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
2020-01-12 04:14:23 S 06 11 53.434 +80 32 28.50 – V C57
2020-01-12 04:14:23 s 1 +12056.149 0 +392342.74 5020.0 – C57
2020-01-12 04:44:23 S 06 11 42.353 +80 32 24.25 – V C57
2020-01-12 04:44:23 s 1 +11036.314 0 +392861.04 1660.0 – C57
2020-01-12 05:14:23 S 06 11 31.550 +80 32 20.26 – V C57
2020-01-12 05:14:23 s 1 +10016.129 0 +393370.91 5050.0 – C57
2020-01-12 05:44:23 S 06 11 20.863 +80 32 16.01 – V C57
2020-01-12 06:14:23 S 06 11 10.032 +80 32 12.01 – V C57
2020-01-12 06:44:23 S 06 10 59.174 +80 32 07.91 – V C57
2020-01-12 07:14:23 S 06 10 48.374 +80 32 03.19 – V C57
2020-01-12 07:44:23 S 06 10 37.702 +80 31 59.20 – V C57
2020-01-12 08:14:23 S 06 10 26.731 +80 31 54.84 – V C57
2020-01-12 08:44:23 S 06 10 16.162 +80 31 50.27 – V C57
2020-01-12 09:14:23 S 06 10 05.434 +80 31 45.88 – V C57
2020-01-12 09:44:23 S 06 09 54.566 +80 31 41.20 – V C57
2020-01-12 10:14:23 S 06 09 44.050 +80 31 36.48 – V C57
2020-01-12 10:44:23 S 06 09 32.923 +80 31 32.12 – V C57
2020-01-12 11:14:23 S 06 09 22.385 +80 31 27.55 – V C57
2020-01-12 11:44:23 S 06 09 11.738 +80 31 22.80 – V C57
2020-01-12 12:14:23 S 06 09 00.886 +80 31 18.16 – V C57
2020-01-12 12:44:23 S 06 08 50.354 +80 31 13.37 – V C57
2020-01-12 13:14:23 S 06 08 39.456 +80 31 08.36 – V C57
2020-01-12 13:44:23 S 06 08 29.086 +80 31 03.79 – V C57
2020-01-12 14:14:23 S 06 08 18.288 +80 30 58.79 – V C57
2020-01-12 14:44:23 S 06 08 07.584 +80 30 53.64 – V C57
2020-01-12 15:14:23 S 06 07 57.151 +80 30 48.92 – V C57
2020-01-12 15:14:23 s 1 -10425.143 0 +401827.53 1470.0 – C57
2020-01-12 15:44:23 S 06 07 46.195 +80 30 43.56 – V C57
2020-01-12 15:44:23 s 1 -11447.355 0 +402164.65 5640.0 – C57
2020-01-12 16:14:23 S 06 07 35.851 +80 30 38.38 – V C57
2020-01-12 16:14:23 s 1 -12469.421 0 +402493.74 7400.0 – C57
2020-01-12 16:44:23 S 06 07 25.140 +80 30 33.34 – V C57
2020-01-12 16:44:23 s 1 -13491.322 0 +402814.79 6780.0 – C57
2020-01-12 17:14:23 S 06 07 14.530 +80 30 28.37 – V C57
2020-01-12 17:14:23 s 1 -14513.035 0 +403127.83 3830.0 – C57
2020-01-12 17:44:23 S 06 07 03.926 +80 30 23.11 – V C57
2020-01-12 17:44:23 s 1 -15534.541 0 +403432.87 8560.0 – C57
2020-01-12 18:14:23 S 06 06 53.518 +80 30 17.42 – V C57
2020-01-12 18:14:23 s 1 -16555.818 0 +403729.92 1030.0 – C57
2020-01-12 18:44:23 S 06 06 42.898 +80 30 13.61 – V C57
2020-01-12 18:44:23 s 1 -17576.846 0 +404019.00 1260.0 – C57
2020-01-12 19:14:23 S 06 06 32.321 +80 30 06.73 – V C57
2020-01-12 19:14:23 s 1 -18597.605 0 +404300.13 9280.0 – C57
2020-01-12 19:44:23 S 06 06 21.835 +80 30 01.73 – V C57
2020-01-12 19:44:23 s 1 -19618.074 0 +404573.31 5140.0 – C57
2020-01-12 20:14:23 S 06 06 11.165 +80 29 56.33 – V C57
2020-01-12 20:14:23 s 1 -20638.232 0 +404838.56 8860.0 – C57
2020-01-12 20:44:23 S 06 06 00.746 +80 29 50.64 – V C57
2020-01-12 20:44:23 s 1 -21658.060 0 +405095.90 490.0 – C57
2020-01-12 21:14:23 S 06 05 50.383 +80 29 45.17 – V 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)