| Discovery [1] [2] | |
|---|---|
| Discovered by | Pan-STARRS 1 |
| Discovery site | Haleakala Obs. |
| Discovery date | 10 May 2010 |
| Designations | |
| (574372) 2010 JO179 | |
| 2010 JO179 | |
|
TNO
[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 arc | 69.54 yr (25,399 days) |
| Earliest precovery date | 4 February 1951 ( POSS-I) [1] |
| Aphelion | 117.997 AU |
| Perihelion | 39.590 AU |
| 78.793 AU | |
| Eccentricity | 0.49755 |
| 699.43 yr (255,466 d) | |
| 35.211 ° | |
| 0° 0m 5.04s / day [3] | |
| Inclination | 32.025° |
| 147.350° | |
| 1951-Sep-13 [7] | |
| 10.427° | |
| Physical characteristics | |
| 597
km
[8] 735 km [4] 600–900 km [6] | |
| 30.6
h
[6] 30.6324 h (best fit) [6] | |
| 0.07 ~ 0.21 (estimated)
[6] 0.10 (assumed) [8] 0.09 (assumed) [4] | |
| G–R = 0.88±0.21 ( red) [6] | |
| 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 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 [update], 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
- ^ a b c d e f g "2010 JO179". Minor Planet Center. Retrieved 27 August 2020.
- ^ 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)" (2020-08-19 last obs.). Jet Propulsion Laboratory. Retrieved 28 August 2020.
- ^ 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 g h i j k l m 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. arXiv: 1709.05427. Bibcode: 2018ApJ...855L...6H. doi: 10.3847/2041-8213/aaadb3. S2CID 55279330.
- ^ "Horizons Batch for 574372 (2010 JO179) on 1951-Sep-13" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved 21 September 2021. (JPL#8/Soln.date: 2021-Aug-26)
- ^ a b c d Michael E. Brown. "How many dwarf planets are there in the outer solar system?". California Institute of Technology. Retrieved 15 December 2017.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 21 August 2021.
External links
- MPEC, 18 September 2017
- 1951 precovery images
- (574372) 2010 JO179 at AstDyS-2, Asteroids—Dynamic Site
- (574372) 2010 JO179 at the JPL Small-Body Database
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