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(268361) 2007 JJ43 is a large trans-Neptunian object (TNO) orbiting the Sun near the outer edge of the Kuiper belt. 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). In a paper in the Astrophysical Journal Letters András Pál and colleagues estimate a diameter for (278361) 2007 JJ43 of 610+170
−140 km.[7]

(278361) 2007 JJ43
Discovery[1]
Discovered byPalomar Obs.
Discovery sitePalomar Obs.
Discovery date14 May 2007
Designations
Alternative designations
2007 JJ43
Minor planet category
TNO[1][2] · ScatNear[3]
Orbital characteristics[4][1]
Epoch 27 August 2011 (JD 2455800.5)
Uncertainty parameter 2
Observation arc4813 days (13.18 yr)
Earliest precovery date10 May 2002 (NEAT)
Aphelion55.3707 AU
Perihelion40.2776 AU
Semi-major axis
47.82 AU
Eccentricity0.1578
Orbital period (sidereal)
330.74 a (120801 d)
Mean anomaly
331.84°
Inclination12.0623°
Longitude of ascending node
272.493°
Time of perihelion
≈ 2 April 2037[5]
±6 days
Argument of perihelion
9.02°
Physical characteristics
Mean diameter
530 km (est. at 0.08)[6]
558 km (est. at 0.09)[2]
610+170
−140 km[7]
Synodic rotation period
Geometric albedo
0.13[7]
Apparent magnitude
20.8[8]
Absolute magnitude (H)

Observations by Brown in 2012, using the W. M. Keck Observatory, suggest that (278361) 2007 JJ43 does not have a companion.[10]

As of 2014, it is about 41.3 AU from the Sun.[8]


See also



References


  1. JPL Small-Body Database Browser: 2007 JJ43 Retrieved: 2011-06-18
  2. Wm. Robert Johnston (18 August 2020). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 23 July 2021.
  3. Marc W. Buie. "Orbit Fit and Astrometric record for 278361". SwRI (Space Science Department). Retrieved 2018-02-18.
  4. AstDys 2007 JJ43 Summary Retrieved: 2012-02-03
  5. JPL Horizons Observer Location: @sun (Perihelion occurs when deldot changes from negative to positive. Uncertainty in time of perihelion is 3-sigma.)
  6. Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Archived from the original on 2019-05-31. Retrieved 2019-08-13.
  7. Pál, A.; et al. (2015). "Pushing the Limits: K2 Observations of the Trans-Neptunian Objects 2002 GV31 and (278361) 2007 JJ43". The Astrophysical Journal Letters. 804 (2). L45. arXiv:1504.03671. Bibcode:2015ApJ...804L..45P. doi:10.1088/2041-8205/804/2/L45. S2CID 117489359.
  8. "AstDys 2007 JJ43 Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2012-02-03.
  9. A Southern Sky and Galactic Plane Survey for Bright Kuiper Belt Object
  10. 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)



На других языках

[de] (278361) 2007 JJ43

(278361) 2007 JJ43 ist ein großes transneptunisches Objekt im Kuipergürtel, das bahndynamisch als Scattered Disk Object (SDO) eingestuft wird. Aufgrund seiner Größe ist der Asteroid ein Zwergplanetenkandidat.
- [en] (278361) 2007 JJ43

[ru] (278361) 2007 JJ43

(278361) 2007 JJ43 — крупный транснептуновый объект, обращающийся на дальнем краю пояса Койпера[6].


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