261 Prymno
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| Discovery | |
|---|---|
| Discovered by | C. H. F. Peters |
| Discovery date | October 31, 1886 |
| Designations | |
| Alternative names | n/a |
| Minor planet category | Main belt |
| Orbital characteristics | |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 380.063 Gm (2.541 AU) |
| Perihelion | 317.429 Gm (2.122 AU) |
| Semi-major axis | 348.746 Gm (2.331 AU) |
| Eccentricity | 0.09 |
| Orbital period | 1300.07 d (3.56 a) |
| Average orbital speed | 19.51 km/s |
| Mean anomaly | 313.525° |
| Inclination | 3.635° |
| Longitude of ascending node | 96.779° |
| Argument of perihelion | 65.502° |
| Physical characteristics | |
| Dimensions | 51.0 km |
| Mass | unknown |
| Mean density | unknown |
| Equatorial surface gravity | unknown |
| Escape velocity | unknown |
| Rotation period | 8.002 h |
| Albedo | 0.114 |
| Temperature | unknown |
| Spectral type | B |
| Absolute magnitude (H) | 9.44 |
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261 Prymno is a somewhat large Main belt asteroid. It is classified as a B-type asteroid and probably has a primitive composition not unlike common C-type carbonaceous asteroids.
It was discovered by C. H. F. Peters on October 31, 1886 in Clinton, New York and was named after the Greek Oceanid Prymno.
References
- The Asteroid Orbital Elements Database
- Minor Planet Discovery Circumstances
- Asteroid Lightcurve Data File
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