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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 29 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .071562176912076 | 2.8924e-08 | |
| a | 2.286250863437618 | 7.4184e-09 | au |
| q | 2.122641774682908 | 6.5331e-08 | au |
| i | 6.131274178378145 | 3.7293e-06 | deg |
| node | 166.9061060439744 | 3.0446e-05 | deg |
| peri | 100.0453843730753 | 4.0739e-05 | deg |
| M | 67.4893703372379 | 2.6895e-05 | deg |
| tp | 2458963.789716192344
(2020-Apr-24.28971619) | 9.4352e-05 | TDB |
| period | 1262.653685238751
3.46 | 6.1456e-06
1.683e-08 | d
yr |
| n | .285113807696153 | 1.3877e-09 | deg/d |
| Q | 2.449859952192327 | 7.9493e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
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[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
15.4 |
|
n/a |
MPO384939 |
|
| diameter |
diameter |
1.784 |
km |
0.231 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
| rotation period |
rot_per |
2.964 |
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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.] |
| geometric albedo |
albedo |
0.265 |
|
0.028 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
|
| 21615 Guardamano | Discovered 1999 May 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. |
| Andrew Lacson Guardamano (b. 1986) was awarded second place in the 2005 Intel International Science and Engineering Fair for his medicine and health team project. He attends the Archbishop MacDonald High School, Edmonton, Alberta, Canada. |
| 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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