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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 33 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .07758492885965329 | 3.8345e-08 | |
| a | 2.840972469195185 | 1.2543e-08 | au |
| q | 2.620555822280443 | 1.1018e-07 | au |
| i | 2.377462426827013 | 4.3334e-06 | deg |
| node | 33.11303262647305 | 7.9435e-05 | deg |
| peri | 353.1092011496684 | 8.2551e-05 | deg |
| M | 261.208210566515 | 2.375e-05 | deg |
| tp | 2459680.473561621108
(2022-Apr-10.97356162) | 0.00011666 | TDB |
| period | 1749.036870112938
4.79 | 1.1583e-05
3.171e-08 | d
yr |
| n | .2058275649596536 | 1.3631e-09 | deg/d |
| Q | 3.061389116109927 | 1.3516e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
13.47 |
|
n/a |
E2021B10 |
|
| diameter |
diameter |
5.023 |
km |
0.375 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
| rotation period |
rot_per |
18.849 |
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:
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.] |
| geometric albedo |
albedo |
0.228 |
|
0.074 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
|
| 7862 Keikonakamura | Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey. |
| Keiko Nakamura Messenger (b. 1973) is a space scientist at NASA's Johnson Space Center. Her work revealed the existence of organic globules in the Tagish Lake meteorite, furthering our understanding of organic material in the solar system. |
| NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) |
| Reference: 20060809/MPCPages.arc | Last Updated: 2007-08-08 |
|
Alternate Designations
| 1981 EE28 = 1954 QC1 = 1995 CP7 |
|
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