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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 71 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .0673712361440616 | 3.4709e-08 | |
| a | 2.43189727606737 | 6.1214e-09 | au |
| q | 2.268057350403335 | 8.5518e-08 | au |
| i | 4.960887480773317 | 3.8146e-06 | deg |
| node | 65.65618041368778 | 4.2579e-05 | deg |
| peri | 160.6156446444489 | 5.1525e-05 | deg |
| M | 293.1022358864957 | 3.0064e-05 | deg |
| tp | 2459257.909972592575
(2021-Feb-12.40997259) | 0.0001159 | TDB |
| period | 1385.212067418267
3.79 | 5.2302e-06
1.432e-08 | d
yr |
| n | .2598880044923095 | 9.8126e-10 | deg/d |
| Q | 2.595737201731405 | 6.5338e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
9.9 |
|
n/a |
MPO502154 |
IRAS observations used: 10 |
| diameter |
diameter |
31.337 |
km |
0.304 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| rotation period |
rot_per |
5.1812 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pilcher, F. (2009) Minor Planet Bull. 36, 100-102.]
[Galad, A.; Kornos, L.; Vilagi, J. (2010) Minor Planet Bull. 37, 9-15.]
[Pilcher, F. (2017) Minor Planet Bull. 44, 317-318.]
[Fauerbach, M.; Fauerbach, M. (2019) Minor Planet Bull. 46, 236-237.]
[Franco, L.; Marchini, A.; Baj, G.; Scarfi, G.; et al. (2019) Minor Planet Bull. 46, 85-86.]
[Franco, L.; Pilcher, F.; Marchini, A.; Baj, G.; et al. (2019) Minor Planet Bull. 46, 392-394.] |
| geometric albedo |
albedo |
0.246 |
|
0.018 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| B-V |
BV |
0.829 |
|
0.034 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=1; phase=12.78 deg. |
| U-B |
UB |
0.402 |
|
0.053 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=1; phase=12.78 deg. |
| Tholen spectral type |
spec_T |
SU |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices; used ground-based radiometric albedo |
| SMASSII spectral type |
spec_B |
Xc |
|
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) |
|
| 131 Vala (A873 KA) Discovered 1873-May-24 by Peters, C. H. F. at Clinton |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
[ show close-approach data ]
Alternate Designations
| A873 KA = 1945 KA = 1952 DS3 = 1953 QE |
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