(574372) 2010 JO179
| Discovery [1][2] | |
|---|---|
| Discovered by | Pan-STARRS 1 |
| Discovery site | Haleakala Obs. |
| Discovery date | 10 May 2010 (first observed only) |
| Designations | |
| 2010 JO179 | |
| TNO [3] · 5:21 res [4] SDO [5][6] · distant [1] p-DP [7] | |
| Orbital characteristics [3] | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 2 | |
| Observation arc | 12.32 yr (4,501 days) |
| Earliest precovery date | 11 May 2005 (SDSS)[1] |
| Aphelion | 118.674 AU |
| Perihelion | 39.608 AU |
| 79.141 AU | |
| Eccentricity | 0.49953 |
| 704.06 yr (256,982 d) | |
| 34.325° | |
| 0° 0m 5.04s / day[3] | |
| Inclination | 32.033° |
| 147.262° | |
| 10.704° | |
| Physical characteristics | |
Mean diameter | 597 km[7] 702 km[5] 600–900 km[4] |
| 30.6 h[4] 30.6324 h (best fit)[4] | |
| 0.07 ~ 0.21 (estimated)[4] 0.10 (assumed)[7] 0.09 (assumed)[5] | |
| G–R = 0.88±0.21 (red)[4] | |
| 3.44±0.10 (R-band)[4] 4.0[3][1] 4.3 (Brown)[7] | |
2010 JO179 is a high-order resonant trans-Neptunian object and a likely dwarf-planet candidate from the outermost regions of the Solar System, approximately 700 kilometers in diameter.[4] Long-term observations suggest that the object is in a meta-stable 5:21 resonance with Neptune.[4] Other sources classify it as a scattered disc object.[5][6]
First observation and orbit
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.[4] There are 11 May 2005 precovery images from the Sloan Digital Sky Survey, approximately doubling the observation arc.[1]
2010 JO179 orbits the Sun at a distance of 39.5–119 AU once every 706 years and 1 month (semi-major axis of 79.3 AU). Its orbit has a high eccentricity of 0.50 and an inclination of 32° with respect to the ecliptic.[3]
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.[4]
Diameter and albedo
The object's mean diameter has been estimated to measure 574 and 702 kilometers, with an assumed albedo of 0.09, by Michael Brown and the Johnston's Archive respectively,[5][7] while the discoverers estimate a diameter of 600–900 kilometers with an estimated albedo of 0.21 to 0.07.[4] In his classification scheme, astronomer Michael Brown considers this object a likely dwarf planet, rather than a "highly likely" one, as his diameter-estimate is below the 600-kilometer mark.[7]
Numbering and naming
As of 2018, this minor planet has not been numbered or named.[1]
References
- ^ a b c d e f g "2010 JO179". Minor Planet Center. Retrieved 21 February 2018.
- ^ a b "MPEC 2017-S54 : 2010 JO179". Minor Planet Center. 18 September 2017. Retrieved 21 February 2018.
- ^ a b c d e "JPL Small-Body Database Browser: (2010 JO179)" (2016-07-30 last obs.). Jet Propulsion Laboratory. Retrieved 21 February 2018.
- ^ a b c d e f g h i j k l Holman, Matthew J.; Payne, Matthew J.; Fraser, Wesley; Lacerda, Pedro; Bannister, Michele T.; Lackner, Michael; et al. (September 2017). "A dwarf planet class object in the 21:5 resonance with Neptune". arXiv:1709.05427 [astro-ph.EP].
- ^ a b c d e Johnston, Wm. Robert (15 October 2017). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 15 December 2017.
- ^ a b "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. Retrieved 15 December 2017.
- ^ a b c d e f Michael E. Brown. "How many dwarf planets are there in the outer solar system?". California Institute of Technology. Retrieved 15 December 2017.
External links
- MPEC, 18 September 2017
- (574372) 2010 JO179 at AstDyS-2, Asteroids—Dynamic Site
- (574372) 2010 JO179 at the JPL Small-Body Database
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