Discovery [1] | |
---|---|
Discovered by | Palomar Obs. |
Discovery site | Palomar Obs. |
Discovery date | 14 May 2007 |
Designations | |
2007 JJ43 | |
TNO [1] [2] · ScatNear [3] | |
Orbital characteristics [4] [1] | |
Epoch 27 August 2011 ( JD 2455800.5) | |
Uncertainty parameter 2 | |
Observation arc | 4813 days (13.18 yr) |
Earliest precovery date | 10 May 2002 ( NEAT) |
Aphelion | 55.3707 AU |
Perihelion | 40.2776 AU |
47.82 AU | |
Eccentricity | 0.1578 |
330.74 a (120801 d) | |
331.84° | |
Inclination | 12.0623 ° |
272.493° | |
≈ 2 April 2037
[5] ±6 days | |
9.02° | |
Physical characteristics | |
Mean diameter | 530
km (est. at
0.08)
[6] 457 km (est. at 0.135) [2] 610+170 −140 km [7] |
0.13 [7] | |
20.8 [8] | |
(268361) 2007 JJ43 is a large
trans-Neptunian object (TNO) orbiting the
Sun near the outer edge of the
Kuiper belt. Its discovery images were taken in 2007, and its
absolute magnitude of 4.5 is one of the twenty brightest exhibited by TNOs. Assuming it has a typical
albedo, this would make it roughly the same size as
Ixion (about 530–620 km diameter).
In a paper in the Astrophysical Journal Letters András Pál and colleagues estimate a diameter for (278361) 2007 JJ43 of 610+170
−140 km.
[7]
Observations by Brown in 2012, using the W. M. Keck Observatory, suggest that (278361) 2007 JJ43 does not have a companion. [10]
As of 2014 [update], it is about 41.3 AU from the Sun. [8]