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
2019-12-31 08:14:23 S 07 59 46.092 +79 22 55.42 – V C57
2019-12-31 08:14:23 s 1 -73191.683 0 +404878.27 7380.0 – C57
2019-12-31 08:44:23 S 07 59 35.119 +79 23 16.01 – V C57
2019-12-31 08:44:23 s 1 -74115.356 0 +404670.66 5800.0 – C57
2019-12-31 09:14:23 S 07 59 24.089 +79 23 38.11 – V C57
2019-12-31 09:14:23 s 1 -75037.738 0 +404455.63 4810.0 – C57
2019-12-31 09:44:23 S 07 59 12.737 +79 24 00.25 – V C57
2019-12-31 09:44:23 s 1 -75958.812 0 +404233.18 4450.0 – C57
2019-12-31 10:14:23 S 07 59 01.848 +79 24 20.70 – V C57
2019-12-31 10:14:23 s 1 -76878.560 0 +404003.32 4760.0 – C57
2019-12-31 10:44:23 S 07 58 50.573 +79 24 43.27 – V C57
2019-12-31 10:44:23 s 1 -77796.964 0 +403766.05 5780.0 – C57
2019-12-31 11:14:23 S 07 58 39.480 +79 25 03.72 – V C57
2019-12-31 11:14:23 s 1 -78714.007 0 +403521.37 2460.0 – C57
2019-12-31 11:44:23 S 07 58 28.344 +79 25 25.57 – V C57
2019-12-31 11:44:23 s 1 -79629.671 0 +403269.27 9930.0 – C57
2019-12-31 12:14:23 S 07 58 17.206 +79 25 47.28 – V C57
2019-12-31 12:14:23 s 1 -80543.938 0 +403009.76 6590.0 – C57
2019-12-31 12:44:23 S 07 58 05.962 +79 26 07.87 – V C57
2019-12-31 12:44:23 s 1 -81456.790 0 +402742.85 2390.0 – C57
2019-12-31 13:14:23 S 07 57 54.754 +79 26 29.58 – V C57
2019-12-31 13:14:23 s 1 -82368.209 0 +402468.52 7320.0 – C57
2019-12-31 13:44:23 S 07 57 43.680 +79 26 49.74 – V C57
2019-12-31 13:44:23 s 1 -83278.177 0 +402186.78 1320.0 – C57
2019-12-31 14:13:36 C 07 56 26.59 +79 17 28.4 – o D54
2019-12-31 14:14:23 S 07 57 32.338 +79 27 11.30 – V C57
2019-12-31 14:14:23 s 1 -84186.677 0 +401897.63 4370.0 – C57
2019-12-31 14:44:23 S 07 57 21.192 +79 27 32.44 – V C57
2019-12-31 14:44:23 s 1 -85093.689 0 +401601.07 6430.0 – C57
2019-12-31 15:14:23 S 07 57 09.778 +79 27 53.06 – V C57
2019-12-31 15:14:23 s 1 -85999.197 0 +401297.10 7470.0 – C57
2019-12-31 15:44:23 S 07 56 58.745 +79 28 14.34 – V C57
2019-12-31 15:44:23 s 1 -86903.180 0 +400985.71 7440.0 – C57
2019-12-31 16:14:23 S 07 56 47.402 +79 28 33.96 – V C57
2019-12-31 16:14:23 s 1 -87805.622 0 +400666.91 6310.0 – C57
2019-12-31 16:44:23 S 07 56 35.971 +79 28 55.78 – V C57
2019-12-31 16:44:23 s 1 -88706.504 0 +400340.70 4040.0 – C57
2019-12-31 17:14:23 S 07 56 24.931 +79 29 15.83 – V C57
2019-12-31 17:14:23 s 1 -89605.808 0 +400007.08 610.0 – C57
2019-12-31 17:44:23 S 07 56 13.313 +79 29 37.00 – V C57
2019-12-31 17:44:23 s 1 -90503.514 0 +399666.04 5960.0 – C57
2019-12-31 18:14:23 S 07 56 02.210 +79 29 57.41 – V C57
2019-12-31 18:14:23 s 1 -91399.605 0 +399317.58 80.0 – C57
2019-12-31 18:32:03 C 07 54 52.91 +79 20 24.9 – o D54
2019-12-31 18:44:23 S 07 55 50.938 +79 30 17.28 – V C57
2019-12-31 18:44:23 s 1 -92294.061 0 +398961.70 2910.0 – C57
2019-12-31 19:14:23 S 07 55 39.454 +79 30 39.02 – V C57
2019-12-31 19:14:23 s 1 -93186.864 0 +398598.40 4430.0 – C57
2019-12-31 19:44:23 S 07 55 28.346 +79 30 57.74 – V C57
2019-12-31 19:44:23 s 1 -94077.996 0 +398227.68 4600.0 – 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)