Talk:V774104

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What about Sedna?

It seems that an article discussing the most distant TNO should at least offer some comparison to Sedna, which has a semi-major axis of greater than 500 AU. Is the distance of ~100 AU this object's perihelion? Andrew John Bayles (talk) 02:50, 12 November 2015 (UTC)

As a potential Sednoid, it is assumed that it has a semi-major axis greater than 150 AU. But the observation arc is too short to properly confine perihelion/aphelion. -- Kheider (talk) 08:24, 12 November 2015 (UTC)
Sedna's distance is currently 86.4 AU because it has a very short perihelion. Pi.r (talk) 13:41, 12 November 2015 (UTC)
All that we know is that V774104 has been discovered while ~103AU from the Sun. Perihelion and aphelion are not directly defined by its current distance. Scott and Chad believe it is a Sednoid, but want to keep the discovery details somewhat secret until they have roughly a 1 year observation arc so they can more adequately define the orbit. There are 250 objects with a semi-major axis greater than 500AU. -- Kheider (talk) 14:57, 12 November 2015 (UTC)
Now that the proprietary period is over and the raw data is available online (http://smoka.nao.ac.jp/search?date_obs=2015-10-13&instruments=HSC&obs_mod=all&data_typ=all&dispcol=default&prop_id=o15317&diff=1000&action=Search&asciitable=table), I wonder how long it will take until the astrometry is finally published. We have reached a point where anybody could just do the measurements himself, submit it, and claim credit.Renerpho (talk) 06:45, 21 May 2017 (UTC)

Most distant TNOs

The following discussion is closed. Please do not modify it. Subsequent comments should be made on the appropriate discussion page. No further edits should be made to this discussion.

Since the same table appears in several different articles, shouldn't it be a template or something? I don't know exactly how these things work, so I won't attempt to do it myself... 78.145.113.232 (talk) 09:56, 12 November 2015 (UTC)

I tried creating a template {{TNO-distance}} but it doesn't show up right except when I'm editing the article. Anyone know what I messed up? Please fix. - Denimadept (talk) 11:42, 12 November 2015 (UTC)
Why did you make it a template, instead of embedding it in the page coding? -- 70.51.44.60 (talk) 07:39, 13 November 2015 (UTC)
Because of the post starting this section here on this talk page. Now what needs to happen is that the template needs to be included in whatever other pages include that table. - Denimadept (talk) 08:13, 13 November 2015 (UTC)
Done, for everything listed in the table at any rate. Also searched for "most distant tnos" and found one other occurrence. It could be lurking somewhere else with a different title, of course, but there can't be that many pages that would need to include it... 78.146.212.83 (talk) 14:32, 13 November 2015 (UTC)

Positions of known outer Solar System objects
  Sun
  Jupiter trojans (6,178)
  Scattered disc (>300)   Giant planets: J · S · U · N
  Centaurs (44,000)
  Kuiper belt (>1,000)
(scale in AU; epoch as of January 2026; # of objects in parentheses)

These Solar System minor planets are the furthest from the Sun as of January 2026. The objects have been categorized by their approximate distance from the Sun on that date, and not by the calculated aphelion of their orbit. The list changes over time because the objects are moving in their orbits. Some objects are inbound and some are outbound. It would be difficult to detect long-distance comets if it were not for their comas, which become visible when heated by the Sun. Distances are measured in astronomical units (AU, Sun–Earth distances). The distances are not the minimum (perihelion) or the maximum (aphelion) that may be achieved by these objects in the future.

This list does not include near-parabolic comets of which many are known to be currently more than 100 AU (15 billion km) from the Sun, but are currently too far away to be observed by telescope. Trans-Neptunian objects are typically announced publicly months or years after their discovery, so as to make sure the orbit is correct before announcing it. Due to their greater distance from the Sun and slow movement across the sky, trans-Neptunian objects with observation arcs less than several years often have poorly constrained orbits. Particularly distant objects take several years of observations to establish a crude orbit solution before being announced. For instance, the most distant known trans-Neptunian object 2018 AG37 was discovered by Scott Sheppard in January 2018 but was announced three years later in February 2021.[1]

Notable objects

One particularly distant body is 90377 Sedna, which was discovered in November 2003. It has an extremely eccentric orbit that takes it to an aphelion of 937 AU.[2] It takes over 10,000 years to orbit, and during the next 50 years it will slowly move closer to the Sun as it comes to perihelion at a distance of 76 AU from the Sun.[3] Sedna is the largest known sednoid, a class of objects that play an important role in the Planet Nine hypothesis. The discovery of 2017 OF201 challenges the existence of the hypothetical Planet Nine as its orbit is anti-aligned to the calculated orbit of Planet Nine. It is suggested that the hypothetical planet would have ejected 2017 OF201 from its present-day orbit over times scales of less than 100 million years, though it could be in a temporary orbit.[4][5]

Pluto (30–49 AU, about 34 AU in 2015) was the first Kuiper belt object to be discovered (1930) and is the largest known dwarf planet.

The orbits of the extreme trans-Neptunian objects are shown in various colors, with Planet Nine's orbit shown in bright green. Most of the orbits are aligned to the right of Planet Nine.
Six original and eight additional ETNO objects orbits with their positions near their perihelion in purple, with hypothetical Planet Nine orbit in green

Known distant objects

This is a list of known objects at heliocentric distances of more than 80 AU. In theory, the Oort cloud could extend over 120,000 AU (2 ly) from the Sun.

More information Object name, Distance from the Sun (AU) ...
Most distant observable objects in the Solar System (distances in January 2026)[6]
Object name Distance from the Sun (AU)[7] Radial velocity
(AU/yr)[a][7]
Perihelion Aphelion Semimajor
axis
Apparent
magnitude
Absolute
magnitude
(H)
Discovery date[7] Refs
January 2026 At discovery date
Great Comet of 1680
(for comparison)
262.21.16+0.470.006889444N/aN/a1680-11-14[8]
Voyager 1
(for comparison)
169.2+3.568.79
Hyperbolic
−3.22N/aN/aN/a[9]
Voyager 2
(for comparison)
141.7+3.1721.3
Hyperbolic
−4.03N/aN/aN/a[10]
Pioneer 10
(for comparison)
140.1+2.505.06
Hyperbolic
–6.94N/aN/aN/a[11]
2018 AG37[b] 132.4132.6+0.0327.1145.086.025.44.22018-01-15[12]
2018 VG18 123.9123.4+0.0537.8123.981.324.63.72018-11-10[13]
Heliopause
(for comparison)
~120[14]
Pioneer 11
(for comparison)
116.2+2.339.35
Hyperbolic
–8.14N/aN/aN/a[15]
2020 BE102[b] 110.3111.2–0.1532.9116.974.925.65.12020-01-24[16]
2020 FY30 98.499.2−0.1335.6107.771.624.84.72020-03-24[17]
2020 FA31 98.097.1+0.1539.5102.471.025.45.42020-03-24[18]
Eris
136199
95.597.0−0.0938.397.567.918.8−1.22003-10-21[19]
2020 FQ40 92.292.5−0.0538.293.165.625.76.12020-03-24[20]
2015 TH367 92.088.2+0.3628.9136.482.626.36.62015-10-13[21]
2017 OF201 91.085.6+0.6344.9163084022.83.52017-07-23[22]
2021 DR15 90.289.4+0.1637.896.567.223.13.62021-02-17[23]
Gonggong
225088
89.785.4+0.2133.7101.267.521.51.62007-07-17[24]
2014 UZ224 87.492.5−0.4638.3177.0107.623.23.42014-10-21[25]
2015 FG415 86.688.0−0.1536.292.164.125.56.02015-03-17[26]
2014 FC69 86.783.7+0.2540.4104.472.424.24.62014-03-25[27]
2006 QH181 85.182.9+0.1837.596.767.123.74.32006-08-21[28]
Sedna
90377
83.089.6−0.2676.2937484.421.01.32003-11-14[29]
2015 VO166 85.782.5+0.3038.3113.275.825.55.92015-11-06[30]
2012 VP113 85.082.9+0.1880.4462271.223.34.02012-11-05[31]
2017 SN132 84.881.2+0.4342.0110.076.025.25.82017-09-16[32]
2015 TJ367 81.377.0+0.4133.6128.481.025.86.72015-10-13[33]
2013 FS28 80.887.9−0.5634.2358.2196.224.34.92013-03-16[34]
2021 DP15 80.279.40.1636.286.161.124.95.92021-02-16[35]
2015 UH87 80.282.4−0.2234.390.062.225.26.02015-10-16[36]
1I/ʻOumuamua
(for comparison)
50.41.21+5.700.256
Hyperbolic
–1.273922.12017-10-19[37]
This table includes all observable objects located at least 80 AU from the Sun on 1 January 2026.[6]
Close
In addition to current distance and magnitude, I think this should include the albedo factor, avg distance, semi-major axis, aphelion, perihelion, eccentricity, orbital inclination, proper motion -- 70.51.44.60 (talk) 06:31, 14 November 2015 (UTC)
Do we really want to over-complicate the list? Even though albedo is relevant to distance, size, and vmag, I am not sure it will mean much to the average reader. Avg distance and semi-major axis are the same thing. Does the average reader care about proper motion? "Just my first thoughts on the subject." -- Kheider (talk) 07:38, 14 November 2015 (UTC)
It's very possible that eventually the template will turn into a List-class article of all known TNOs. Then the relevant articles can add a {{See Also}} to point at the list article instead of having it embedded. I expect this will happen when we get a few more TNOs for the list. I'm kinda tempted to do it now, to invite more contributions. We can rotate it and add more columns, as 70.51.44.60 suggested. I suspect more people will contribute to an article than to a template. It's just that 78.145.113.232 asked about a template, so I didn't think very hard about it. Something like List of Trans-Neptunian Objects with a sortable table. - Denimadept (talk) 10:52, 14 November 2015 (UTC)
 Done - List article created: List of Trans-Neptunian Objects. It needs a lot of work, but I created it as a starting point. Add columns as appropriate, add {{See Also}} to the referring articles, and stop using the template. Then we can have the template deleted. - Denimadept (talk) 11:09, 14 November 2015 (UTC)
Uh oh. There's already a List of trans-Neptunian objects article. Why not just refer to the existing article rather than including the original table? - Denimadept (talk) 11:32, 14 November 2015 (UTC)
I think the list of most distant objects should only include those currently at least two Neptune distances away from the Sun (60.14 AU). Looking at AstDys, there are many objects inside that distance, but only 9 beyond (V774104 would be the 10th). Objects at least two Neptune distances from Sun vs Objects at least 50 AU from Sun. Ambi Valent (talk) 13:45, 14 November 2015 (UTC)
If there is a list article, it'd be better as List of most distant objects in the Solar System, with separate sections for current distance, average distance, and aphelion, for three different determinants of "most distant" -- 70.51.44.60 (talk) 15:46, 14 November 2015 (UTC)
It's already List of trans-Neptunian objects. I've redirected my new article to the existing one. - Denimadept (talk) 19:47, 14 November 2015 (UTC)
I meant the analog of this table, the most distant ones are not equivalent to all TNOs, so it would be better to just call it the most distant objects -- 70.51.44.60 (talk) 06:57, 15 November 2015 (UTC)
Given how slowly these things move when far from the Sun, List of Solar System objects most distant from the Sun in 2015 is basically the same thing. I am not sure how many of these almost identical TNO "list articles" Wikipedia wants. Eris is moving at a slow 2.3km/s wrt the Sun and 2000 CR105 is still only moving 5km/s wrt the Sun. -- Kheider (talk) 07:17, 15 November 2015 (UTC)
So continue using the template if that works for you, but my feeling is that an ever-growing sortable list of TNOs would do. If you want to know what's farthest away, or nearest, click on the "distance" column. - Denimadept (talk) 08:48, 15 November 2015 (UTC)
That would result in unreasonably large tables/pagesizes, as more and more TNOs are discovered. A separate list of most distant objects would make a smaller subset list, under the different classes of distance measurements (avg, perihelion, apohelion, current distance, distance above/below ecliptic, etc) -- 70.51.44.60 (talk) 10:01, 19 November 2015 (UTC)

The discussion above is closed. Please do not modify it. Subsequent comments should be made on the appropriate discussion page. No further edits should be made to this discussion.

References

  1. "MPEC 2021-C187 : 2018 AG37". Minor Planet Electronic Circular. Minor Planet Center. 10 February 2021. Retrieved 10 February 2021.
  2. Horizons output. "Barycentric Osculating Orbital Elements for 90377 Sedna (2003 VB12)". Retrieved 18 September 2021. (Solution using the Solar System barycenter. Select Ephemeris Type:Elements and Center:@0) (Saved Horizons output file 2011-Feb-04 "Barycentric Osculating Orbital Elements for 90377 Sedna". Archived from the original on 19 November 2012.) In the second pane "PR=" can be found, which gives the orbital period in days (4.160E+06, which is 11,390 Julian years).
  3. Cheng, Sihao; Li, Jiaxuan; Yang, Eritas (2025). "Discovery of a dwarf planet candidate in an extremely wide orbit: 2017 OF201". arXiv:2505.15806 [astro-ph.EP].
  4. "An Extreme Cousin for Pluto? Possible Dwarf Planet Discovered at Solar System's Edge". www.ias.edu (Press release). Institute for Advanced Study. 2025-05-20. Retrieved 2025-05-23.
  5. "AstDyS-2, Asteroids  Dynamic Site". Retrieved 2025-07-06. Objects with distance from Sun over 80 AU
  6. JPL Horizons On-Line Ephemeris System. "JPL Horizons On-Line Ephemeris". Retrieved 2025-07-06.
    Ephemeris Type: Vector; Observer Location: @sun; Time Span: Start=2015-12-01, Stop=2026-01-01, Intervals=1; Table Settings: quantities code=6
  7. "JPL Horizons On-Line Ephemeris for Voyager 1 at epoch 2026-01-01". JPL Horizons On-Line Ephemeris System. Jet Propulsion Laboratory. Retrieved 2025-07-06. Solution using the Solar System Barycenter. Ephemeris Type: Elements and Center: @0)
  8. "JPL Horizons On-Line Ephemeris for Voyager 2 at epoch 2026-01-01". JPL Horizons On-Line Ephemeris System. Jet Propulsion Laboratory. Retrieved 2025-07-06. Solution using the Solar System Barycenter. Ephemeris Type: Elements and Center: @0)
  9. "JPL Horizons On-Line Ephemeris for Voyager 2 at epoch 2026-01-01". JPL Horizons On-Line Ephemeris System. Jet Propulsion Laboratory. Retrieved 2025-07-06. Solution using the Solar System Barycenter. Ephemeris Type: Elements and Center: @0)
  10. "2018 AG37". Minor Planet Center. Retrieved 2025-07-06.
  11. "2018 VG18". Minor Planet Center. Retrieved 2025-07-06.
  12. Stone, E. C.; Cummings, A. C.; Heikkila, B.C.; Lal, Nand (2019). "Cosmic ray measurements from Voyager 2 as it crossed into interstellar space". Nature Astronomy. 3 (11): 1013–1018. Bibcode:2019NatAs...3.1013S. doi:10.1038/s41550-019-0928-3. S2CID 209962964.
  13. "JPL Horizons On-Line Ephemeris for Voyager 2 at epoch 2026-01-01". JPL Horizons On-Line Ephemeris System. Jet Propulsion Laboratory. Retrieved 2025-07-06. Solution using the Solar System Barycenter. Ephemeris Type: Elements and Center: @0)
  14. "2020 BE102". Minor Planet Center. Retrieved 2025-07-06.
  15. "2020 FY30". Minor Planet Center. Retrieved 2025-07-06.
  16. "2020 FA31". Minor Planet Center. Retrieved 2025-07-06.
  17. "2020 FQ40". Minor Planet Center. Retrieved 2025-07-06.
  18. "2015 TH367". Minor Planet Center. Retrieved 2025-07-06.
  19. "2017 OF201". Minor Planet Center. Retrieved 2025-07-06.
  20. "2021 DR15". Minor Planet Center. Retrieved 2025-07-06.
  21. "2014 UZ224". Minor Planet Center. Retrieved 2025-07-06.
  22. "2015 FG415". Minor Planet Center. Retrieved 2025-07-06.
  23. "2014 FC69". Minor Planet Center. Retrieved 2025-07-06.
  24. "2006 QH181". Minor Planet Center. Retrieved 2025-07-06.
  25. "2015 VO166". Minor Planet Center. Retrieved 2025-07-06.
  26. "2012 VP113". Minor Planet Center. Retrieved 2025-07-06.
  27. "2017 SN132". Minor Planet Center. Retrieved 2025-07-06.
  28. "2015 TJ367". Minor Planet Center. Retrieved 2025-10-18.
  29. "2013 FS28". Minor Planet Center. Retrieved 2025-07-06.
  30. "2021 DP15". Minor Planet Center. Retrieved 2025-07-06.
  31. "2015 UH87". Minor Planet Center. Retrieved 2025-07-06.

Magnitude estimate (24?)

Perihelion lifted?

Dimensions

Is a dwarf planet

Any new data?

2015 TH367 Uncertainty parameter

Identification 2015 TH367 = V774104

Distance

Why new data for V774104 included in table concerning Perihelion and Semi-major axis estimation ?

Is this same as 2015 TG387 ?

Any known identification yet?

Disputed

changed to competing RD requests

Merge proposal

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