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
2020-01-18 05:44:23 S 05 28 24.221 +79 45 09.29 – V C57
2020-01-18 05:44:23 s 1 -212498.61 1 +216593.20 9170.0 – C57
2020-01-18 06:14:23 S 05 28 17.206 +79 44 54.31 – V C57
2020-01-18 06:14:23 s 1 -212608.50 9 +214796.34 3480.0 – C57
2020-01-18 06:44:23 S 05 28 10.771 +79 44 40.02 – V C57
2020-01-18 06:44:23 s 1 -212708.50 7 +212989.57 5710.0 – C57
2020-01-18 07:14:23 S 05 28 03.991 +79 44 25.19 – V C57
2020-01-18 07:14:23 s 1 -212798.48 2 +211172.86 5700.0 – C57
2020-01-18 07:44:23 S 05 27 57.329 +79 44 10.43 – V C57
2020-01-18 07:44:23 s 1 -212878.30 8 +209346.18 3260.0 – C57
2020-01-18 08:14:23 S 05 27 50.885 +79 43 56.46 – V C57
2020-01-18 08:14:23 s 1 -212947.86 0 +207509.50 8200.0 – C57
2020-01-18 08:44:23 S 05 27 44.066 +79 43 41.45 – V C57
2020-01-18 08:44:23 s 1 -213007.00 7 +205662.77 340.0 – C57
2020-01-18 09:14:23 S 05 27 37.505 +79 43 27.05 – V C57
2020-01-18 09:14:23 s 1 -213055.61 7 +203805.96 9490.0 – C57
2020-01-18 09:44:23 S 05 27 30.828 +79 43 12.14 – V C57
2020-01-18 09:44:23 s 1 -213093.55 6 +201939.05 5450.0 – C57
2020-01-18 10:14:23 S 05 27 24.113 +79 42 57.64 – V C57
2020-01-18 10:14:23 s 1 -213120.68 5 +200061.98 8020.0 – C57
2020-01-18 10:44:23 S 05 27 17.702 +79 42 42.66 – V C57
2020-01-18 10:44:23 s 1 -213136.86 5 +198174.73 7000.0 – C57
2020-01-18 11:14:23 S 05 27 11.182 +79 42 27.90 – V C57
2020-01-18 11:14:23 s 1 -213141.95 2 +196277.26 2190.0 – C57
2020-01-18 11:44:23 S 05 27 04.759 +79 42 12.67 – V C57
2020-01-18 11:44:23 s 1 -213135.80 2 +194369.53 3360.0 – C57
2020-01-18 12:14:23 S 05 26 58.217 +79 41 57.95 – V C57
2020-01-18 12:14:23 s 1 -213118.26 4 +192451.51 310.0 – C57
2020-01-18 12:44:23 S 05 26 51.614 +79 41 43.37 – V C57
2020-01-18 12:44:23 s 1 -213089.18 7 +190523.17 2810.0 – C57
2020-01-18 13:14:23 S 05 26 45.122 +79 41 28.21 – V C57
2020-01-18 13:14:23 s 1 -213048.41 6 +188584.46 630.0 – C57
2020-01-18 13:44:23 S 05 26 38.786 +79 41 13.78 – V C57
2020-01-18 13:44:23 s 1 -212995.79 2 +186635.34 3550.0 – C57
2020-01-18 14:14:23 S 05 26 32.213 +79 40 58.80 – V C57
2020-01-18 14:14:23 s 1 -212931.15 5 +184675.80 1320.0 – C57
2020-01-18 14:44:23 S 05 26 25.908 +79 40 43.75 – V C57
2020-01-18 14:44:23 s 1 -212854.33 8 +182705.77 3720.0 – C57
2020-01-18 15:14:23 S 05 26 19.483 +79 40 28.70 – V C57
2020-01-18 15:14:23 s 1 -212765.17 4 +180725.24 480.0 – C57
2020-01-18 15:44:23 S 05 26 13.013 +79 40 13.19 – V C57
2020-01-18 15:44:23 s 1 -212663.49 1 +178734.16 1370.0 – C57
2020-01-18 16:14:23 S 05 26 06.830 +79 39 58.86 – V C57
2020-01-18 16:14:23 s 1 -212549.11 1 +176732.49 6110.0 – C57
2020-01-18 16:44:23 S 05 26 00.269 +79 39 43.09 – V C57
2020-01-18 16:44:23 s 1 -212421.85 6 +174720.21 4450.0 – C57
2020-01-18 17:14:23 S 05 25 54.132 +79 39 28.26 – V C57
2020-01-18 17:14:23 s 1 -212281.54 2 +172697.27 6110.0 – C57
2020-01-18 17:44:23 S 05 25 47.914 +79 39 13.97 – V C57
2020-01-18 17:44:23 s 1 -212127.98 2 +170663.64 820.0 – 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)