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
2020-01-10 05:44:23 S 06 29 16.877 +80 35 02.69 – V C57
2020-01-10 05:44:23 s 1 +101141.84 7 +303624.06 3320.0 – C57
2020-01-10 06:14:23 S 06 29 05.537 +80 35 03.26 – V C57
2020-01-10 06:14:23 s 1 +100301.41 8 +305054.56 4970.0 – C57
2020-01-10 06:44:23 S 06 28 54.156 +80 35 03.88 – V C57
2020-01-10 06:44:23 s 1 +99456.824 0 +306473.32 6580.0 – C57
2020-01-10 07:14:23 S 06 28 42.485 +80 35 04.38 – V C57
2020-01-10 07:14:23 s 1 +98608.136 0 +307880.38 8290.0 – C57
2020-01-10 07:44:23 S 06 28 31.082 +80 35 05.35 – V C57
2020-01-10 07:44:23 s 1 +97755.426 0 +309275.82 240.0 – C57
2020-01-10 08:14:23 S 06 28 19.318 +80 35 06.22 – V C57
2020-01-10 08:14:23 s 1 +96898.762 0 +310659.68 2570.0 – C57
2020-01-10 08:44:23 S 06 28 08.076 +80 35 06.61 – V C57
2020-01-10 08:44:23 s 1 +96038.212 0 +312032.03 5410.0 – C57
2020-01-10 09:14:23 S 06 27 56.808 +80 35 06.86 – V C57
2020-01-10 09:14:23 s 1 +95173.844 0 +313392.92 8880.0 – C57
2020-01-10 09:44:23 S 06 27 45.108 +80 35 07.01 – V C57
2020-01-10 09:44:23 s 1 +94305.724 0 +314742.40 3120.0 – C57
2020-01-10 10:14:23 S 06 27 33.797 +80 35 07.30 – V C57
2020-01-10 10:14:23 s 1 +93433.916 0 +316080.53 8250.0 – C57
2020-01-10 10:44:23 S 06 27 22.020 +80 35 08.05 – V C57
2020-01-10 10:44:23 s 1 +92558.486 0 +317407.37 4390.0 – C57
2020-01-10 11:14:23 S 06 27 10.774 +80 35 08.48 – V C57
2020-01-10 11:14:23 s 1 +91679.495 0 +318722.96 1660.0 – C57
2020-01-10 12:44:23 S 06 26 36.672 +80 35 08.34 – V C57
2020-01-10 12:44:23 s 1 +89021.777 0 +322602.82 1440.0 – C57
2020-01-10 13:14:23 S 06 26 24.869 +80 35 08.34 – V C57
2020-01-10 13:14:23 s 1 +88129.157 0 +323873.96 4390.0 – C57
2020-01-10 13:44:23 S 06 26 13.697 +80 35 08.81 – V C57
2020-01-10 13:44:23 s 1 +87233.277 0 +325134.12 9040.0 – C57
2020-01-10 14:14:23 S 06 26 02.026 +80 35 08.70 – V C57
2020-01-10 14:14:23 s 1 +86334.195 0 +326383.35 5500.0 – C57
2020-01-10 14:44:23 S 06 25 50.798 +80 35 08.66 – V C57
2020-01-10 14:44:23 s 1 +85431.969 0 +327621.68 3860.0 – C57
2020-01-10 15:14:23 S 06 25 39.458 +80 35 08.34 – V C57
2020-01-10 15:14:23 s 1 +84526.653 0 +328849.18 4240.0 – C57
2020-01-10 16:14:23 S 06 25 16.766 +80 35 07.37 – V C57
2020-01-10 16:14:23 s 1 +82706.973 0 +331271.84 1440.0 – C57
2020-01-10 16:44:23 S 06 25 05.023 +80 35 07.22 – V C57
2020-01-10 16:44:23 s 1 +81792.717 0 +332467.11 8450.0 – C57
2020-01-10 17:14:23 S 06 24 53.734 +80 35 06.83 – V C57
2020-01-10 17:14:23 s 1 +80875.587 0 +333651.72 7870.0 – C57
2020-01-10 17:44:23 S 06 24 42.305 +80 35 06.50 – V C57
2020-01-10 17:44:23 s 1 +79955.635 0 +334825.72 9790.0 – C57
2020-01-10 18:14:23 S 06 24 30.919 +80 35 06.18 – V C57
2020-01-10 18:14:23 s 1 +79032.912 0 +335989.17 4300.0 – C57
2020-01-10 18:44:23 S 06 24 19.718 +80 35 05.14 – V C57
2020-01-10 18:44:23 s 1 +78107.470 0 +337142.09 1500.0 – C57
2020-01-10 19:14:23 S 06 24 08.316 +80 35 04.56 – V C57
2020-01-10 19:14:23 s 1 +77179.357 0 +338284.54 1470.0 – 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)