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 13:44:23 S 08 14 42.679 +78 48 18.07 – V C57
2019-12-29 14:14:23 S 08 14 32.594 +78 48 45.90 – V C57
2019-12-29 14:44:23 S 08 14 22.867 +78 49 12.86 – V C57
2019-12-29 15:14:23 S 08 14 12.526 +78 49 40.12 – V C57
2019-12-29 15:44:23 S 08 14 02.638 +78 50 05.86 – V C57
2019-12-29 16:14:23 S 08 13 52.618 +78 50 32.93 – V C57
2019-12-29 16:44:23 S 08 13 42.502 +78 51 00.36 – V C57
2019-12-29 17:14:23 S 08 13 32.693 +78 51 26.32 – V C57
2019-12-29 17:44:23 S 08 13 22.322 +78 51 52.85 – V C57
2019-12-29 18:14:23 S 08 13 12.442 +78 52 19.27 – V C57
2019-12-29 18:44:23 S 08 13 02.311 +78 52 46.60 – V C57
2019-12-29 19:14:23 S 08 12 52.121 +78 53 12.73 – V C57
2019-12-29 19:44:23 S 08 12 42.014 +78 53 37.90 – V C57
2019-12-29 20:14:23 S 08 12 31.877 +78 54 05.15 – V C57
2019-12-29 20:44:23 S 08 12 21.830 +78 54 31.61 – V C57
2019-12-29 21:14:23 S 08 12 11.654 +78 54 57.49 – V C57
2019-12-29 21:44:23 S 08 12 01.354 +78 55 22.84 – V C57
2019-12-29 22:14:23 S 08 11 51.278 +78 55 49.33 – V C57
2019-12-29 22:44:23 S 08 11 41.095 +78 56 15.86 – V C57
2019-12-29 23:14:23 S 08 11 30.857 +78 56 40.92 – V C57
2019-12-29 23:14:23 s 1 -10241.598 0 +401989.77 1440.0 – C57
2019-12-29 23:44:23 S 08 11 20.539 +78 57 06.66 – V C57
2019-12-29 23:44:23 s 1 -11212.235 0 +402282.04 2880.0 – C57
2019-12-30 00:14:23 S 08 11 10.373 +78 57 32.90 – V C57
2019-12-30 00:14:23 s 1 -12182.733 0 +402566.46 2360.0 – C57
2019-12-30 00:44:23 S 08 10 59.969 +78 57 59.26 – V C57
2019-12-30 00:44:23 s 1 -13153.074 0 +402843.04 9920.0 – C57
2019-12-30 01:14:23 S 08 10 49.778 +78 58 23.63 – V C57
2019-12-30 01:14:23 s 1 -14123.238 0 +403111.80 5620.0 – C57
2019-12-30 02:14:23 S 08 10 29.088 +78 59 15.94 – V C57
2019-12-30 02:14:23 s 1 -16062.963 0 +403625.91 1570.0 – C57
2019-12-30 02:44:23 S 08 10 18.950 +78 59 40.78 – V C57
2019-12-30 02:44:23 s 1 -17032.488 0 +403871.27 1920.0 – C57
2019-12-30 03:14:23 S 08 10 08.244 +79 00 06.23 – V C57
2019-12-30 03:14:23 s 1 -18001.763 0 +404108.86 570.0 – C57
2019-12-30 03:44:23 S 08 09 58.159 +79 00 31.57 – V C57
2019-12-30 03:44:23 s 1 -18970.770 0 +404338.69 7570.0 – C57
2019-12-30 04:14:23 S 08 09 47.810 +79 00 57.46 – V C57
2019-12-30 04:14:23 s 1 -19939.492 0 +404560.76 2950.0 – C57
2019-12-30 04:44:23 S 08 09 37.277 +79 01 22.40 – V C57
2019-12-30 04:44:23 s 1 -20907.910 0 +404775.08 6770.0 – C57
2019-12-30 05:14:23 S 08 09 27.060 +79 01 46.67 – V C57
2019-12-30 05:14:23 s 1 -21876.007 0 +404981.68 9060.0 – C57
2019-12-30 05:44:23 S 08 09 16.351 +79 02 13.34 – V C57
2019-12-30 05:44:23 s 1 -22843.763 0 +405180.55 9870.0 – C57
2019-12-30 06:14:23 S 08 09 06.242 +79 02 37.79 – V C57
2019-12-30 06:14:23 s 1 -23811.163 0 +405371.70 9240.0 – C57
2019-12-30 06:44:23 S 08 08 55.738 +79 03 02.09 – V C57
2019-12-30 06:44:23 s 1 -24778.187 0 +405555.16 7210.0 – C57
2019-12-30 07:14:23 S 08 08 45.142 +79 03 27.65 – 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)