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
2019-10-25 10:25:10 C 08 39 56.71 +22 27 54.9 – V 703
2019-10-25 10:32:38 C 08 39 57.22 +22 28 13.5 – V 703
2019-10-25 14:43:36 C 08 40 15.57 +22 38 31.4 – V T08
2019-10-25 14:48:14 C 08 40 15.89 +22 38 42.8 – V T08
2019-10-25 14:56:56 C 08 40 16.50 +22 39 04.2 – V T08
2019-10-25 15:15:31 C 08 40 17.80 +22 39 49.9 – V T08
2019-10-27 13:52:43 C 08 43 43.16 +24 34 38.9 – V T05
2019-10-27 14:07:10 C 08 43 44.17 +24 35 14.8 – V T05
2019-10-27 14:11:48 C 08 43 44.50 +24 35 26.4 – V T05
2019-10-27 14:20:40 C 08 43 45.11 +24 35 48.4 – V T05
2019-10-29 15:02:02 C 08 47 17.50 +26 37 02.9 – V T08
2019-10-29 15:08:03 C 08 47 17.90 +26 37 17.9 – V T08
2019-10-29 15:16:58 C 08 47 18.50 +26 37 40.7 – V T08
2019-10-29 15:21:53 C 08 47 18.86 +26 37 52.8 – V T08
2019-10-29 15:34:10 C 08 47 19.70 +26 38 23.6 – V T08
2019-10-30 09:42:31 C 08 48 38.78 +27 23 47.2 – V 703
2019-10-30 09:50:27 C 08 48 39.37 +27 24 07.3 – V 703
2019-10-30 09:58:24 C 08 48 39.91 +27 24 27.4 – V 703
2019-10-30 10:06:20 C 08 48 40.46 +27 24 47.5 – V 703
2019-10-31 05:08:28 S 08 50 01.430 +28 12 47.48 – L C51
2019-10-31 08:16:58 S 08 50 14.942 +28 20 43.08 – L C51
2019-10-31 11:24:33 S 08 50 28.382 +28 28 35.58 – L C51
2019-10-31 12:58:37 S 08 50 35.119 +28 32 33.04 – L C51
2019-10-31 12:58:48 S 08 50 35.138 +28 32 33.79 – L C51
2019-10-31 14:33:36 S 08 50 41.911 +28 36 33.73 – L C51
2019-10-31 16:07:40 S 08 50 48.646 +28 40 31.26 – L C51
2019-10-31 16:07:51 S 08 50 48.660 +28 40 31.84 – L C51
2019-10-31 17:41:55 S 08 50 55.385 +28 44 29.40 – L C51
2019-10-31 22:24:29 S 08 51 15.578 +28 56 23.71 – L C51
2019-11-01 01:32:48 S 08 51 29.002 +29 04 20.10 – L C51
2019-11-01 04:40:35 S 08 51 42.396 +29 12 14.83 – L C51
2019-11-02 14:18:28 C 08 54 06.54 +30 37 38.4 – V T08
2019-11-02 14:23:04 C 08 54 06.85 +30 37 50.1 – V T08
2019-11-02 14:30:31 C 08 54 07.35 +30 38 09.2 – V T08
2019-11-02 14:44:46 C 08 54 08.30 +30 38 45.7 – V T08
2019-11-04 14:44:10 C 08 57 29.61 +32 41 23.5 – V T05
2019-11-04 14:49:28 C 08 57 29.96 +32 41 37.0 – V T05
2019-11-04 15:01:51 C 08 57 30.77 +32 42 09.0 – V T05
2019-11-04 15:26:33 C 08 57 32.37 +32 43 12.4 – V T05
2019-11-05 09:42:18 C 08 58 48.44 +33 29 59.8 – V 703
2019-11-05 09:49:38 C 08 58 48.94 +33 30 19.6 – V 703
2019-11-05 09:56:57 C 08 58 49.43 +33 30 37.0 – V 703
2019-11-05 10:04:16 C 08 58 49.90 +33 30 56.7 – V 703
2019-11-07 13:43:45 C 09 02 20.26 +35 44 06.2 – V T08
2019-11-07 13:49:31 C 09 02 20.63 +35 44 21.2 – V T08
2019-11-07 13:56:58 C 09 02 21.10 +35 44 40.6 – V T08
2019-11-07 14:15:44 C 09 02 22.28 +35 45 29.4 – V T08
2019-11-07 15:41:41 C 09 02 27.66 +35 49 12.4 – V T08
2019-11-09 14:20:53 C 09 05 32.91 +37 49 51.5 – V T05
2019-11-09 14:21:32 C 09 05 32.94 +37 49 53.1 – V T05
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)