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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 45 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .04488940620976312 | 3.032e-08 | |
| a | 2.786699482182723 | 8.9808e-09 | au |
| q | 2.661606197142486 | 8.3907e-08 | au |
| i | 1.012599340287321 | 3.1933e-06 | deg |
| node | 59.43182593187223 | 0.00019613 | deg |
| peri | 233.8521918958444 | 0.00019976 | deg |
| M | 100.4989968995378 | 3.7943e-05 | deg |
| tp | 2458526.156604094339
(2019-Feb-11.65660409) | 0.00017909 | TDB |
| period | 1699.157482106403
4.65 | 8.2139e-06
2.249e-08 | d
yr |
| n | .2118697082472409 | 1.0242e-09 | deg/d |
| Q | 2.91179276722296 | 9.3839e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
10.9 |
|
n/a |
MPO313426 |
|
| diameter |
diameter |
41.851 |
km |
0.278 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| rotation period |
rot_per |
10.228 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2005) 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]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] |
| geometric albedo |
albedo |
0.031 |
|
0.004 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| SMASSII spectral type |
spec_B |
C |
|
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) |
|
| 1128 Astrid (1929 EB) Discovered 1929-Mar-10 by Delporte, E. at Uccle |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
[ show close-approach data ]
Alternate Designations
| 1929 EB = 1949 QF2 = 1954 UL3 = 1964 VW = 1972 LM1 = A917 SQ = A920 JA |
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