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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 100 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .1225886915637363 | 4.0536e-08 | |
a | 2.852932181775635 | 7.2865e-09 | au |
q | 2.503194958491684 | 1.1338e-07 | au |
i | 13.55069999910927 | 3.7357e-06 | deg |
node | 344.9424114052404 | 1.4818e-05 | deg |
peri | 188.6975906631774 | 2.111e-05 | deg |
M | 92.5581235698414 | 1.5667e-05 | deg |
tp | 2458547.969724835556 (2019-Mar-05.46972484) | 7.6552e-05 | TDB |
period | 1760.092931619043 4.82 | 6.7431e-06 1.846e-08 | d yr |
n | .2045346546951073 | 7.8359e-10 | deg/d |
Q | 3.202669405059586 | 8.1798e-09 | au |
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| | Orbit Determination Parameters
Additional Information
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[ show covariance matrix ]
Physical Parameter Table
Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
absolute magnitude |
H |
7.6 |
|
n/a |
MPO473766 |
IRAS observations used: 24 |
diameter |
diameter |
85.837 |
km |
0.576 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
rotation period |
rot_per |
62.35 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List: [Zeigler, K.W.; Florence, W.B.; Blanco, E.J.; McGaughey, J. (1986) Minor Planet Bull. 13, 25-26.] |
geometric albedo |
albedo |
0.242 |
|
0.042 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
B-V |
BV |
0.847 |
|
0.073 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=4; phase (min.=5.60, mean=15.13, max.=22.96) deg. |
U-B |
UB |
0.370 |
|
0.026 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=3; phase (min.=5.60, mean=14.98, max.=22.96) deg. |
Tholen spectral type |
spec_T |
S |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 2 color indices |
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385 Ilmatar (A894 EA) Discovered 1894-Mar-01 by Wolf, M. at Heidelberg |
Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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[ show close-approach data ]
Alternate Designations
A894 EA = 1942 FQ = 1953 TQ = 1987 QG3 = A918 CC |
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