Talk:List of Solar System objects most distant from the Sun

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Known Distance Objects dates of past/future Perihelion/Aphelion

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I'm interested in viewing the approximate Time of perihelion of the various known distance objects. This could even be extended to include past/future Perihelion/Aphelion. For some objects it may be completely unknown, or a work in progress, as in FarFarOut whose Wikipedia page says "Time of perihelion ≈ 1758?" but others may already be part of models that currently predict these dates, such as Eris whose Wikipedia page explains, "Using numerical integration JPL Horizons shows Eris came to perihelion around 1699, to aphelion around 1977, and returning to perihelion around December 2257."

Orbital Period might be another column of interest for the table.

Chrisjburt (talk) 17:59, 12 February 2021 (UTC)[reply]

2017 DP121

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For 2017 DP121, its distance is marked to be greater than its aphelion. That should not be possible, I think?Am I wrong? 109.240.131.161 (talk) 13:46, 14 September 2021 (UTC)[reply]

The orbital values for 2017DP121 were wrong. With a condition code of 8, aphelion (Q) is 94 ± 17au. With a 1 year observation arc, the orbit is not well constrained. Thank you for pointing that out. -- Kheider (talk) 14:32, 14 September 2021 (UTC)[reply]

2017 OF201

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2017 OF201 is a large trans-Neptunian object with a Aphelion of 1700±60 AU (if heliocentric) or it’s 1632±14 AU so should it be on the list? Fred1000000000 (talk) 15:05, 8 June 2025 (UTC)[reply]

At a distance of 88.4 AU as of December 2021, yes. I think it will be added to AstDyS-2 within the next few weeks, I suggest to wait with adding it until then (so we can keep the reference consistent). Renerpho (talk) 17:02, 8 June 2025 (UTC)[reply]

Too many objects; cut minimum distance to 80 AU?

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Now that we have bigger and more sensitive surveys (Subaru, DECam, Vera Rubin's LSST) discovering even more distant TNOs, I think we have to trim this list to make it more manageable to update? This is is already quite outdated (I haven't gotten around to adding 2017 OF201 yet!) and I've seen numerous TNOs with heliocentric distances 60-80 AU announced in MPECs over the past several months. It's a bit arbitrary, but I think we should set 80 AU as the new minimum distance for inclusion in this list. What do you think? Pinging @Kheider, Renerpho, Exoplanetaryscience, ArkHyena, and Thirtyfourninety: since you all have involvement in editing TNO-related articles. Nrco0e (talk • contribs) 22:40, 3 July 2025 (UTC)[reply]

I agree. I think we should up the distance requirement to 80 AU; I was going to suggest including just a couple historically notable 60-80 AU objects for comparison, but honestly there isn't that much that I see to be worth making exceptions to the rule in that region. exoplanetaryscience (talk) 22:44, 3 July 2025 (UTC)[reply]
Agree with 80 AU cutoff. With better surveys, many years from now, the limit might be set to 120 AU. -- Kheider (talk) 01:07, 4 July 2025 (UTC)[reply]
No objection from me. It's been a couple of years since we increased the threshold from 50 to 60 au. It's time to do it again. 80 au seems to be good. Renerpho (talk) 15:42, 4 July 2025 (UTC)[reply]

what's with the 2026?!

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why is there January 2026 all over the place?! I'm trying my best to fix it. Doing this (talk) 19:19, 11 July 2025 (UTC)[reply]

@Doing this: This is not a typo. I've set the dates to January 2026 (the dates of the distances shown) so we don't have to update all the distances in the entire table when 2026 comes around. The objects move and change distance from the Sun over time, and it's a very painstaking task to update the whole table yearly. Nrco0e (talk • contribs) 20:45, 11 July 2025 (UTC)[reply]
@Nrco0e ooh, okay. Doing this (talk) 20:59, 11 July 2025 (UTC)[reply]