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
2019-07-09 14:14:30 s 1 -10661.951 0 +401378.96 1670.0 – C57
2019-07-09 14:44:30 S 07 02 36.881 -61 05 12.12 – V C57
2019-07-09 14:44:30 s 1 -11684.222 0 +401668.79 5700.0 – C57
2019-07-09 15:14:30 S 07 02 37.118 -61 03 59.22 – V C57
2019-07-09 15:14:30 s 1 -12706.215 0 +401950.76 4640.0 – C57
2019-07-09 15:44:30 S 07 02 37.493 -61 02 46.72 – V C57
2019-07-09 15:44:30 s 1 -13727.909 0 +402224.87 8570.0 – C57
2019-07-09 16:14:30 S 07 02 37.646 -61 01 35.15 – V C57
2019-07-09 16:14:30 s 1 -14749.286 0 +402491.15 7580.0 – C57
2019-07-09 16:44:30 S 07 02 37.865 -61 00 20.66 – V C57
2019-07-09 16:44:30 s 1 -15770.325 0 +402749.60 1760.0 – C57
2019-07-09 17:14:30 S 07 02 38.249 -60 59 09.67 – V C57
2019-07-09 17:14:30 s 1 -16791.007 0 +403000.24 1170.0 – C57
2019-07-09 17:44:30 S 07 02 38.441 -60 57 55.48 – V C57
2019-07-09 17:44:30 s 1 -17811.314 0 +403243.07 5920.0 – C57
2019-07-09 18:14:30 S 07 02 38.580 -60 56 45.20 – V C57
2019-07-09 18:14:30 s 1 -18831.225 0 +403478.11 6070.0 – C57
2019-07-09 18:44:30 S 07 02 38.966 -60 55 32.16 – V C57
2019-07-09 18:44:30 s 1 -19850.722 0 +403705.37 1710.0 – C57
2019-07-09 19:14:30 S 07 02 39.178 -60 54 18.18 – V C57
2019-07-09 19:14:30 s 1 -20869.785 0 +403924.86 2910.0 – C57
2019-07-09 19:44:30 S 07 02 39.331 -60 53 08.81 – V C57
2019-07-09 19:44:30 s 1 -21888.396 0 +404136.58 9770.0 – C57
2019-07-09 20:14:30 S 07 02 39.696 -60 51 54.25 – V C57
2019-07-09 20:14:30 s 1 -22906.536 0 +404340.56 2360.0 – C57
2019-07-09 20:44:30 S 07 02 39.941 -60 50 42.68 – V C57
2019-07-09 20:44:30 s 1 -23924.184 0 +404536.80 750.0 – C57
2019-07-09 23:14:30 S 07 02 41.054 -60 44 43.58 – V C57
2019-07-09 23:14:30 s 1 -29004.414 0 +405402.24 2630.0 – C57
2019-07-09 23:44:30 S 07 02 41.402 -60 43 29.42 – V C57
2019-07-09 23:44:30 s 1 -30018.727 0 +405552.25 7530.0 – C57
2019-07-10 00:14:30 S 07 02 41.563 -60 42 17.82 – V C57
2019-07-10 00:14:30 s 1 -31032.418 0 +405694.59 8790.0 – C57
2019-07-10 00:44:30 S 07 02 41.762 -60 41 07.08 – V C57
2019-07-10 00:44:30 s 1 -32045.470 0 +405829.26 6490.0 – C57
2019-07-10 01:14:30 S 07 02 42.142 -60 39 53.35 – V C57
2019-07-10 01:14:30 s 1 -33057.864 0 +405956.28 690.0 – C57
2019-07-10 01:44:30 S 07 02 42.314 -60 38 42.18 – V C57
2019-07-10 01:44:30 s 1 -34069.582 0 +406075.66 1490.0 – C57
2019-07-10 02:14:30 S 07 02 42.446 -60 37 29.06 – V C57
2019-07-10 02:14:30 s 1 -35080.604 0 +406187.40 8940.0 – C57
2019-07-10 02:44:30 S 07 02 42.794 -60 36 17.50 – V C57
2019-07-10 02:44:30 s 1 -36090.914 0 +406291.52 3140.0 – C57
2019-07-10 03:14:30 S 07 02 42.984 -60 35 05.78 – V C57
2019-07-10 03:14:30 s 1 -37100.493 0 +406388.01 4150.0 – C57
2019-07-10 03:44:30 S 07 02 43.102 -60 33 54.58 – V C57
2019-07-10 03:44:30 s 1 -38109.322 0 +406476.90 2050.0 – C57
2019-07-10 04:14:30 S 07 02 43.430 -60 32 43.15 – V C57
2019-07-10 04:14:30 s 1 -39117.384 0 +406558.18 6910.0 – C57
2019-07-10 04:44:30 S 07 02 43.654 -60 31 28.31 – V 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)