Global Information2830 Greenwich information
 Shape model of Greenwich from its lightcurve | |
| Discovery [1] | |
|---|---|
| Discovered by | E. Bowell |
| Discovery site | Anderson Mesa Stn. |
| Discovery date | 14 April 1980 |
| Designations | |
MPC designation | (2830) Greenwich |
Named after | Royal Greenwich Observatory (historical observatory)[2] |
Alternative designations | 1980 GA · 1969 KC 1978 VZ14 |
Minor planet category | main-belt · Phocaea [3][4] |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 47.96 yr (17,517 days) |
| Aphelion | 2.8663 AU |
| Perihelion | 1.8899 AU |
Semi-major axis | 2.3781 AU |
| Eccentricity | 0.2053 |
Orbital period (sidereal) | 3.67 yr (1,340 days) |
Mean anomaly | 81.928° |
Mean motion | 0° 16m 7.68s / day |
| Inclination | 25.355° |
Longitude of ascending node | 49.015° |
Argument of perihelion | 141.10° |
| Physical characteristics | |
Mean diameter | 7.892±0.100[5] 9.197±0.064 km[6] 9.25 km (taken)[3] 9.252 km[7] 9.50±0.43 km[8] |
Synodic rotation period | 24 h[9] |
Geometric albedo | 0.172±0.027[8][5] 0.1846±0.0451[6] 0.1865[7] |
Spectral type | Tholen = S [1] · S [3] B–V = 0.867[1] U–B = 0.441[1] |
Absolute magnitude (H) | 12.55±0.51[10] · 12.61[3][7][11] · 12.64[1][6][8] |
2830 Greenwich (prov. designation: 1980 GA) is a bright Phocaea asteroid from the inner regions of the asteroid belt. It was discovered on 14 April 1980, by American astronomer Edward Bowell at Lowell's U.S. Anderson Mesa Station, Arizona, and named for the historical Royal Greenwich Observatory in England.[2][12] The stony S-type asteroid has a long rotation period of 24 hours and measures approximately 9 kilometers (5.6 miles) in diameter
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