1223 Neckar

1223 Neckar
Shape model of Neckar from its lightcurve
Discovery[1]
Discovered byK. Reinmuth
Discovery siteHeidelberg Obs.
Discovery date6 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 arc109.58 yr (40,025 d)
Aphelion3.0395 AU
Perihelion2.6977 AU
2.8686 AU
Eccentricity0.0596
4.86 yr (1,775 d)
235.10°
0° 12m 10.44s / day
Inclination2.5448°
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]

  1. ^ a b Cite error: The named reference MPC-object was invoked but never defined (see the help page).
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  6. ^ a b Cite error: The named reference Slivan-1996 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Slivan-2003b was invoked but never defined (see the help page).
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  17. ^ a b Cite error: The named reference Binzel-1987b was invoked but never defined (see the help page).
  18. ^ Cite error: The named reference Morrison-1979 was invoked but never defined (see the help page).
  19. ^ a b Cite error: The named reference Veres-2015 was invoked but never defined (see the help page).


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