250 Bettina
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| Discovery A | |
|---|---|
| Discoverer | Johann Palisa |
| Discovery date | September 3, 1885 |
| Alternate designations B |
n/a |
| Category | Main belt |
| Orbital elements C | |
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| Eccentricity (e) | 0.125 |
| Semi-major axis (a) | 471.291 Gm (3.15 AU) |
| Perihelion (q) | 412.522 Gm (2.758 AU) |
| Aphelion (Q) | 530.06 Gm (3.543 AU) |
| Orbital period (P) | 2042.375 d (5.59 a) |
| Mean orbital speed | 16.78 km/s |
| Inclination (i) | 12.844° |
| Longitude of the ascending node (Ω) |
24.1° |
| Argument of perihelion (ω) |
75.087° |
| Mean anomaly (M) | 37.531° |
| Physical characteristics D | |
| Dimensions | 80.0 km |
| Mass | unknown |
| Density | unknown |
| Surface gravity | unknown |
| Escape velocity | unknown |
| Rotation period | 5.054 h |
| Spectral class | M |
| Absolute magnitude | 7.58 |
| Albedo (geometric) | 0.258 |
| Mean surface temperature |
unknown |
250 Bettina is a large Main belt asteroid. It is classified as an M-type asteroid.
It was discovered by Johann Palisa on September 3, 1885 in Vienna. It was named in honour of Baroness Bettina von Rothschild, the wife of the prominent Viennese banker Albert Salomon von Rothschild who had bought the naming rights for £50[1].
[edit] References
- ^ The Guinness Book of Astronomy Facts and Feats Patrick Moore page 96 ISBN 0-900424-76-1
- The Asteroid Orbital Elements Database
- Minor Planet Discovery Circumstances
- Asteroid Lightcurve Data File
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