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
2020-01-03 20:44:23 s 1 -193149.70 2 +260222.94 10.0 – C57
2020-01-03 21:14:23 S 07 26 13.634 +80 08 55.14 – V C57
2020-01-03 21:14:23 s 1 -193487.48 6 +258647.53 2390.0 – C57
2020-01-03 21:44:23 S 07 26 00.607 +80 09 05.18 – V C57
2020-01-03 21:44:23 s 1 -193817.98 4 +257062.34 3530.0 – C57
2020-01-03 22:14:23 S 07 25 49.176 +80 09 14.72 – V C57
2020-01-03 22:14:23 s 1 -194141.11 2 +255467.34 3310.0 – C57
2020-01-03 22:44:23 S 07 25 36.636 +80 09 26.68 – V C57
2020-01-03 22:44:23 s 1 -194456.78 2 +253862.48 1550.0 – C57
2020-01-03 23:14:23 S 07 25 24.542 +80 09 36.14 – V C57
2020-01-03 23:14:23 s 1 -194764.90 8 +252247.73 8120.0 – C57
2020-01-03 23:44:23 S 07 25 12.139 +80 09 46.91 – V C57
2020-01-03 23:44:23 s 1 -195065.40 0 +250623.06 2850.0 – C57
2020-01-04 00:14:23 S 07 24 59.731 +80 09 57.53 – V C57
2020-01-04 00:14:23 s 1 -195358.16 6 +248988.42 5570.0 – C57
2020-01-04 00:44:23 S 07 24 47.642 +80 10 07.07 – V C57
2020-01-04 00:44:23 s 1 -195643.11 5 +247343.78 6140.0 – C57
2020-01-04 01:14:23 S 07 24 35.246 +80 10 16.72 – V C57
2020-01-04 01:14:23 s 1 -195920.15 1 +245689.10 4380.0 – C57
2020-01-04 01:44:23 S 07 24 22.958 +80 10 27.44 – V C57
2020-01-04 01:44:23 s 1 -196189.18 0 +244024.34 120.0 – C57
2020-01-04 02:14:23 S 07 24 10.308 +80 10 37.24 – V C57
2020-01-04 02:14:23 s 1 -196450.10 2 +242349.46 3180.0 – C57
2020-01-04 02:44:23 S 07 23 58.591 +80 10 45.05 – V C57
2020-01-04 02:44:23 s 1 -196702.82 0 +240664.42 3410.0 – C57
2020-01-04 03:14:23 S 07 23 45.958 +80 10 55.81 – V C57
2020-01-04 03:14:23 s 1 -196947.23 2 +238969.19 600.0 – C57
2020-01-04 03:44:23 S 07 23 33.670 +80 11 06.94 – V C57
2020-01-04 03:44:23 s 1 -197183.23 5 +237263.72 4590.0 – C57
2020-01-04 04:14:23 S 07 23 21.610 +80 11 15.79 – V C57
2020-01-04 04:14:23 s 1 -197410.72 4 +235547.96 5190.0 – C57
2020-01-04 04:44:23 S 07 23 09.110 +80 11 24.83 – V C57
2020-01-04 04:44:23 s 1 -197629.59 2 +233821.89 2200.0 – C57
2020-01-04 05:14:23 S 07 22 56.988 +80 11 34.98 – V C57
2020-01-04 05:14:23 s 1 -197839.73 1 +232085.46 5430.0 – C57
2020-01-04 05:44:23 S 07 22 44.374 +80 11 44.74 – V C57
2020-01-04 05:44:23 s 1 -198041.03 0 +230338.62 4690.0 – C57
2020-01-04 06:14:23 S 07 22 32.434 +80 11 53.38 – V C57
2020-01-04 06:14:23 s 1 -198233.37 5 +228581.34 9780.0 – C57
2020-01-04 06:44:23 S 07 22 20.146 +80 12 02.12 – V C57
2020-01-04 06:44:23 s 1 -198416.65 2 +226813.57 490.0 – C57
2020-01-04 07:14:23 S 07 22 07.661 +80 12 12.24 – V C57
2020-01-04 07:14:23 s 1 -198590.74 3 +225035.26 6610.0 – C57
2020-01-04 07:44:23 S 07 21 55.510 +80 12 21.20 – V C57
2020-01-04 07:44:23 s 1 -198755.52 9 +223246.38 7930.0 – C57
2020-01-04 08:14:23 S 07 21 42.979 +80 12 29.92 – V C57
2020-01-04 08:14:23 s 1 -198910.88 8 +221446.88 4230.0 – C57
2020-01-04 08:44:23 S 07 21 30.859 +80 12 38.45 – V C57
2020-01-04 08:44:23 s 1 -199056.69 6 +219636.72 5290.0 – C57
2020-01-04 09:14:23 S 07 21 18.430 +80 12 47.99 – 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)