astro.wikisort.org - Asteroid

(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.[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] It is possibly large enough to be a dwarf planet.[4]

(574372) 2010 JO₁₇₉

Discovery[1][2]
Discovered by	Pan-STARRS 1
Discovery site	Haleakala Obs.
Discovery date	10 May 2010
Designations
MPC designation	(574372) 2010 JO179
Alternative designations	2010 JO179
Minor planet category	TNO[3] · 5:21 res[4] SDO[5][6] · 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
Semi-major axis	78.793 AU
Eccentricity	0.49755
Orbital period (sidereal)	699.43 yr (255,466 d)
Mean anomaly	35.211°
Mean motion	0° 0m 5.04s / day[3]
Inclination	32.025°
Longitude of ascending node	147.350°
Time of perihelion	1951-Sep-13[7]
Argument of perihelion	10.427°
Physical characteristics
Mean diameter	597 km[8] 735 km[5] 600–900 km[4]
Synodic rotation period	30.6 h[4] 30.6324 h (best fit)[4]
Geometric albedo	0.07 ~ 0.21 (estimated)[4] 0.10 (assumed)[8] 0.09 (assumed)[5]
Spectral type	G–R = 0.88±0.21 (red)[4]
Absolute magnitude (H)	3.44±0.10 (R-band)[4] 4.0[3][1] 4.3 (Brown)[8]

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 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.[4]

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,[5][8] while the discoverers estimate a diameter of 600–900 kilometers with an estimated albedo of 0.21 to 0.07.[4]

References

External links

• MPEC, 18 September 2017
• 1951 precovery images
• (574372) 2010 JO179 at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• (574372) 2010 JO179 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (574372) 2010 JO179

2010 JO179 ist ein transneptunisches Objekt, das als SDO oder als Resonantes KBO (5:21–Resonanz) eingestuft wird. Der Himmelskörper ist derzeit eines der größten Objekte, das von der IAU bislang noch keine Kleinplaneten-Nummer erhalten hat. Aufgrund seiner Größe ist der Asteroid ein Zwergplanetenkandidat.[1]

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- [en] (574372) 2010 JO179

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