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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 90 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .2421194476246994 | 2.9689e-08 | |
| a | 2.994167544689794 | 7.9103e-09 | au |
| q | 2.269221352673699 | 8.9642e-08 | au |
| i | 12.65436282518285 | 3.5497e-06 | deg |
| node | 134.1362241797371 | 1.5932e-05 | deg |
| peri | 277.1805919812485 | 1.7667e-05 | deg |
| M | 46.42846818435117 | 8.1184e-06 | deg |
| tp | 2458956.441223882173
(2020-Apr-16.94122388) | 4.2213e-05 | TDB |
| period | 1892.398410680961
5.18 | 7.4993e-06
2.053e-08 | d
yr |
| n | .1902347824686967 | 7.5388e-10 | deg/d |
| Q | 3.71911373670589 | 9.8256e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
9.70 |
|
n/a |
E2021B10 |
IRAS observations used: 8 |
| diameter |
diameter |
36.698 |
km |
0.408 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| rotation period |
rot_per |
21.806 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Binzel, R.P. (1987) Icarus 72, 135-208.]
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Aznar, A.M.; Carreno Garcerain, A.; Arce Masego, E.; Brines Rodriques, P.; et al. (2016) Minor Planet Bull. 43, 257-263.]
[Devogele, M.; Tanga, P.; Bendjoya, P.; Rivet, J.P.; et al. (2017) ArXiv:1707.07503.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.] |
| geometric albedo |
albedo |
0.191 |
|
0.034 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| B-V |
BV |
0.885 |
|
0.025 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=1; phase=19.21 deg. |
| U-B |
UB |
0.471 |
|
0.051 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=1; phase=19.21 deg. |
| Tholen spectral type |
spec_T |
S |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 2 color indices |
| SMASSII spectral type |
spec_B |
L |
|
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) |
|
| 458 Hercynia (A900 SD) Discovered 1900-Sep-21 by Wolf, M. and Schwassmann, A. at Heidelberg |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
[ show close-approach data ]
Alternate Designations
| A900 SD = 1947 XB = 2016 FW5 = A902 CA = A915 PD |
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