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
2007-03-13 21:15:14 C 06 22 08.36 +70 30 36.7 – c A24
2007-03-13 21:26:06 C 06 22 09.18 +70 30 30.7 – c A24
2007-03-13 21:27:31 C 06 22 09.29 +70 30 29.9 – c A24
2007-03-13 21:38:27 C 06 22 10.12 +70 30 23.9 – c A24
2007-03-13 21:48:39 C 06 22 10.91 +70 30 18.2 – c A24
2007-03-13 21:58:30 C 06 22 11.64 +70 30 12.6 – c A24
2007-03-13 21:59:55 C 06 22 11.76 +70 30 11.8 – c A24
2007-03-13 22:10:37 C 06 22 12.57 +70 30 05.2 – c A24
2007-03-13 22:20:34 C 06 22 13.32 +70 30 00.3 – c A24
2007-03-13 22:30:10 C 06 22 14.05 +70 29 55.0 – c A24
2007-03-13 22:31:36 C 06 22 14.17 +70 29 54.1 – c A24
2007-03-13 22:45:20 C 06 22 15.22 +70 29 46.6 – c A24
2007-03-13 23:00:53 C 06 22 16.38 +70 29 38.0 – c A24
2007-03-13 23:18:16 C 06 22 17.70 +70 29 28.4 – c A24
2007-03-13 23:35:56 C 06 22 19.04 +70 29 18.6 – c A24
2007-03-13 23:53:11 C 06 22 20.34 +70 29 09.1 – c A24
2007-03-14 00:11:59 C 06 22 21.76 +70 28 58.7 – c A24
2007-03-14 00:30:46 C 06 22 23.18 +70 28 48.3 – c A24
2007-03-14 20:33:23 C 06 23 57.81 +70 17 54.3 – c A24
2007-03-14 20:51:06 C 06 23 59.19 +70 17 44.4 – c A24
2007-03-14 21:11:20 C 06 24 00.75 +70 17 33.1 – c A24
2007-03-14 21:12:47 C 06 24 00.86 +70 17 32.4 – c A24
2007-03-14 21:22:29 C 06 24 01.60 +70 17 26.9 – c A24
2007-03-14 21:33:37 C 06 24 02.46 +70 17 20.7 – c A24
2007-03-14 21:43:19 C 06 24 03.21 +70 17 15.5 – c A24
2007-03-14 21:44:46 C 06 24 03.31 +70 17 14.5 – c A24
2007-03-14 21:54:25 C 06 24 04.05 +70 17 09.2 – c A24
2007-03-14 22:05:29 C 06 24 04.95 +70 17 03.0 – c A24
2007-03-14 22:15:08 C 06 24 05.68 +70 16 57.7 – c A24
2007-03-14 22:16:35 C 06 24 05.78 +70 16 56.9 – c A24
2007-03-14 22:31:49 C 06 24 06.98 +70 16 48.4 – c A24
2007-03-14 22:47:23 C 06 24 08.19 +70 16 39.8 – c A24
2007-03-14 23:02:59 C 06 24 09.39 +70 16 31.1 – c A24
2007-03-14 23:19:10 C 06 24 10.64 +70 16 22.1 – c A24
2007-03-15 00:54:01 C 06 24 18.39 +70 15 28.1 – o 084
2007-03-15 00:56:10 C 06 24 18.55 +70 15 26.8 – o 084
2007-03-15 19:49:57 C 06 25 48.80 +70 05 14.2 – c A24
2007-03-15 20:05:08 C 06 25 50.09 +70 05 05.6 – c A24
2007-03-15 20:19:53 C 06 25 51.19 +70 04 57.4 – c A24
2007-03-15 20:21:24 C 06 25 51.30 +70 04 56.5 – c A24
2007-03-15 20:29:02 C 06 25 51.94 +70 04 52.3 – c A24
2007-03-15 20:38:09 C 06 25 52.65 +70 04 47.5 – c A24
2007-03-15 20:45:48 C 06 25 53.31 +70 04 43.4 – c A24
2007-03-15 20:47:15 C 06 25 53.33 +70 04 42.2 – c A24
2007-03-15 20:54:53 C 06 25 53.97 +70 04 38.2 – c A24
2007-03-15 21:03:58 C 06 25 54.63 +70 04 33.2 – c A24
2007-03-15 21:11:37 C 06 25 55.17 +70 04 29.0 – c A24
2007-03-15 21:13:04 C 06 25 55.36 +70 04 28.4 – c A24
2007-03-15 21:27:44 C 06 25 56.48 +70 04 20.0 – c A24
2007-03-15 21:43:46 C 06 25 57.73 +70 04 11.3 – c A24
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)