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
2023-02-14 21:45:30 C 13 26 04.94 +59 01 12.7 – q Y93
2023-02-14 23:31:18 C 13 26 00.30 +59 02 18.3 – q Y93
2023-02-14 23:32:24 C 13 26 00.18 +59 02 18.8 – q Y93
2023-02-14 23:33:31 C 13 26 00.09 +59 02 19.4 – q Y93
2023-02-15 00:09:51 C 13 25 58.502 +59 02 42.29 – q M16
2023-02-15 00:20:57 C 13 25 57.936 +59 02 50.46 – q M16
2023-02-15 07:13:22 C 13 25 39.11 +59 06 56.7 – V U55
2023-02-15 07:17:21 C 13 25 38.98 +59 06 59.2 – V U55
2023-02-15 07:21:20 C 13 25 38.79 +59 07 01.8 – V U55
2023-02-16 03:12:42 C 13 24 42.58 +59 18 53.5 – q Y93
2023-02-16 03:13:48 C 13 24 42.38 +59 18 54.9 – q Y93
2023-02-16 03:14:55 C 13 24 42.43 +59 18 54.4 – q Y93
2023-02-16 03:16:01 C 13 24 42.24 +59 18 56.2 – q Y93
2023-02-16 03:17:08 C 13 24 42.16 +59 18 56.7 – q Y93
2023-02-17 00:43:26 C 13 23 38.97 +59 31 31.3 – q Y93
2023-02-17 00:44:33 C 13 23 38.78 +59 31 32.8 – q Y93
2023-02-17 00:45:39 C 13 23 38.76 +59 31 33.6 – q Y93
2023-02-17 00:46:46 C 13 23 38.69 +59 31 33.6 – q Y93
2023-02-17 00:47:52 C 13 23 38.67 +59 31 34.0 – q Y93
2023-02-18 21:12:22 C 13 21 17.35 +59 56 56.8 – q Y93
2023-02-18 21:13:28 C 13 21 17.37 +59 56 55.4 – q Y93
2023-02-18 21:14:35 C 13 21 17.17 +59 56 56.3 – q Y93
2023-02-18 21:15:42 C 13 21 17.34 +59 56 59.8 – q Y93
2023-02-18 21:16:49 C 13 21 16.99 +59 57 00.2 – q Y93
2023-02-21 21:56:26 C 13 16 57.68 +60 36 21.3 – V 088
2023-02-21 22:01:12 C 13 16 57.37 +60 36 23.8 – V 088
2023-02-21 22:05:04 C 13 16 57.12 +60 36 25.8 – V 088
2023-02-21 22:07:37 C 13 16 56.96 +60 36 27.2 – V 088
2023-02-21 22:10:10 C 13 16 56.79 +60 36 28.6 – V 088
2023-02-21 22:12:43 C 13 16 56.63 +60 36 29.9 – V 088
2023-02-21 22:15:16 C 13 16 56.46 +60 36 31.3 – V 088
2023-02-21 22:17:49 C 13 16 56.30 +60 36 32.6 – V 088
2023-02-21 22:20:21 C 13 16 56.13 +60 36 34.0 – V 088
2023-02-21 22:22:54 C 13 16 55.97 +60 36 35.3 – V 088
2023-02-21 22:25:27 C 13 16 55.80 +60 36 36.7 – V 088
2023-02-21 22:28:00 C 13 16 55.64 +60 36 38.0 – V 088
2023-02-21 22:30:33 C 13 16 55.46 +60 36 39.3 – V 088
2023-02-21 22:33:06 C 13 16 55.31 +60 36 40.7 – V 088
2023-02-21 22:35:39 C 13 16 55.14 +60 36 42.1 – V 088
2023-02-21 22:38:12 C 13 16 54.98 +60 36 43.3 – V 088
2023-02-21 22:40:45 C 13 16 54.80 +60 36 44.7 – V 088
2023-02-21 22:43:18 C 13 16 54.64 +60 36 46.0 – V 088
2023-02-21 22:45:51 C 13 16 54.47 +60 36 47.3 – V 088
2023-02-21 22:48:24 C 13 16 54.30 +60 36 48.7 – V 088
2023-02-21 22:50:57 C 13 16 54.14 +60 36 50.2 – V 088
2023-02-21 22:53:30 C 13 16 53.99 +60 36 51.2 – V 088
2023-02-21 22:56:02 C 13 16 53.80 +60 36 52.7 – V 088
2023-02-21 22:58:35 C 13 16 53.63 +60 36 54.1 – V 088
2023-02-21 23:01:08 C 13 16 53.45 +60 36 55.4 – V 088
2023-02-21 23:03:41 C 13 16 53.31 +60 36 56.8 – V 088
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)