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
2020-01-13 09:44:23 s 1 -47993.260 0 +409047.90 4440.0 – C57
2020-01-13 10:14:23 S 06 01 21.199 +80 27 06.23 – V C57
2020-01-13 10:14:23 s 1 -48996.801 0 +409095.93 1800.0 – C57
2020-01-13 11:14:23 S 06 01 01.042 +80 26 52.37 – V C57
2020-01-13 11:14:23 s 1 -51001.260 0 +409169.19 2970.0 – C57
2020-01-13 11:44:23 S 06 00 50.777 +80 26 45.56 – V C57
2020-01-13 11:44:23 s 1 -52002.141 0 +409194.42 6840.0 – C57
2020-01-13 12:14:23 S 06 00 40.529 +80 26 38.44 – V C57
2020-01-13 12:14:23 s 1 -53002.099 0 +409212.07 9600.0 – C57
2020-01-13 12:44:23 S 06 00 30.578 +80 26 31.63 – V C57
2020-01-13 12:44:23 s 1 -54001.115 0 +409222.14 1300.0 – C57
2020-01-13 13:14:23 S 06 00 20.239 +80 26 24.86 – V C57
2020-01-13 13:14:23 s 1 -55001.150 0 +409223.93 3890.0 – C57
2020-01-13 13:44:23 S 06 00 10.289 +80 26 18.02 – V C57
2020-01-13 13:44:23 s 1 -55998.228 0 +409218.87 3550.0 – C57
2020-01-13 14:14:23 S 06 00 00.101 +80 26 10.93 – V C57
2020-01-13 14:14:23 s 1 -56994.309 0 +409206.25 2230.0 – C57
2020-01-13 14:44:23 S 05 59 49.956 +80 26 03.95 – V C57
2020-01-13 14:44:23 s 1 -57989.375 0 +409186.08 9960.0 – C57
2020-01-13 15:14:23 S 05 59 40.022 +80 25 57.07 – V C57
2020-01-13 15:14:23 s 1 -58983.408 0 +409158.38 6770.0 – C57
2020-01-13 16:14:23 S 05 59 19.798 +80 25 42.56 – V C57
2020-01-13 16:14:23 s 1 -60968.299 0 +409080.38 7750.0 – C57
2020-01-13 16:44:23 S 05 59 09.497 +80 25 35.58 – V C57
2020-01-13 16:44:23 s 1 -61959.122 0 +409030.10 1990.0 – C57
2020-01-13 17:02:50 C 05 59 38.96 +80 16 40.2 – V A16
2020-01-13 17:10:14 C 05 59 36.63 +80 16 38.6 – V A16
2020-01-13 17:14:23 S 05 58 59.458 +80 25 27.95 – V C57
2020-01-13 17:14:23 s 1 -62948.838 0 +408972.31 5430.0 – C57
2020-01-13 17:17:37 C 05 59 34.31 +80 16 37.0 – V A16
2020-01-13 17:26:02 C 05 59 31.66 +80 16 35.3 – V A16
2020-01-13 17:44:23 S 05 58 49.598 +80 25 20.68 – V C57
2020-01-13 17:44:23 s 1 -63937.429 0 +408907.01 8110.0 – C57
2020-01-13 17:59:47 C 05 59 20.94 +80 16 28.0 – V A16
2020-01-13 18:14:23 S 05 58 39.530 +80 25 13.62 – V C57
2020-01-13 18:14:23 s 1 -64924.877 0 +408834.22 50.0 – C57
2020-01-13 18:44:23 S 05 58 29.683 +80 25 05.74 – V C57
2020-01-13 18:44:23 s 1 -65911.164 0 +408753.94 1280.0 – C57
2020-01-13 19:14:23 S 05 58 19.610 +80 24 58.10 – V C57
2020-01-13 19:14:23 s 1 -66896.271 0 +408666.17 1840.0 – C57
2020-01-13 19:44:23 S 05 58 09.689 +80 24 50.83 – V C57
2020-01-13 19:44:23 s 1 -67880.181 0 +408570.92 1750.0 – C57
2020-01-13 20:14:23 S 05 57 59.784 +80 24 43.70 – V C57
2020-01-13 20:14:23 s 1 -68862.875 0 +408468.19 1040.0 – C57
2020-01-13 20:44:23 S 05 57 49.865 +80 24 36.14 – V C57
2020-01-13 20:44:23 s 1 -69844.334 0 +408358.00 9750.0 – C57
2020-01-13 21:14:23 S 05 57 40.126 +80 24 28.69 – V C57
2020-01-13 21:14:23 s 1 -70824.542 0 +408240.35 7910.0 – C57
2020-01-13 21:44:23 S 05 57 30.022 +80 24 21.17 – V C57
2020-01-13 21:44:23 s 1 -71803.479 0 +408115.24 5530.0 – 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)