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
2020-01-14 23:44:23 S 05 49 13.277 +80 16 50.59 – V C57
2020-01-14 23:44:23 s 1 -120497.96 0 +391420.03 4560.0 – C57
2020-01-15 00:14:23 S 05 49 03.974 +80 16 41.20 – V C57
2020-01-15 00:14:23 s 1 -121382.77 5 +390903.77 1440.0 – C57
2020-01-15 00:44:23 S 05 48 54.900 +80 16 31.55 – V C57
2020-01-15 00:44:23 s 1 -122265.28 2 +390380.14 7190.0 – C57
2020-01-15 01:14:23 S 05 48 45.538 +80 16 21.65 – V C57
2020-01-15 01:14:23 s 1 -123145.46 2 +389849.13 1760.0 – C57
2020-01-15 01:44:23 S 05 48 36.708 +80 16 11.75 – V C57
2020-01-15 01:44:23 s 1 -124023.29 2 +389310.75 5140.0 – C57
2020-01-15 02:14:23 S 05 48 27.545 +80 16 01.99 – V C57
2020-01-15 02:14:23 s 1 -124898.75 1 +388764.99 7290.0 – C57
2020-01-15 02:44:23 S 05 48 18.355 +80 15 52.16 – V C57
2020-01-15 02:44:23 s 1 -125771.81 8 +388211.85 8170.0 – C57
2020-01-15 03:14:23 S 05 48 09.365 +80 15 42.77 – V C57
2020-01-15 03:14:23 s 1 -126642.47 1 +387651.32 7750.0 – C57
2020-01-15 03:44:23 S 05 47 59.986 +80 15 32.54 – V C57
2020-01-15 03:44:23 s 1 -127510.68 9 +387083.41 6000.0 – C57
2020-01-15 04:14:23 S 05 47 51.125 +80 15 22.86 – V C57
2020-01-15 04:14:23 s 1 -128376.44 9 +386508.11 2880.0 – C57
2020-01-15 04:44:23 S 05 47 41.918 +80 15 12.53 – V C57
2020-01-15 04:44:23 s 1 -129239.73 1 +385925.41 8360.0 – C57
2020-01-15 05:14:23 S 05 47 32.899 +80 15 02.23 – V C57
2020-01-15 05:14:23 s 1 -130100.51 1 +385335.31 2410.0 – C57
2020-01-15 05:44:23 S 05 47 24.278 +80 14 52.58 – V C57
2020-01-15 05:44:23 s 1 -130958.76 9 +384737.82 4990.0 – C57
2020-01-15 06:14:23 S 05 47 14.959 +80 14 42.61 – V C57
2020-01-15 06:14:23 s 1 -131814.48 0 +384132.92 6080.0 – C57
2020-01-15 06:44:23 S 05 47 06.000 +80 14 32.75 – V C57
2020-01-15 06:44:23 s 1 -132667.62 4 +383520.62 5620.0 – C57
2020-01-15 07:14:23 S 05 46 56.870 +80 14 22.13 – V C57
2020-01-15 07:14:23 s 1 -133518.17 7 +382900.90 3600.0 – C57
2020-01-15 07:44:23 S 05 46 48.120 +80 14 11.76 – V C57
2020-01-15 07:44:23 s 1 -134366.11 7 +382273.77 9970.0 – C57
2020-01-15 08:14:23 S 05 46 39.094 +80 14 01.79 – V C57
2020-01-15 08:14:23 s 1 -135211.42 1 +381639.21 4700.0 – C57
2020-01-15 08:44:23 S 05 46 30.156 +80 13 51.38 – V C57
2020-01-15 08:44:23 s 1 -136054.06 6 +380997.24 7760.0 – C57
2020-01-15 09:14:23 S 05 46 21.178 +80 13 41.27 – V C57
2020-01-15 09:14:23 s 1 -136894.02 9 +380347.83 9110.0 – C57
2020-01-15 09:44:23 S 05 46 12.206 +80 13 31.22 – V C57
2020-01-15 09:44:23 s 1 -137731.28 7 +379690.99 8710.0 – C57
2020-01-15 10:14:23 S 05 46 03.324 +80 13 20.64 – V C57
2020-01-15 10:14:23 s 1 -138565.81 6 +379026.71 6540.0 – C57
2020-01-15 10:44:23 S 05 45 54.406 +80 13 10.27 – V C57
2020-01-15 10:44:23 s 1 -139397.59 2 +378354.99 2540.0 – C57
2020-01-15 11:14:23 S 05 45 45.648 +80 13 00.12 – V C57
2020-01-15 11:14:23 s 1 -140226.59 3 +377675.82 6700.0 – C57
2020-01-15 11:44:23 S 05 45 37.073 +80 12 49.61 – V C57
2020-01-15 11:44:23 s 1 -141052.79 4 +376989.20 8970.0 – 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)