astro.wikisort.org - Asteroid

(523727) 2014 NW₆₅, provisional designation: 2014 NW₆₅, is a large centaur from the outer Solar System, approximately 220 kilometers (140 miles) in diameter. It was discovered on 14 July 2010 by astronomers with the Pan-STARRS-1 survey at Haleakala Observatory, Hawaii, in the United States.[1] According to American astronomer Michael Brown, it is "possibly" a dwarf planet.[5] The minor planet was numbered in 2018 and has not been named.

(523727) 2014 NW₆₅

Discovery[1]
Discovered by	Pan-STARRS 1
Discovery site	Haleakala Obs.
Discovery date	14 July 2010
Designations
MPC designation	(523727) 2014 NW65
Minor planet category	centaur[2][3][4] · distant[1]
Orbital characteristics[2]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 2
Observation arc	8.07 yr (2,949 d)
Aphelion	35.111 AU
Perihelion	11.178 AU
Semi-major axis	23.145 AU
Eccentricity	0.5170
Orbital period (sidereal)	111.35 yr (40,670 d)
Mean anomaly	298.27°
Mean motion	0° 0m 32.04s / day
Inclination	20.461°
Longitude of ascending node	215.80°
Argument of perihelion	233.29°
Physical characteristics
Mean diameter	212 km[3] 225 km[5]
Geometric albedo	0.08 (est.)[5] 0.09 (est.)[3]
Absolute magnitude (H)	6.6[1][2] 6.7[5]

Orbit and classification

2014 NW₆₅ is a member of the centaurs, an inward-moving population of bodies transiting from the Kuiper belt to the group of Jupiter-family comets. Their eccentric orbits are often in between those of Jupiter and Neptune, that is, they have a semi-major axis of typically 5.5 to 30.1 AU. Centaurs are cometary-like bodies. They have a short dynamical lifetime due to the perturbing forces exerted on them by the Solar System's outer planets.

It orbits the Sun at a distance of 11.2–35.1 AU once every 111 years and 4 months (40,670 days; semi-major axis of 23.15 AU). Its orbit has an eccentricity of 0.52 and an inclination of 20° with respect to the ecliptic.[2] The body's observation arc begins with its official discovery observation in July 2010.[1]

Numbering and naming

This minor planet was numbered by the Minor Planet Center on 25 September 2018, receiving the number (523727) in the minor planet catalog (M.P.C. 111779).[6] As of 2021^[update], it has not been named.[1] According to the established naming conventions, it will be named after one of the many centaurs from Greek mythology, which are creatures with the upper body of a human and the lower body and legs of a horse.[7]

Physical characteristics

Diameter and albedo

2014 NW₆₅ has an absolute magnitude of 6.6.[1] According to the Johnston's archive and astronomer Michael Brown, it measures 212 and 225 kilometers in diameter, based on an assumed albedo for the body's surface of 0.09 and 0.08, respectively.[3][5] It is one of the largest centaurs, comparable in size with 2060 Chiron, 10199 Chariklo, and 54598 Bienor.

According to Brown, 2014 NW₆₅ is "possibly" a dwarf planet, which is the weakest of the 5 categories established by the astronomer.[5] As of 2021^[update], no physical characteristics have been determined from photometric observations. The body's color, rotation period, pole and shape remain unknown.[2][8]

See also

• List of centaurs (small Solar System bodies) § 523727

References

External links

• List Of Centaurs and Scattered-Disk Objects, Minor Planet Center
• (523727) 2014 NW65 at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• (523727) 2014 NW65 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (523727) 2014 NW65

(523727) 2014 NW65 ist ein Planetoid, der am 2. Juli 2014 am Pan-STARRS 1 entdeckt wurde und zur Gruppe der Zentauren gehört. Der Asteroid läuft auf einer mäßig exzentrischen Bahn in 111 Jahren um die Sonne. Die Bahnexzentrizität seiner Bahn beträgt 0,52, wobei diese 20,46° gegen die Ekliptik geneigt ist.[1]

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- [en] (523727) 2014 NW65

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