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 21:14:23 S 07 36 00.823 +79 59 10.57 – V C57
2020-01-02 21:14:23 s 1 -170355.44 1 +323815.25 5490.0 – C57
2020-01-02 21:44:23 S 07 35 48.583 +79 59 24.18 – V C57
2020-01-02 21:44:23 s 1 -170960.14 2 +322665.42 3820.0 – C57
2020-01-02 22:14:23 S 07 35 36.701 +79 59 37.18 – V C57
2020-01-02 22:14:23 s 1 -171560.39 4 +321507.12 5860.0 – C57
2020-01-02 22:44:23 S 07 35 24.259 +79 59 51.97 – V C57
2020-01-02 22:44:23 s 1 -172156.15 4 +320340.32 1530.0 – C57
2020-01-02 23:14:23 S 07 35 12.295 +80 00 04.61 – V C57
2020-01-02 23:14:23 s 1 -172747.37 6 +319165.01 750.0 – C57
2020-01-02 23:44:23 S 07 35 00.060 +80 00 18.47 – V C57
2020-01-02 23:44:23 s 1 -173334.01 8 +317981.16 3460.0 – C57
2020-01-03 00:14:23 S 07 34 47.782 +80 00 32.29 – V C57
2020-01-03 00:14:23 s 1 -173916.03 4 +316788.74 9560.0 – C57
2020-01-03 00:44:23 S 07 34 35.702 +80 00 44.64 – V C57
2020-01-03 00:44:23 s 1 -174493.37 8 +315587.75 8990.0 – C57
2020-01-03 01:14:23 S 07 34 23.467 +80 00 58.93 – V C57
2020-01-03 01:14:23 s 1 -175066.00 4 +314378.15 1660.0 – C57
2020-01-03 01:44:23 S 07 34 11.371 +80 01 11.64 – V C57
2020-01-03 01:44:23 s 1 -175633.86 6 +313159.92 7490.0 – C57
2020-01-03 02:14:23 S 07 33 59.134 +80 01 24.67 – V C57
2020-01-03 02:14:23 s 1 -176196.91 7 +311933.04 6410.0 – C57
2020-01-03 02:44:23 S 07 33 47.011 +80 01 38.50 – V C57
2020-01-03 02:44:23 s 1 -176755.10 7 +310697.50 8320.0 – C57
2020-01-03 03:14:23 S 07 33 34.663 +80 01 50.99 – V C57
2020-01-03 03:14:23 s 1 -177308.39 0 +309453.25 3140.0 – C57
2020-01-03 03:44:23 S 07 33 22.711 +80 02 03.91 – V C57
2020-01-03 03:44:23 s 1 -177856.71 4 +308200.29 800.0 – C57
2020-01-03 04:14:23 S 07 33 10.399 +80 02 17.30 – V C57
2020-01-03 04:14:23 s 1 -178400.03 2 +306938.58 1190.0 – C57
2020-01-03 04:44:23 S 07 32 58.174 +80 02 29.40 – V C57
2020-01-03 04:44:23 s 1 -178938.29 2 +305668.11 4250.0 – C57
2020-01-03 05:14:23 S 07 32 46.097 +80 02 42.68 – V C57
2020-01-03 05:14:23 s 1 -179471.44 3 +304388.84 9860.0 – C57
2020-01-03 05:44:23 S 07 32 33.562 +80 02 55.68 – V C57
2020-01-03 05:44:23 s 1 -179999.43 3 +303100.76 7960.0 – C57
2020-01-03 06:14:23 S 07 32 21.725 +80 03 07.09 – V C57
2020-01-03 06:14:23 s 1 -180522.21 0 +301803.83 8440.0 – C57
2020-01-03 06:44:23 S 07 32 09.235 +80 03 20.70 – V C57
2020-01-03 06:44:23 s 1 -181039.72 0 +300498.04 1220.0 – C57
2020-01-03 07:14:23 S 07 31 56.945 +80 03 33.08 – V C57
2020-01-03 07:14:23 s 1 -181551.91 0 +299183.36 6190.0 – C57
2020-01-03 07:44:23 S 07 31 45.082 +80 03 44.68 – V C57
2020-01-03 07:44:23 s 1 -182058.72 4 +297859.75 3270.0 – C57
2020-01-03 08:14:23 S 07 31 32.410 +80 03 58.14 – V C57
2020-01-03 08:14:23 s 1 -182560.10 8 +296527.21 2360.0 – C57
2020-01-03 08:44:23 S 07 31 20.482 +80 04 09.88 – V C57
2020-01-03 08:44:23 s 1 -183056.00 4 +295185.69 3370.0 – C57
2020-01-03 09:14:23 S 07 31 08.035 +80 04 21.65 – V C57
2020-01-03 09:14:23 s 1 -183546.35 7 +293835.17 6180.0 – 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)