(278361) 2007 JJ43

From Wikipedia, the free encyclopedia
Jump to: navigation, search
(278361) 2007 JJ43
Discovered by Palomar Observatory
Discovery date 14 May 2007
2007 JJ43
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)
Inclination 12.0623°
Physical characteristics
Dimensions 614 km (0.10 albedo)[4]
730 km (0.09 albedo)[2]
6.04 hr?[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]


  1. ^ a b c d JPL Small-Body Database Browser: 2007 JJ43 Retrieved: 2011-06-18
  2. ^ a b Wm. Robert Johnston (20 August 2011). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 2012-02-03. 
  3. ^ AstDys 2007 JJ43 Summary Retrieved: 2012-02-03
  4. ^ a b 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. ^ a b "AstDys 2007 JJ43 Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2012-02-03. 
  6. ^ A Southern Sky and Galactic Plane Survey for Bright Kuiper Belt Object
  7. ^ 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)