Supriya Ghosh (Editor)

(278361) 2007 JJ43

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Discovery date  14 May 2007
Minor planet category  TNO Cubewano
Discovered  14 May 2007
Aphelion  55 m
Inclination  12.0623°
Discovery site  Palomar Observatory
Alternative names  2007 JJ43
Mean anomaly  331.84°
Perihelion  40 m
Semimajor axis  48 m
Discovered by  Palomar Observatory
Eccentricity  6999157800000000000♠0.1578
Orbital period  330.74 a (7010104372064000000♠120801 d)

(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 4.5 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). Mike Brown's website lists it as a "highly likely" dwarf planet, but its diameter has never been measured. In "K2 Science Conference" Robert Szabo wrote (278361) 2007 JJ43 - 7005610000000000000♠610+170
−140
 km
.

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

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

References

(278361) 2007 JJ43 Wikipedia