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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 87 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .08086980484435136 | 3.2751e-08 | |
| a | 2.581815806161525 | 4.7905e-09 | au |
| q | 2.373024865773181 | 8.4253e-08 | au |
| i | 5.785666694323867 | 3.6523e-06 | deg |
| node | 203.6381560785825 | 3.6197e-05 | deg |
| peri | 171.3954440004604 | 4.2973e-05 | deg |
| M | 133.5217004933113 | 2.3433e-05 | deg |
| tp | 2458638.500843466744
(2019-Jun-04.00084347) | 9.8336e-05 | TDB |
| period | 1515.257037653646
4.15 | 4.2173e-06
1.155e-08 | d
yr |
| n | .2375834535356819 | 6.6124e-10 | deg/d |
| Q | 2.790606746549869 | 5.1779e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
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Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
8.35 |
|
n/a |
E2021B10 |
IRAS observations used: 17 |
| diameter |
diameter |
57.30 |
km |
1.1 |
IRAS-A-FPA-3-RDR-IMPS-V6.0 |
IRAS observations used: 17 |
| rotation period |
rot_per |
11.484 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Gil Hutton, R. (1990) Minor Planet Bull. 17, 15-17.]
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1990) Icarus 86, 402-447.]
[Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Shevchenko, V.G.; Bel'skaya, I.N.; Krugly, Yu.N.; Chiorny, V.G.; Gaftonyuk, N.M. (2002) Icarus 155, 365-374.]
[Tungalag, N.; Shevchenko, V.G.; Lupishko, D.F. (2002) Kin. Fiz. Neb. Tel 18, 508-516; Kinematics and Physics of Celestial Bodies 18, ???-???.]
[Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.] |
| geometric albedo |
albedo |
0.2306 |
|
0.010 |
IRAS-A-FPA-3-RDR-IMPS-V6.0 |
IRAS observations used: 17 |
| B-V |
BV |
0.874 |
|
0.021 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=4; phase (min.=4.97, mean=6.52, max.=8.30) deg. |
| U-B |
UB |
0.342 |
|
0.228 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=4; phase (min.=4.97, mean=6.52, max.=8.30) deg. |
| Tholen spectral type |
spec_T |
S |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices; used ground-based radiometric albedo |
| SMASSII spectral type |
spec_B |
Sl |
|
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) |
|
| 119 Althaea (A872 GA) Discovered 1872-Apr-03 by Watson, J. C. at Ann Arbor |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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