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
2023-02-21 23:06:14 C 13 16 53.14 +60 36 58.0 – V 088
2023-02-21 23:08:47 C 13 16 52.98 +60 36 59.6 – V 088
2023-02-21 23:11:20 C 13 16 52.81 +60 37 00.9 – V 088
2023-02-21 23:13:54 C 13 16 52.63 +60 37 02.3 – V 088
2023-02-21 23:16:27 C 13 16 52.48 +60 37 03.4 – V 088
2023-02-21 23:19:00 C 13 16 52.29 +60 37 05.0 – V 088
2023-02-21 23:21:33 C 13 16 52.15 +60 37 06.0 – V 088
2023-02-21 23:33:53 C 13 16 51.35 +60 37 12.6 – V 088
2023-02-21 23:36:26 C 13 16 51.17 +60 37 13.8 – V 088
2023-02-21 23:38:59 C 13 16 51.01 +60 37 15.2 – V 088
2023-02-21 23:41:32 C 13 16 50.84 +60 37 16.4 – V 088
2023-02-21 23:44:05 C 13 16 50.66 +60 37 17.8 – V 088
2023-02-21 23:46:38 C 13 16 50.49 +60 37 19.0 – V 088
2023-02-21 23:49:11 C 13 16 50.32 +60 37 20.8 – V 088
2023-02-21 23:51:44 C 13 16 50.16 +60 37 21.8 – V 088
2023-02-21 23:54:16 C 13 16 50.00 +60 37 23.5 – V 088
2023-02-21 23:56:49 C 13 16 49.81 +60 37 24.7 – V 088
2023-02-21 23:59:23 C 13 16 49.66 +60 37 25.7 – V 088
2023-02-22 00:01:56 C 13 16 49.46 +60 37 27.5 – V 088
2023-02-22 00:04:29 C 13 16 49.31 +60 37 28.3 – V 088
2023-02-22 00:07:02 C 13 16 49.14 +60 37 30.1 – V 088
2023-02-22 00:09:35 C 13 16 48.99 +60 37 31.4 – V 088
2023-02-22 00:12:08 C 13 16 48.80 +60 37 32.9 – V 088
2023-02-22 00:14:41 C 13 16 48.63 +60 37 34.1 – V 088
2023-02-22 00:17:14 C 13 16 48.45 +60 37 35.4 – V 088
2023-02-22 00:19:47 C 13 16 48.29 +60 37 36.7 – V 088
2023-02-22 00:22:20 C 13 16 48.14 +60 37 38.1 – V 088
2023-02-22 00:24:52 C 13 16 47.96 +60 37 39.6 – V 088
2023-02-22 00:27:25 C 13 16 47.77 +60 37 40.8 – V 088
2023-02-22 00:29:59 C 13 16 47.63 +60 37 42.0 – V 088
2023-02-22 00:32:32 C 13 16 47.45 +60 37 43.3 – V 088
2023-02-22 00:35:05 C 13 16 47.30 +60 37 44.5 – V 088
2023-02-22 00:37:38 C 13 16 47.12 +60 37 46.1 – V 088
2023-02-22 00:40:11 C 13 16 46.97 +60 37 47.1 – V 088
2023-02-22 00:42:44 C 13 16 46.77 +60 37 48.7 – V 088
2023-02-22 00:45:17 C 13 16 46.60 +60 37 50.0 – V 088
2023-02-22 00:47:50 C 13 16 46.47 +60 37 51.0 – V 088
2023-02-22 00:50:23 C 13 16 46.28 +60 37 52.7 – V 088
2023-02-22 00:52:56 C 13 16 46.06 +60 37 54.4 – V 088
2023-02-22 00:55:28 C 13 16 45.93 +60 37 55.2 – V 088
2023-02-22 00:58:01 C 13 16 45.76 +60 37 56.5 – V 088
2023-02-22 01:00:34 C 13 16 45.58 +60 37 58.3 – V 088
2023-02-22 01:03:07 C 13 16 45.40 +60 37 59.7 – V 088
2023-02-22 01:05:40 C 13 16 45.29 +60 38 00.0 – V 088
2023-02-22 01:08:13 C 13 16 45.07 +60 38 02.3 – V 088
2023-02-22 01:10:46 C 13 16 44.88 +60 38 03.8 – V 088
2023-02-22 01:13:19 C 13 16 44.78 +60 38 03.7 – V 088
2023-02-22 01:15:52 C 13 16 44.60 +60 38 06.0 – V 088
2023-02-22 01:18:25 C 13 16 44.43 +60 38 07.3 – V 088
2023-02-22 01:20:58 C 13 16 44.25 +60 38 08.7 – V 088
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)