(120178) 2003 OP32

(120178) 2003 OP₃₂, also written as (120178) 2003 OP32, is a trans-Neptunian object (TNO) that resides in the Kuiper belt. It was discovered on July 26, 2003 by Michael E. Brown, Chad Trujillo and David L. Rabinowitz at Palomar Mountain in California.

(120178) 2003 OP₃₂

(120178) 2003 OP32 among other Haumea family objects
Discovery
Discovered by	M. E. Brown, C. Trujillo, D. Rabinowitz[1]
Discovery date	26 July 2003
Designations
MPC designation	(120178) 2003 OP32
Minor planet category	Cubewano (MPC)[2] Extended (DES)[3]
Orbital characteristics[4]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Observation arc	9205 days (25.20 yr)
Aphelion	47.620 AU (7.1239 Tm)
Perihelion	38.480 AU (5.7565 Tm)
Semi-major axis	43.050 AU (6.4402 Tm)
Eccentricity	0.10615
Orbital period (sidereal)	282.47 yr (103172 d)
Average orbital speed	4.51 km/s
Mean anomaly	71.841°
Mean motion	0° 0m 12.561s / day
Inclination	27.219°
Longitude of ascending node	182.930°
Argument of perihelion	67.082°
Jupiter MOID	33.5815 AU (5.02372 Tm)
TJupiter	5.208
Physical characteristics
Dimensions	230 km[5][6]
Synodic rotation period	9.71 h (0.405 d)
Sidereal rotation period	8.45 h[7]
Geometric albedo	0.7 (assumed)
Temperature	~42 K
Spectral type	(Neutral) B−V=0.70, V-R=0.39[8] B0-V0=0.698[7]
Absolute magnitude (H)	3.8[4]

Origin

Main article: Haumea family

Based on their common pattern of infrared water-ice absorption and the clustering of their orbital elements,^[9] the other KBOs 1995 SM₅₅, (19308) 1996 TO66, (55636) 2002 TX300 and (145453) 2005 RR43, among others, appear to be collisional fragments broken off the dwarf planet Haumea. The neutral color of the spectrum of these objects in the visible range evidences a lack of complex organics on the surface of these bodies that has been studied in detail for the surface of Haumea.^[10]