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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 102 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .02676966740754002 | 3.7635e-08 | |
| a | 2.992997487067891 | 8.8391e-09 | au |
| q | 2.91287593978748 | 1.1232e-07 | au |
| i | 14.89920732261667 | 4.3572e-06 | deg |
| node | 348.7370956164924 | 1.5471e-05 | deg |
| peri | 50.36193417869084 | 8.6244e-05 | deg |
| M | 226.3618928776492 | 8.5312e-05 | deg |
| tp | 2459702.578655677738
(2022-May-03.07865568) | 0.00044953 | TDB |
| period | 1891.289254887343
5.18 | 8.3782e-06
2.294e-08 | d
yr |
| n | .1903463465832697 | 8.4321e-10 | deg/d |
| Q | 3.073119034348301 | 9.0757e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
8.0 |
|
n/a |
MPO473761 |
IRAS observations used: 12 |
| diameter |
diameter |
208.974 |
km |
1.208 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| rotation period |
rot_per |
9.127 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Di Martino, M.; Dotto, E.; Celino, A.; Barucci, M.A.; Fulchignoni, M. (1995) Astron. Astrophys. Suppl. Ser. 112, 1-7.]
[Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2013) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.] |
| geometric albedo |
albedo |
0.027 |
|
0.004 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| B-V |
BV |
0.687 |
|
0.017 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=7; phase (min.=6.21, mean=12.03, max.=17.45) deg. |
| U-B |
UB |
0.306 |
|
0.033 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=7; phase (min.=6.32, mean=12.86, max.=17.45) deg. |
| Tholen spectral type |
spec_T |
XC |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices |
| SMASSII spectral type |
spec_B |
X |
|
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) |
|
| 117 Lomia (A871 RB) Discovered 1871-Sep-12 by Borrelly, A. at Marseille |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
Alternate Designations
| A871 RB = A900 DA = A900 MC |
|
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