160 Una
From Infogalactic: the planetary knowledge core
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A three-dimensional model of 160 Una based on its light curve.
|
|
| Discovery | |
|---|---|
| Discovered by | C. H. F. Peters |
| Discovery date | February 20, 1876 |
| Designations | |
| Main belt | |
| Orbital characteristics[1] | |
| Epoch January 30, 2005 (JD 2453400.5) | |
| Aphelion | 435.556 Gm (2.912 AU) |
| Perihelion | 380.561 Gm (2.544 AU) |
| 408.058 Gm (2.728 AU) | |
| Eccentricity | 0.067 |
| 1645.485 d (4.51 a) | |
|
Average orbital speed
|
18.01 km/s |
| 308.565° | |
| Inclination | 3.824° |
| 8.856° | |
| 49.974° | |
| Physical characteristics | |
| Dimensions | 81.2 km |
| Mass | 5.6×1017 kg (assumed) |
|
Mean density
|
2.0? g/cm³ |
| 0.0227 m/s² | |
| 0.0429 km/s | |
| 0.234 d (5.61[2] h) 1 | |
| Albedo | 0.063 3 |
| Temperature | ~170 K |
|
Spectral type
|
C 2 |
| 8.95[3] | |
160 Una is a fairly large and dark, primitive Main belt asteroid that was discovered by German-American astronomer C. H. F. Peters on February 20, 1876, in Clinton, New York.[4] It is named after a character in Edmund Spenser's epic poem The Faerie Queene (1590).
In the Tholen classification system it is categorized as a CX-type, while the Bus asteroid taxonomy system lists it as an Xk asteroid.[5] Photometric observations of this asteroid made at the Torino Observatory in Italy during 1990–1991 were used to determine a synodic rotation period of 5.61 ± 0.01 hours.[2]
References
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found. See appendix A.
External links
- Orbital simulation from JPL (Java) / Ephemeris
- 2011-Jan-24 Occultation / (2011 Asteroidal Occultation Results for North America)
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