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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 29 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .07076837311905465 | 3.693e-08 | |
| a | 2.952518852675881 | 1.6757e-08 | au |
| q | 2.743573896868671 | 1.047e-07 | au |
| i | 2.379406931760448 | 5.1561e-06 | deg |
| node | 162.8120261593281 | 0.00010726 | deg |
| peri | 102.776578172221 | 0.00011498 | deg |
| M | 187.6790908137211 | 4.2964e-05 | deg |
| tp | 2460087.498575850464
(2023-May-22.99857585) | 0.00022267 | TDB |
| period | 1853.051314631719
5.07 | 1.5775e-05
4.319e-08 | d
yr |
| n | .1942741666986958 | 1.6539e-09 | deg/d |
| Q | 3.161463808483091 | 1.7943e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
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[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
14.33 |
|
n/a |
E2021B10 |
|
|
| 15849 Billharper | Discovered 1995 Dec. 18 by Spacewatch at Kitt Peak. |
| William Leonard Harper (b. 1943) specializes in the philosophy of science. He earned a Ph.D. at the University of Rochester and has been in the department of philosophy at the University of Western Ontario since 1970. The name was suggested by R. Jedicke and P. Jedicke. |
| NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) |
| Reference: 20050523/MPCPages.arc | Last Updated: 2005-07-21 |
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