1993 RO

Infobox Planet | discovery=yes | physical_characteristics=yes | bgcolour=#FFFFC0
name=1993 RO
discoverer=David C. Jewitt and Jane X. Luu,
discovered=September 14, 1993
mp_name="none"
alt_names=1993 RO
mp_category=Plutino (TNO)
epoch=March 6, 2006 (JD 2453800.5)
semimajor=5,841.0 Gm (39.045 AU)
perihelion=4,706.6 Gm (31.462 AU)
aphelion=6,975.4 Gm (46.628 AU)
eccentricity=0.194
period=89,114 d (243.98 a)
inclination=3.7°
asc_node=170.4°
arg_peri=188.0°
mean_anomaly=12.8°
avg_speed=4.72 km/s
dimensions=90? km ^{[http://neo.jpl.nasa.gov/glossary/h.html H]}
mass=~8×10¹⁷ kg
density=2.0? g/cm³
surface_grav=~0.03 m/s²
escape_velocity=~0.05 km/s
sidereal_day=? d
spectral_type=?
abs_magnitude=8.4
albedo=0.09?
single_temperature=~45 K

1993 RO is a trans-Neptunian object of the plutino class. It was the first plutino discovered after Pluto itself, with 1993 RP and (15788) 1993 SB a day and two days behind. The discovery was made in 1993 at the Mauna Kea Observatory with a 2.2m telescope. Very little is known about the object. Even the diameter estimate of ~90 km is based on the guess of an albedo of 0.09 [http://www.johnstonsarchive.net/astro/tnoslist.html] .

External links

* [http://cfa-www.harvard.edu/iauc/05800/05865.htm#Item1 Discovery IAUC listing]
* [http://cfa-www.harvard.edu/mpec/J93/J94V04.html further MPEC]
* [http://cfa-www.harvard.edu/mpec/J94/J94R06.html further MPEC]
* [http://www.johnstonsarchive.net/astro/tnoslist.html list of known TNOs, including size estimates]
* [http://cfa-www.harvard.edu/iau/lists/MPLists.html IAU minor planet lists]
* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=1993RO;orb=1;view=Far Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=1993RO Ephemeris]