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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .1893807728839612 | 4.0491e-08 | |
| a | 2.253131015260998 | 6.8946e-09 | au |
| q | 1.826431322182047 | 9.2211e-08 | au |
| i | 7.809302975506376 | 4.1909e-06 | deg |
| node | 62.83470617705085 | 3.7543e-05 | deg |
| peri | 343.9253823292293 | 3.9595e-05 | deg |
| M | 255.7524483723649 | 1.3497e-05 | deg |
| tp | 2459754.218547578487
(2022-Jun-23.71854758) | 4.7145e-05 | TDB |
| period | 1235.316082897022
3.38 | 5.6701e-06
1.552e-08 | d
yr |
| n | .2914233895148034 | 1.3376e-09 | deg/d |
| Q | 2.679830708339951 | 8.2003e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
15.48 |
|
n/a |
E2021B10 |
|
| diameter |
diameter |
2.203 |
km |
0.339 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
| rotation period |
rot_per |
401.68 |
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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] |
| geometric albedo |
albedo |
0.230 |
|
0.082 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
|
| 28210 Howardfeng | Discovered 1998 Dec. 14 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. |
| Howard Feng (b. 1995) was awarded second place in the 2011 Intel International Science and Engineering Fair for his cellular and molecular biology project. He attends the Bayview Secondary School, Richmond Hill, Ontario, Canada. |
| NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) |
| Reference: 20121029/MPCPages.arc | Last Updated: 2013-03-29 |
|
Alternate Designations
| 1998 XF63 = 1981 UV25 = 1993 FT18 |
|
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