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
2020-01-01 08:44:23 S 07 50 29.726 +79 39 24.44 – V C57
2020-01-01 08:44:23 s 1 -116596.83 9 +385974.18 2760.0 – C57
2020-01-01 09:14:23 S 07 50 18.194 +79 39 43.38 – V C57
2020-01-01 09:14:23 s 1 -117435.38 1 +385401.82 2290.0 – C57
2020-01-01 09:44:23 S 07 50 06.396 +79 40 02.03 – V C57
2020-01-01 09:44:23 s 1 -118271.68 4 +384821.93 9410.0 – C57
2020-01-01 10:14:23 S 07 49 54.914 +79 40 20.28 – V C57
2020-01-01 10:14:23 s 1 -119105.72 7 +384234.49 4070.0 – C57
2020-01-01 10:44:23 S 07 49 43.171 +79 40 39.11 – V C57
2020-01-01 10:44:23 s 1 -119937.48 8 +383639.51 6230.0 – C57
2020-01-01 11:14:23 S 07 49 31.632 +79 40 56.96 – V C57
2020-01-01 11:14:23 s 1 -120766.94 4 +383036.97 5860.0 – C57
2020-01-01 11:44:23 S 07 49 19.807 +79 41 15.72 – V C57
2020-01-01 11:44:23 s 1 -121594.07 3 +382426.87 2910.0 – C57
2020-01-01 12:14:23 S 07 49 08.323 +79 41 33.47 – V C57
2020-01-01 12:14:23 s 1 -122418.85 2 +381809.21 7340.0 – C57
2020-01-01 12:44:23 S 07 48 56.496 +79 41 52.26 – V C57
2020-01-01 12:44:23 s 1 -123241.25 8 +381183.97 9120.0 – C57
2020-01-01 13:14:23 S 07 48 44.911 +79 42 09.54 – V C57
2020-01-01 13:14:23 s 1 -124061.26 9 +380551.14 8190.0 – C57
2020-01-01 13:44:23 S 07 48 33.358 +79 42 28.12 – V C57
2020-01-01 13:44:23 s 1 -124878.86 2 +379910.73 4510.0 – C57
2020-01-01 14:14:23 S 07 48 21.547 +79 42 46.12 – V C57
2020-01-01 14:14:23 s 1 -125694.01 3 +379262.72 8060.0 – C57
2020-01-01 14:44:23 S 07 48 09.809 +79 43 03.94 – V C57
2020-01-01 14:44:23 s 1 -126506.69 9 +378607.11 8770.0 – C57
2020-01-01 15:14:23 S 07 47 58.003 +79 43 21.65 – V C57
2020-01-01 15:14:23 s 1 -127316.89 7 +377943.88 6620.0 – C57
2020-01-01 15:44:23 S 07 47 46.394 +79 43 39.40 – V C57
2020-01-01 15:44:23 s 1 -128124.58 2 +377273.03 1550.0 – C57
2020-01-01 16:14:23 S 07 47 34.658 +79 43 56.68 – V C57
2020-01-01 16:14:23 s 1 -128929.73 1 +376594.56 3530.0 – C57
2020-01-01 16:44:23 S 07 47 22.730 +79 44 14.96 – V C57
2020-01-01 16:44:23 s 1 -129732.32 0 +375908.44 2520.0 – C57
2020-01-01 17:14:23 S 07 47 11.153 +79 44 32.06 – V C57
2020-01-01 17:14:23 s 1 -130532.32 4 +375214.69 8460.0 – C57
2020-01-01 17:44:23 S 07 46 59.090 +79 44 50.03 – V C57
2020-01-01 17:44:23 s 1 -131329.71 9 +374513.27 1310.0 – C57
2020-01-01 18:14:23 S 07 46 47.678 +79 45 06.91 – V C57
2020-01-01 18:14:23 s 1 -132124.48 1 +373804.19 1040.0 – C57
2020-01-01 18:44:23 S 07 46 35.856 +79 45 24.37 – V C57
2020-01-01 18:44:23 s 1 -132916.58 4 +373087.44 7590.0 – C57
2020-01-01 19:14:23 S 07 46 23.954 +79 45 42.05 – V C57
2020-01-01 19:14:23 s 1 -133706.00 4 +372363.01 920.0 – C57
2020-01-01 19:44:23 S 07 46 12.298 +79 45 58.72 – V C57
2020-01-01 19:44:23 s 1 -134492.71 5 +371630.88 1000.0 – C57
2020-01-01 20:14:23 S 07 46 00.130 +79 46 16.39 – V C57
2020-01-01 20:14:23 s 1 -135276.69 2 +370891.06 7760.0 – C57
2020-01-01 20:44:23 S 07 45 48.607 +79 46 32.84 – V C57
2020-01-01 20:44:23 s 1 -136057.90 9 +370143.52 1170.0 – C57
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)