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
2019-12-28 13:14:23 s 1 +54961.118 0 +362819.97 1470.0 – C57
2019-12-28 13:44:23 S 08 22 23.501 +78 25 32.12 – V C57
2019-12-28 13:44:23 s 1 +54031.434 0 +363687.20 2830.0 – C57
2019-12-28 14:14:23 S 08 22 14.146 +78 26 02.54 – V C57
2019-12-28 14:14:23 s 1 +53100.285 0 +364545.18 8130.0 – C57
2019-12-28 14:44:23 S 08 22 04.937 +78 26 31.85 – V C57
2019-12-28 14:44:23 s 1 +52167.703 0 +365393.93 7450.0 – C57
2019-12-28 15:14:23 S 08 21 55.459 +78 27 02.02 – V C57
2019-12-28 15:14:23 s 1 +51233.719 0 +366233.48 890.0 – C57
2019-12-28 15:44:23 S 08 21 46.486 +78 27 30.67 – V C57
2019-12-28 15:44:23 s 1 +50298.365 0 +367063.88 8510.0 – C57
2019-12-28 16:14:23 S 08 21 37.284 +78 28 00.37 – V C57
2019-12-28 16:14:23 s 1 +49361.669 0 +367885.14 410.0 – C57
2019-12-28 16:44:23 S 08 21 27.770 +78 28 30.54 – V C57
2019-12-28 16:44:23 s 1 +48423.663 0 +368697.29 6660.0 – C57
2019-12-28 17:14:23 S 08 21 18.547 +78 29 00.02 – V C57
2019-12-28 17:14:23 s 1 +47484.377 0 +369500.38 7340.0 – C57
2019-12-28 17:44:23 S 08 21 08.918 +78 29 30.44 – V C57
2019-12-28 17:44:23 s 1 +46543.840 0 +370294.41 2520.0 – C57
2019-12-28 18:14:23 S 08 20 59.762 +78 29 59.21 – V C57
2019-12-28 18:14:23 s 1 +45602.080 0 +371079.43 2290.0 – C57
2019-12-28 18:44:23 S 08 20 50.287 +78 30 27.86 – V C57
2019-12-28 18:44:23 s 1 +44659.128 0 +371855.46 6710.0 – C57
2019-12-28 19:14:23 S 08 20 40.836 +78 30 57.10 – V C57
2019-12-28 19:14:23 s 1 +43715.011 0 +372622.53 5870.0 – C57
2019-12-28 19:44:23 S 08 20 31.706 +78 31 26.04 – V C57
2019-12-28 19:44:23 s 1 +42769.758 0 +373380.67 9840.0 – C57
2019-12-28 20:14:23 S 08 20 22.171 +78 31 55.92 – V C57
2019-12-28 20:14:23 s 1 +41823.397 0 +374129.90 8690.0 – C57
2019-12-28 20:44:23 S 08 20 12.691 +78 32 25.12 – V C57
2019-12-28 20:44:23 s 1 +40875.955 0 +374870.24 2490.0 – C57
2019-12-28 21:14:23 S 08 20 03.180 +78 32 54.49 – V C57
2019-12-28 21:14:23 s 1 +39927.461 0 +375601.74 1320.0 – C57
2019-12-28 21:44:23 S 08 19 53.722 +78 33 22.97 – V C57
2019-12-28 21:44:23 s 1 +38977.940 0 +376324.40 5240.0 – C57
2019-12-28 22:14:23 S 08 19 44.402 +78 33 51.59 – V C57
2019-12-28 22:14:23 s 1 +38027.420 0 +377038.27 4330.0 – C57
2019-12-28 22:44:23 S 08 19 34.956 +78 34 20.10 – V C57
2019-12-28 22:44:23 s 1 +37075.928 0 +377743.36 8660.0 – C57
2019-12-28 23:14:23 S 08 19 25.255 +78 34 49.08 – V C57
2019-12-28 23:14:23 s 1 +36123.490 0 +378439.69 8290.0 – C57
2019-12-28 23:44:23 S 08 19 15.638 +78 35 18.64 – V C57
2019-12-28 23:44:23 s 1 +35170.132 0 +379127.30 3300.0 – C57
2019-12-29 00:14:23 S 08 19 06.218 +78 35 47.15 – V C57
2019-12-29 00:14:23 s 1 +34215.880 0 +379806.21 3740.0 – C57
2019-12-29 00:44:23 S 08 18 56.590 +78 36 15.55 – V C57
2019-12-29 00:44:23 s 1 +33260.759 0 +380476.43 9690.0 – C57
2019-12-29 01:14:23 S 08 18 47.057 +78 36 43.16 – V C57
2019-12-29 01:14:23 s 1 +32304.795 0 +381138.01 1210.0 – C57
2019-12-29 01:44:23 S 08 18 37.514 +78 37 11.82 – 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)