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
2007-02-18 19:47:58 C 05 52 57.83 +75 42 35.9 c A24
2007-02-18 20:08:07 C 05 52 58.01 +75 42 24.2 c A24
2007-02-18 20:27:16 C 05 52 58.18 +75 42 13.1 c A24
2007-02-18 20:46:11 C 05 52 58.30 +75 42 01.8 c A24
2007-02-18 20:47:42 C 05 52 58.27 +75 42 01.2 c A24
2007-02-18 21:05:15 C 05 52 58.46 +75 41 50.8 c A24
2007-02-18 21:24:02 C 05 52 58.62 +75 41 40.0 c A24
2007-02-18 21:56:04 C 05 52 58.86 +75 41 21.7 c A24
2007-02-19 21:02:32 C 05 53 20.80 +75 27 58.9 c A24
2007-02-19 21:04:07 C 05 53 20.84 +75 27 58.3 c A24
2007-02-19 21:25:29 C 05 53 21.13 +75 27 45.7 c A24
2007-02-19 21:47:24 C 05 53 21.47 +75 27 32.8 c A24
2007-02-19 22:08:18 C 05 53 21.80 +75 27 20.9 c A24
2007-02-19 22:09:46 C 05 53 21.71 +75 27 19.5 c A24
2007-02-19 22:29:11 C 05 53 22.04 +75 27 08.4 c A24
2007-02-19 22:48:11 C 05 53 22.37 +75 26 57.1 c A24
2007-02-19 23:06:40 C 05 53 22.60 +75 26 46.4 c A24
2007-02-20 01:23:48 C 05 53 25.46 +75 25 23.2 16.1 o 084
2007-02-20 01:25:57 C 05 53 25.47 +75 25 22.0 16.1 o 084
2007-02-20 17:49:39 C 05 53 46.74 +75 15 57.3 15.7 o 084
2007-02-20 17:51:52 C 05 53 46.58 +75 15 55.8 15.9 o 084
2007-02-20 19:16:11 C 05 53 48.45 +75 15 08.6 c A24
2007-02-20 19:24:01 C 05 53 48.61 +75 15 04.0 c A24
2007-02-20 19:25:29 C 05 53 48.44 +75 15 02.9 c A24
2007-02-20 19:39:15 C 05 53 48.90 +75 14 55.1 c A24
2007-02-20 19:54:30 C 05 53 49.20 +75 14 46.3 c A24
2007-02-20 20:08:16 C 05 53 49.45 +75 14 38.2 c A24
2007-02-20 20:09:44 C 05 53 49.44 +75 14 37.5 c A24
2007-02-20 20:23:21 C 05 53 49.72 +75 14 29.5 c A24
2007-02-20 20:38:26 C 05 53 50.01 +75 14 20.8 c A24
2007-02-20 20:52:03 C 05 53 50.20 +75 14 12.8 c A24
2007-02-20 20:53:31 C 05 53 50.22 +75 14 12.0 c A24
2007-02-20 21:11:32 C 05 53 50.55 +75 14 01.5 c A24
2007-02-20 21:30:37 C 05 53 50.93 +75 13 50.2 c A24
2007-02-20 21:49:58 C 05 53 51.30 +75 13 39.0 c A24
2007-02-22 19:37:35 C 05 55 07.33 +74 47 15.1 c A24
2007-02-22 19:39:03 C 05 55 07.37 +74 47 14.5 c A24
2007-02-22 19:52:45 C 05 55 07.76 +74 47 06.5 c A24
2007-02-22 20:07:56 C 05 55 08.20 +74 46 57.8 c A24
2007-02-22 20:21:40 C 05 55 08.54 +74 46 49.6 c A24
2007-02-22 20:23:07 C 05 55 08.58 +74 46 48.8 c A24
2007-02-22 20:44:20 C 05 55 09.18 +74 46 36.5 c A24
2007-02-22 20:51:43 C 05 55 09.39 +74 46 32.2 c A24
2007-02-22 21:05:17 C 05 55 09.74 +74 46 24.2 c A24
2007-02-22 21:06:45 C 05 55 09.75 +74 46 23.3 c A24
2007-02-22 21:23:06 C 05 55 10.25 +74 46 13.9 c A24
2007-02-22 21:41:41 C 05 55 10.76 +74 46 03.1 c A24
2007-02-22 21:59:53 C 05 55 11.27 +74 45 52.6 c A24
2007-02-22 22:17:01 C 05 55 11.75 +74 45 42.6 c A24
2007-02-24 02:01:23 C 05 56 09.07 +74 29 41.1 16.2 o 084
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)