Discovery[1] | |
---|---|
Discovered by | K. Reinmuth |
Discovery site | Heidelberg Obs. |
Discovery date | 6 October 1931 |
Designations | |
(1223) Neckar | |
Named after | Neckar[2] (German river) |
1931 TG · 1930 MN 1931 TA1 · 1953 FC A907 VD · A909 BD A917 XC · A917 YA | |
main-belt[1][3] · (outer) Koronis[4][5][6][7] | |
Orbital characteristics[3] | |
Epoch 23 March 2018 (JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 109.58 yr (40,025 d) |
Aphelion | 3.0395 AU |
Perihelion | 2.6977 AU |
2.8686 AU | |
Eccentricity | 0.0596 |
4.86 yr (1,775 d) | |
235.10° | |
0° 12m 10.44s / day | |
Inclination | 2.5448° |
40.812° | |
15.444° | |
Physical characteristics | |
22.783±0.213 km[8] 23.06±0.56 km[9] 24.68±0.55 km[10] 25.736±0.261 km[11] 26.07±0.86 km[12] 27.96 km (derived)[4] | |
7.763 h[13] 7.80±0.06 h[14] 7.81 h[6] 7.82124 h[7] 7.82401±0.00005 h[15] 7.827±0.0036 h[16] 8.6 h (wrong)[a] 8.78 h (wrong)[17] | |
0.123[18] 0.1461±0.0271[11] 0.152±0.025[12] 0.170±0.012[10] 0.201±0.011[9] | |
Tholen = S[3][4] · S[19] B–V = 0.840[3] U–B = 0.405[3] | |
10.16±0.10 (R)[14] 10.304±0.002 (R)[16] 10.51±0.28[19] 10.58[3][9][12][10] 10.66[4][11][17] | |
1223 Neckar, provisional designation 1931 TG, is a stony Koronian asteroid from the outer region of the asteroid belt, approximately 25 kilometers (16 miles) in diameter. Discovered by Karl Reinmuth at Heidelberg Observatory in 1931, the asteroid was named for the German river Neckar. The S-type asteroid has a rotation period of 7.8 hours.[4]
MPC-object
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