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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 47 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .04476423235810504 | 2.0174e-08 | |
a | 2.787381462607718 | 8.3197e-09 | au |
q | 2.662606471144871 | 5.446e-08 | au |
i | 1.012532637142326 | 9.4944e-07 | deg |
node | 59.43167737644647 | 4.9453e-05 | deg |
peri | 234.1240322469396 | 5.7343e-05 | deg |
M | 142.591831497457 | 1.6514e-05 | deg |
tp | 2458527.236323125824 (2019-Feb-12.73632313) | 7.7559e-05 | TDB |
period | 1699.781264672416 4.65 | 7.6102e-06 2.084e-08 | d yr |
n | .2117919566958986 | 9.4823e-10 | deg/d |
Q | 2.912156454070564 | 8.6922e-09 | au |
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| | Orbit Determination Parameters
Additional Information
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Physical Parameter Table
Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
absolute magnitude |
H |
10.91 |
|
n/a |
E2021B10 |
|
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) |
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1128 Astrid (1929 EB) Discovered 1929-Mar-10 by Delporte, E. at Uccle |
Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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Alternate Designations
1929 EB = 1949 QF2 = 1954 UL3 = 1964 VW = 1972 LM1 = A917 SQ = A920 JA |
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