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
2020-01-02 09:44:23 S 07 40 38.592 +79 53 34.19 – V C57
2020-01-02 09:44:23 s 1 -155311.41 5 +347964.55 5060.0 – C57
2020-01-02 10:14:23 S 07 40 26.671 +79 53 50.57 – V C57
2020-01-02 10:14:23 s 1 -156007.56 2 +347004.43 9360.0 – C57
2020-01-02 10:44:23 S 07 40 14.599 +79 54 05.18 – V C57
2020-01-02 10:44:23 s 1 -156700.13 2 +346036.25 8880.0 – C57
2020-01-02 11:14:23 S 07 40 02.590 +79 54 20.52 – V C57
2020-01-02 11:14:23 s 1 -157389.09 0 +345060.00 3550.0 – C57
2020-01-02 11:41:27 C 07 39 50.13 +79 45 21.7 – V T08
2020-01-02 11:44:23 S 07 39 50.539 +79 54 35.82 – V C57
2020-01-02 11:44:23 s 1 -158074.40 2 +344075.65 3320.0 – C57
2020-01-02 11:46:07 C 07 39 48.30 +79 45 24.4 – V T08
2020-01-02 11:59:59 C 07 39 42.90 +79 45 31.5 – V T08
2020-01-02 12:14:23 S 07 39 38.558 +79 54 50.18 – V C57
2020-01-02 12:14:23 s 1 -158756.03 4 +343083.20 8120.0 – C57
2020-01-02 12:22:17 C 07 39 34.18 +79 45 43.3 – V T08
2020-01-02 12:44:23 S 07 39 26.501 +79 55 06.28 – V C57
2020-01-02 12:44:23 s 1 -159433.95 3 +342082.61 7900.0 – C57
2020-01-02 13:14:23 S 07 39 14.556 +79 55 20.17 – V C57
2020-01-02 13:14:23 s 1 -160108.59 6 +341075.96 4100.0 – C57
2020-01-02 13:44:23 S 07 39 02.395 +79 55 35.87 – V C57
2020-01-02 13:44:23 s 1 -160778.98 4 +340059.10 3630.0 – C57
2020-01-02 14:14:23 S 07 38 50.321 +79 55 50.38 – V C57
2020-01-02 14:14:23 s 1 -161445.55 3 +339034.06 7940.0 – C57
2020-01-02 14:44:23 S 07 38 38.316 +79 56 04.49 – V C57
2020-01-02 14:44:23 s 1 -162108.26 6 +338000.83 6990.0 – C57
2020-01-02 15:14:23 S 07 38 25.994 +79 56 20.22 – V C57
2020-01-02 15:14:23 s 1 -162767.08 6 +336959.39 710.0 – C57
2020-01-02 15:44:23 S 07 38 14.242 +79 56 33.54 – V C57
2020-01-02 15:44:23 s 1 -163421.97 6 +335909.72 9030.0 – C57
2020-01-02 16:14:23 S 07 38 02.028 +79 56 48.98 – V C57
2020-01-02 16:14:23 s 1 -164072.89 9 +334851.81 1890.0 – C57
2020-01-02 16:44:23 S 07 37 49.661 +79 57 03.17 – V C57
2020-01-02 16:44:23 s 1 -164719.81 8 +333785.64 9230.0 – C57
2020-01-02 17:14:23 S 07 37 37.946 +79 57 16.99 – V C57
2020-01-02 17:14:23 s 1 -165362.69 4 +332711.19 980.0 – C57
2020-01-02 17:44:23 S 07 37 25.380 +79 57 32.51 – V C57
2020-01-02 17:44:23 s 1 -166001.48 9 +331628.44 7060.0 – C57
2020-01-02 18:14:23 S 07 37 13.658 +79 57 45.36 – V C57
2020-01-02 18:14:23 s 1 -166636.16 3 +330537.38 7420.0 – C57
2020-01-02 18:44:23 S 07 37 01.490 +79 58 00.52 – V C57
2020-01-02 18:44:23 s 1 -167266.67 8 +329437.98 1990.0 – C57
2020-01-02 19:14:23 S 07 36 49.250 +79 58 14.27 – V C57
2020-01-02 19:14:23 s 1 -167892.99 3 +328330.22 700.0 – C57
2020-01-02 19:44:23 S 07 36 37.471 +79 58 27.95 – V C57
2020-01-02 19:44:23 s 1 -168515.06 8 +327214.09 3470.0 – C57
2020-01-02 20:14:23 S 07 36 24.859 +79 58 43.10 – V C57
2020-01-02 20:14:23 s 1 -169132.86 2 +326089.56 240.0 – C57
2020-01-02 20:44:23 S 07 36 13.106 +79 58 55.88 – V C57
2020-01-02 20:44:23 s 1 -169746.33 4 +324956.62 940.0 – 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)