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
2024-06-03 09:19:16 C 14 34 21.706 +00 00 20.16 V T05
2024-06-03 09:43:15 C 14 34 19.440 +00 00 04.28 V T05
2024-06-03 16:00:20 C 14 33 44.788 -00 04 08.13 O18
2024-06-03 17:51:42 C 14 33 34.350 -00 05 22.06 O18
2024-06-04 08:21:16 C 14 32 14.911 -00 15 00.32 X F51
2024-06-04 08:41:32 C 14 32 13.011 -00 15 15.58 X F51
2024-06-04 08:59:49 C 14 32 11.316 -00 15 26.21 X F51
2024-06-04 16:00:45 C 14 31 33.058 -00 20 14.21 O18
2024-06-04 18:00:56 C 14 31 21.924 -00 21 35.85 O18
2024-06-04 21:27:14 C 14 31 03.42 -00 23 56.8 X G02
2024-06-04 21:33:40 C 14 31 02.83 -00 24 01.1 X G02
2024-06-04 21:39:49 C 14 31 02.25 -00 24 05.1 X G02
2024-06-05 08:17:59 C 14 30 04.457 -00 31 18.48 V 703
2024-06-05 08:21:13 C 14 30 04.162 -00 31 20.50 V 703
2024-06-05 08:24:27 C 14 30 03.845 -00 31 22.26 V 703
2024-06-05 08:27:42 C 14 30 03.524 -00 31 24.42 V 703
2024-06-05 08:41:21 C 14 30 02.597 -00 31 33.10 V T08
2024-06-05 08:45:25 C 14 30 02.222 -00 31 35.94 V T08
2024-06-05 08:54:21 C 14 30 01.402 -00 31 42.06 V T08
2024-06-05 09:09:37 C 14 29 59.993 -00 31 52.46 V T08
2024-06-05 20:05:10 B 14 29 01.534 -00 39 26.10 V 160
2024-06-05 20:10:01 B 14 29 01.056 -00 39 30.02 V 160
2024-06-06 06:12:35 C 14 28 07.252 -00 46 25.90 V G96
2024-06-06 06:20:08 C 14 28 06.564 -00 46 31.22 V G96
2024-06-06 06:27:38 C 14 28 05.887 -00 46 36.30 V G96
2024-06-06 15:49:44 C 14 27 16.359 -00 53 09.02 O18
2024-06-06 17:48:30 C 14 27 05.696 -00 54 32.15 O18
2024-06-07 07:52:40 C 14 25 51.748 -01 04 25.32 V 703
2024-06-07 07:56:00 C 14 25 51.470 -01 04 27.41 V 703
2024-06-07 07:59:19 C 14 25 51.161 -01 04 30.07 V 703
2024-06-07 08:02:39 C 14 25 50.869 -01 04 32.30 V 703
2024-06-07 08:32:22 C 14 25 48.535 -01 04 51.85 V T05
2024-06-07 08:36:55 C 14 25 48.127 -01 04 55.06 V T05
2024-06-07 08:44:44 C 14 25 47.429 -01 05 00.67 V T05
2024-06-07 08:59:29 C 14 25 46.109 -01 05 11.04 V T05
2024-06-07 15:37:39 C 14 25 11.650 -01 09 55.56 O18
2024-06-07 17:37:30 C 14 25 01.071 -01 11 20.76 O18
2024-06-07 17:43:37 C 14 25 00.521 -01 11 24.97 O18
2024-06-07 19:51:14 C 14 24 49.82 -01 12 56.7 X G02
2024-06-07 19:57:23 C 14 24 49.28 -01 13 01.1 X G02
2024-06-07 20:03:15 C 14 24 48.71 -01 13 05.4 X G02
2024-06-07 20:45:34 B 14 24 45.060 -01 13 34.93 V L92
2024-06-07 20:53:39 B 14 24 44.345 -01 13 40.79 V L92
2024-06-07 21:03:45 B 14 24 43.439 -01 13 47.27 V L92
2024-06-07 21:13:51 B 14 24 42.553 -01 13 54.87 V L92
2024-06-07 21:20:55 B 14 24 41.971 -01 14 00.49 V 160
2024-06-07 21:26:41 B 14 24 41.467 -01 14 04.13 V 160
2024-06-07 21:59:15 C 14 24 38.686 -01 14 28.43 Z C23
2024-06-07 22:02:08 C 14 24 38.364 -01 14 30.34 Z C23
2024-06-07 22:06:10 C 14 24 38.018 -01 14 33.29 Z C23
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)