101 Helena
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|
| Orbital characteristics 1 (ftp://ftp.lowell.edu/pub/elgb/astorb.html) | |
|---|---|
| Orbit type | Main belt |
| Semimajor axis | 2.583 AU |
| Perihelion distance | 2.218 AU |
| Aphelion distance | 2.947 AU |
| Orbital period | 4.15 years |
| Inclination | 10.20° |
| Eccentricity | 0.141 |
| Physical characteristics 1 (ftp://ftp.lowell.edu/pub/elgb/astorb.html) | |
| Diameter | 65.8 km |
| Rotation period | 23.08 hours |
| Spectral class | S |
| Abs. magnitude | 8.33 |
| Albedo 4 (http://dorothy.as.arizona.edu/DSN/IRAS/index_iras.html) | 0.190 |
| History 2 (http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html) | |
| Discoverer | J. C. Watson, 1868 |
101 Helena is a fairly large, rocky Main belt asteroid.
It was discovered by J. C. Watson on August 15, 1868.
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