[ 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.
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .1378959384656455 | 3.8068e-08 | |
a | 3.15853234448464 | 1.4089e-08 | au |
q | 2.722983562667836 | 1.202e-07 | au |
i | 10.11009358312685 | 4.004e-06 | deg |
node | 230.6158494106641 | 2.2972e-05 | deg |
peri | 115.4047799558039 | 2.6644e-05 | deg |
M | 123.4747841250677 | 1.3789e-05 | deg |
tp | 2458297.262219594710 (2018-Jun-27.76221959) | 7.7945e-05 | TDB |
period | 2050.342527341234 5.61 | 1.3719e-05 3.756e-08 | d yr |
n | .1755804189784949 | 1.1748e-09 | deg/d |
Q | 3.594081126301445 | 1.6032e-08 | au |
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| | Orbit Determination Parameters
Additional Information
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[ hide covariance matrix ]
Orbital Elements at Epoch 2456223.5 (2012-Oct-23.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .1340103552639473 | 3.7304e-08 | |
q | 2.734286280577332 | 1.1671e-07 | au |
tp | 2456229.233050864653 (2012-Oct-28.73305086) | 8.1528e-05 | TDB |
node | 231.2835540385033 | 2.2996e-05 | deg |
peri | 112.2022008984639 | 2.7091e-05 | deg |
i | 10.10331912856911 | 3.999e-06 | deg |
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| | Orbit Determination Parameters
Additional Information
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Orbit Covariance (6×6)
|
|
e |
q |
tp |
node |
peri |
i |
e |
1.39161220299739E-15 |
-4.330859382453153E-15 |
2.826069605579052E-13 |
-5.947458980627726E-16 |
3.492384490447117E-14 |
4.799127650491398E-16 |
q |
-4.330859382453153E-15 |
1.362194784526292E-14 |
-8.578877226926443E-13 |
1.046398111417526E-15 |
-1.067771489583039E-13 |
-5.718954903006487E-16 |
tp |
2.826069605579052E-13 |
-8.578877226926443E-13 |
6.646851660790192E-9 |
-1.289261614696307E-11 |
1.195100785496686E-9 |
1.433847697736748E-12 |
node |
-5.947458980627726E-16 |
1.046398111417526E-15 |
-1.289261614696307E-11 |
5.288169876616056E-10 |
-5.220251487382698E-10 |
-1.09829330579188E-11 |
peri |
3.492384490447117E-14 |
-1.067771489583039E-13 |
1.195100785496686E-9 |
-5.220251487382698E-10 |
7.339273691620525E-10 |
1.091515857614544E-11 |
i |
4.799127650491398E-16 |
-5.718954903006487E-16 |
1.433847697736748E-12 |
-1.09829330579188E-11 |
1.091515857614544E-11 |
1.599188971168026E-11 |
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Physical Parameter Table
Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
absolute magnitude |
H |
9.7 |
|
n/a |
MPO272640 |
|
diameter |
diameter |
35.741 |
km |
0.602 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
rotation period |
rot_per |
42.61 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List: [Ferrero, A. (2013) Minor Planet Bull. 40, 31-32.] [Stephens, R.D. (2013) Minor Planet Bull. 40, 34-35.] [Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.] |
geometric albedo |
albedo |
0.166 |
|
0.047 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
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|
979 Ilsewa (A922 MA) Discovered 1922-Jun-29 by Reinmuth, K. at Heidelberg |
Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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[ hide close-approach data ]
Close-Approach Data ...sorted by Date/Time (TDB)
|
Date/Time (TDB) |
Time Uncertainty (days_HH:MM) |
Body |
Nominal Distance (au) |
Minimum Distance (au) |
Maximum Distance (au) |
V-relative (km/s) |
V-infinity (km/s) |
JD (TDB) |
Time Uncertainty (minutes) |
Semi-major axis (km) |
Semi-minor axis (km) |
range-LOV angle (deg) |
N-sigma |
BP |
Orbit Ref. |
Reference |
Modified |
1919-Sep-08 23:09 |
00:02 |
Jupiter |
1.94896228976774 |
1.94896181667705 |
1.94896276285844 |
2.71727073588898 |
2.55232377563373 |
2422210.464664211 |
1.86719836717228 |
102.974077275162 |
29.2684437251664 |
-80.4777136906178 |
2403939.75788253 |
T |
41 |
CATAB v2.0f-lin.ifort 2020-Dec-18 01:57:39 |
2020-Dec-18 01:57 |
1930-Mar-29 02:31 |
00:02 |
Jupiter |
1.95892706248874 |
1.95892665587743 |
1.95892746910039 |
4.29519860113037 |
4.19332194531395 |
2426064.604882828 |
1.49501184484056 |
108.383496464617 |
16.5139760411653 |
-87.5022092676673 |
3232037.10323108 |
T |
41 |
CATAB v2.0f-lin.ifort 2020-Dec-18 01:57:39 |
2020-Dec-18 01:57 |
2015-Feb-26 05:31 |
< 00:01 |
Jupiter |
1.97952370568619 |
1.97952322300129 |
1.9795241883711 |
2.19324065296974 |
1.98859759676654 |
2457079.730151479 |
0.26182021181717 |
67.4724943476335 |
21.5287042397814 |
87.701265988249 |
3187987.08214623 |
T |
41 |
CATAB v2.0f-lin.ifort 2020-Dec-18 01:57:39 |
2020-Dec-18 01:57 |
2025-Aug-26 01:45 |
< 00:01 |
Jupiter |
1.96539093402846 |
1.96539053736181 |
1.96539133069511 |
3.72835346591732 |
3.61091146628244 |
2460913.572768039 |
0.342147744073371 |
61.6897796479917 |
17.2738231044855 |
88.0306336706863 |
3659270.82803966 |
T |
41 |
CATAB v2.0f-lin.ifort 2020-Dec-18 01:57:39 |
2020-Dec-18 01:57 |
2110-Aug-20 20:47 |
00:02 |
Jupiter |
1.98629742035408 |
1.98629693738333 |
1.98629790332484 |
2.12909850203835 |
1.91838335198298 |
2491953.366136717 |
2.04784763399196 |
93.5786647380734 |
15.0750455985613 |
77.1895880955055 |
2772629.97299864 |
T |
41 |
CATAB v2.0f-lin.ifort 2020-Dec-18 01:57:39 |
2020-Dec-18 01:57 |
2121-Feb-01 15:08 |
00:02 |
Jupiter |
1.98030875716687 |
1.98030832106549 |
1.98030919326825 |
3.04769119390001 |
2.90395879979627 |
2495771.130548687 |
2.184338230047 |
69.5087264508965 |
26.6592520417681 |
89.4592383673617 |
1596318.25277666 |
T |
41 |
CATAB v2.0f-lin.ifort 2020-Dec-18 01:57:39 |
2020-Dec-18 01:57 |
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Alternate Designations
A922 MA = 1932 EG1 = 1951 TW = 1966 HO = A916 KD = A923 XB |
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