160 Una
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|
| Discovery A (http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html) | |
|---|---|
| Discoverer | C. H. F. Peters |
| Discovery date | February 20, 1876 |
| Alternate designations | B (http://cfa-www.harvard.edu/iau/MPDes.html) |
| Category | Main belt |
| Orbital elements C (http://asteroid.lowell.edu/) Epoch January 30, 2005 (JD 2453400.5) | |
| Eccentricity (e) | 0.067 |
| Semi-major axis (a) | 408.058 Gm (2.728 AU) |
| Perihelion (q) | 380.561 Gm (2.544 AU) |
| Aphelion (Q) | 435.556 Gm (2.912 AU) |
| Orbital period (P) | 1645.485 d (4.51 a) |
| Mean orbital speed | 18.01 km/s |
| Inclination (i) | 3.824° |
| Longitude of the ascending node (Ω) | 8.856° |
| Argument of perihelion (ω) | 49.974° |
| Mean anomaly (M) | 308.565° |
| Physical characteristics | |
| Dimensions | 81.2 km |
| Mass | 5.6×1017 kg |
| Density | 2.0? g/cm³ |
| Surface gravity | 0.0227 m/s² |
| Escape velocity | 0.0429 km/s |
| Rotation period | 0.234 d (5.61 h) 1 (http://www.astrosurf.com/aude-old/map_files/AstVarMAP01-2003.htm) |
| Spectral class | C 2 (http://spiff.rit.edu/richmond/parallax/phot/LCSUMPUB.TXT) |
| Absolute magnitude | 9.08 |
| Albedo | 0.063 3 (http://dorothy.as.arizona.edu/DSN/IRAS/index_iras.html) |
| Mean surface temperature | ~170 K |
160 Una is a fairly large and dark, primitive Main belt asteroid.
It was discovered by C. H. F. Peters on February 20, 1876 and named after a character in Edmund Spenser's epic poem The Faerie Queene (1590).
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