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1223 Neckar (1931 TG)
Classification: Main-belt Asteroid          SPK-ID: 2001223
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.

Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06022328934076153 3.3584e-08  
a 2.869965573119101 9.9757e-09 au
q 2.697126806011125 9.6459e-08 au
i 2.54411336363585 3.7991e-06 deg
node 40.80213954346419 7.9368e-05 deg
peri 15.12253837183671 8.5358e-05 deg
M 78.21363303482664 3.0456e-05 deg
tp 2458814.672289164758
0.00015039 TDB
period 1775.879351350925
n .2027164737999489 1.0569e-09 deg/d
Q 3.042804340227077 1.0576e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3580  
   data-arc span      41354 days (113.22 yr)  
   first obs. used      1907-11-02  
   last obs. used      2021-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4133  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:53:40  

Additional Information
 Earth MOID = 1.70788 au 
 Jupiter MOID = 2.1686 au 
 T_jup = 3.294 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.56   n/a E2021B10  
diameter diameter 22.783 km 0.213 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 7.81 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Slivan, S.M.; Binzel, R.P. (1996) Icarus 124, 452-470.]
[Michalowski, T.; Pych, W.; Berthier, J.; Kryszczynska, A.; et al. (2000) Astron. Astrophys. Suppl. Ser. 146, 471-479.]
[Slivan, S.M.; Binzel, R.P.; Crespo da Silva, L.D.; Kaasalainen, M.; et al. (2003) Icarus 162, 285-307.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.170   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.840   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=16.54, mean=16.54, max.=16.54) deg.
U-B UB 0.405   0.092 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=16.54, mean=16.54, max.=16.54) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo

1223 Neckar (1931 TG)          Discovered 1931-Oct-06 by Reinmuth, K. at Heidelberg
Independent discovery Oct. 11 by F. Rigaux, Uccle, was announced first.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1931 TG = 1930 MN = 1931 TA1 = 1953 FC = A907 VD = A909 BD = A917 XC = A917 YA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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