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
2019-07-10 04:44:30 s 1 -40124.660 0 +406631.87 8820.0 – C57
2019-07-10 05:14:30 S 07 02 43.798 -60 30 18.94 – V C57
2019-07-10 05:14:30 s 1 -41131.132 0 +406697.97 7830.0 – C57
2019-07-10 05:44:30 S 07 02 44.105 -60 29 05.42 – V C57
2019-07-10 05:44:30 s 1 -42136.783 0 +406756.50 4040.0 – C57
2019-07-10 06:14:30 S 07 02 44.402 -60 27 54.86 – V C57
2019-07-10 06:14:30 s 1 -43141.593 0 +406807.45 7510.0 – C57
2019-07-10 06:44:30 S 07 02 44.582 -60 26 42.97 – V C57
2019-07-10 06:44:30 s 1 -44145.546 0 +406850.84 8320.0 – C57
2019-07-10 07:14:30 S 07 02 44.782 -60 25 29.89 – V C57
2019-07-10 07:14:30 s 1 -45148.623 0 +406886.67 6530.0 – C57
2019-07-10 07:44:30 S 07 02 45.098 -60 24 19.30 – V C57
2019-07-10 07:44:30 s 1 -46150.806 0 +406914.95 2230.0 – C57
2019-07-10 08:14:30 S 07 02 45.245 -60 23 05.71 – V C57
2019-07-10 08:14:30 s 1 -47152.078 0 +406935.69 5490.0 – C57
2019-07-10 08:44:30 S 07 02 45.372 -60 21 56.52 – V C57
2019-07-10 08:44:30 s 1 -48152.420 0 +406948.89 6370.0 – C57
2019-07-10 09:14:30 S 07 02 45.720 -60 20 43.58 – V C57
2019-07-10 09:14:30 s 1 -49151.814 0 +406954.56 4960.0 – C57
2019-07-10 09:44:30 S 07 02 45.866 -60 19 30.76 – V C57
2019-07-10 09:44:30 s 1 -50150.243 0 +406952.71 1320.0 – C57
2019-07-10 10:14:30 S 07 02 45.962 -60 18 22.57 – V C57
2019-07-10 10:14:30 s 1 -51147.689 0 +406943.34 5530.0 – C57
2019-07-10 10:44:30 S 07 02 46.330 -60 17 08.23 – V C57
2019-07-10 10:44:30 s 1 -52144.133 0 +406926.47 7660.0 – C57
2019-07-10 11:14:30 S 07 02 46.514 -60 15 58.32 – V C57
2019-07-10 11:14:30 s 1 -53139.559 0 +406902.09 7780.0 – C57
2019-07-10 11:44:30 S 07 02 46.661 -60 14 45.49 – V C57
2019-07-10 11:44:30 s 1 -54133.948 0 +406870.21 5960.0 – C57
2019-07-10 12:14:30 S 07 02 46.970 -60 13 34.03 – V C57
2019-07-10 12:14:30 s 1 -55127.283 0 +406830.83 2280.0 – C57
2019-07-10 12:44:30 S 07 02 47.206 -60 12 22.00 – V C57
2019-07-10 12:44:30 s 1 -56119.545 0 +406783.98 6800.0 – C57
2019-07-10 13:14:30 S 07 02 47.359 -60 11 10.93 – V C57
2019-07-10 13:14:30 s 1 -57110.718 0 +406729.64 9610.0 – C57
2019-07-10 13:44:30 S 07 02 47.530 -60 10 00.73 – V C57
2019-07-10 13:44:30 s 1 -58100.782 0 +406667.82 760.0 – C57
2019-07-10 14:14:30 S 07 02 47.890 -60 08 47.08 – V C57
2019-07-10 14:14:30 s 1 -59089.721 0 +406598.54 340.0 – C57
2019-07-10 14:44:30 S 07 02 48.048 -60 07 35.58 – V C57
2019-07-10 14:44:30 s 1 -60077.516 0 +406521.79 8400.0 – C57
2019-07-10 15:14:30 S 07 02 48.168 -60 06 25.42 – V C57
2019-07-10 15:14:30 s 1 -61064.150 0 +406437.57 5030.0 – C57
2019-07-10 15:44:30 S 07 02 48.523 -60 05 13.09 – V C57
2019-07-10 15:44:30 s 1 -62049.605 0 +406345.91 290.0 – C57
2019-07-10 16:14:30 S 07 02 48.706 -60 04 02.86 – V C57
2019-07-10 16:14:30 s 1 -63033.864 0 +406246.79 4260.0 – C57
2019-07-10 16:44:30 S 07 02 48.809 -60 02 49.74 – V C57
2019-07-10 16:44:30 s 1 -64016.908 0 +406140.23 7000.0 – C57
2019-07-10 17:14:30 S 07 02 49.106 -60 01 39.76 – 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)