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
2020-01-17 03:44:23 S 05 34 37.390 +79 57 05.80 – V C57
2020-01-17 03:44:23 s 1 -195564.55 0 +297150.83 8100.0 – C57
2020-01-17 04:14:23 S 05 34 29.794 +79 56 53.12 – V C57
2020-01-17 04:14:23 s 1 -196062.88 4 +295827.86 9520.0 – C57
2020-01-17 04:44:23 S 05 34 22.186 +79 56 39.48 – V C57
2020-01-17 04:44:23 s 1 -196555.52 7 +294496.43 4870.0 – C57
2020-01-17 05:14:23 S 05 34 14.609 +79 56 26.30 – V C57
2020-01-17 05:14:23 s 1 -197042.42 5 +293156.50 4070.0 – C57
2020-01-17 05:44:23 S 05 34 07.169 +79 56 13.49 – V C57
2020-01-17 05:44:23 s 1 -197523.52 4 +291808.05 7050.0 – C57
2020-01-17 06:14:23 S 05 33 59.496 +79 55 59.74 – V C57
2020-01-17 06:14:23 s 1 -197998.76 7 +290451.08 3730.0 – C57
2020-01-17 06:44:23 S 05 33 52.270 +79 55 47.10 – V C57
2020-01-17 06:44:23 s 1 -198468.10 0 +289085.54 4020.0 – C57
2020-01-17 07:14:23 S 05 33 44.513 +79 55 34.14 – V C57
2020-01-17 07:14:23 s 1 -198931.46 4 +287711.43 7860.0 – C57
2020-01-17 07:44:23 S 05 33 36.982 +79 55 20.46 – V C57
2020-01-17 07:44:23 s 1 -199388.80 3 +286328.72 5150.0 – C57
2020-01-17 08:14:23 S 05 33 29.736 +79 55 07.18 – V C57
2020-01-17 08:14:23 s 1 -199840.05 8 +284937.39 5810.0 – C57
2020-01-17 08:44:23 S 05 33 22.277 +79 54 53.96 – V C57
2020-01-17 08:44:23 s 1 -200285.16 9 +283537.42 9760.0 – C57
2020-01-17 09:14:23 S 05 33 14.748 +79 54 40.72 – V C57
2020-01-17 09:14:23 s 1 -200724.07 6 +282128.77 6910.0 – C57
2020-01-17 09:44:23 S 05 33 07.258 +79 54 27.18 – V C57
2020-01-17 09:44:23 s 1 -201156.71 9 +280711.44 7190.0 – C57
2020-01-17 10:14:23 S 05 32 59.926 +79 54 14.11 – V C57
2020-01-17 10:14:23 s 1 -201583.03 5 +279285.39 490.0 – C57
2020-01-17 10:44:23 S 05 32 52.301 +79 54 00.50 – V C57
2020-01-17 10:44:23 s 1 -202002.96 2 +277850.60 6730.0 – C57
2020-01-17 11:14:23 S 05 32 45.053 +79 53 46.79 – V C57
2020-01-17 11:14:23 s 1 -202416.43 7 +276407.05 5820.0 – C57
2020-01-17 11:44:23 S 05 32 37.896 +79 53 33.32 – V C57
2020-01-17 11:44:23 s 1 -202823.39 4 +274954.71 7670.0 – C57
2020-01-17 12:14:23 S 05 32 30.468 +79 53 19.90 – V C57
2020-01-17 12:14:23 s 1 -203223.76 9 +273493.57 2190.0 – C57
2020-01-17 12:44:23 S 05 32 23.066 +79 53 06.54 – V C57
2020-01-17 12:44:23 s 1 -203617.49 4 +272023.59 9270.0 – C57
2020-01-17 13:14:23 S 05 32 15.614 +79 52 52.64 – V C57
2020-01-17 13:14:23 s 1 -204004.50 3 +270544.74 8840.0 – C57
2020-01-17 13:44:23 S 05 32 08.525 +79 52 39.14 – V C57
2020-01-17 13:44:23 s 1 -204384.72 8 +269057.02 780.0 – C57
2020-01-17 14:14:23 S 05 32 01.159 +79 52 25.36 – V C57
2020-01-17 14:14:23 s 1 -204758.09 8 +267560.38 5010.0 – C57
2020-01-17 14:44:23 S 05 31 54.017 +79 52 11.86 – V C57
2020-01-17 14:44:23 s 1 -205124.54 3 +266054.81 1410.0 – C57
2020-01-17 15:14:23 S 05 31 46.925 +79 51 58.46 – V C57
2020-01-17 15:14:23 s 1 -205483.99 2 +264540.27 9890.0 – C57
2020-01-17 16:14:23 S 05 31 32.366 +79 51 30.71 – V C57
2020-01-17 16:14:23 s 1 -206181.60 9 +261484.21 2680.0 – 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)