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
2020-01-01 21:14:23 S 07 45 36.732 +79 46 50.41 – V C57
2020-01-01 21:14:23 s 1 -136836.34 0 +369388.26 1180.0 – C57
2020-01-01 21:44:23 S 07 45 24.869 +79 47 06.58 – V C57
2020-01-01 21:44:23 s 1 -137611.96 0 +368625.28 7740.0 – C57
2020-01-01 22:14:23 S 07 45 13.058 +79 47 24.43 – V C57
2020-01-01 22:14:23 s 1 -138384.74 2 +367854.55 820.0 – C57
2020-01-01 22:44:23 S 07 45 01.128 +79 47 40.24 – V C57
2020-01-01 22:44:23 s 1 -139154.65 9 +367076.06 350.0 – C57
2020-01-01 23:14:23 S 07 44 49.253 +79 47 58.13 – V C57
2020-01-01 23:14:23 s 1 -139921.68 5 +366289.82 6300.0 – C57
2020-01-01 23:44:23 S 07 44 37.438 +79 48 14.00 – V C57
2020-01-01 23:44:23 s 1 -140685.79 3 +365495.80 8610.0 – C57
2020-01-02 00:14:23 S 07 44 25.570 +79 48 31.61 – V C57
2020-01-02 00:14:23 s 1 -141446.95 6 +364694.00 7240.0 – C57
2020-01-02 00:44:23 S 07 44 13.704 +79 48 47.38 – V C57
2020-01-02 00:44:23 s 1 -142205.14 5 +363884.40 2140.0 – C57
2020-01-02 01:14:23 S 07 44 01.817 +79 49 04.73 – V C57
2020-01-02 01:14:23 s 1 -142960.33 5 +363066.99 3270.0 – C57
2020-01-02 01:44:23 S 07 43 50.066 +79 49 20.46 – V C57
2020-01-02 01:44:23 s 1 -143712.49 6 +362241.77 560.0 – C57
2020-01-02 02:14:23 S 07 43 37.949 +79 49 37.24 – V C57
2020-01-02 02:14:23 s 1 -144461.60 0 +361408.71 3980.0 – C57
2020-01-02 02:44:23 S 07 43 26.242 +79 49 52.93 – V C57
2020-01-02 02:44:23 s 1 -145207.62 0 +360567.81 3470.0 – C57
2020-01-02 03:14:23 S 07 43 14.170 +79 50 09.64 – V C57
2020-01-02 03:14:23 s 1 -145950.52 6 +359719.06 8990.0 – C57
2020-01-02 03:44:23 S 07 43 02.340 +79 50 25.80 – V C57
2020-01-02 03:44:23 s 1 -146690.28 9 +358862.44 470.0 – C57
2020-01-02 04:14:23 S 07 42 50.443 +79 50 41.06 – V C57
2020-01-02 04:14:23 s 1 -147426.88 1 +357997.94 7880.0 – C57
2020-01-02 04:44:23 S 07 42 38.393 +79 50 58.34 – V C57
2020-01-02 04:44:23 s 1 -148160.27 1 +357125.54 1160.0 – C57
2020-01-02 05:14:23 S 07 42 26.623 +79 51 13.14 – V C57
2020-01-02 05:14:23 s 1 -148890.43 0 +356245.24 250.0 – C57
2020-01-02 05:44:23 S 07 42 14.376 +79 51 30.60 – V C57
2020-01-02 05:44:23 s 1 -149617.32 9 +355357.03 5110.0 – C57
2020-01-02 06:14:23 S 07 42 02.801 +79 51 45.14 – V C57
2020-01-02 06:14:23 s 1 -150340.93 6 +354460.87 5680.0 – C57
2020-01-02 06:44:23 S 07 41 50.628 +79 52 01.49 – V C57
2020-01-02 06:44:23 s 1 -151061.22 0 +353556.78 1910.0 – C57
2020-01-02 07:14:23 S 07 41 38.597 +79 52 17.15 – V C57
2020-01-02 07:14:23 s 1 -151778.15 2 +352644.72 3740.0 – C57
2020-01-02 07:44:23 S 07 41 26.722 +79 52 32.23 – V C57
2020-01-02 07:44:23 s 1 -152491.70 0 +351724.69 1130.0 – C57
2020-01-02 08:14:23 S 07 41 14.434 +79 52 48.76 – V C57
2020-01-02 08:14:23 s 1 -153201.83 2 +350796.67 4010.0 – C57
2020-01-02 08:44:23 S 07 41 02.746 +79 53 03.30 – V C57
2020-01-02 08:44:23 s 1 -153908.51 7 +349860.65 2330.0 – C57
2020-01-02 09:14:23 S 07 40 50.621 +79 53 19.79 – V C57
2020-01-02 09:14:23 s 1 -154611.72 2 +348916.62 6030.0 – 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)