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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.
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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .19099307129552 | 3.9211e-08 | |
| a | 2.554488238196162 | 1.3598e-08 | au |
| q | 2.066598683994795 | 9.9311e-08 | au |
| i | 8.082830809137823 | 5.1576e-06 | deg |
| node | 166.0696237631797 | 3.421e-05 | deg |
| peri | 237.3051725861323 | 3.8017e-05 | deg |
| M | 344.3766397677496 | 2.1086e-05 | deg |
| tp | 2459065.218170777610
(2020-Aug-03.71817078) | 8.7599e-05 | TDB |
| period | 1491.263155530758
4.08 | 1.1908e-05
3.26e-08 | d
yr |
| n | .2414060849453976 | 1.9276e-09 | deg/d |
| Q | 3.042377792397529 | 1.6195e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
14.6 |
|
n/a |
MPO449112 |
|
| diameter |
diameter |
3.792 |
km |
0.827 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
| geometric albedo |
albedo |
0.162 |
|
0.075 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
|
| 21672 Laichunju | Discovered 1999 Sept. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. |
| Lai Chun-Ju (b. 1986) was awarded second place in the 2005 Intel International Science and Engineering Fair for his mathematics project. He attends the Taipei Municipal Chien-Kuo Senior High School, Taipei City, Chinese Taipei. |
| NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) |
| Reference: 20050822/MPCPages.arc | Last Updated: 2005-08-26 |
|
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Alternate Designations
| 1999 RK14 = 1991 TY5 = 1995 SW2 = 1997 ET18 |
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