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
2002-04-02 20:24:56 C 10 13 26.25 +67 19 57.6 151
2002-04-02 20:27:14 C 10 13 26.21 +67 19 56.3 151
2002-04-02 20:29:35 C 10 13 26.02 +67 19 55.1 151
2002-04-02 20:32:40 C 10 13 25.85 +67 19 53.1 151
2002-04-03 04:36:08 C 10 13 03.04 +67 15 14.2 17.2 c 704
2002-04-03 04:55:33 C 10 13 02.09 +67 15 03.2 17.5 c 704
2002-04-03 05:03:40 C 10 13 01.63 +67 14 57.6 17.4 c 704
2002-04-03 05:16:19 C 10 13 01.07 +67 14 50.9 17.4 c 704
2002-04-03 05:30:35 C 10 13 00.27 +67 14 42.1 17.4 c 704
2002-04-03 05:39:27 C 10 13 00.01 +67 14 37.0 17.2 c 704
2002-04-03 05:58:00 C 10 12 58.94 +67 14 26.2 17.4 c 704
2002-04-03 06:00:50 C 10 12 58.86 +67 14 24.6 17.4 c 704
2002-04-03 06:24:59 C 10 12 57.64 +67 14 09.9 17.5 c 704
2002-04-03 06:51:12 C 10 12 56.38 +67 13 54.1 17.4 c 704
2002-04-05 04:17:40 C 10 10 58.60 +66 47 05.0 c 704
2002-04-05 04:34:39 C 10 10 57.91 +66 46 54.7 c 704
2002-04-05 04:51:38 C 10 10 57.19 +66 46 44.6 c 704
2002-04-05 05:09:08 C 10 10 56.45 +66 46 34.0 c 704
2002-04-24 04:44:57 C 10 04 08.79 +61 50 06.7 17.2 c 704
2002-04-24 05:06:11 C 10 04 08.85 +61 49 51.8 17.1 c 704
2002-04-24 05:25:58 C 10 04 09.00 +61 49 38.3 17.5 c 704
2002-04-24 05:44:57 C 10 04 08.97 +61 49 25.6 17.0 c 704
2002-04-24 06:04:00 C 10 04 09.10 +61 49 12.4 17.7 c 704
2002-05-01 03:33:31 C 10 06 04.96 +59 55 20.3 17.9 c 704
2002-05-01 03:51:48 C 10 06 05.20 +59 55 07.4 18.2 c 704
2002-05-01 04:09:58 C 10 06 05.44 +59 54 54.9 18.1 c 704
2002-05-01 04:28:11 C 10 06 05.73 +59 54 42.4 18.2 c 704
2002-05-01 04:46:12 C 10 06 06.01 +59 54 29.7 18.3 c 704
2002-05-04 03:20:37 C 10 07 25.74 +59 05 36.8 18.1 c 704
2002-05-04 03:20:45 C 10 07 25.81 +59 05 36.7 17.2 c 704
2002-05-04 03:38:15 C 10 07 26.08 +59 05 24.3 18.5 c 704
2002-05-04 03:38:21 C 10 07 26.18 +59 05 24.3 17.7 c 704
2002-05-04 03:55:55 C 10 07 26.40 +59 05 12.0 18.2 c 704
2002-05-04 03:56:05 C 10 07 26.51 +59 05 12.1 17.8 c 704
2002-05-04 04:13:35 C 10 07 26.76 +59 04 59.6 17.9 c 704
2002-05-04 04:13:44 C 10 07 26.86 +59 04 59.9 17.7 c 704
2002-05-04 04:31:16 C 10 07 27.10 +59 04 47.3 18.2 c 704
2002-05-04 04:31:22 C 10 07 27.16 +59 04 47.6 17.7 c 704
2002-05-22 03:50:12 C 10 20 23.35 +54 05 56.7 17.6 c 704
2002-05-22 04:11:12 C 10 20 24.15 +54 05 42.7 17.9 c 704
2002-05-22 04:32:57 C 10 20 24.97 +54 05 27.2 17.5 c 704
2002-05-22 04:55:03 C 10 20 25.73 +54 05 11.7 17.5 c 704
2002-05-22 05:15:37 C 10 20 26.52 +54 04 57.0 17.7 c 704
2002-05-30 03:41:54 C 10 28 01.84 +51 54 43.0 17.7 c 704
2002-05-30 04:01:31 C 10 28 02.61 +51 54 29.5 17.6 c 704
2002-05-30 04:21:29 C 10 28 03.40 +51 54 16.1 17.8 c 704
2002-05-30 04:40:57 C 10 28 04.25 +51 54 02.7 17.6 c 704
2002-05-30 05:00:31 C 10 28 05.01 +51 53 49.5 18.1 c 704
2003-02-03 10:46:31 C 15 35 54.43 +12 31 17.4 c 699
2003-02-03 11:12:03 C 15 35 55.15 +12 31 20.3 c 699
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)