(42301) 2001 UR163

(42301) 2001 UR163 (provisional designation 2001 UR163) is a resonant trans-Neptunian object and possible dwarf planet located in the outermost region of the Solar System. The object measures approximately 352 kilometers (220 miles) in diameter with a high albedo and stays in an uncommon orbital resonance (4:9) with Neptune. It was discovered on 21 October 2001 by astronomers of the Deep Ecliptic Survey program at Kitt Peak National Observatory near Tucson, Arizona, United States. As of 2021, it has not been named.

(42301) 2001 UR163
Hubble Space Telescope image of 2001 UR163 taken in 2005
Discovery
Discovered byDES
Discovery siteKitt Peak National Obs.
Discovery date21 October 2001
Designations
MPC designation
(42301) 2001 UR163
Alternative designations
2001 UR163
Minor planet category
TNO · 4:9 res
distant
Orbital characteristics
Epoch 1 July 2021 (JD 2459396.5)
Uncertainty parameter 2
Observation arc38.45 yr (14,045 d)
Aphelion66.643 AU
Perihelion36.987 AU
Semi-major axis
51.815 AU
Eccentricity0.2862
Orbital period (sidereal)
372.98 yr (136,232 d)
Mean anomaly
80.814°
Mean motion
0° 0m 9.36s / day
Inclination0.7531°
Longitude of ascending node
301.39°
8 October 1937
344.50°
Physical characteristics
Mean diameter
352±85 km:26
0.209±0.08
  • RR-U (very red)
  • B–V = 1.25±0.11
  • V–R = 0.88±0.06
  • V–I = 1.54±0.16
21.3
4.21
    This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.