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 00:44:23 s 1 +77626.582 0 +338031.63 3170.0 – C57
2019-12-28 01:14:23 S 08 26 09.060 +78 12 46.15 – V C57
2019-12-28 01:14:23 s 1 +76744.994 0 +339141.61 6320.0 – C57
2019-12-28 01:44:23 S 08 26 00.134 +78 13 17.40 – V C57
2019-12-28 01:44:23 s 1 +75861.010 0 +340241.42 940.0 – C57
2019-12-28 02:14:23 S 08 25 51.190 +78 13 48.90 – V C57
2019-12-28 02:14:23 s 1 +74974.673 0 +341331.09 7160.0 – C57
2019-12-28 02:44:23 S 08 25 42.665 +78 14 19.54 – V C57
2019-12-28 02:44:23 s 1 +74086.027 0 +342410.67 5080.0 – C57
2019-12-28 03:14:23 S 08 25 33.502 +78 14 51.61 – V C57
2019-12-28 03:14:23 s 1 +73195.113 0 +343480.19 4810.0 – C57
2019-12-28 03:44:23 S 08 25 24.722 +78 15 22.07 – V C57
2019-12-28 03:44:23 s 1 +72301.974 0 +344539.71 6480.0 – C57
2019-12-28 04:14:23 S 08 25 15.792 +78 15 53.60 – V C57
2019-12-28 04:14:23 s 1 +71406.651 0 +345589.26 180.0 – C57
2019-12-28 04:44:23 S 08 25 06.833 +78 16 25.07 – V C57
2019-12-28 04:44:23 s 1 +70509.184 0 +346628.88 6030.0 – C57
2019-12-28 05:14:23 S 08 24 58.082 +78 16 55.67 – V C57
2019-12-28 05:14:23 s 1 +69609.613 0 +347658.61 4130.0 – C57
2019-12-28 05:44:23 S 08 24 48.761 +78 17 27.38 – V C57
2019-12-28 05:44:23 s 1 +68707.979 0 +348678.50 4590.0 – C57
2019-12-28 06:14:23 S 08 24 39.960 +78 17 57.52 – V C57
2019-12-28 06:14:23 s 1 +67804.319 0 +349688.57 7510.0 – C57
2019-12-28 06:44:23 S 08 24 31.010 +78 18 28.12 – V C57
2019-12-28 06:44:23 s 1 +66898.673 0 +350688.87 2990.0 – C57
2019-12-28 07:14:23 S 08 24 22.010 +78 18 58.61 – V C57
2019-12-28 07:14:23 s 1 +65991.078 0 +351679.44 1130.0 – C57
2019-12-28 07:44:23 S 08 24 13.200 +78 19 28.24 – V C57
2019-12-28 07:44:23 s 1 +65081.572 0 +352660.30 2030.0 – C57
2019-12-28 08:14:23 S 08 24 03.876 +78 19 59.56 – V C57
2019-12-28 08:14:23 s 1 +64170.191 0 +353631.51 5800.0 – C57
2019-12-28 08:44:23 S 08 23 54.898 +78 20 30.01 – V C57
2019-12-28 08:44:23 s 1 +63256.973 0 +354593.09 2520.0 – C57
2019-12-28 09:14:23 S 08 23 45.826 +78 21 01.01 – V C57
2019-12-28 09:14:23 s 1 +62341.954 0 +355545.09 2300.0 – C57
2019-12-28 09:44:23 S 08 23 36.775 +78 21 31.28 – V C57
2019-12-28 09:44:23 s 1 +61425.168 0 +356487.53 5220.0 – C57
2019-12-28 10:14:23 S 08 23 27.468 +78 22 02.21 – V C57
2019-12-28 10:14:23 s 1 +60506.651 0 +357420.45 1380.0 – C57
2019-12-28 10:44:23 S 08 23 18.533 +78 22 31.87 – V C57
2019-12-28 10:44:23 s 1 +59586.439 0 +358343.88 880.0 – C57
2019-12-28 11:14:23 S 08 23 09.468 +78 23 01.79 – V C57
2019-12-28 11:14:23 s 1 +58664.564 0 +359257.87 3800.0 – C57
2019-12-28 11:44:23 S 08 23 00.211 +78 23 31.92 – V C57
2019-12-28 11:44:23 s 1 +57741.061 0 +360162.44 230.0 – C57
2019-12-28 12:14:23 S 08 22 51.132 +78 24 01.40 – V C57
2019-12-28 12:14:23 s 1 +56815.964 0 +361057.62 260.0 – C57
2019-12-28 12:44:23 S 08 22 41.736 +78 24 32.44 – V C57
2019-12-28 12:44:23 s 1 +55889.305 0 +361943.46 3980.0 – C57
2019-12-28 13:14:23 S 08 22 32.724 +78 25 02.14 – 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)