(2154) Underhill
Asteroid (2154) Underhill |
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Properties of the orbit ( animation ) | |
Orbit type | Main belt asteroid |
Major semi-axis | 2.6349 AU |
eccentricity | 0.1246 |
Perihelion - aphelion | 2.3066 AU - 2.9632 AU |
Inclination of the orbit plane | 7.756 ° |
Sidereal period | 4,277 a |
Mean orbital velocity | 18.35 km / s |
Physical Properties | |
Medium diameter | 21 km |
Dimensions | ? | kg
Albedo | ? |
Medium density | ? g / cm³ |
Rotation period | ? H |
Absolute brightness | 12.71 mag |
Spectral class | ? |
history | |
Explorer |
CJ and I. van Houten-Groeneveld , T. Gehrels |
Date of discovery | September 24, 1960 |
Another name | 2015 PL, 1958 GU, 1973 SN 4 |
Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. |
(2154) Underhill is an asteroid of the main belt that was discovered on September 24, 1960 by the Dutch research team Cornelis Johannes van Houten , Ingrid van Houten-Groeneveld and Tom Gehrels as part of the Palomar-Leiden survey .
The name of the asteroid is derived from the Canadian astrophysicist Anne B. Underhill .