 at 0:35 | |||||
| Oct 12, 2019 at 21:02 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Jun 14, 2019 at 20:03 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| May 15, 2019 at 13:03 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| S Apr 23, 2019 at 6:02 | history | bounty ended | CommunityBot | ||
| S Apr 23, 2019 at 6:02 | history | notice removed | CommunityBot | ||
| Apr 16, 2019 at 8:34 | comment | added | Ingolifs | Yes I might refactor this question in the next couple of days. It appears different science objectives will have different optimum orbits, and so the question becomes one of multi-objective optimisation, where the relative preference for certain scientific objectives is down to individual taste. I'm not saying such a question can't be answered, but I do understand it makes it harder. | |
| Apr 15, 2019 at 12:15 | answer | added | Yoann A. | timeline score: 2 | |
| Apr 15, 2019 at 10:56 | comment | added | ProfRob | You need to set some parameters - principally, how quickly does the information need to be gathered? You also need to be clearer about what you want to measure. Just the astrometric parameters for single stars, or are you looking for photocentre motion to find binaries and planets? It's fine if you don't want to set these parameters but it might make people a bit wary of setting off writing what could be a very, very long answer indeed. And that's before we get onto the operational aspects of any planned mission. | |
| Apr 15, 2019 at 9:34 | comment | added | Steve Linton | One thing you could do is use multiple missions. If you sent two probes on diverging trajectories (say fast solar escape trajectories via Jupiter flypasts) you could get a very long baseline between then (at least in some directions) in a decade or so. | |
| Apr 15, 2019 at 9:33 | comment | added | Steve Linton | Can there really be an optimum unless you know what you want to optimise? If you really need to know the parallax of a very distant object you are going to need a very long baseline and you have no choice but to wait. If you wanted to do a quick Gaia foillow-up and recheck the parallaxes of a lot of relatiuvely near stars to look for major changes, then Earth orbit is just fine. | |
| Apr 15, 2019 at 9:00 | history | tweeted | twitter.com/StackAstronomy/status/1117714345176260609 | ||
| S Apr 15, 2019 at 4:29 | history | bounty started | Ingolifs | ||
| S Apr 15, 2019 at 4:29 | history | notice added | Ingolifs | Draw attention | |
| Apr 9, 2019 at 7:58 | history | asked | Ingolifs | CC BY-SA 4.0 |