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
2019-06-24 02:44:30 s 1 +39101.829 0 +374217.24 2340.0 – C57
2019-06-24 03:14:30 S 06 42 06.449 -79 55 37.96 – V C57
2019-06-24 03:14:30 s 1 +38091.978 0 +374925.91 7670.0 – C57
2019-06-24 03:44:30 S 06 42 10.373 -79 53 50.50 – V C57
2019-06-24 03:44:30 s 1 +37081.154 0 +375625.78 2540.0 – C57
2019-06-24 04:14:30 S 06 42 14.582 -79 52 01.70 – V C57
2019-06-24 04:14:30 s 1 +36069.384 0 +376316.89 7060.0 – C57
2019-06-24 04:44:30 S 06 42 18.895 -79 50 17.05 – V C57
2019-06-24 04:44:30 s 1 +35056.697 0 +376999.26 1370.0 – C57
2019-06-24 05:14:30 S 06 42 23.023 -79 48 25.92 – V C57
2019-06-24 05:14:30 s 1 +34043.119 0 +377672.89 5580.0 – C57
2019-06-24 05:44:30 S 06 42 27.132 -79 46 37.99 – V C57
2019-06-24 05:44:30 s 1 +33028.677 0 +378337.83 9820.0 – C57
2019-06-24 06:14:30 S 06 42 31.685 -79 44 43.87 – V C57
2019-06-24 06:14:30 s 1 +32013.399 0 +378994.08 4210.0 – C57
2019-06-24 06:44:30 S 06 42 35.251 -79 43 00.59 – V C57
2019-06-24 06:44:30 s 1 +30997.310 0 +379641.67 8860.0 – C57
2019-06-24 07:14:30 S 06 42 39.494 -79 41 08.48 – V C57
2019-06-24 07:14:30 s 1 +29980.437 0 +380280.62 3900.0 – C57
2019-06-24 07:44:30 S 06 42 43.490 -79 39 24.12 – V C57
2019-06-24 07:44:30 s 1 +28962.807 0 +380910.95 9430.0 – C57
2019-06-24 08:14:30 S 06 42 47.330 -79 37 34.21 – V C57
2019-06-24 08:14:30 s 1 +27944.445 0 +381532.67 5590.0 – C57
2019-06-24 08:44:30 S 06 42 51.614 -79 35 42.32 – V C57
2019-06-24 08:44:30 s 1 +26925.376 0 +382145.81 2480.0 – C57
2019-06-24 09:14:30 S 06 42 55.668 -79 33 52.24 – V C57
2019-06-24 09:14:30 s 1 +25905.627 0 +382750.39 210.0 – C57
2019-06-24 09:44:30 S 06 42 59.314 -79 32 07.22 – V C57
2019-06-24 09:44:30 s 1 +24885.223 0 +383346.42 8910.0 – C57
2019-06-24 10:14:30 S 06 43 03.360 -79 30 22.68 – V C57
2019-06-24 10:14:30 s 1 +23864.189 0 +383933.93 8680.0 – C57
2019-06-24 10:44:30 S 06 43 07.099 -79 28 34.79 – V C57
2019-06-24 10:44:30 s 1 +22842.550 0 +384512.93 9630.0 – C57
2019-06-24 11:14:30 S 06 43 10.922 -79 26 42.68 – V C57
2019-06-24 11:14:30 s 1 +21820.330 0 +385083.45 1870.0 – C57
2019-06-24 11:44:30 S 06 43 15.077 -79 24 53.21 – V C57
2019-06-24 11:44:30 s 1 +20797.555 0 +385645.49 5520.0 – C57
2019-06-24 12:14:30 S 06 43 18.703 -79 23 06.86 – V C57
2019-06-24 12:14:30 s 1 +19774.249 0 +386199.08 680.0 – C57
2019-06-24 12:44:30 S 06 43 22.459 -79 21 16.60 – V C57
2019-06-24 12:44:30 s 1 +18750.435 0 +386744.24 7450.0 – C57
2019-06-24 13:14:30 S 06 43 26.138 -79 19 37.99 – V C57
2019-06-24 13:14:30 s 1 +17726.138 0 +387280.98 5960.0 – C57
2019-06-24 13:44:30 S 06 43 30.142 -79 17 37.25 – V C57
2019-06-24 13:44:30 s 1 +16701.382 0 +387809.32 6290.0 – C57
2019-06-24 14:14:30 S 06 43 33.636 -79 15 54.54 – V C57
2019-06-24 14:14:30 s 1 +15676.191 0 +388329.28 8560.0 – C57
2019-06-24 14:44:30 S 06 43 37.644 -79 14 02.72 – V C57
2019-06-24 14:44:30 s 1 +14650.588 0 +388840.87 2870.0 – C57
2019-06-24 15:14:30 S 06 43 41.047 -79 12 17.71 – 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)