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 22:14:23 S 07 06 26.395 +80 20 22.74 – V C57
2020-01-05 22:14:23 s 1 -167683.97 2 +50096.314 7340.0 – C57
2020-01-05 22:44:23 S 07 06 14.414 +80 20 25.76 – V C57
2020-01-05 22:44:23 s 1 -166358.05 1 +47358.462 8090.0 – C57
2020-01-05 23:14:23 S 07 06 03.158 +80 20 28.93 – V C57
2020-01-05 23:14:23 s 1 -164992.48 5 +44609.303 5900.0 – C57
2020-01-05 23:44:23 S 07 05 51.348 +80 20 32.28 – V C57
2020-01-05 23:44:23 s 1 -163586.18 8 +41849.111 8590.0 – C57
2020-01-06 00:14:23 S 07 05 39.871 +80 20 35.63 – V C57
2020-01-06 00:14:23 s 1 -162138.03 4 +39078.192 3890.0 – C57
2020-01-06 00:44:23 S 07 05 28.378 +80 20 38.90 – V C57
2020-01-06 00:44:23 s 1 -160646.85 3 +36296.881 9410.0 – C57
2020-01-06 01:14:23 S 07 05 16.836 +80 20 42.11 – V C57
2020-01-06 01:14:23 s 1 -159111.42 4 +33505.553 2680.0 – C57
2020-01-07 22:44:23 S 06 50 07.786 +80 27 22.00 – V C57
2020-01-07 22:44:23 s 1 +132843.54 2 +53464.204 8210.0 – C57
2020-01-07 23:14:23 S 06 49 57.146 +80 27 30.28 – V C57
2020-01-07 23:14:23 s 1 +133813.93 3 +56812.330 2040.0 – C57
2020-01-07 23:44:23 S 06 49 46.394 +80 27 37.55 – V C57
2020-01-07 23:44:23 s 1 +134730.96 1 +60137.904 5270.0 – C57
2020-01-08 00:14:23 S 06 49 35.570 +80 27 44.82 – V C57
2020-01-08 00:14:23 s 1 +135596.56 7 +63440.635 1580.0 – C57
2020-01-08 00:44:23 S 06 49 24.941 +80 27 52.67 – V C57
2020-01-08 00:44:23 s 1 +136412.60 0 +66720.286 4490.0 – C57
2020-01-08 01:14:23 S 06 49 13.968 +80 27 59.62 – V C57
2020-01-08 01:14:23 s 1 +137180.82 4 +69976.671 7360.0 – C57
2020-01-08 01:44:23 S 06 49 03.194 +80 28 07.25 – V C57
2020-01-08 01:44:23 s 1 +137902.92 3 +73209.651 3420.0 – C57
2020-01-08 02:14:23 S 06 48 52.262 +80 28 14.70 – V C57
2020-01-08 02:14:23 s 1 +138580.50 0 +76419.124 5770.0 – C57
2020-01-08 05:44:23 S 06 47 35.366 +80 29 03.88 – V C57
2020-01-08 05:44:23 s 1 +142197.20 6 +98225.189 1920.0 – C57
2020-01-08 06:14:23 S 06 47 24.365 +80 29 10.25 – V C57
2020-01-08 06:14:23 s 1 +142568.31 5 +101246.44 1430.0 – C57
2020-01-08 06:44:23 S 06 47 13.351 +80 29 16.37 – V C57
2020-01-08 06:44:23 s 1 +142906.46 0 +104244.46 9890.0 – C57
2020-01-08 07:14:23 S 06 47 02.014 +80 29 23.96 – V C57
2020-01-08 07:14:23 s 1 +143212.66 2 +107219.37 9330.0 – C57
2020-01-08 07:44:23 S 06 46 51.062 +80 29 29.80 – V C57
2020-01-08 07:44:23 s 1 +143487.89 9 +110171.29 1710.0 – C57
2020-01-08 08:14:23 S 06 46 39.773 +80 29 36.38 – V C57
2020-01-08 08:14:23 s 1 +143733.10 9 +113100.35 8920.0 – C57
2020-01-08 08:44:23 S 06 46 28.810 +80 29 43.26 – V C57
2020-01-08 08:44:23 s 1 +143949.19 0 +116006.69 2780.0 – C57
2020-01-08 09:14:23 S 06 46 17.662 +80 29 49.31 – V C57
2020-01-08 09:14:23 s 1 +144137.00 5 +118890.46 5030.0 – C57
2020-01-08 09:44:23 S 06 46 06.278 +80 29 55.75 – V C57
2020-01-08 09:44:23 s 1 +144297.38 2 +121751.81 7340.0 – C57
2020-01-08 10:14:23 S 06 45 55.291 +80 30 02.27 – V C57
2020-01-08 10:14:23 s 1 +144431.11 4 +124590.91 1350.0 – 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)