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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.
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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .1134157994322108 | 4.1792e-08 | |
| a | 2.803872230929967 | 1.176e-08 | au |
| q | 2.485868820353268 | 1.1894e-07 | au |
| i | 4.796266937126056 | 4.4739e-06 | deg |
| node | 24.63836753481592 | 4.4676e-05 | deg |
| peri | 301.2152048833041 | 4.7521e-05 | deg |
| M | 228.4984533947703 | 1.7775e-05 | deg |
| tp | 2459626.917837524610
(2022-Feb-16.41783752) | 8.5847e-05 | TDB |
| period | 1714.887979118957
4.70 | 1.0789e-05
2.954e-08 | d
yr |
| n | .2099262484684008 | 1.3207e-09 | deg/d |
| Q | 3.121875641506665 | 1.3094e-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 |
MPO492778 |
|
| diameter |
diameter |
12.564 |
km |
0.192 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| rotation period |
rot_per |
62.6 |
h |
n/a |
LCDB (Rev. 2019-August); Warner et al., 2009 |
Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Rowe, B. (2018) Minor Planet Bull. 45, 203-207.] |
| geometric albedo |
albedo |
0.213 |
|
0.027 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| SMASSII spectral type |
spec_B |
S |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) |
|
| 2353 Alva (1975 UD) Discovered 1975-Oct-27 by Wild, P. at Zimmerwald |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
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Alternate Designations
| 1975 UD = 1926 GA = 1966 VG = 1970 SG1 |
|
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