(278361) 2007 JJ43

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(278361) 2007 JJ43
Discovery[1]
Discovered by Palomar Observatory
Discovery date 14 May 2007
Designations
2007 JJ43
TNO
Cubewano[2]
Orbital characteristics[1][3]
Epoch JD 2455800.5 (27 August 2011, 0:00)
Aphelion 55.3707 AU
Perihelion 40.2776 AU
47.82 AU
Eccentricity 0.1578
330.74 yr (120801 d)
331.84°
Inclination 12.0623°
272.493°
9.02°
Physical characteristics
Dimensions 670±150 km[4]
12.097 h[4]
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 a possible 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 (about 650–800 km diameter). Mike Brown's website lists it as a "highly likely" dwarf planet.[7] Its diameter is 670±150 km.[4]

Observations by Brown in 2012, using the W. M. Keck Observatory, suggest that (278361) 2007 JJ43 does not have a companion.[8]

As of 2014, it is about 41.3 AU from the Sun.[5]

References[edit]

  1. ^ a b c JPL Small-Body Database Browser: 2007 JJ43 Retrieved: 2011-06-18
  2. ^ 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 c "Pushing the Limits of K2:Observing Trans-Neptunian Objects S3K2: Solar System Studies with K2" (PDF). 
  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. ^ Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 2011-08-25. 
  8. ^ 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)