Astronomy:(574372) 2010 JO179

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(574372) 2010 JO179
Discovery[1][2]
Discovered byPan-STARRS 1
Discovery siteHaleakala Obs.
Discovery date10 May 2010
Designations
(574372) 2010 JO179
2010 JO179
Minor planet categoryTNO[3] · SDO[4][5] · 5:21 res.[6]
p-DP · distant[1]
Orbital characteristics[3]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 2
Observation arc69.54 yr (25,399 days)
Earliest precovery date4 February 1951 (POSS-I)[1]
|{{{apsis}}}|helion}}117.997 AU
|{{{apsis}}}|helion}}39.590 AU
78.793 AU
Eccentricity0.49755
Orbital period699.43 yr (255,466 d)
Mean anomaly35.211°
Mean motion0° 0m 5.04s / day[3]
Inclination32.025°
Longitude of ascending node147.350°
|{{{apsis}}}|helion}}1951-Sep-13[7]
10.427°
Physical characteristics
Mean diameter597 km[8]
735 km[4]
600–900 km[6]
Rotation period30.6 h[6]
30.6324 h (best fit)[6]
Geometric albedo0.07 ~ 0.21 (estimated)[6]
0.10 (assumed)[8]
0.09 (assumed)[4]
G–R = 0.88±0.21 (red)[6]
Absolute magnitude (H)3.44±0.10 (R-band)[6]
4.0[3][1]
4.3 (Brown)[8]


(574372) 2010 JO179 (provisional designation 2010 JO179) is a large, high-order resonant trans-Neptunian object in the outermost regions of the Solar System, approximately 700 kilometers (430 miles) in diameter.[6] Long-term observations suggest that the object is in a meta-stable 5:21 resonance with Neptune.[6] Other sources classify it as a scattered disc object.[4][5] It is possibly large enough to be a dwarf planet.[6]

First observation and orbit

The libration of 2010 JO179's nominal orbit, in a frame co-rotating with Neptune (click image to view animation)

The Minor Planet Center credits the object's first official observation on 10 May 2010 to Pan-STARRS (F51) at Haleakala Observatory, Hawaii, United States.[1][2] The observations were made by Pan-STARRS' Outer Solar System Survey.[6] There are 4 February 1951 precovery images from the Palomar Observatory Sky Survey, extending the observation arc by approximately 60 years.[1] The precovery images are from the same year the object came to perihelion (closest approach to the Sun).

2010 JO179 orbits the Sun at a distance of 39.6–118 AU once every 699 years and 5 months (semi-major axis of 78.8 AU). Its orbit has a high eccentricity of 0.50 and an inclination of 32° with respect to the ecliptic.[3]

Numbering and naming

This minor planet was numbered by the Minor Planet Center on 10 August 2021, receiving the number (574372) in the minor planet catalog (M.P.C. 133504).[9] (As of 2021), it has not been named.[1]

Physical characteristics

Photometry

Photometric observations of 2010 JO179 gave a monomodal lightcurve with slow rotation period of 30.6 hours, suggesting a rather spherical shape with significant albedo patchiness. An alternative period solution of a bimodal lightcurve is considered less likely. It would double the period and imply an ellipsoidal shape with an axis-ratio of at least 1.58.[6]

Diameter and albedo

The object's mean diameter has been estimated to measure 574 and 735 kilometers, with an assumed albedo of 0.09, by Michael Brown and the Johnston's Archive respectively,[4][8] while the discoverers estimate a diameter of 600–900 kilometers with an estimated albedo of 0.21 to 0.07.[6]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "2010 JO179". Minor Planet Center. http://www.minorplanetcenter.net/db_search/show_object?object_id=2010+JO179. Retrieved 27 August 2020. 
  2. ↑ 2.0 2.1 "MPEC 2017-S54 : 2010 JO179". Minor Planet Center. 18 September 2017. https://minorplanetcenter.net/mpec/K17/K17S54.html. Retrieved 21 February 2018. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 "JPL Small-Body Database Browser: (2010 JO179)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3781468. Retrieved 28 August 2020. 
  4. ↑ 4.0 4.1 4.2 4.3 4.4 Johnston, Wm. Robert (15 October 2017). "List of Known Trans-Neptunian Objects". Johnston's Archive. http://www.johnstonsarchive.net/astro/tnoslist.html. Retrieved 15 December 2017. 
  5. ↑ 5.0 5.1 "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. http://www.minorplanetcenter.org/iau/lists/Centaurs.html. Retrieved 15 December 2017. 
  6. ↑ 6.00 6.01 6.02 6.03 6.04 6.05 6.06 6.07 6.08 6.09 6.10 6.11 6.12 Holman, Matthew J.; Payne, Matthew J.; Fraser, Wesley; Lacerda, Pedro; Bannister, Michele T.; Lackner, Michael et al. (2018). "A dwarf planet class object in the 21:5 resonance with Neptune". The Astrophysical Journal 855 (1): L6. doi:10.3847/2041-8213/aaadb3. Bibcode: 2018ApJ...855L...6H. 
  7. ↑ "Horizons Batch for 574372 (2010 JO179) on 1951-Sep-13". JPL Horizons. https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%272010+JO179%27&START_TIME=%271951-Sep-01%27&STOP_TIME=%271951-Sep-30%27&STEP_SIZE=%273%20hours%27&QUANTITIES=%2719%27. Retrieved 2021-09-21.  (JPL#8/Soln.date: 2021-Aug-26)
  8. ↑ 8.0 8.1 8.2 8.3 Michael E. Brown. "How many dwarf planets are there in the outer solar system?". California Institute of Technology. http://web.gps.caltech.edu/~mbrown/dps.html. Retrieved 15 December 2017. 
  9. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. Retrieved 21 August 2021. 

External links



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