[ hide orbit diagram ]
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.
[ revert to old Java-based viewer ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .04715343536748141 | 3.367e-08 | |
| a | 3.052064070372733 | 1.5255e-08 | au |
| q | 2.908148764493 | 1.0625e-07 | au |
| i | 9.922757713656692 | 4.1538e-06 | deg |
| node | 150.7127450540654 | 2.3328e-05 | deg |
| peri | 112.1663512800883 | 5.3152e-05 | deg |
| M | 10.65813295961219 | 4.7181e-05 | deg |
| tp | 2458942.840943802865
(2020-Apr-03.34094380) | 0.0002553 | TDB |
| period | 1947.551255893109
5.33 | 1.4602e-05
3.998e-08 | d
yr |
| n | .1848475098720373 | 1.3859e-09 | deg/d |
| Q | 3.195979376252466 | 1.5975e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
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 |
|
[ show close-approach data ]
Alternate Designations
| 1981 AH1 = 1960 DE = 1972 NY = 1978 PO2 = 1978 RU4 = 1978 SE4 |
|
|
