1623 Vivian
| Discovery [1] | |
|---|---|
| Discovered by | Ernest Johnson |
| Discovery site | Johannesburg Obs. |
| Discovery date | 9 August 1948 |
| Designations | |
| MPC designation | 1623 Vivian |
|
Named after
|
Vivian Hirst (daughter of astronomer) William P. Hirst[2] |
| 1948 PL · 1951 EG2 1954 SA · 1955 YC 1960 WP · 1965 QB 1965 UW · 1973 GG |
|
| main-belt · Themis [3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 67.20 yr (24,545 days) |
| Aphelion | 3.6342 AU |
| Perihelion | 2.6535 AU |
| 3.1439 AU | |
| Eccentricity | 0.1559 |
| 5.57 yr (2,036 days) | |
| 290.66° | |
| Inclination | 2.4903° |
| 115.62° | |
| 316.83° | |
| Physical characteristics | |
| Dimensions | 29.98±1.74 km[4] 27.85±0.35 km[5] 27.04 km (calculated)[3] |
| 20.5209 h[6] 20.5235±0.0005 h[7] |
|
| 0.078±0.010[4] 0.075±0.012[5] 0.08 (assumed)[3] |
|
| C [3] | |
| 11.3 | |
1623 Vivian, provisional designation 1948 PL, is a carbonaceous asteroid from the outer region of the asteroid belt, about 27 kilometers in diameter. It was discovered by South African astronomer Ernest Johnson at Union Observatory, Johannesburg on 9 August 1948.[8]
The asteroid is a member of the Themis family, a large group of asteroids in the outer main-belt. It orbits the Sun at a distance of 2.7–3.6 AU once every 5 years and 7 months (2,036 days). Its orbit shows an eccentricity of 0.16 and is nearly coplanar to the plane of the ecliptic, inclined by 2 degrees, which is typical for Themistian asteroids. The C-type body has a relatively long rotation period of 20.52 hours[6][7] and an albedo of about 0.08.[4][5]
It was named in honor of Vivian Hirst, daughter of British astronomer William P. Hirst, receiver of the Astronomical Society of Southern Africa's Gill Medal and after whom the minor planet 3172 Hirst is named. Hirst calculated the preliminary orbit for this and several other minor planets discovered by Ernest Johnson.[2]
References
- ↑ 1.0 1.1 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.
- ↑ 3.0 3.1 3.2 3.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 4.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 5.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 6.0 6.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 7.0 7.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 1623 Vivian at the JPL Small-Body Database
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