(2154) Underhill
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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 .