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
2020-01-14 11:14:23 S 05 53 07.675 +80 20 39.88 – V C57
2020-01-14 11:14:23 s 1 -97687.596 0 +401934.38 2440.0 – C57
2020-01-14 11:44:23 S 05 52 58.138 +80 20 31.60 – V C57
2020-01-14 11:44:23 s 1 -98623.497 0 +401602.10 7550.0 – C57
2020-01-14 12:14:23 S 05 52 48.494 +80 20 22.56 – V C57
2020-01-14 12:14:23 s 1 -99557.590 0 +401262.45 3000.0 – C57
2020-01-14 12:44:23 S 05 52 39.197 +80 20 14.03 – V C57
2020-01-14 12:44:23 s 1 -100489.85 5 +400915.45 8820.0 – C57
2020-01-14 13:14:23 S 05 52 29.371 +80 20 05.03 – V C57
2020-01-14 13:14:23 s 1 -101420.27 4 +400561.08 5060.0 – C57
2020-01-14 13:44:23 S 05 52 19.982 +80 19 56.39 – V C57
2020-01-14 13:44:23 s 1 -102348.82 8 +400199.36 1740.0 – C57
2020-01-14 14:14:23 S 05 52 10.433 +80 19 47.35 – V C57
2020-01-14 14:14:23 s 1 -103275.49 8 +399830.28 1110.0 – C57
2020-01-14 14:44:23 S 05 52 01.068 +80 19 38.06 – V C57
2020-01-14 14:44:23 s 1 -104200.26 3 +399453.85 3470.0 – C57
2020-01-14 15:14:23 S 05 51 51.866 +80 19 29.35 – V C57
2020-01-14 15:14:23 s 1 -105123.10 5 +399070.06 5280.0 – C57
2020-01-14 15:44:23 S 05 51 42.077 +80 19 19.99 – V C57
2020-01-14 15:44:23 s 1 -106044.00 3 +398678.91 6540.0 – C57
2020-01-14 16:14:23 S 05 51 32.923 +80 19 11.17 – V C57
2020-01-14 16:14:23 s 1 -106962.94 0 +398280.41 7200.0 – C57
2020-01-14 16:44:23 S 05 51 23.347 +80 19 02.21 – V C57
2020-01-14 16:44:23 s 1 -107879.89 4 +397874.55 7240.0 – C57
2020-01-14 17:14:23 S 05 51 13.886 +80 18 52.85 – V C57
2020-01-14 17:14:23 s 1 -108794.84 6 +397461.34 6620.0 – C57
2020-01-14 17:44:23 S 05 51 04.608 +80 18 44.21 – V C57
2020-01-14 17:44:23 s 1 -109707.77 7 +397040.78 5320.0 – C57
2020-01-14 18:14:23 S 05 50 55.094 +80 18 34.42 – V C57
2020-01-14 18:14:23 s 1 -110618.66 6 +396612.85 3290.0 – C57
2020-01-14 18:44:23 S 05 50 45.984 +80 18 25.34 – V C57
2020-01-14 18:44:23 s 1 -111527.49 4 +396177.58 520.0 – C57
2020-01-14 19:14:23 S 05 50 36.526 +80 18 15.95 – V C57
2020-01-14 19:14:23 s 1 -112434.24 1 +395734.94 6970.0 – C57
2020-01-14 19:44:23 S 05 50 27.374 +80 18 06.52 – V C57
2020-01-14 19:44:23 s 1 -113338.88 6 +395284.95 2600.0 – C57
2020-01-14 20:14:23 S 05 50 17.986 +80 17 57.05 – V C57
2020-01-14 20:14:23 s 1 -114241.41 0 +394827.60 7380.0 – C57
2020-01-14 20:44:23 S 05 50 08.630 +80 17 47.87 – V C57
2020-01-14 20:44:23 s 1 -115141.79 2 +394362.89 1290.0 – C57
2020-01-14 21:14:23 S 05 49 59.314 +80 17 38.83 – V C57
2020-01-14 21:14:23 s 1 -116040.01 1 +393890.82 4300.0 – C57
2020-01-14 21:44:23 S 05 49 49.999 +80 17 29.00 – V C57
2020-01-14 21:44:23 s 1 -116936.04 9 +393411.39 6360.0 – C57
2020-01-14 22:14:23 S 05 49 40.970 +80 17 19.18 – V C57
2020-01-14 22:14:23 s 1 -117829.88 3 +392924.60 7450.0 – C57
2020-01-14 22:44:23 S 05 49 31.651 +80 17 09.96 – V C57
2020-01-14 22:44:23 s 1 -118721.49 3 +392430.44 7530.0 – C57
2020-01-14 23:14:23 S 05 49 22.620 +80 17 00.53 – V C57
2020-01-14 23:14:23 s 1 -119610.85 9 +391928.92 6580.0 – 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)