(278361) 2007 JJ43
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(278361) 2007 JJ43
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Discovery[1]
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| Discovered by | Palomar Observatory |
| Discovery date | 14 May 2007 |
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Designations
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| Alternate name(s) | 2007 JJ43 |
| Minor planet category |
TNO |
| Epoch 2011-08-27 0:00UTC (JD 2455800.5) | |
| Aphelion | 55.3707 AU |
| Perihelion | 40.2776 AU |
| Semi-major axis | 47.82 AU |
| Eccentricity | 0.1578 |
| Orbital period | 330.74 a (120801 d) |
| Mean anomaly | 331.84° |
| Inclination | 12.0623° |
| Longitude of ascending node | 272.493° |
| Argument of perihelion | 9.02° |
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Physical characteristics
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| Dimensions | 694 km (0.13 albedo)[3] 800 km (0.09 albedo)[4] |
| Apparent magnitude | 20.8[5] |
| Absolute magnitude (H) | 3.2[6], 3.7[1], or 4.4[2] |
(278361) 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. Its absolute magnitude of 3.7 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,[3] but the diameter of the object has never been measured.
Observations by Mike Brown in 2012 using the W. M. Keck Observatory suggest that 2007 JJ43 does not have a companion.[7]
As of 2012[update], (278361) 2007 JJ43 is about 41.5 AU from the Sun.[5]
References
- ^ a b c JPL Small-Body Database Browser: 2007 JJ43 Retrieved: 2011-06-18
- ^ a b AstDys 2007 JJ43 Summary Retrieved: 2012-02-03
- ^ a b Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. http://www.gps.caltech.edu/~mbrown/dps.html. Retrieved 2011-08-25.
- ^ Wm. Robert Johnston (20 August 2011). "List of Known Trans-Neptunian Objects". Johnston's Archive. http://www.johnstonsarchive.net/astro/tnoslist.html. Retrieved 2012-02-03.
- ^ a b "AstDys 2007 JJ43 Ephemerides". Department of Mathematics, University of Pisa, Italy. http://hamilton.dm.unipi.it/astdys/index.php?pc=1.1.3.0&n=2007JJ43. Retrieved 2012-02-03.
- ^ [http://arxiv.org/pdf/1107.5309v1.pdf A Southern Sky and Galactic Plane Survey for Bright Kuiper Belt Object
- ^ Plutokiller (2012-Feb-03). "2007 JJ43 doesn't have a big moon. There could be a small one hiding in there". Twitter. https://twitter.com/#!/plutokiller/status/165453799052423168. Retrieved 2012-02-03. (moonless)
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