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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 40 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .0477489798427727 | 3.3475e-08 | |
| a | 3.052571099312674 | 1.6032e-08 | au |
| q | 2.906813943422963 | 1.0623e-07 | au |
| i | 9.932901862490247 | 4.1562e-06 | deg |
| node | 150.6704050376607 | 2.3256e-05 | deg |
| peri | 111.379107752379 | 5.2663e-05 | deg |
| M | 48.35314212847208 | 4.6666e-05 | deg |
| tp | 2458938.850861340020
(2020-Mar-30.35086134) | 0.0002527 | TDB |
| period | 1948.036586067652
5.33 | 1.5347e-05
4.202e-08 | d
yr |
| n | .1848014573107704 | 1.4559e-09 | deg/d |
| Q | 3.198328255202385 | 1.6798e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
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Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
11.68 |
|
n/a |
E2021B10 |
|
| diameter |
diameter |
15.962 |
km |
0.255 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
| geometric albedo |
albedo |
0.159 |
|
0.008 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
|
| 2684 Douglas (1981 AH1) Discovered 1981-Jan-03 by Thomas, N. G. at Flagstaff (AM) |
| Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory. |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
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Alternate Designations
| 1981 AH1 = 1960 DE = 1972 NY = 1978 PO2 = 1978 RU4 = 1978 SE4 |
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