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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 118 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .190787860147408 | 2.3701e-08 | |
| a | 2.57362078861701 | 3.864e-09 | au |
| q | 2.082605185525886 | 6.0793e-08 | au |
| i | 5.367533714157987 | 2.735e-06 | deg |
| node | 141.5717018657894 | 2.8867e-05 | deg |
| peri | 358.6250085105434 | 2.9756e-05 | deg |
| M | 65.61238239994485 | 8.2322e-06 | deg |
| tp | 2458925.648211450398
(2020-Mar-17.14821145) | 3.4314e-05 | TDB |
| period | 1508.048332626008
4.13 | 3.3962e-06
9.298e-09 | d
yr |
| n | .2387191393084343 | 5.3761e-10 | deg/d |
| Q | 3.064636391708134 | 4.6012e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
6.99 |
|
n/a |
E2021B10 |
IRAS observations used: 9 |
| diameter |
diameter |
106.699 |
km |
3.140 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| rotation period |
rot_per |
16.806 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Chang, Y.C.; Chang, C.-s. (1962) Acta Astron. Sin. 10, 101-111.]
[Taylor, R.C. (1978) Astron. J. 83, 201-204.]
[Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1989) Astron. Astrophys. Suppl. Ser. 78, 519-532.]
[Erikson, A.; Magnusson, P. (1993) Icarus 103, 62-66.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Riccioli, D.; Blanco, C.; Cigna, M. (2001) Planet. Space Sci. 49, 657-671.]
[Shevchenko, V.G.; Bel'skaya, I.N.; Krugly, Yu.N.; Chiorny, V.G.; Gaftonyuk, N.M. (2002) Icarus 155, 365-374.]
[Lopez-Gonzalez, M.J.; Rodriguez, E. (2005) Planet. Space Sci. 53, 1147-1165.]
[Higley, S.; Hardersen, P.; Dyvig, R. (2008) Minor Planet Bull. 35, 63-66.]
[Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.] |
| geometric albedo |
albedo |
0.274 |
|
0.033 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| B-V |
BV |
0.826 |
|
0.013 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=10; phase (min.=10.69, mean=16.26, max.=24.05) deg. |
| U-B |
UB |
0.411 |
|
0.034 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=10; phase (min.=10.69, mean=16.26, max.=24.05) deg. |
| Tholen spectral type |
spec_T |
S |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices; used ground-based radiometric albedo |
| SMASSII spectral type |
spec_B |
S |
|
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) |
|
| 5 Astraea (A845 XA) Discovered 1845-Dec-08 by Hencke, K. L. at Driesen |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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