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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 42 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .2991119592048748 | 1.8524e-08 | |
| a | 2.382919564225876 | 6.3127e-09 | au |
| q | 1.670159824742648 | 4.5027e-08 | au |
| i | 24.25398846657897 | 4.5367e-07 | deg |
| node | 97.31404263513993 | 1.6962e-06 | deg |
| peri | 291.5388823922624 | 4.3696e-06 | deg |
| M | 67.85370139510073 | 6.4853e-06 | deg |
| tp | 2458947.259277593787
(2020-Apr-07.75927759) | 2.3665e-05 | TDB |
| period | 1343.576815881986
3.68 | 5.339e-06
1.462e-08 | d
yr |
| n | .2679415093685427 | 1.0647e-09 | deg/d |
| Q | 3.095679303709105 | 8.201e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
9.5 |
|
n/a |
MPO502155 |
IRAS observations used: 2 |
| diameter |
diameter |
27.714 |
km |
0.300 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| rotation period |
rot_per |
9.463 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Schober, H.J.; Erikson, A.; Hahn, G.; Lagerkvist, C.-I. (1993) Astron. Astrophys. Suppl. Ser. 101, 499-505.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2014) Minor Planet Bull. 41, 144-155.]
[Warner, B.D. (2018) Minor Planet Bull. 45, 380-386.] |
| geometric albedo |
albedo |
0.295 |
|
0.046 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| B-V |
BV |
0.893 |
|
0.013 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=4; phase (min.=11.39, mean=21.06, max.=33.19) deg. |
| U-B |
UB |
0.480 |
|
0.049 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=3; phase (min.=11.41, mean=24.28, max.=33.19) deg. |
| Tholen spectral type |
spec_T |
S |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices |
|
| 323 Brucia (A891 YB) Discovered 1891-Dec-22 by Wolf, M. at Heidelberg |
| Dec. 20 observation seems to be a prediscovery. |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
Alternate Designations
| A891 YB = 1934 JC = A923 JA |
|
|
