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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 25 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .09564545006307278 | 4.1761e-08 | |
| a | 2.591954960829554 | 9.4581e-09 | au |
| q | 2.344046262057797 | 1.0844e-07 | au |
| i | 4.320926379303264 | 3.1182e-06 | deg |
| node | 295.4095218096556 | 6.0422e-05 | deg |
| peri | 57.52032448652989 | 6.3135e-05 | deg |
| M | 33.36830883343669 | 1.7639e-05 | deg |
| tp | 2459059.223053855980
(2020-Jul-28.72305386) | 7.4801e-05 | TDB |
| period | 1524.191737307448
4.17 | 8.3427e-06
2.284e-08 | d
yr |
| n | .2361907568374278 | 1.2928e-09 | deg/d |
| Q | 2.839863659601311 | 1.0363e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
14.66 |
|
n/a |
MPCxxxxx |
|
| diameter |
diameter |
3.394 |
km |
0.676 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
| geometric albedo |
albedo |
0.292 |
|
0.116 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
|
| 21330 Alanwhitman | Discovered 1997 Jan. 11 by Spacewatch at Kitt Peak. |
| Alan Douglas Whitman (b. 1946) is a Canadian amateur astronomer and former weather service officer. He is a skillful observer and has written and lectured widely. Name suggested by R. 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: MPC batch dated 2016-06-20 | Last Updated: 2016-06-21 |
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