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
2019-06-24 15:14:30 s 1 +13624.596 0 +389344.12 9330.0 – C57
2019-06-24 15:44:30 S 06 43 44.719 -79 10 31.04 – V C57
2019-06-24 15:44:30 s 1 +12598.240 0 +389839.03 8030.0 – C57
2019-06-24 16:14:30 S 06 43 48.617 -79 08 40.02 – V C57
2019-06-24 16:14:30 s 1 +11571.541 0 +390325.62 9080.0 – C57
2019-06-24 16:44:30 S 06 43 51.766 -79 06 58.39 – V C57
2019-06-24 16:44:30 s 1 +10544.523 0 +390803.92 2570.0 – C57
2019-06-24 17:14:30 S 06 43 55.630 -79 05 05.50 – V C57
2019-06-24 17:44:30 S 06 43 59.170 -79 03 19.15 – V C57
2019-06-24 18:14:30 S 06 44 02.652 -79 01 27.91 – V C57
2019-06-24 18:44:30 S 06 44 06.367 -78 59 41.53 – V C57
2019-06-24 20:14:30 S 06 44 17.134 -78 54 17.28 – V C57
2019-06-24 20:44:30 S 06 44 20.645 -78 52 20.06 – V C57
2019-06-24 21:14:30 S 06 44 23.923 -78 50 40.16 – V C57
2019-06-24 21:44:30 S 06 44 27.667 -78 48 44.71 – V C57
2019-06-24 22:14:30 S 06 44 30.607 -78 47 04.49 – V C57
2019-06-24 22:44:30 S 06 44 34.099 -78 45 16.60 – V C57
2019-06-24 23:14:30 S 06 44 37.579 -78 43 25.82 – V C57
2019-06-24 23:44:30 S 06 44 40.498 -78 41 45.71 – V C57
2019-06-25 00:14:30 S 06 44 44.136 -78 39 51.73 – V C57
2019-06-25 00:44:30 S 06 44 47.299 -78 38 09.46 – V C57
2019-06-25 01:14:30 S 06 44 50.292 -78 36 24.52 – V C57
2019-06-25 01:44:30 S 06 44 53.861 -78 34 33.82 – V C57
2019-06-25 02:14:30 S 06 44 57.084 -78 32 43.30 – V C57
2019-06-25 02:44:30 S 06 45 00.283 -78 30 52.56 – V C57
2019-06-25 02:44:30 s 1 -10028.638 0 +398649.82 6100.0 – C57
2019-06-25 03:14:30 S 06 45 03.557 -78 29 07.84 – V C57
2019-06-25 03:14:30 s 1 -11057.279 0 +398957.18 3140.0 – C57
2019-06-25 03:44:30 S 06 45 06.566 -78 27 22.82 – V C57
2019-06-25 03:44:30 s 1 -12085.766 0 +399256.54 4670.0 – C57
2019-06-25 04:14:30 S 06 45 09.749 -78 25 32.95 – V C57
2019-06-25 04:14:30 s 1 -13114.077 0 +399547.93 790.0 – C57
2019-06-25 04:44:30 S 06 45 13.159 -78 23 41.57 – V C57
2019-06-25 04:44:30 s 1 -14142.193 0 +399831.34 1590.0 – C57
2019-06-25 05:14:30 S 06 45 15.902 -78 22 01.67 – V C57
2019-06-25 05:14:30 s 1 -15170.093 0 +400106.79 7140.0 – C57
2019-06-25 05:44:30 S 06 45 19.253 -78 20 08.38 – V C57
2019-06-25 05:44:30 s 1 -16197.757 0 +400374.29 7540.0 – C57
2019-06-25 06:14:30 S 06 45 22.241 -78 18 29.81 – V C57
2019-06-25 06:14:30 s 1 -17225.165 0 +400633.85 2880.0 – C57
2019-06-25 06:44:30 S 06 45 25.234 -78 16 35.26 – V C57
2019-06-25 06:44:30 s 1 -18252.297 0 +400885.49 3220.0 – C57
2019-06-25 07:14:30 S 06 45 28.243 -78 14 54.24 – V C57
2019-06-25 07:14:30 s 1 -19279.133 0 +401129.21 8670.0 – C57
2019-06-25 07:44:30 S 06 45 31.500 -78 13 03.29 – V C57
2019-06-25 07:44:30 s 1 -20305.654 0 +401365.02 9290.0 – C57
2019-06-25 08:14:30 S 06 45 34.205 -78 11 19.90 – V C57
2019-06-25 08:14:30 s 1 -21331.839 0 +401592.94 5190.0 – C57
2019-06-25 08:44:30 S 06 45 37.567 -78 09 24.77 – V C57
2019-06-25 08:44:30 s 1 -22357.669 0 +401812.98 6430.0 – 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)