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
2020-01-11 15:44:23 S 06 16 27.358 +80 33 53.24 – V C57
2020-01-11 15:44:23 s 1 +37363.702 0 +376584.18 8020.0 – C57
2020-01-11 16:14:23 S 06 16 16.313 +80 33 50.40 – V C57
2020-01-11 16:14:23 s 1 +36361.044 0 +377320.26 40.0 – C57
2020-01-11 16:44:23 S 06 16 05.242 +80 33 47.95 – V C57
2020-01-11 16:44:23 s 1 +35357.365 0 +378047.34 7680.0 – C57
2020-01-11 17:14:23 S 06 15 54.182 +80 33 44.86 – V C57
2020-01-11 17:14:23 s 1 +34352.695 0 +378765.45 1000.0 – C57
2020-01-11 17:44:23 S 06 15 43.152 +80 33 42.08 – V C57
2020-01-11 17:44:23 s 1 +33347.063 0 +379474.60 40.0 – C57
2020-01-11 18:14:23 S 06 15 32.138 +80 33 39.06 – V C57
2020-01-11 18:14:23 s 1 +32340.498 0 +380174.83 4840.0 – C57
2020-01-11 18:44:23 S 06 15 21.211 +80 33 35.60 – V C57
2020-01-11 18:44:23 s 1 +31333.030 0 +380866.17 5470.0 – C57
2020-01-11 19:14:23 S 06 15 10.020 +80 33 32.26 – V C57
2020-01-11 19:14:23 s 1 +30324.687 0 +381548.63 1970.0 – C57
2020-01-11 19:44:23 S 06 14 59.280 +80 33 29.23 – V C57
2020-01-11 19:44:23 s 1 +29315.498 0 +382222.24 4380.0 – C57
2020-01-11 19:53:48 C 06 14 27.86 +80 25 11.3 – V K74
2020-01-11 19:56:52 C 06 14 26.73 +80 25 11.0 – V K74
2020-01-11 20:00:10 C 06 14 25.56 +80 25 10.4 – V K74
2020-01-11 20:03:15 C 06 14 24.54 +80 25 09.8 – V K74
2020-01-11 20:14:23 S 06 14 48.134 +80 33 26.28 – V C57
2020-01-11 20:14:23 s 1 +28305.490 0 +382887.03 2760.0 – C57
2020-01-11 20:44:23 S 06 14 37.171 +80 33 23.08 – V C57
2020-01-11 20:44:23 s 1 +27294.692 0 +383543.03 7150.0 – C57
2020-01-11 21:14:23 S 06 14 26.230 +80 33 19.66 – V C57
2020-01-11 21:14:23 s 1 +26283.131 0 +384190.24 7590.0 – C57
2020-01-11 21:44:23 S 06 14 15.170 +80 33 16.38 – V C57
2020-01-11 21:44:23 s 1 +25270.835 0 +384828.71 4140.0 – C57
2020-01-11 22:44:23 S 06 13 53.102 +80 33 09.29 – V C57
2020-01-11 22:44:23 s 1 +23244.147 0 +386079.48 5730.0 – C57
2020-01-11 23:14:23 S 06 13 42.386 +80 33 06.12 – V C57
2020-01-11 23:14:23 s 1 +22229.807 0 +386691.83 870.0 – C57
2020-01-11 23:44:23 S 06 13 31.450 +80 33 02.34 – V C57
2020-01-11 23:44:23 s 1 +21214.840 0 +387295.53 2280.0 – C57
2020-01-12 00:14:23 S 06 13 20.261 +80 32 58.92 – V C57
2020-01-12 00:14:23 s 1 +20199.272 0 +387890.58 30.0 – C57
2020-01-12 01:14:23 S 06 12 58.339 +80 32 51.68 – V C57
2020-01-12 01:14:23 s 1 +18166.434 0 +389054.88 4680.0 – C57
2020-01-12 01:44:23 S 06 12 47.563 +80 32 48.19 – V C57
2020-01-12 01:44:23 s 1 +17149.216 0 +389624.16 1680.0 – C57
2020-01-12 02:14:23 S 06 12 36.732 +80 32 44.12 – V C57
2020-01-12 02:14:23 s 1 +16131.499 0 +390184.89 5170.0 – C57
2020-01-12 02:44:23 S 06 12 25.831 +80 32 40.38 – V C57
2020-01-12 02:44:23 s 1 +15113.309 0 +390737.09 5210.0 – C57
2020-01-12 03:14:23 S 06 12 15.130 +80 32 36.56 – V C57
2020-01-12 03:14:23 s 1 +14094.671 0 +391280.79 1840.0 – C57
2020-01-12 03:44:23 S 06 12 04.015 +80 32 32.60 – V C57
2020-01-12 03:44:23 s 1 +13075.610 0 +391816.00 5090.0 – 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)