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
2020-01-16 00:44:23 S 05 41 52.529 +80 08 06.79 – V C57
2020-01-16 00:44:23 s 1 -161468.94 9 +356499.95 2210.0 – C57
2020-01-16 02:14:23 S 05 41 26.218 +80 07 30.29 – V C57
2020-01-16 02:14:23 s 1 -163681.06 6 +353805.70 3760.0 – C57
2020-01-16 02:44:23 S 05 41 17.854 +80 07 19.34 – V C57
2020-01-16 02:44:23 s 1 -164411.26 8 +352892.26 1510.0 – C57
2020-01-16 03:14:23 S 05 41 09.686 +80 07 08.33 – V C57
2020-01-16 03:14:23 s 1 -165137.83 6 +351971.13 6130.0 – C57
2020-01-16 03:44:23 S 05 41 01.039 +80 06 56.52 – V C57
2020-01-16 03:44:23 s 1 -165860.73 8 +351042.29 7590.0 – C57
2020-01-16 04:14:23 S 05 40 52.918 +80 06 45.18 – V C57
2020-01-16 04:14:23 s 1 -166579.94 2 +350105.74 5820.0 – C57
2020-01-16 04:44:23 S 05 40 44.539 +80 06 33.52 – V C57
2020-01-16 04:44:23 s 1 -167295.41 9 +349161.47 800.0 – C57
2020-01-16 05:14:23 S 05 40 36.043 +80 06 21.78 – V C57
2020-01-16 05:14:23 s 1 -168007.13 6 +348209.45 2470.0 – C57
2020-01-16 05:44:23 S 05 40 27.960 +80 06 10.19 – V C57
2020-01-16 05:44:23 s 1 -168715.06 1 +347249.70 790.0 – C57
2020-01-16 06:14:23 S 05 40 19.426 +80 05 58.16 – V C57
2020-01-16 06:14:23 s 1 -169419.16 3 +346282.18 5710.0 – C57
2020-01-16 06:44:23 S 05 40 11.294 +80 05 46.68 – V C57
2020-01-16 06:44:23 s 1 -170119.40 9 +345306.89 7180.0 – C57
2020-01-16 07:14:23 S 05 40 02.887 +80 05 34.87 – V C57
2020-01-16 07:14:23 s 1 -170815.76 6 +344323.82 5150.0 – C57
2020-01-16 07:44:23 S 05 39 54.648 +80 05 23.21 – V C57
2020-01-16 07:44:23 s 1 -171508.20 1 +343332.95 9590.0 – C57
2020-01-16 08:14:23 S 05 39 46.541 +80 05 11.44 – V C57
2020-01-16 08:14:23 s 1 -172196.68 0 +342334.28 430.0 – C57
2020-01-16 08:44:23 S 05 39 38.311 +80 04 59.30 – V C57
2020-01-16 08:44:23 s 1 -172881.17 0 +341327.79 7630.0 – C57
2020-01-16 09:14:23 S 05 39 30.134 +80 04 47.42 – V C57
2020-01-16 09:14:23 s 1 -173561.63 8 +340313.48 1150.0 – C57
2020-01-16 09:44:23 S 05 39 21.737 +80 04 35.51 – V C57
2020-01-16 09:44:23 s 1 -174238.04 7 +339291.32 930.0 – C57
2020-01-16 10:14:23 S 05 39 13.694 +80 04 23.84 – V C57
2020-01-16 10:14:23 s 1 -174910.36 4 +338261.30 6920.0 – C57
2020-01-16 10:44:23 S 05 39 05.465 +80 04 12.04 – V C57
2020-01-16 10:44:23 s 1 -175578.55 4 +337223.41 9070.0 – C57
2020-01-16 11:14:23 S 05 38 57.288 +80 03 59.54 – V C57
2020-01-16 11:14:23 s 1 -176242.58 1 +336177.65 7330.0 – C57
2020-01-16 11:44:23 S 05 38 49.265 +80 03 47.92 – V C57
2020-01-16 11:44:23 s 1 -176902.40 9 +335123.99 1640.0 – C57
2020-01-16 12:14:23 S 05 38 41.107 +80 03 35.10 – V C57
2020-01-16 12:14:23 s 1 -177558.00 2 +334062.42 1970.0 – C57
2020-01-16 12:44:23 S 05 38 33.185 +80 03 23.54 – V C57
2020-01-16 12:44:23 s 1 -178209.32 3 +332992.93 8250.0 – C57
2020-01-16 13:14:23 S 05 38 24.804 +80 03 11.09 – V C57
2020-01-16 13:14:23 s 1 -178857.10 1 +331917.57 9110.0 – C57
2020-01-16 13:44:23 S 05 38 16.728 +80 02 59.24 – V C57
2020-01-16 13:44:23 s 1 -179499.77 4 +330832.21 7110.0 – 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)