(385185) 1993 RO

(385185) 1993 RO is a plutino. It was the first plutino discovered after Pluto itself, with 1993 RP and (15788) 1993 SB a day and two days later, respectively. The discovery was made in 1993 at the Mauna Kea Observatory with a 2.2-meter telescope. Very little is known about (385185) 1993 RO. The diameter estimate of ~90 km is based on the assumed albedo of 0.09.^[2]

(385185) 1993 RO

Discovery
Discovered by	David C. Jewitt Jane Luu
Discovery date	14 September 1993
Designations
Alternative designations	1993 RO
Minor planet category	Plutino (TNO)
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 4
Observation arc	6997 days (19.16 yr)
Earliest precovery date	10 August 1994
Aphelion	46.776 AU (6.9976 Tm)
Perihelion	31.492 AU (4.7111 Tm)
Semi-major axis	39.134 AU (5.8544 Tm)
Eccentricity	0.19528
Orbital period (sidereal)	244.81 yr (89418.1 d)
Mean anomaly	26.984°
Mean motion	0.0040260°/day
Inclination	3.7196°
Longitude of ascending node	170.4038°
Argument of perihelion	188.41°
Earth MOID	30.4867 AU (4.56075 Tm)
Jupiter MOID	26.5264 AU (3.96829 Tm)
Physical characteristics
Dimensions	~92 km[2]
Geometric albedo	0.09 (assumed)
Absolute magnitude (H)	8.4

Other Kuiper belt objects discovered in 1993 include (15788) 1993 SB, (15789) 1993 SC, and (181708) 1993 FW.

See also

• Astronomy portal

• List of trans-Neptunian objects
• Kuiper belt