(278361) 2007 JJ43
Discovery[1] | |
---|---|
Discovered by | Palomar Observatory |
Discovery date | 14 May 2007 |
Designations | |
2007 JJ43 | |
TNO Cubewano[2] | |
Orbital characteristics[3][1] | |
Epoch 2011-08-27 0:00UTC (JD 2455800.5) | |
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° | |
9.02° | |
Physical characteristics | |
Dimensions |
614 km (0.10 albedo)[4] 730 km (0.09 albedo)[2] |
6.04 hr?[1] | |
20.8[5] | |
3.2[6] 3.9[1] |
(268361) 2007 JJ43 is a trans-Neptunian object (TNO) orbiting the Sun near the outer edge of the Kuiper belt. Based on how bright it appears, it is expected to be a dwarf planet.
Its discovery images were taken in 2007, and its absolute magnitude of 4.4 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 (≈650–800 km diameter). Mike Brown's website lists it as a highly likely dwarf planet,[4] but its diameter has never been measured.
Observations by Brown in 2012, using the W. M. Keck Observatory, suggest that 2007 JJ43 does not have a companion.[7]
As of 2014, it is about 41.3 AU from the Sun.[5]
References
- ↑ 1.0 1.1 1.2 1.3 JPL Small-Body Database Browser: 2007 JJ43 Retrieved: 2011-06-18
- ↑ 2.0 2.1 Wm. Robert Johnston (20 August 2011). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 2012-02-03.
- ↑ AstDys 2007 JJ43 Summary Retrieved: 2012-02-03
- ↑ 4.0 4.1 Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 2011-08-25.
- ↑ 5.0 5.1 "AstDys 2007 JJ43 Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2012-02-03.
- ↑ A Southern Sky and Galactic Plane Survey for Bright Kuiper Belt Object
- ↑ Plutokiller (2012-02-03). "2007 JJ43 doesn't have a big moon. There could be a small one hiding in there". Twitter. Retrieved 2012-02-03. (moonless)
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