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
2019-06-29 20:44:30 s 1 -200590.80 7 +269078.71 8390.0 C57
2019-06-29 21:44:30 S 06 52 48.761 -71 53 24.29 V C57
2019-06-29 21:44:30 s 1 -201413.11 7 +266098.38 3440.0 C57
2019-06-29 22:14:30 S 06 52 50.167 -71 51 46.15 V C57
2019-06-29 22:14:30 s 1 -201814.12 0 +264594.80 9290.0 C57
2019-06-29 22:44:30 S 06 52 51.528 -71 50 02.36 V C57
2019-06-29 22:44:30 s 1 -202208.26 4 +263082.25 7060.0 C57
2019-06-29 23:14:30 S 06 52 53.114 -71 48 23.29 V C57
2019-06-29 23:14:30 s 1 -202595.47 9 +261560.70 6500.0 C57
2019-06-30 00:14:30 S 06 52 55.944 -71 45 06.01 V C57
2019-06-30 00:14:30 s 1 -203348.84 0 +258490.56 9470.0 C57
2019-06-30 00:44:30 S 06 52 57.247 -71 43 28.67 V C57
2019-06-30 00:44:30 s 1 -203714.84 2 +256941.91 2510.0 C57
2019-06-30 01:14:30 S 06 52 58.567 -71 41 46.68 V C57
2019-06-30 01:14:30 s 1 -204073.62 8 +255384.19 6250.0 C57
2019-06-30 01:44:30 S 06 53 00.175 -71 40 04.19 V C57
2019-06-30 01:44:30 s 1 -204425.12 2 +253817.36 450.0 C57
2019-06-30 02:14:30 S 06 53 01.495 -71 38 25.98 V C57
2019-06-30 02:14:30 s 1 -204769.24 9 +252241.42 4830.0 C57
2019-06-30 02:44:30 S 06 53 02.964 -71 36 49.86 V C57
2019-06-30 02:44:30 s 1 -205105.93 3 +250656.33 9160.0 C57
2019-06-30 03:14:30 S 06 53 04.471 -71 35 03.26 V C57
2019-06-30 03:14:30 s 1 -205435.09 5 +249062.07 3150.0 C57
2019-06-30 03:44:30 S 06 53 05.628 -71 33 31.97 V C57
2019-06-30 03:44:30 s 1 -205756.65 7 +247458.62 6540.0 C57
2019-06-30 04:14:30 S 06 53 07.334 -71 31 46.81 V C57
2019-06-30 04:14:30 s 1 -206070.53 7 +245845.96 9060.0 C57
2019-06-30 04:44:30 S 06 53 08.551 -71 30 10.22 V C57
2019-06-30 04:44:30 s 1 -206376.65 5 +244224.07 420.0 C57
2019-06-30 05:14:30 S 06 53 10.109 -71 28 28.38 V C57
2019-06-30 05:14:30 s 1 -206674.92 7 +242592.92 360.0 C57
2019-06-30 05:44:30 S 06 53 11.501 -71 26 48.48 V C57
2019-06-30 05:44:30 s 1 -206965.27 1 +240952.48 8580.0 C57
2019-06-30 06:14:30 S 06 53 12.694 -71 25 15.92 V C57
2019-06-30 06:14:30 s 1 -207247.60 0 +239302.75 4790.0 C57
2019-06-30 06:44:30 S 06 53 14.338 -71 23 30.41 V C57
2019-06-30 06:44:30 s 1 -207521.82 7 +237643.68 8700.0 C57
2019-06-30 07:14:30 S 06 53 15.576 -71 21 55.69 V C57
2019-06-30 07:14:30 s 1 -207787.86 6 +235975.27 0.0 C57
2019-06-30 07:44:30 S 06 53 17.167 -71 20 12.59 V C57
2019-06-30 07:44:30 s 1 -208045.62 7 +234297.48 8390.0 C57
2019-06-30 08:14:30 S 06 53 18.514 -71 18 33.01 V C57
2019-06-30 08:14:30 s 1 -208295.01 8 +232610.29 3560.0 C57
2019-06-30 08:44:30 S 06 53 19.774 -71 16 59.63 V C57
2019-06-30 08:44:30 s 1 -208535.94 8 +230913.68 5190.0 C57
2019-06-30 10:14:30 S 06 53 24.187 -71 11 56.94 V C57
2019-06-30 10:14:30 s 1 -209207.02 5 +225767.09 5630.0 C57
2019-06-30 10:44:30 S 06 53 25.514 -71 10 18.91 V C57
2019-06-30 10:44:30 s 1 -209413.15 8 +224032.55 9850.0 C57
2019-06-30 11:14:30 S 06 53 26.911 -71 08 37.03 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)