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10370 Hylonome facts for kids

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10370 Hylonome
10370 Hylonome Hubble.jpg
Hubble Space Telescope image of Hylonome taken in 2009
Discovered by D. C. Jewitt
J. X. Luu
Discovery site Mauna Kea Obs.
Discovery date 27 February 1995
MPC designation (10370) Hylonome
Named after
Ὑλονόμη Hylonomē
(Greek mythology)
1995 DW2
centaur · distant
Orbital characteristics
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 3
Observation arc 15.27 yr (5,576 days)
Aphelion 31.393 AU
Perihelion 18.910 AU
25.152 AU
Eccentricity 0.2482
126.14 yr (46,073 days)
Mean motion
0° 0m 28.08s / day
Inclination 4.1443°
Jupiter MOID 13.4570 AU
TJupiter 4.4550
Physical characteristics
Mean diameter
70±20 km
74±16 km
BR (intermed. blue-red)
8.6 · 9.08±0.04 (R) · 9.250±0.131 (R) · 9.35 · 9.51±0.08 · 9.53

10370 Hylonome is an asteroid orbiting in the farther part of the solar system. It belongs to the group of icy minor planets called centaurs, with an orbit that crosses the orbits of Neptune and Uranus. It was found on February 27, 1995.

Sightings with the Spitzer Space Telescope show that it's diameter is about 70 km (43 miles) plus or minus 20 km (50 to 90 km in diameter), or a 35 km radius.


This minor planet was named for Hylonome, a female centaur in Greek mythology. In the epic tragedy, she lost her very much beloved husband, the handsome centaur Cyllarus, who was accidentally killed by a spear. Heartbroken, she then took her own life to join him by throwing herself on the spear. The official naming citation was published on 26 July 2000 (M.P.C. 41030).

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