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
2003-06-01 04:44:41 C 14 03 19.88 +15 52 23.9 c 333
2003-06-01 04:47:16 C 14 03 19.71 +15 52 22.4 c 333
2003-06-01 04:53:50 C 14 03 19.289 +15 52 18.04 g 689
2003-06-01 04:56:21 C 14 03 19.15 +15 52 17.3 c 333
2003-06-01 04:58:52 C 14 03 19.00 +15 52 15.8 c 333
2003-06-01 05:01:24 C 14 03 18.84 +15 52 14.2 c 333
2003-06-01 05:03:54 C 14 03 18.69 +15 52 13.1 c 333
2003-06-01 21:16:22 C 14 02 21.04 +15 43 00.2 c 198
2003-06-01 21:21:37 C 14 02 20.70 +15 42 57.2 c 198
2003-06-01 21:34:45 C 14 02 19.92 +15 42 49.7 c 198
2003-06-02 01:40:08 C 14 02 05.64 +15 40 31.5 d H72
2003-06-02 01:42:48 C 14 02 05.48 +15 40 30.2 d H72
2003-06-02 01:47:07 C 14 02 05.22 +15 40 27.5 d H72
2003-06-02 01:49:56 C 14 02 05.07 +15 40 25.7 d H72
2003-06-02 01:52:06 C 14 02 04.98 +15 40 24.4 d H72
2003-06-02 01:54:15 C 14 02 04.85 +15 40 23.3 d H72
2003-06-02 01:56:26 C 14 02 04.70 +15 40 22.3 d H72
2003-06-02 05:14:25 C 14 01 52.95 +15 38 27.5 c 704
2003-06-02 05:29:52 C 14 01 52.03 +15 38 18.7 c 704
2003-06-02 05:45:36 C 14 01 51.08 +15 38 09.5 c 704
2003-06-02 06:01:14 C 14 01 50.16 +15 38 00.6 c 704
2003-06-02 06:16:43 C 14 01 49.25 +15 37 51.5 c 704
2003-06-03 02:04:30 C 14 00 40.95 +15 26 22.7 15.0 d H72
2003-06-03 02:06:45 C 14 00 40.70 +15 26 20.5 15.1 d H72
2003-06-03 02:10:15 C 14 00 40.62 +15 26 18.8 15.2 d H72
2003-06-03 02:12:26 C 14 00 40.46 +15 26 17.8 15.1 d H72
2003-06-03 02:14:35 C 14 00 40.36 +15 26 16.4 15.1 d H72
2003-06-03 02:16:45 C 14 00 40.17 +15 26 15.0 15.0 d H72
2003-06-03 02:18:55 C 14 00 40.02 +15 26 14.0 15.3 d H72
2003-06-03 04:42:38 C 14 00 31.794 +15 24 47.49 g 689
2003-06-04 04:37:33 C 13 59 11.014 +15 10 37.65 g 689
2003-06-06 04:26:44 C 13 56 35.863 +14 41 25.07 g 689
2003-06-07 21:33:59 C 13 54 29.20 +14 15 29.3 J87
2003-06-07 21:39:54 C 13 54 28.92 +14 15 25.2 J87
2003-06-07 21:43:31 C 13 54 28.81 +14 15 23.2 J87
2003-06-14 23:17:00 C 13 46 55.40 +12 21 41.0 m 859
2003-06-14 23:26:57 C 13 46 54.98 +12 21 34.0 m 859
2003-06-14 23:32:39 C 13 46 54.78 +12 21 31.6 m 859
2003-06-19 21:43:25 C 13 42 44.91 +10 56 47.5 434
2003-06-19 21:48:48 C 13 42 44.58 +10 56 45.3 434
2003-06-20 20:31:15 C 13 42 03.04 +10 40 06.7 A30
2003-06-20 20:40:50 C 13 42 02.74 +10 39 59.7 A30
2003-06-20 20:51:28 C 13 42 02.44 +10 39 51.9 A30
2003-06-21 20:46:51 C 13 41 20.73 +10 22 11.7 J87
2003-06-21 20:52:26 C 13 41 20.59 +10 22 08.3 J87
2003-06-21 20:56:11 C 13 41 20.46 +10 22 05.1 J87
2003-06-21 21:30:17 C 13 41 19.40 +10 21 39.6 c 215
2003-06-21 21:31:02 C 13 41 19.37 +10 21 39.0 c 215
2003-06-21 21:31:46 C 13 41 19.34 +10 21 38.4 c 215
2003-06-23 04:18:37 C 13 40 28.87 +09 58 45.7 c 704
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)