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
2020-01-03 09:44:23 S 07 30 55.776 +80 04 35.04 – V C57
2020-01-03 09:44:23 s 1 -184031.10 7 +292475.62 710.0 – C57
2020-01-03 10:07:33 C 07 31 21.06 +79 56 21.2 – o D54
2020-01-03 10:10:36 C 07 31 19.81 +79 56 22.8 – o D54
2020-01-03 10:14:23 S 07 30 43.790 +80 04 46.42 – V C57
2020-01-03 10:14:23 s 1 -184510.19 6 +291107.03 6850.0 – C57
2020-01-03 10:44:23 S 07 30 31.260 +80 04 58.08 – V C57
2020-01-03 10:44:23 s 1 -184983.56 6 +289729.35 4500.0 – C57
2020-01-03 10:52:45 C 07 31 03.50 +79 56 43.4 – o D54
2020-01-03 10:54:14 C 07 31 03.02 +79 56 44.1 – o D54
2020-01-03 10:55:43 C 07 31 02.35 +79 56 44.8 – o D54
2020-01-03 11:14:23 S 07 30 19.157 +80 05 11.15 – V C57
2020-01-03 11:14:23 s 1 -185451.15 4 +288342.56 3550.0 – C57
2020-01-03 11:44:23 S 07 30 06.850 +80 05 22.24 – V C57
2020-01-03 11:44:23 s 1 -185912.90 1 +286946.64 3890.0 – C57
2020-01-03 12:14:23 S 07 29 54.634 +80 05 33.83 – V C57
2020-01-03 12:14:23 s 1 -186368.74 3 +285541.54 5430.0 – C57
2020-01-03 12:44:23 S 07 29 42.331 +80 05 46.36 – V C57
2020-01-03 12:44:23 s 1 -186818.61 8 +284127.26 8040.0 – C57
2020-01-03 13:14:23 S 07 29 30.086 +80 05 57.62 – V C57
2020-01-03 13:14:23 s 1 -187262.46 2 +282703.74 1620.0 – C57
2020-01-03 13:44:23 S 07 29 17.930 +80 06 08.75 – V C57
2020-01-03 13:44:23 s 1 -187700.21 0 +281270.98 6050.0 – C57
2020-01-03 14:14:23 S 07 29 05.390 +80 06 21.35 – V C57
2020-01-03 14:14:23 s 1 -188131.79 5 +279828.92 1220.0 – C57
2020-01-03 14:44:23 S 07 28 53.294 +80 06 32.29 – V C57
2020-01-03 14:44:23 s 1 -188557.15 2 +278377.56 7020.0 – C57
2020-01-03 15:14:23 S 07 28 40.930 +80 06 43.27 – V C57
2020-01-03 15:14:23 s 1 -188976.21 0 +276916.84 3320.0 – C57
2020-01-03 15:44:23 S 07 28 28.764 +80 06 55.22 – V C57
2020-01-03 15:44:23 s 1 -189388.90 3 +275446.75 0.0 – C57
2020-01-03 16:14:23 S 07 28 16.582 +80 07 06.42 – V C57
2020-01-03 16:14:23 s 1 -189795.16 0 +273967.25 6950.0 – C57
2020-01-03 16:44:23 S 07 28 04.080 +80 07 17.18 – V C57
2020-01-03 16:44:23 s 1 -190194.90 8 +272478.31 4030.0 – C57
2020-01-03 17:14:23 S 07 27 51.974 +80 07 29.14 – V C57
2020-01-03 17:14:23 s 1 -190588.07 7 +270979.89 1120.0 – C57
2020-01-03 17:44:23 S 07 27 39.494 +80 07 40.04 – V C57
2020-01-03 17:44:23 s 1 -190974.59 3 +269471.97 8090.0 – C57
2020-01-03 18:14:23 S 07 27 27.480 +80 07 50.16 – V C57
2020-01-03 18:14:23 s 1 -191354.38 0 +267954.51 4820.0 – C57
2020-01-03 18:44:23 S 07 27 15.070 +80 08 01.79 – V C57
2020-01-03 18:44:23 s 1 -191727.36 4 +266427.48 1170.0 – C57
2020-01-03 19:14:23 S 07 27 02.618 +80 08 12.91 – V C57
2020-01-03 19:14:23 s 1 -192093.46 7 +264890.84 7000.0 – C57
2020-01-03 19:44:23 S 07 26 50.645 +80 08 22.63 – V C57
2020-01-03 19:44:23 s 1 -192452.61 1 +263344.56 2170.0 – C57
2020-01-03 20:14:23 S 07 26 37.997 +80 08 33.90 – V C57
2020-01-03 20:14:23 s 1 -192804.71 6 +261788.60 6560.0 – C57
2020-01-03 20:44:23 S 07 26 25.793 +80 08 44.99 – 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)