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
2020-01-19 19:44:23 S 05 20 49.070 +79 25 33.78 – V C57
2020-01-19 19:44:23 s 1 -179148.74 7 +49576.419 1360.0 – C57
2020-01-19 20:14:23 S 05 20 44.170 +79 25 17.87 – V C57
2020-01-19 20:14:23 s 1 -177844.00 2 +46957.012 1710.0 – C57
2020-01-19 20:44:22 S 05 20 38.916 +79 25 01.13 – V C57
2020-01-19 20:44:22 s 1 -176503.36 4 +44328.145 9690.0 – C57
2020-01-19 21:14:23 S 05 20 34.013 +79 24 44.93 – V C57
2020-01-19 21:14:23 s 1 -175125.95 8 +41690.061 3880.0 – C57
2020-01-19 21:44:23 S 05 20 28.913 +79 24 28.37 – V C57
2020-01-19 21:44:23 s 1 -173710.88 0 +39043.022 2760.0 – C57
2020-01-19 22:14:22 S 05 20 23.942 +79 24 12.06 – V C57
2020-01-19 22:14:22 s 1 -172257.19 3 +36387.318 4790.0 – C57
2020-01-19 22:44:23 S 05 20 19.013 +79 23 55.90 – V C57
2020-01-19 22:44:23 s 1 -170763.92 5 +33723.263 8360.0 – C57
2020-01-19 23:14:23 S 05 20 14.028 +79 23 39.52 – V C57
2020-01-19 23:14:23 s 1 -169230.07 2 +31051.202 1770.0 – C57
2020-01-19 23:44:22 S 05 20 09.091 +79 23 23.10 – V C57
2020-01-19 23:44:22 s 1 -167654.59 0 +28371.509 3280.0 – C57
2020-01-20 00:14:23 S 05 20 04.282 +79 23 06.76 – V C57
2020-01-20 00:14:23 s 1 -166036.40 1 +25684.593 1070.0 – C57
2020-01-20 00:44:23 S 05 19 59.340 +79 22 50.41 – V C57
2020-01-20 00:44:23 s 1 -164374.38 5 +22990.900 3240.0 – C57
2020-01-20 01:14:22 S 05 19 54.480 +79 22 33.82 – V C57
2020-01-20 01:14:22 s 1 -162667.38 3 +20290.916 7830.0 – C57
2020-01-20 01:44:23 S 05 19 49.783 +79 22 17.18 – V C57
2020-01-20 01:44:23 s 1 -160914.19 2 +17585.168 2780.0 – C57
2020-01-20 02:14:23 S 05 19 45.005 +79 22 00.88 – V C57
2020-01-20 02:14:23 s 1 -159113.56 5 +14874.233 5950.0 – C57
2020-01-20 02:44:22 S 05 19 40.277 +79 21 44.17 – V C57
2020-01-20 02:44:22 s 1 -157264.21 3 +12158.738 5100.0 – C57
2020-01-20 03:14:23 S 05 19 35.719 +79 21 28.19 – V C57
2020-01-20 03:14:23 s 1 -155364.79 5 + 9439.365 7930.0 – C57
2020-01-20 03:44:23 S 05 19 30.866 +79 21 10.87 – V C57
2020-01-20 03:44:23 s 1 -153413.92 6 + 6716.856 2000.0 – C57
2020-01-20 04:14:22 S 05 19 26.342 +79 20 55.21 – V C57
2020-01-20 04:14:22 s 1 -151410.16 7 + 3992.020 4800.0 – C57
2020-01-20 04:44:23 S 05 19 21.742 +79 20 38.40 – V C57
2020-01-20 04:44:23 s 1 -149352.03 0 + 1265.736 3690.0 – C57
2020-01-20 05:14:23 S 05 19 17.201 +79 20 22.06 – V C57
2020-01-20 05:14:23 s 1 -147237.97 4 - 1461.036 5940.0 – C57
2020-01-20 05:44:22 S 05 19 12.802 +79 20 05.60 – V C57
2020-01-20 05:44:22 s 1 -145066.40 4 - 4187.256 8700.0 – C57
2020-01-20 06:14:23 S 05 19 08.167 +79 19 48.76 – V C57
2020-01-20 06:14:23 s 1 -142835.66 9 - 6911.787 8990.0 – C57
2020-01-20 06:44:23 S 05 19 03.811 +79 19 32.23 – V C57
2020-01-20 06:44:23 s 1 -140544.06 5 - 9633.394 3720.0 – C57
2020-01-20 07:14:22 S 05 18 59.273 +79 19 15.67 – V C57
2020-01-20 07:14:22 s 1 -138189.82 8 -12350.731 9650.0 – C57
2020-01-20 13:13:26 C 05 18 48.64 +79 17 10.7 – V T05
2020-01-20 13:17:28 C 05 18 47.84 +79 17 08.8 – V T05
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)