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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 24 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .3595485690795021 | 3.8725e-08 | |
| a | 2.367746379878869 | 7.8433e-09 | au |
| q | 1.516426557050251 | 9.0725e-08 | au |
| i | 21.79547132094463 | 6.8241e-06 | deg |
| node | 322.3560943282682 | 1.3687e-05 | deg |
| peri | 108.6270215650084 | 1.7751e-05 | deg |
| M | 174.9406164031878 | 9.8209e-06 | deg |
| tp | 2458353.820117924843
(2018-Aug-23.32011792) | 3.4682e-05 | TDB |
| period | 1330.764475017673
3.64 | 6.6124e-06
1.81e-08 | d
yr |
| n | .270521197971729 | 1.3442e-09 | deg/d |
| Q | 3.219066202707487 | 1.0663e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
12.4 |
|
n/a |
MPO452211 |
|
| diameter |
diameter |
7.023 |
km |
1.045 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N) |
|
| rotation period |
rot_per |
4.2261 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Brinsfield, J. (2008) Minor Planet Bull. 35, 119-122.]
[Pravec, P.; Wolf, M.; Sarounova, L. (2008) http://www.asu.cas.cz/~ppravec/neo.htm]
[Stephens, R.D. (2008) Minor Planet Bull. 35, 126-127.]
[Warner, B.D. (2015) Minor Planet Bull. 42, 54-60.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] |
| geometric albedo |
albedo |
0.307 |
|
0.146 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N) |
|
| 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) |
|
| 3401 Vanphilos (1981 PA) Discovered 1981-Aug-01 by Harvard College at Agassiz Station |
| Discovered at Oak Ridge Observatory (until 1981 Harvard College's Agassiz Station). The principal observers are R. E. McCrosky, C.-Y. Shao, G. Schwartz, and J. H. Bulger, with some assistance from others. |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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