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
2020-01-05 09:44:23 S 07 11 21.720 +80 18 34.85 – V C57
2020-01-05 09:44:23 s 1 -190432.20 4 +114463.37 7060.0 – C57
2020-01-05 10:14:23 S 07 11 09.893 +80 18 40.21 – V C57
2020-01-05 10:14:23 s 1 -189838.51 0 +112044.98 9220.0 – C57
2020-01-05 10:44:23 S 07 10 57.641 +80 18 45.90 – V C57
2020-01-05 10:44:23 s 1 -189222.68 0 +109613.51 2800.0 – C57
2020-01-05 11:14:23 S 07 10 45.864 +80 18 51.12 – V C57
2020-01-05 11:14:23 s 1 -188584.26 2 +107168.93 6960.0 – C57
2020-01-05 11:44:23 S 07 10 33.770 +80 18 55.87 – V C57
2020-01-05 11:44:23 s 1 -187922.78 4 +104711.23 780.0 – C57
2020-01-05 12:14:23 S 07 10 21.888 +80 19 00.73 – V C57
2020-01-05 12:14:23 s 1 -187237.76 3 +102240.39 3350.0 – C57
2020-01-05 12:44:23 S 07 10 10.037 +80 19 05.38 – V C57
2020-01-05 12:44:23 s 1 -186528.69 8 +99756.410 3690.0 – C57
2020-01-05 13:14:23 S 07 09 58.034 +80 19 09.84 – V C57
2020-01-05 13:14:23 s 1 -185795.07 4 +97259.270 830.0 – C57
2020-01-05 13:44:23 S 07 09 46.262 +80 19 14.59 – V C57
2020-01-05 13:44:23 s 1 -185036.35 7 +94748.977 3730.0 – C57
2020-01-05 14:14:23 S 07 09 34.226 +80 19 19.81 – V C57
2020-01-05 14:14:23 s 1 -184251.99 7 +92225.533 1320.0 – C57
2020-01-05 14:44:23 S 07 09 22.342 +80 19 24.56 – V C57
2020-01-05 14:44:23 s 1 -183441.42 6 +89688.950 2520.0 – C57
2020-01-05 15:14:23 S 07 09 10.469 +80 19 29.14 – V C57
2020-01-05 15:14:23 s 1 -182604.05 4 +87139.245 6190.0 – C57
2020-01-05 15:44:23 S 07 08 58.589 +80 19 33.28 – V C57
2020-01-05 15:44:23 s 1 -181739.27 5 +84576.441 1130.0 – C57
2020-01-05 16:14:23 S 07 08 46.841 +80 19 37.45 – V C57
2020-01-05 16:14:23 s 1 -180846.45 8 +82000.571 6130.0 – C57
2020-01-05 16:44:23 S 07 08 34.958 +80 19 41.41 – V C57
2020-01-05 16:44:23 s 1 -179924.95 4 +79411.673 9930.0 – C57
2020-01-05 17:14:23 S 07 08 23.261 +80 19 45.19 – V C57
2020-01-05 17:14:23 s 1 -178974.09 0 +76809.797 1200.0 – C57
2020-01-05 17:44:23 S 07 08 11.201 +80 19 49.48 – V C57
2020-01-05 17:44:23 s 1 -177993.16 7 +74195.003 8590.0 – C57
2020-01-05 18:14:23 S 07 07 59.652 +80 19 53.29 – V C57
2020-01-05 18:14:23 s 1 -176981.46 5 +71567.358 670.0 – C57
2020-01-05 18:44:23 S 07 07 47.875 +80 19 57.90 – V C57
2020-01-05 18:44:23 s 1 -175938.23 4 +68926.944 5980.0 – C57
2020-01-05 19:14:23 S 07 07 35.976 +80 20 02.08 – V C57
2020-01-05 19:14:23 s 1 -174862.70 0 +66273.856 2990.0 – C57
2020-01-05 19:44:23 S 07 07 24.576 +80 20 05.35 – V C57
2020-01-05 19:44:23 s 1 -173754.06 0 +63608.200 110.0 – C57
2020-01-05 20:14:23 S 07 07 12.432 +80 20 08.92 – V C57
2020-01-05 20:14:23 s 1 -172611.47 9 +60930.100 5700.0 – C57
2020-01-05 20:44:23 S 07 07 01.025 +80 20 12.70 – V C57
2020-01-05 20:44:23 s 1 -171434.09 5 +58239.694 8040.0 – C57
2020-01-05 21:14:23 S 07 06 49.414 +80 20 16.19 – V C57
2020-01-05 21:14:23 s 1 -170221.00 8 +55537.140 5340.0 – C57
2020-01-05 21:44:23 S 07 06 37.709 +80 20 19.43 – V C57
2020-01-05 21:44:23 s 1 -168971.29 0 +52822.614 5750.0 – 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)