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
2020-06-05 07:42:01 C 09 09 25.931 +52 27 41.95 – U F51
2020-06-12 04:12:26 C 09 23 43.08 +51 01 35.6 – U I41
2020-06-12 04:19:33 C 09 23 43.68 +51 01 31.7 – U I41
2020-06-12 04:26:42 C 09 23 44.29 +51 01 27.9 – U I41
2020-06-12 04:33:48 C 09 23 44.90 +51 01 24.2 – U I41
2020-06-14 04:11:59 C 09 27 48.93 +50 36 21.3 – U I41
2020-06-14 04:19:09 C 09 27 49.54 +50 36 17.4 – U I41
2020-06-14 04:26:18 C 09 27 50.15 +50 36 13.6 – U I41
2020-06-14 04:33:29 C 09 27 50.75 +50 36 09.8 – U I41
2020-06-16 04:11:24 C 09 31 52.96 +50 11 04.5 – U I41
2020-06-16 04:18:45 C 09 31 53.57 +50 11 00.5 – U I41
2020-06-16 04:29:03 C 09 31 54.44 +50 10 55.0 – U I41
2020-06-18 04:19:50 C 09 35 55.94 +49 45 40.6 – U I41
2020-06-18 04:24:12 C 09 35 56.31 +49 45 38.3 – U I41
2020-06-18 04:27:01 C 09 35 56.54 +49 45 36.7 – U I41
2020-06-18 04:31:22 C 09 35 56.90 +49 45 34.5 – U I41
2020-06-18 04:34:12 C 09 35 57.14 +49 45 32.9 – U I41
2020-06-18 04:38:34 C 09 35 57.51 +49 45 30.6 – U I41
2020-06-18 04:40:40 C 09 35 57.67 +49 45 29.4 – U I41
2020-06-22 04:20:47 C 09 43 55.31 +48 54 56.2 – U I41
2020-06-22 04:27:55 C 09 43 55.90 +48 54 52.4 – U I41
2020-06-22 04:35:03 C 09 43 56.49 +48 54 48.6 – U I41
2020-06-22 04:42:10 C 09 43 57.07 +48 54 44.7 – U I41
2020-07-12 04:08:32 C 10 22 10.58 +44 41 15.6 – U I41
2020-07-12 04:15:38 C 10 22 11.13 +44 41 11.8 – U I41
2020-07-12 04:22:43 C 10 22 11.68 +44 41 08.1 – U I41
2020-07-12 04:29:47 C 10 22 12.22 +44 41 04.2 – U I41
2020-07-14 04:07:58 C 10 25 51.68 +44 15 59.5 – U I41
2020-07-14 04:15:08 C 10 25 52.23 +44 15 55.7 – U I41
2020-07-14 04:22:17 C 10 25 52.77 +44 15 51.8 – U I41
2020-07-14 04:29:28 C 10 25 53.34 +44 15 48.0 – U I41
2020-11-12 12:51:29 C 13 38 10.28 +23 49 00.9 – U I41
2020-11-12 12:58:14 C 13 38 10.66 +23 48 59.3 – U I41
2020-11-12 13:04:58 C 13 38 11.04 +23 48 57.8 – U I41
2020-11-12 13:11:41 C 13 38 11.42 +23 48 56.2 – U I41
2020-11-12 13:18:26 C 13 38 11.81 +23 48 54.7 – U I41
2020-11-28 15:24:36 C 13 59 35.85 +22 35 44.4 – V T08
2020-11-28 15:28:35 C 13 59 36.03 +22 35 43.9 – V T08
2020-11-28 15:35:53 C 13 59 36.46 +22 35 42.8 – V T08
2020-11-28 15:42:31 C 13 59 36.75 +22 35 41.7 – V T08
2020-12-06 14:51:59 C 14 09 40.14 +22 11 48.3 – V T08
2020-12-06 15:06:16 C 14 09 40.92 +22 11 47.4 – V T08
2020-12-06 15:24:59 C 14 09 41.86 +22 11 45.5 – V T08
2020-12-06 15:35:02 C 14 09 42.39 +22 11 44.2 – V T08
2020-12-14 15:11:51 C 14 19 21.14 +21 56 47.5 – V T08
2020-12-14 15:36:33 C 14 19 22.37 +21 56 45.8 – V T08
2020-12-14 15:45:11 C 14 19 22.76 +21 56 45.4 – V T08
2020-12-14 15:50:30 C 14 19 23.03 +21 56 45.5 – V T08
2020-12-24 15:02:48 C 14 30 41.34 +21 51 36.2 – V T05
2020-12-24 15:11:22 C 14 30 41.73 +21 51 36.0 – 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)