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
2019-12-29 01:44:23 s 1 +31348.014 0 +381790.95 8370.0 – C57
2019-12-29 02:14:23 S 08 18 27.818 +78 37 41.23 – V C57
2019-12-29 02:14:23 s 1 +30390.439 0 +382435.28 1230.0 – C57
2019-12-29 02:44:23 S 08 18 18.418 +78 38 09.56 – V C57
2019-12-29 02:44:23 s 1 +29432.096 0 +383071.03 9860.0 – C57
2019-12-29 03:14:23 S 08 18 08.381 +78 38 38.65 – V C57
2019-12-29 03:14:23 s 1 +28473.009 0 +383698.21 4320.0 – C57
2019-12-29 03:44:23 S 08 17 58.966 +78 39 05.44 – V C57
2019-12-29 03:44:23 s 1 +27513.203 0 +384316.86 4670.0 – C57
2019-12-29 04:14:23 S 08 17 49.308 +78 39 33.66 – V C57
2019-12-29 04:14:23 s 1 +26552.701 0 +384926.98 970.0 – C57
2019-12-29 04:44:23 S 08 17 39.569 +78 40 02.64 – V C57
2019-12-29 04:44:23 s 1 +25591.528 0 +385528.61 3290.0 – C57
2019-12-29 05:14:23 S 08 17 29.916 +78 40 30.61 – V C57
2019-12-29 05:14:23 s 1 +24629.707 0 +386121.77 1680.0 – C57
2019-12-29 05:44:23 S 08 17 19.994 +78 40 59.27 – V C57
2019-12-29 05:44:23 s 1 +23667.261 0 +386706.47 6210.0 – C57
2019-12-29 06:14:23 S 08 17 10.433 +78 41 25.94 – V C57
2019-12-29 06:14:23 s 1 +22704.214 0 +387282.73 6930.0 – C57
2019-12-29 06:44:23 S 08 17 00.806 +78 41 53.95 – V C57
2019-12-29 06:44:23 s 1 +21740.589 0 +387850.58 3910.0 – C57
2019-12-29 07:14:23 S 08 16 50.870 +78 42 22.28 – V C57
2019-12-29 07:14:23 s 1 +20776.409 0 +388410.05 7210.0 – C57
2019-12-29 07:44:23 S 08 16 41.160 +78 42 50.11 – V C57
2019-12-29 07:44:23 s 1 +19811.697 0 +388961.13 6870.0 – C57
2019-12-29 08:14:23 S 08 16 31.301 +78 43 18.23 – V C57
2019-12-29 08:14:23 s 1 +18846.475 0 +389503.87 2970.0 – C57
2019-12-29 08:44:23 S 08 16 21.641 +78 43 44.94 – V C57
2019-12-29 08:44:23 s 1 +17880.765 0 +390038.27 5550.0 – C57
2019-12-29 09:14:23 S 08 16 11.753 +78 44 12.66 – V C57
2019-12-29 09:14:23 s 1 +16914.590 0 +390564.36 4670.0 – C57
2019-12-29 09:44:23 S 08 16 01.843 +78 44 40.34 – V C57
2019-12-29 09:44:23 s 1 +15947.972 0 +391082.15 390.0 – C57
2019-12-29 10:14:23 S 08 15 52.044 +78 45 08.39 – V C57
2019-12-29 10:14:23 s 1 +14980.932 0 +391591.67 2770.0 – C57
2019-12-29 10:44:23 S 08 15 42.240 +78 45 35.57 – V C57
2019-12-29 10:44:23 s 1 +14013.493 0 +392092.93 1850.0 – C57
2019-12-29 11:14:23 S 08 15 32.366 +78 46 02.10 – V C57
2019-12-29 11:14:23 s 1 +13045.676 0 +392585.95 7700.0 – C57
2019-12-29 11:44:23 S 08 15 22.279 +78 46 30.00 – V C57
2019-12-29 11:44:23 s 1 +12077.502 0 +393070.75 370.0 – C57
2019-12-29 11:48:19 C 08 13 21.02 +78 38 38.6 – V T08
2019-12-29 11:53:38 C 08 13 19.25 +78 38 43.2 – V T08
2019-12-29 12:01:00 C 08 13 16.79 +78 38 49.5 – V T08
2019-12-29 12:14:23 S 08 15 12.521 +78 46 57.58 – V C57
2019-12-29 12:14:23 s 1 +11108.993 0 +393547.34 9910.0 – C57
2019-12-29 12:17:01 C 08 13 11.48 +78 39 03.0 – V T08
2019-12-29 12:44:23 S 08 15 02.506 +78 47 25.33 – V C57
2019-12-29 12:44:23 s 1 +10140.170 0 +394015.75 6370.0 – C57
2019-12-29 13:14:23 S 08 14 52.697 +78 47 51.00 – 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)