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
2019-07-02 05:14:30 S 06 55 30.778 -68 51 41.11 V C57
2019-07-02 05:14:30 s 1 -178012.89 2 +39982.369 3170.0 C57
2019-07-02 05:44:30 S 06 55 32.592 -68 49 58.04 V C57
2019-07-02 05:44:30 s 1 -176750.56 4 +37400.784 5530.0 C57
2019-07-02 06:14:30 S 06 55 34.082 -68 48 28.84 V C57
2019-07-02 06:14:30 s 1 -175455.34 4 +34812.232 3340.0 C57
2019-07-02 06:44:30 S 06 55 36.043 -68 46 42.46 V C57
2019-07-02 06:44:30 s 1 -174126.54 3 +32217.009 3830.0 C57
2019-07-02 07:14:30 S 06 55 37.565 -68 45 11.20 V C57
2019-07-02 07:14:30 s 1 -172763.45 7 +29615.433 4170.0 C57
2019-07-02 07:44:30 S 06 55 39.394 -68 43 39.43 V C57
2019-07-02 07:44:30 s 1 -171365.35 8 +27007.844 1440.0 C57
2019-07-02 08:14:30 S 06 55 41.172 -68 41 56.15 V C57
2019-07-02 08:14:30 s 1 -169931.50 0 +24394.608 2620.0 C57
2019-07-02 08:44:30 S 06 55 42.727 -68 40 23.95 V C57
2019-07-02 08:44:30 s 1 -168461.11 6 +21776.117 4580.0 C57
2019-07-02 09:14:30 S 06 55 44.741 -68 38 39.84 V C57
2019-07-02 09:14:30 s 1 -166953.41 7 +19152.788 4120.0 C57
2019-07-02 09:44:30 S 06 55 46.342 -68 37 09.55 V C57
2019-07-02 09:44:30 s 1 -165407.59 3 +16525.072 7900.0 C57
2019-07-02 10:14:30 S 06 55 48.300 -68 35 28.72 V C57
2019-07-02 10:14:30 s 1 -163822.80 9 +13893.448 2500.0 C57
2019-07-02 10:44:30 S 06 55 50.062 -68 33 54.97 V C57
2019-07-02 10:44:30 s 1 -162198.21 1 +11258.430 4380.0 C57
2019-07-02 12:44:30 S 06 55 57.463 -68 27 30.64 V C57
2019-07-02 12:44:30 s 1 -155283.73 6 + 696.050 9740.0 C57
2019-07-02 13:14:30 S 06 55 59.347 -68 25 54.55 V C57
2019-07-02 13:14:30 s 1 -153446.40 4 - 1946.848 760.0 C57
2019-07-02 13:44:30 S 06 56 01.123 -68 24 18.61 V C57
2019-07-02 13:44:30 s 1 -151563.62 5 - 4589.192 5290.0 C57
2019-07-02 14:14:30 S 06 56 03.175 -68 22 40.98 V C57
2019-07-02 14:14:30 s 1 -149634.37 5 - 7230.153 8920.0 C57
2019-07-02 14:44:30 S 06 56 05.122 -68 21 05.62 V C57
2019-07-02 14:44:30 s 1 -147657.60 8 - 9868.843 7110.0 C57
2019-07-02 15:14:30 S 06 56 06.965 -68 19 30.43 V C57
2019-07-02 15:14:30 s 1 -145632.25 2 -12504.311 5190.0 C57
2019-07-02 15:44:30 S 06 56 09.024 -68 17 54.38 V C57
2019-07-02 15:44:30 s 1 -143557.21 3 -15135.540 8310.0 C57
2019-07-02 16:44:30 S 06 56 12.922 -68 14 44.59 V C57
2019-07-02 16:44:30 s 1 -139253.59 9 -20380.850 9760.0 C57
2019-07-02 17:14:30 S 06 56 15.314 -68 13 09.01 V C57
2019-07-02 17:14:30 s 1 -137022.72 8 -22992.517 7730.0 C57
2019-07-02 17:44:30 S 06 56 17.143 -68 11 31.31 V C57
2019-07-02 17:44:30 s 1 -134737.58 5 -25595.108 70.0 C57
2019-07-02 18:14:30 S 06 56 19.027 -68 10 00.88 V C57
2019-07-02 18:14:30 s 1 -132396.97 6 -28187.195 1280.0 C57
2019-07-02 18:44:30 S 06 56 21.242 -68 08 21.59 V C57
2019-07-02 18:44:30 s 1 -129999.69 6 -30767.250 5680.0 C57
2019-07-02 19:14:30 S 06 56 23.446 -68 06 44.53 V C57
2019-07-02 19:14:30 s 1 -127544.52 4 -33333.637 7520.0 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)