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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 86 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .2450960556911299 | 3.3269e-08 | |
| a | 2.385812968996708 | 5.2107e-09 | au |
| q | 1.801059620678871 | 7.9734e-08 | au |
| i | 15.37570794777788 | 3.8771e-06 | deg |
| node | 144.5018522893037 | 1.3762e-05 | deg |
| peri | 192.228636916708 | 1.5656e-05 | deg |
| M | 85.16684575066137 | 9.366e-06 | deg |
| tp | 2458882.064790660004
(2020-Feb-02.56479066) | 3.4423e-05 | TDB |
| period | 1346.024669012805
3.69 | 4.4096e-06
1.207e-08 | d
yr |
| n | .2674542363803997 | 8.7619e-10 | deg/d |
| Q | 2.970566317314546 | 6.4878e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
9.1 |
|
n/a |
MPO492751 |
IRAS observations used: 11 |
| diameter |
diameter |
45.476 |
km |
0.245 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| rotation period |
rot_per |
26.4744 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Schober, H.J. (1981) Astron. Astrophys. 96, 302-305.]
[Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hamanowa, H.; Hamanowa, H. (2011) http://www2.ocn.ne.jp/~hamaten/astlcdata.htm]
[Pilcher, F. (2014) Minor Planet Bull. 41, 155-156.]
[Tanga, P.; Carry, B.; Colars, F.; Delbo, M.; et al. (2015) arXiv:1502.00460v1.]
[Franco, L.; Marchini, A.; Baj, G.; Papini, R.; et al. (2019) Minor Planet Bull. 46, 441-443.] |
| geometric albedo |
albedo |
0.205 |
|
0.028 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| B-V |
BV |
0.897 |
|
0.037 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=4; phase (min.=.76, mean=10.85, max.=15.90) deg. |
| U-B |
UB |
0.488 |
|
0.028 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=4; phase (min.=.76, mean=10.85, max.=15.90) deg. |
| Tholen spectral type |
spec_T |
S |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices |
| SMASSII spectral type |
spec_B |
Ld |
|
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) |
|
| 234 Barbara (A883 PA) Discovered 1883-Aug-12 by Peters, C. H. F. at Clinton |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
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Alternate Designations
| A883 PA = 1942 RL1 = 1953 RE = 1975 XP |
|
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