IAA RAS IAA Minor Planet Database

1866 Sisyphus (1972 XA)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5381207270 ± 5.42e-09
Semi-major axis (a)1.8933719410 AU ± 4.50e-10
Inclination (i)41.20633494° ± 7.87e-07
Long. of Asc. Node (Ω)63.44668864° ± 1.04e-06
Arg. of Perihelion (ω)293.09862767° ± 1.07e-06
Mean Anomaly (M)140.66424737° ± 8.67e-07
Mean Motion (n)0.3783191899°/day ± 1.35e-10
Perihelion dist (q)0.87450926 AU ± 1.03e-08
Aphelion dist (Q)2.91223463 AU ± 1.03e-08
Orbital Period2.60527700 yr ± 9.28e-10
Physical Parameters
H (abs. magnitude)12.48
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.220″
Uncertainty0
Orbit TypeApollo
MOID0.102869 AU
Observations Used9210
Radar Obs Used1
Gaia Obs Used79
Oppositions38
Arc Total1955-2026
First Observation Used1955-01-26
Last Observation Used2026-04-06
Observations (11960)
Date Type RA Dec Mag Band Observatory
2020-01-10 19:44:23 S 06 23 57.067 +80 35 03.52 – V C57
2020-01-10 19:44:23 s 1 +76248.623 0 +339416.57 4310.0 – C57
2020-01-10 20:14:23 S 06 23 45.470 +80 35 02.98 – V C57
2020-01-10 20:14:23 s 1 +75315.317 0 +340538.20 90.0 – C57
2020-01-10 20:44:23 S 06 23 34.234 +80 35 02.54 – V C57
2020-01-10 20:44:23 s 1 +74379.486 0 +341649.49 8900.0 – C57
2020-01-10 21:14:23 S 06 23 22.776 +80 35 01.61 – V C57
2020-01-10 21:14:23 s 1 +73441.177 0 +342750.47 830.0 – C57
2020-01-10 21:44:23 S 06 23 11.414 +80 35 01.03 – V C57
2020-01-10 21:44:23 s 1 +72500.438 0 +343841.20 5960.0 – C57
2020-01-10 22:14:23 S 06 23 00.158 +80 34 59.63 – V C57
2020-01-10 22:14:23 s 1 +71557.314 0 +344921.70 4370.0 – C57
2020-01-10 22:44:23 S 06 22 48.643 +80 34 58.48 – V C57
2020-01-10 22:44:23 s 1 +70611.850 0 +345992.02 6140.0 – C57
2020-01-10 23:14:23 S 06 22 37.678 +80 34 57.58 – V C57
2020-01-10 23:14:23 s 1 +69664.091 0 +347052.20 1350.0 – C57
2020-01-10 23:44:23 S 06 22 26.141 +80 34 56.03 – V C57
2020-01-10 23:44:23 s 1 +68714.082 0 +348102.27 80.0 – C57
2020-01-11 00:14:23 S 06 22 14.686 +80 34 55.20 – V C57
2020-01-11 00:14:23 s 1 +67761.865 0 +349142.28 2400.0 – C57
2020-01-11 01:44:23 S 06 21 40.723 +80 34 51.78 – V C57
2020-01-11 01:44:23 s 1 +64892.403 0 +352202.33 1670.0 – C57
2020-01-11 02:44:23 S 06 21 18.382 +80 34 48.76 – V C57
2020-01-11 02:44:23 s 1 +62969.168 0 +354192.73 500.0 – C57
2020-01-11 03:14:23 S 06 21 07.118 +80 34 47.39 – V C57
2020-01-11 03:14:23 s 1 +62004.596 0 +355173.16 5920.0 – C57
2020-01-11 03:44:23 S 06 20 55.625 +80 34 45.26 – V C57
2020-01-11 03:44:23 s 1 +61038.108 0 +356143.78 5440.0 – C57
2020-01-11 04:14:23 S 06 20 44.722 +80 34 43.90 – V C57
2020-01-11 04:14:23 s 1 +60069.743 0 +357104.63 9130.0 – C57
2020-01-11 04:44:23 S 06 20 33.305 +80 34 42.64 – V C57
2020-01-11 04:44:23 s 1 +59099.540 0 +358055.76 7050.0 – C57
2020-01-11 05:14:23 S 06 20 20.177 +80 34 41.12 – V C57
2020-01-11 05:14:23 s 1 +58127.537 0 +358997.18 9270.0 – C57
2020-01-11 06:44:23 S 06 19 48.581 +80 34 35.11 – V C57
2020-01-11 06:44:23 s 1 +55201.113 0 +361763.60 2370.0 – C57
2020-01-11 07:14:23 S 06 19 37.150 +80 34 33.60 – V C57
2020-01-11 07:14:23 s 1 +54222.290 0 +362666.57 2430.0 – C57
2020-01-11 09:14:23 S 06 18 52.382 +80 34 25.39 – V C57
2020-01-11 09:14:23 s 1 +50291.226 0 +366183.47 9470.0 – C57
2020-01-11 09:44:23 S 06 18 40.968 +80 34 23.12 – V C57
2020-01-11 09:44:23 s 1 +49304.694 0 +367039.11 3230.0 – C57
2020-01-11 10:14:23 S 06 18 29.993 +80 34 21.40 – V C57
2020-01-11 10:14:23 s 1 +48316.725 0 +367885.37 1910.0 – C57
2020-01-11 11:14:23 S 06 18 08.417 +80 34 16.68 – V C57
2020-01-11 11:14:23 s 1 +46336.611 0 +369549.90 4250.0 – C57
2020-01-11 14:44:23 S 06 16 49.685 +80 33 58.72 – V C57
2020-01-11 14:44:23 s 1 +39365.835 0 +375084.91 630.0 – C57
2020-01-11 15:14:23 S 06 16 38.657 +80 33 55.87 – V C57
2020-01-11 15:14:23 s 1 +38365.309 0 +375839.08 1570.0 – C57
Radar Observations (2)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1985-12-08 00:00:00 -295248 20 Hz 2380 -1 -1
1985-12-08.000000 -29524800 2000 Hz 2380 251 251
Station codes
-1 Arecibo (305-m, 1963–2020)