1223 Neckar
| Discovery [1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 6 October 1931 |
| Designations | |
| MPC designation | 1223 Neckar |
|
Named after
|
Neckar (river)[2] |
| 1931 TG · 1930 MN 1931 TA1 · 1953 FC A907 VD · A909 BD A917 XC · A917 YA |
|
| main-belt · Koronis [3] | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 108.44 yr (39609 days) |
| Aphelion | 3.0383 AU (454.52 Gm) |
| Perihelion | 2.7063 AU (404.86 Gm) |
| 2.8723 AU (429.69 Gm) | |
| Eccentricity | 0.057794 |
| 4.87 yr (1778.1 d) | |
| 113.96° | |
| Inclination | 2.5452° |
| 40.822° | |
| 15.058° | |
| Earth MOID | 1.71625 AU (256.747 Gm) |
| Jupiter MOID | 2.17176 AU (324.891 Gm) |
| Physical characteristics | |
| Dimensions | 23.06±0.56 km[4] 25.736±0.261 km[5] 26.07±0.86 km[6] 24.68±0.55 km[7] 27.96 km (derived)[3] |
| 7.81 h (0.325 d)[1][8] 8.6 h[lower-alpha 1] 8.78 h[9] 7.763 h[10] 7.82124 h[11] 7.82401±0.00005 h[12] 7.8273±0.0036 h[13] |
|
| 0.123[14] 0.201±0.011[4] 0.1461±0.0271[5] 0.152±0.025[6] 0.170±0.012[7] |
|
| B–V = 0.840 U–B = 0.405 Tholen = S S [3] |
|
| 10.58 | |
1223 Neckar, provisional designation 1931 TG, is a stony asteroid from the outer region of the asteroid belt, about 26 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany on 6 October 1931.[15]
The S-type asteroid is a member of the Koronis family, thought to have been formed at least two billion years ago in a catastrophic collision between two larger bodies. It orbits the Sun at a distance of 2.7–3.0 AU once every 4 years and 10 months (1,775 days). Its orbit shows an eccentricity of 0.06 and is tilted by 3 degrees to the plane of the ecliptic. It has a rotation period of 7.83 hours, observed by the Palomar Transient Factory Survey in 2010,[13] and an albedo in the range of 0.12 to 0.20, according to the surveys carried out by Akari and WISE/NEOWISE.[4][5][6][7]
The minor planet was named after the 367-kilometre-long river Neckar, running through the southwestern parts of Germany and in particular through the city of Heidelberg, location of the discovering observatory. The river origins in the Black Forrest and flows into the Rhine river.[2]
References
- ↑ Tedesco (1979) web: rotation period 8.6 hours with a brightness amplitude of 0.45 mag. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (1223) Neckar
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External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 1223 Neckar at the JPL Small-Body Database
