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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 43 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .1617994918630203 | 3.0604e-08 | |
| a | 2.229200354407036 | 6.2e-09 | au |
| q | 1.868516869803113 | 6.8516e-08 | au |
| i | 2.946492276919435 | 3.2629e-06 | deg |
| node | 216.7393550443398 | 6.8117e-05 | deg |
| peri | 160.1611174902644 | 6.8925e-05 | deg |
| M | 163.761175290479 | 1.1803e-05 | deg |
| tp | 2458647.493128462617
(2019-Jun-12.99312846) | 3.8852e-05 | TDB |
| period | 1215.687866188834
3.33 | 5.0718e-06
1.389e-08 | d
yr |
| n | .2961286445414606 | 1.2354e-09 | deg/d |
| Q | 2.58988383901096 | 7.2032e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
12.97 |
|
n/a |
E2021B10 |
|
| diameter |
diameter |
6.826 |
km |
0.355 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| rotation period |
rot_per |
2.7580 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] |
| geometric albedo |
albedo |
0.264 |
|
0.036 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
|
| 2820 Iisalmi (1942 RU) Discovered 1942-Sep-08 by Vaisala, Y. at Turku |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
Alternate Designations
| 1942 RU = 1929 WM = 1952 SH1 = 1959 VE = 1972 RG3 = 1979 WE4 = 1979 XN = 1979 YS5 |
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