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| ▲ | akkartik 12 hours ago | parent | next [-] |
| Did you intend to recommend 2688 Halley in the suggestions over 1P/Halley? |
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| ▲ | ddahlen 11 hours ago | parent [-] | | Hah, no that's a mistake. I really need to update that list anyways, there are more interesting orbits. | | |
| ▲ | akkartik 10 hours ago | parent [-] | | Thank you for an awesome app! It got me to learn the difference between 2688 Halley and 1P/Halley :) |
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| ▲ | akkartik 13 hours ago | parent | prev | next [-] |
| How do I enable asteroids from the UI? It looks like the information is packed into that `v` param somehow? |
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| ▲ | ddahlen 11 hours ago | parent [-] | | Yeah its not the most user friendly, go into the filters tab and check the numbered and unnumbered check boxes. |
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| ▲ | Teever a day ago | parent | prev [-] |
| I've always only ever seen diagrams of the Jupiter Trojans from a top down perspective so I never realized how much they stretched beyond the orbital plane of the solar system. Do you know why they stretch so up and down relative to Jupiter? Is that sort 3d distribution shape typical for L4 and L5 Lagrangian points, and it's just amplified by the size of Jupiter or is there something else at play there? |
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| ▲ | ddahlen 11 hours ago | parent [-] | | The Lagrange points are more like "regions" than points in reality. There is some complicated math you can do to work it out, but typically numerical stuff is a bit more reliable once you start to include the rest of the planets, the analytic theory gets pretty complicated the more bodies you include. The trojans that you see there sort of do a little dance when you plot them in the rotating frame of Jupiter (more technical term is librate). The size of the region has to do with the mass of the parent body, since jupiter is so big, the capturing region is pretty large. Technically there are other trojans around some other planets, but most of them are not long term stable like jupiter is, mainly because jupiter is just big. | | |
| ▲ | Teever 6 hours ago | parent [-] | | Yeah I knew they were regions more than points, I just sort of envisioned them as something more in the same of a tapered tail than something so tall compared the diameter of Jupiter. I'd like to take the time to tell you that I really appreciate your contributions to this site. I'm always excited when there's a post about asteroids or something similarly sized in the solar system because I know that you'll post about it more often than not. I've taken a course on the geology of the solar system and a course on exoplanet detection but I definitely consider myself a layman in this field. I've always had a particular fascination with these small tumbling rocks in our solar system so it's always a pleasure to see you talk about them and your work. | | |
| ▲ | ddahlen 2 hours ago | parent [-] | | Thanks! Here is a fun comet orbit for you:
https://dahlend.github.io/ketev/#t=2018-02-08.9717&sel=P/202... This guy had a close encounter with saturn in 2018 and his orbit dramatically changed. At the time he was likely a very cold object that had frozen volatile material (usually water and CO/CO2), The PANSTARRS telescope found him in 2023 after he started giving off material and becoming a comet. Because he came so close to saturn, it is likely that the estimate of the orbit before this is not super precise, as orbital mechanics is a chaotic thing and small changes of initial conditions become huge changes later. |
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