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
2019-12-31 20:14:23 S 07 55 16.742 +79 31 19.27 – V C57
2019-12-31 20:14:23 s 1 -94967.437 0 +397849.53 3370.0 – C57
2019-12-31 20:44:23 S 07 55 05.570 +79 31 38.82 – V C57
2019-12-31 20:44:23 s 1 -95855.168 0 +397463.96 720.0 – C57
2019-12-31 21:14:23 S 07 54 54.115 +79 31 59.27 – V C57
2019-12-31 21:14:23 s 1 -96741.170 0 +397070.96 6610.0 – C57
2019-12-31 21:44:23 S 07 54 42.698 +79 32 19.61 – V C57
2019-12-31 21:44:23 s 1 -97625.424 0 +396670.53 1000.0 – C57
2019-12-31 22:14:23 S 07 54 31.476 +79 32 39.08 – V C57
2019-12-31 22:14:23 s 1 -98507.911 0 +396262.66 3860.0 – C57
2019-12-31 22:44:23 S 07 54 19.879 +79 33 00.11 – V C57
2019-12-31 22:44:23 s 1 -99388.612 0 +395847.36 5140.0 – C57
2019-12-31 23:14:23 S 07 54 08.626 +79 33 18.32 – V C57
2019-12-31 23:14:23 s 1 -100267.50 7 +395424.62 4810.0 – C57
2019-12-31 23:44:23 S 07 53 57.036 +79 33 39.53 – V C57
2019-12-31 23:44:23 s 1 -101144.57 6 +394994.44 2840.0 – C57
2020-01-01 00:14:23 S 07 53 45.749 +79 33 58.00 – V C57
2020-01-01 00:14:23 s 1 -102019.80 0 +394556.81 9180.0 – C57
2020-01-01 00:44:23 S 07 53 34.178 +79 34 18.84 – V C57
2020-01-01 00:44:23 s 1 -102893.16 0 +394111.73 3800.0 – C57
2020-01-01 01:14:23 S 07 53 22.798 +79 34 37.56 – V C57
2020-01-01 01:14:23 s 1 -103764.63 6 +393659.20 6670.0 – C57
2020-01-01 01:44:23 S 07 53 11.530 +79 34 57.18 – V C57
2020-01-01 01:44:23 s 1 -104634.20 6 +393199.22 7730.0 – C57
2020-01-01 02:14:23 S 07 52 59.647 +79 35 17.27 – V C57
2020-01-01 02:14:23 s 1 -105501.85 3 +392731.77 6970.0 – C57
2020-01-01 02:44:23 S 07 52 48.370 +79 35 35.81 – V C57
2020-01-01 02:44:23 s 1 -106367.55 5 +392256.87 4330.0 – C57
2020-01-01 03:14:23 S 07 52 36.670 +79 35 56.72 – V C57
2020-01-01 03:14:23 s 1 -107231.29 3 +391774.49 9780.0 – C57
2020-01-01 03:44:23 S 07 52 25.342 +79 36 14.22 – V C57
2020-01-01 03:44:23 s 1 -108093.04 5 +391284.64 3280.0 – C57
2020-01-01 04:14:23 S 07 52 13.927 +79 36 34.85 – V C57
2020-01-01 04:14:23 s 1 -108952.79 2 +390787.32 4800.0 – C57
2020-01-01 04:44:23 S 07 52 02.338 +79 36 53.21 – V C57
2020-01-01 04:44:23 s 1 -109810.51 3 +390282.52 4300.0 – C57
2020-01-01 05:14:23 S 07 51 50.858 +79 37 13.01 – V C57
2020-01-01 05:14:23 s 1 -110666.18 7 +389770.23 1730.0 – C57
2020-01-01 05:44:23 S 07 51 39.005 +79 37 31.58 – V C57
2020-01-01 05:44:23 s 1 -111519.79 4 +389250.45 7070.0 – C57
2020-01-01 06:14:23 S 07 51 27.790 +79 37 51.13 – V C57
2020-01-01 06:14:23 s 1 -112371.31 3 +388723.17 260.0 – C57
2020-01-01 06:44:23 S 07 51 16.135 +79 38 09.31 – V C57
2020-01-01 06:44:23 s 1 -113220.72 2 +388188.40 1270.0 – C57
2020-01-01 07:14:23 S 07 51 04.442 +79 38 29.15 – V C57
2020-01-01 07:14:23 s 1 -114068.00 0 +387646.12 70.0 – C57
2020-01-01 07:44:23 S 07 50 53.210 +79 38 46.97 – V C57
2020-01-01 07:44:23 s 1 -114913.12 7 +387096.32 6610.0 – C57
2020-01-01 08:14:23 S 07 50 41.174 +79 39 06.55 – V C57
2020-01-01 08:14:23 s 1 -115756.08 0 +386539.01 850.0 – 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)