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
2019-06-23 10:14:30 s 1 +71682.950 0 +345742.31 8050.0 – C57
2019-06-23 10:44:30 S 06 39 27.775 -80 55 45.23 – V C57
2019-06-23 10:44:30 s 1 +70722.669 0 +346755.03 7920.0 – C57
2019-06-23 11:14:30 S 06 39 33.403 -80 53 50.14 – V C57
2019-06-23 11:14:30 s 1 +69760.328 0 +347758.07 2380.0 – C57
2019-06-23 11:44:30 S 06 39 38.974 -80 52 00.59 – V C57
2019-06-23 11:44:30 s 1 +68795.965 0 +348751.49 1620.0 – C57
2019-06-23 13:44:30 S 06 39 59.400 -80 44 43.94 – V C57
2019-06-23 13:44:30 s 1 +64919.064 0 +352629.41 9760.0 – C57
2019-06-23 14:14:30 S 06 40 04.685 -80 42 57.53 – V C57
2019-06-23 14:14:30 s 1 +63945.164 0 +353575.11 5450.0 – C57
2019-06-23 14:44:30 S 06 40 09.938 -80 41 06.07 – V C57
2019-06-23 14:44:30 s 1 +62969.467 0 +354511.36 6930.0 – C57
2019-06-23 15:14:30 S 06 40 14.654 -80 39 19.80 – V C57
2019-06-23 15:14:30 s 1 +61992.010 0 +355438.19 4380.0 – C57
2019-06-23 15:44:30 S 06 40 19.992 -80 37 28.78 – V C57
2019-06-23 15:44:30 s 1 +61012.828 0 +356355.62 7950.0 – C57
2019-06-23 16:14:30 S 06 40 24.864 -80 35 39.73 – V C57
2019-06-23 16:14:30 s 1 +60031.956 0 +357263.69 7800.0 – C57
2019-06-23 16:44:30 S 06 40 29.765 -80 33 48.64 – V C57
2019-06-23 16:44:30 s 1 +59049.429 0 +358162.42 4100.0 – C57
2019-06-23 17:14:30 S 06 40 34.874 -80 32 02.72 – V C57
2019-06-23 17:14:30 s 1 +58065.281 0 +359051.85 6990.0 – C57
2019-06-23 18:14:30 S 06 40 44.424 -80 28 21.83 – V C57
2019-06-23 18:14:30 s 1 +56092.260 0 +360802.88 3200.0 – C57
2019-06-23 18:44:30 S 06 40 49.649 -80 26 29.65 – V C57
2019-06-23 18:44:30 s 1 +55103.454 0 +361664.54 6810.0 – C57
2019-06-23 19:44:30 S 06 40 58.762 -80 22 52.82 – V C57
2019-06-23 19:44:30 s 1 +53121.415 0 +363360.29 5820.0 – C57
2019-06-23 20:14:30 S 06 41 03.626 -80 21 06.70 – V C57
2019-06-23 20:14:30 s 1 +52128.247 0 +364194.43 1500.0 – C57
2019-06-23 20:44:30 S 06 41 08.419 -80 19 09.16 – V C57
2019-06-23 20:44:30 s 1 +51133.689 0 +365019.45 4830.0 – C57
2019-06-23 21:44:30 S 06 41 17.858 -80 15 31.64 – V C57
2019-06-23 21:44:30 s 1 +49140.531 0 +366642.23 5020.0 – C57
2019-06-23 22:14:30 S 06 41 21.838 -80 13 49.62 – V C57
2019-06-23 22:14:30 s 1 +48141.994 0 +367440.04 2160.0 – C57
2019-06-23 22:44:30 S 06 41 26.450 -80 12 02.30 – V C57
2019-06-23 22:44:30 s 1 +47142.191 0 +368228.82 7510.0 – C57
2019-06-23 23:14:30 S 06 41 31.421 -80 10 07.68 – V C57
2019-06-23 23:14:30 s 1 +46141.155 0 +369008.62 1220.0 – C57
2019-06-23 23:44:30 S 06 41 35.762 -80 08 18.46 – V C57
2019-06-23 23:44:30 s 1 +45138.914 0 +369779.43 3410.0 – C57
2019-06-24 00:14:30 S 06 41 40.210 -80 06 31.07 – V C57
2019-06-24 00:14:30 s 1 +44135.498 0 +370541.30 4230.0 – C57
2019-06-24 00:44:30 S 06 41 44.683 -80 04 39.54 – V C57
2019-06-24 00:44:30 s 1 +43130.938 0 +371294.25 3810.0 – C57
2019-06-24 02:14:30 S 06 41 57.658 -79 59 17.02 – V C57
2019-06-24 02:14:30 s 1 +40110.679 0 +373499.77 6420.0 – C57
2019-06-24 02:44:30 S 06 42 01.735 -79 57 31.07 – 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)