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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 48 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .1631194724486315 | 3.3487e-08 | |
| a | 2.285750958819587 | 5.8712e-09 | au |
| q | 1.912900468267982 | 7.6887e-08 | au |
| i | 8.189648774694527 | 3.7273e-06 | deg |
| node | 254.1760848224174 | 2.3216e-05 | deg |
| peri | 1.995293789715413 | 2.5515e-05 | deg |
| M | 268.7281361427426 | 1.2117e-05 | deg |
| tp | 2459520.519329794352
(2021-Nov-02.01932979) | 4.3003e-05 | TDB |
| period | 1262.239575891011
3.46 | 4.8633e-06
1.331e-08 | d
yr |
| n | .2852073464309476 | 1.0989e-09 | deg/d |
| Q | 2.658601449371192 | 6.829e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
11.73 |
|
n/a |
E2021B10 |
|
| diameter |
diameter |
11.974 |
km |
0.071 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| rotation period |
rot_per |
21.038 |
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:
[Polakis, T. (2018) Minor Planet Bull. 45, 347-352.] |
| geometric albedo |
albedo |
0.242 |
|
0.045 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
|
| 896 Sphinx (A918 PE) Discovered 1918-Aug-01 by Wolf, M. at Heidelberg |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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