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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 39 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .04715343564257046 | 3.3655e-08 | |
| a | 3.052064070221236 | 1.5248e-08 | au |
| q | 2.908148763509057 | 1.0619e-07 | au |
| i | 9.922757718221025 | 4.1527e-06 | deg |
| node | 150.7127451069952 | 2.3311e-05 | deg |
| peri | 112.1663507940754 | 5.3126e-05 | deg |
| M | 10.65813344901046 | 4.7154e-05 | deg |
| tp | 2458942.840941159580
(2020-Apr-03.34094116) | 0.00025516 | TDB |
| period | 1947.551255748102
5.33 | 1.4595e-05
3.996e-08 | d
yr |
| n | .1848475098858003 | 1.3852e-09 | deg/d |
| Q | 3.195979376933415 | 1.5967e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
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Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
11.6 |
|
n/a |
MPO337270 |
|
| 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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