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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 34 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .05468000674919955 | 9.2609e-09 | |
| a | 1.856846065604682 | 3.8361e-09 | au |
| q | 1.755313710205193 | 1.7483e-08 | au |
| i | 23.05706225497548 | 3.4422e-07 | deg |
| node | 344.5631279602663 | 1.4924e-06 | deg |
| peri | 59.705899106799 | 8.13e-06 | deg |
| M | 351.4711605572132 | 7.5588e-06 | deg |
| tp | 2459222.395240383224
(2021-Jan-07.89524038) | 1.9403e-05 | TDB |
| period | 924.1921589492609
2.53 | 2.864e-06
7.841e-09 | d
yr |
| n | .3895293814322053 | 1.2071e-09 | deg/d |
| Q | 1.95837842100417 | 4.0459e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
14.48 |
|
n/a |
E2021B10 |
|
| diameter |
diameter |
3.529 |
km |
0.049 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| rotation period |
rot_per |
159. |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Warner, B.D. (2009) Minor Planet Bull. 36, 109-116.] |
| geometric albedo |
albedo |
0.292 |
|
0.025 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| Tholen spectral type |
spec_T |
SDU:: |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 4 color indices |
|
| 2735 Ellen (1977 RB) Discovered 1977-Sep-13 by Bus, S. J. and Lauer, T. at Palomar |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
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