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
2020-01-04 09:14:23 s 1 -199192.82 6 +217815.85 880.0 – C57
2020-01-04 09:44:23 S 07 21 06.137 +80 12 57.24 – V C57
2020-01-04 09:44:23 s 1 -199319.14 8 +215984.22 770.0 – C57
2020-01-04 10:14:23 S 07 20 54.002 +80 13 04.98 – V C57
2020-01-04 10:14:23 s 1 -199435.53 1 +214141.80 4720.0 – C57
2020-01-04 10:44:23 S 07 20 41.623 +80 13 13.51 – V C57
2020-01-04 10:44:23 s 1 -199541.84 0 +212288.53 2500.0 – C57
2020-01-04 11:14:23 S 07 20 29.522 +80 13 23.09 – V C57
2020-01-04 11:14:23 s 1 -199637.93 8 +210424.36 3850.0 – C57
2020-01-04 11:44:23 S 07 20 17.100 +80 13 31.98 – V C57
2020-01-04 11:44:23 s 1 -199723.68 5 +208549.26 8530.0 – C57
2020-01-04 12:14:23 S 07 20 05.009 +80 13 39.76 – V C57
2020-01-04 12:14:23 s 1 -199798.93 8 +206663.17 6270.0 – C57
2020-01-04 12:44:23 S 07 19 52.706 +80 13 47.68 – V C57
2020-01-04 12:44:23 s 1 -199863.55 0 +204766.05 6820.0 – C57
2020-01-04 13:14:23 S 07 19 40.337 +80 13 56.75 – V C57
2020-01-04 13:14:23 s 1 -199917.37 3 +202857.85 9910.0 – C57
2020-01-04 13:44:23 S 07 19 28.198 +80 14 05.17 – V C57
2020-01-04 13:44:23 s 1 -199960.25 5 +200938.52 5260.0 – C57
2020-01-04 14:14:23 S 07 19 15.794 +80 14 13.24 – V C57
2020-01-04 14:14:23 s 1 -199992.03 9 +199008.01 2580.0 – C57
2020-01-04 14:44:23 S 07 19 03.662 +80 14 20.65 – V C57
2020-01-04 14:44:23 s 1 -200012.56 8 +197066.28 1600.0 – C57
2020-01-04 15:05:22 C 07 20 04.67 +80 08 21.1 – o D54
2020-01-04 15:06:52 C 07 20 04.04 +80 08 21.6 – o D54
2020-01-04 15:09:55 C 07 20 02.88 +80 08 22.7 – o D54
2020-01-04 15:14:23 S 07 18 51.283 +80 14 29.00 – V C57
2020-01-04 15:14:23 s 1 -200021.67 9 +195113.27 2020.0 – C57
2020-01-04 15:44:23 S 07 18 39.151 +80 14 37.57 – V C57
2020-01-04 15:44:23 s 1 -200019.20 5 +193148.93 3540.0 – C57
2020-01-04 16:02:40 C 07 19 41.60 +80 08 41.8 – o D54
2020-01-04 16:04:09 C 07 19 41.00 +80 08 42.6 – o D54
2020-01-04 16:14:23 S 07 18 26.890 +80 14 45.28 – V C57
2020-01-04 16:14:23 s 1 -200004.97 8 +191173.22 5840.0 – C57
2020-01-04 16:44:23 S 07 18 14.587 +80 14 52.55 – V C57
2020-01-04 16:44:23 s 1 -199978.82 4 +189186.08 8630.0 – C57
2020-01-04 17:14:23 S 07 18 02.486 +80 15 00.04 – V C57
2020-01-04 17:14:23 s 1 -199940.56 6 +187187.47 1570.0 – C57
2020-01-04 17:44:23 S 07 17 49.954 +80 15 08.57 – V C57
2020-01-04 17:44:23 s 1 -199890.02 3 +185177.33 4330.0 – C57
2020-01-04 18:14:23 S 07 17 37.922 +80 15 16.24 – V C57
2020-01-04 18:14:23 s 1 -199827.00 8 +183155.62 6580.0 – C57
2020-01-04 18:44:23 S 07 17 25.766 +80 15 23.54 – V C57
2020-01-04 18:44:23 s 1 -199751.33 4 +181122.28 7970.0 – C57
2020-01-04 19:44:23 S 07 17 01.630 +80 15 37.98 – V C57
2020-01-04 19:44:23 s 1 -199561.22 3 +177020.50 6750.0 – C57
2020-01-04 20:14:23 S 07 16 48.840 +80 15 46.12 – V C57
2020-01-04 20:14:23 s 1 -199446.38 5 +174951.97 3400.0 – C57
2020-01-04 20:44:23 S 07 16 36.876 +80 15 53.28 – V C57
2020-01-04 20:44:23 s 1 -199318.08 2 +172871.60 7730.0 – 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)