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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 56 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .2108473504144295 | 3.3777e-08 | |
| a | 2.853711594777186 | 7.5684e-09 | au |
| q | 2.25201406617148 | 9.4791e-08 | au |
| i | 7.80314034908354 | 4.0622e-06 | deg |
| node | .9479425233011883 | 2.1798e-05 | deg |
| peri | 51.63427786128141 | 2.3541e-05 | deg |
| M | 69.00207252920957 | 8.9324e-06 | deg |
| tp | 2458663.000463210827
(2019-Jun-28.50046321) | 4.2992e-05 | TDB |
| period | 1760.814259494445
4.82 | 7.0049e-06
1.918e-08 | d
yr |
| n | .2044508658757461 | 8.1335e-10 | deg/d |
| Q | 3.455409123382891 | 9.1642e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
8.6 |
|
n/a |
MPO502153 |
IRAS observations used: 32 |
| diameter |
diameter |
117.727 |
km |
0.734 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| rotation period |
rot_per |
10.943 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Zeigler, K.W. (1990) Minor Planet Bull. 17, 1-3.]
[Fauerbach, M.; Bennett, T.; Marks, S.A. (2007) Minor Planet Bull. 34, 57-58.]
[Pilcher, F. (2010) Minor Planet Bull. 37, 45-46.]
[Pilcher, F. (2011) Minor Planet Bull. 38, 156-158.]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Franco, L.; Marchini, A.; Saya, L.-F.; Galli, G.; et al. (2020) Minor Planet Bull. 47, 242-246.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] |
| geometric albedo |
albedo |
0.045 |
|
0.009 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| B-V |
BV |
0.701 |
|
0.011 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=4; phase (min.=2.09, mean=9.43, max.=12.17) deg. |
| U-B |
UB |
0.346 |
|
0.038 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=4; phase (min.=2.09, mean=9.43, max.=12.17) deg. |
| Tholen spectral type |
spec_T |
C |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices |
| SMASSII spectral type |
spec_B |
Cb |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) |
|
| 81 Terpsichore (A864 SA) Discovered 1864-Sep-30 by Tempel, E. W. at Marseille |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
Alternate Designations
| A864 SA = 1936 QR = 1936 RK = 1974 LF = A909 AA |
|
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