(385185) 1993 RO is a
plutino
In astronomy, the plutinos are a dynamical group of trans-Neptunian objects that orbit in 2:3 mean-motion resonance with Neptune. This means that for every two orbits a plutino makes, Neptune orbits three times. The dwarf planet Pluto is the la ...
. It was the first plutino discovered after
Pluto
Pluto (minor-planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of Trans-Neptunian object, bodies beyond the orbit of Neptune. It is the ninth-largest and tenth-most-massive known object to directly orbit the Su ...
itself, with
1993 RP and
(15788) 1993 SB
(15788) 1993 SB is a trans-Neptunian object of the plutino class. Apart from Pluto, it was one of the first such objects discovered (beaten by two days by (385185) 1993 RO and by one day by 1993 RP), and the first to have an orbit calculated well ...
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.
Other Kuiper belt objects discovered in 1993 include
(15788) 1993 SB
(15788) 1993 SB is a trans-Neptunian object of the plutino class. Apart from Pluto, it was one of the first such objects discovered (beaten by two days by (385185) 1993 RO and by one day by 1993 RP), and the first to have an orbit calculated well ...
,
(15789) 1993 SC, and
(181708) 1993 FW
(181708) 1993 FW (Minor planet provisional designation, provisional designation ) is a cubewano and was the second trans-Neptunian object to be discovered after Pluto and Charon (moon), Charon, the first having been 15760 Albion, formerly known as ...
.
See also
*
List of trans-Neptunian objects
This is a list of trans-Neptunian objects (TNOs), which are minor planets in the Solar System that orbit the Sun at a greater distance on average than Neptune, that is, their orbit has a semi-major axis greater than 30.1 astronomical units (AU) ...
*
Kuiper belt
The Kuiper belt ( ) is a circumstellar disc in the outer Solar System, extending from the orbit of Neptune at 30 astronomical units (AU) to approximately 50 AU from the Sun. It is similar to the asteroid belt, but is far larger—20 times ...
References
External links
IAUC 5865: 1993 RO*
385185
Discoveries by David C. Jewitt
Discoveries by Jane Luu
19930914
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