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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .1407292702288978 | 3.632e-08 | |
| a | 2.284539592572313 | 8.173e-09 | au |
| q | 1.963038002900588 | 8.1979e-08 | au |
| i | 5.366108539532694 | 4.2208e-06 | deg |
| node | 295.6688339472148 | 4.3813e-05 | deg |
| peri | 127.275801259986 | 4.7949e-05 | deg |
| M | 104.8335041571119 | 1.8572e-05 | deg |
| tp | 2458633.222720857873
(2019-May-29.72272086) | 6.4452e-05 | TDB |
| period | 1261.236296108261
3.45 | 6.7682e-06
1.853e-08 | d
yr |
| n | .2854342212564255 | 1.5317e-09 | deg/d |
| Q | 2.606041182244038 | 9.3232e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
16.2 |
|
n/a |
MPO359465 |
|
| diameter |
diameter |
2.348 |
km |
0.484 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
| geometric albedo |
albedo |
0.140 |
|
0.048 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
|
| 101591 (1999 BB21) Discovered 1999-Jan-16 by LINEAR at Socorro |
| Reference: 20051019/Numbers.arc | Last Updated: 2005-10-26 |
|
Alternate Designations
| 1999 BB21 = 1984 WS3 = 2001 QY324 |
|
|
