astro.wikisort.org - Asteroid

(15430) 1998 UR₃₁ is a main-belt binary asteroid. It was discovered through the Beijing Schmidt CCD Asteroid Program at the Xinglong Station in the Chinese province of Hebei on October 22, 1998.[1] A moon was discovered orbiting the asteroid in 2010. The moon has an orbital period of almost exactly a day, and is tidally locked with the asteroid.[2]

(15430) 1998 UR₃₁

Discovery[1]
Discovered by	SCAP
Discovery site	Beijing Xinglong Obs.
Discovery date	22 October 1998
Designations
MPC designation	(15430) 1998 UR31
Alternative designations	1998 UR31; 1980 EK1 2000 AB153
Minor planet category	main-belt
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc	22044 days (60.35 yr)
Aphelion	2.6001 AU (388.97 Gm)
Perihelion	1.8433 AU (275.75 Gm)
Semi-major axis	2.2217 AU (332.36 Gm)
Eccentricity	0.17032
Orbital period (sidereal)	3.31 yr (1209.6 d)
Mean anomaly	245.22°
Mean motion	0° 17m 51.468s / day
Inclination	8.1801°
Longitude of ascending node	62.806°
Argument of perihelion	177.42°
Earth MOID	0.829914 AU (124.1534 Gm)
Physical characteristics
Synodic rotation period	2.52735 h (0.105306 d)
Absolute magnitude (H)	14.2

See also

• List of minor planets: 15001–16000

References

External links

• Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
• (15430) 1998 UR31 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

---