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
2019-12-30 07:14:23 s 1 -25744.818 0 +405730.92 3810.0 – C57
2019-12-30 07:44:23 S 08 08 34.836 +79 03 52.63 – V C57
2019-12-30 07:44:23 s 1 -26711.038 0 +405899.00 9100.0 – C57
2019-12-30 08:14:23 S 08 08 24.365 +79 04 17.11 – V C57
2019-12-30 08:14:23 s 1 -27676.830 0 +406059.40 3110.0 – C57
2019-12-30 08:44:23 S 08 08 13.886 +79 04 41.95 – V C57
2019-12-30 08:44:23 s 1 -28642.177 0 +406212.14 5890.0 – C57
2019-12-30 09:14:23 S 08 08 03.146 +79 05 07.55 – V C57
2019-12-30 09:14:23 s 1 -29607.060 0 +406357.22 7470.0 – C57
2019-12-30 09:44:23 S 08 07 52.711 +79 05 31.52 – V C57
2019-12-30 09:44:23 s 1 -30571.461 0 +406494.66 7890.0 – C57
2019-12-30 10:44:23 S 08 07 31.692 +79 06 20.66 – V C57
2019-12-30 10:44:23 s 1 -32498.753 0 +406746.63 5440.0 – C57
2019-12-30 11:14:23 S 08 07 21.209 +79 06 44.93 – V C57
2019-12-30 11:14:23 s 1 -33461.607 0 +406861.17 2630.0 – C57
2019-12-30 11:44:23 S 08 07 10.531 +79 07 08.47 – V C57
2019-12-30 11:44:23 s 1 -34423.911 0 +406968.11 8830.0 – C57
2019-12-30 12:14:23 S 08 07 00.070 +79 07 33.13 – V C57
2019-12-30 12:14:23 s 1 -35385.646 0 +407067.44 4080.0 – C57
2019-12-30 12:44:23 S 08 06 49.135 +79 07 58.37 – V C57
2019-12-30 12:44:23 s 1 -36346.797 0 +407159.17 8410.0 – C57
2019-12-30 13:14:23 S 08 06 38.803 +79 08 20.76 – V C57
2019-12-30 13:14:23 s 1 -37306.782 0 +407245.40 3260.0 – C57
2019-12-30 13:44:23 S 08 06 28.219 +79 08 45.82 – V C57
2019-12-30 13:44:23 s 1 -38266.709 0 +407321.98 5890.0 – C57
2019-12-30 14:14:23 S 08 06 17.338 +79 09 10.37 – V C57
2019-12-30 14:14:23 s 1 -39225.998 0 +407390.97 7720.0 – C57
2019-12-30 14:44:23 S 08 06 06.934 +79 09 33.23 – V C57
2019-12-30 14:44:23 s 1 -40184.633 0 +407452.41 8790.0 – C57
2019-12-30 15:14:23 S 08 05 56.066 +79 09 58.39 – V C57
2019-12-30 15:14:23 s 1 -41142.597 0 +407506.28 9130.0 – C57
2019-12-30 15:44:23 S 08 05 45.624 +79 10 22.30 – V C57
2019-12-30 15:44:23 s 1 -42099.872 0 +407552.59 8790.0 – C57
2019-12-30 16:14:23 S 08 05 34.762 +79 10 45.12 – V C57
2019-12-30 16:14:23 s 1 -43056.441 0 +407591.36 7800.0 – C57
2019-12-30 16:21:44 C 08 03 58.20 +79 01 38.9 – o D54
2019-12-30 16:34:20 C 08 03 53.97 +79 01 48.2 – o D54
2019-12-30 16:44:23 S 08 05 24.146 +79 11 09.46 – V C57
2019-12-30 16:44:23 s 1 -44012.288 0 +407622.59 6210.0 – C57
2019-12-30 17:14:23 S 08 05 13.663 +79 11 33.22 – V C57
2019-12-30 17:14:23 s 1 -44967.394 0 +407646.28 4040.0 – C57
2019-12-30 17:39:46 C 08 03 31.32 +79 02 37.5 – o D54
2019-12-30 17:44:23 S 08 05 02.628 +79 11 56.36 – V C57
2019-12-30 17:44:23 s 1 -45921.744 0 +407662.45 1340.0 – C57
2019-12-30 18:14:23 S 08 04 52.039 +79 12 20.05 – V C57
2019-12-30 18:14:23 s 1 -46875.319 0 +407671.09 8150.0 – C57
2019-12-30 18:44:23 S 08 04 41.256 +79 12 44.50 – V C57
2019-12-30 18:44:23 s 1 -47828.103 0 +407672.22 4490.0 – C57
2019-12-30 19:14:23 S 08 04 30.494 +79 13 06.85 – V C57
2019-12-30 19:14:23 s 1 -48780.079 0 +407665.83 420.0 – 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)