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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 37 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .181423783777352 | 3.4197e-08 | |
| a | 3.983672022786101 | 2.3324e-08 | au |
| q | 3.260939171084269 | 1.3473e-07 | au |
| i | 11.40255607920907 | 4.0865e-06 | deg |
| node | 137.4318094135188 | 2.2542e-05 | deg |
| peri | 333.0230641331241 | 2.5823e-05 | deg |
| M | 81.0621906467817 | 1.2263e-05 | deg |
| tp | 2458346.557406205126
(2018-Aug-16.05740621) | 9.7861e-05 | TDB |
| period | 2904.181738585932
7.95 | 2.5506e-05
6.983e-08 | d
yr |
| n | .1239591845155278 | 1.0887e-09 | deg/d |
| Q | 4.706404874487934 | 2.7556e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
9.9 |
|
n/a |
MPO473781 |
IRAS observations used: 9 |
| diameter |
diameter |
72.976 |
km |
0.443 |
urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G) |
|
| rotation period |
rot_per |
11.420 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Dahlgren, M.; Lahulla, J.F.; Lagerkvist, C.-I.; Lagerros, J.; et al. (1998) Icarus 133, 247-285.]
[Brinsfield, J.W. (2010) Minor Planet Bull. 37, 50-53.]
[Warner, B.D.; Stephens, R.D. (2020) Minor Planet Bull. 47, 196-199.] |
| geometric albedo |
albedo |
0.043 |
|
0.010 |
urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G) |
|
| B-V |
BV |
0.719 |
|
0.008 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=3; phase (min.=4.38, mean=6.75, max.=11.14) deg. |
| U-B |
UB |
0.286 |
|
0.025 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=3; phase (min.=4.38, mean=6.75, max.=11.14) deg. |
| Tholen spectral type |
spec_T |
X |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 4 color indices |
|
| 1345 Potomac (A908 CE) Discovered 1908-Feb-04 by Metcalf, J. H. at Taunton |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
Alternate Designations
| A908 CE = 1932 CF = 1932 EA = 1932 FB = 1971 DE2 |
|
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