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
2020-01-08 10:44:23 S 06 45 43.850 +80 30 07.13 – V C57
2020-01-08 10:44:23 s 1 +144538.96 4 +127407.91 8600.0 – C57
2020-01-08 11:14:23 S 06 45 32.870 +80 30 13.57 – V C57
2020-01-08 11:14:23 s 1 +144621.66 6 +130202.98 600.0 – C57
2020-01-08 11:44:23 S 06 45 21.386 +80 30 20.20 – V C57
2020-01-08 11:44:23 s 1 +144679.92 3 +132976.29 8800.0 – C57
2020-01-08 12:14:23 S 06 45 10.152 +80 30 25.74 – V C57
2020-01-08 12:14:23 s 1 +144714.41 3 +135728.00 4600.0 – C57
2020-01-08 12:44:23 S 06 44 59.098 +80 30 32.22 – V C57
2020-01-08 12:44:23 s 1 +144725.78 8 +138458.29 9340.0 – C57
2020-01-08 13:14:23 S 06 44 47.477 +80 30 38.16 – V C57
2020-01-08 13:14:23 s 1 +144714.67 4 +141167.34 4330.0 – C57
2020-01-08 13:44:23 S 06 44 36.278 +80 30 43.49 – V C57
2020-01-08 13:44:23 s 1 +144681.67 6 +143855.31 830.0 – C57
2020-01-08 14:14:23 S 06 44 25.109 +80 30 49.57 – V C57
2020-01-08 14:14:23 s 1 +144627.37 4 +146522.38 40.0 – C57
2020-01-08 14:44:23 S 06 44 13.709 +80 30 55.44 – V C57
2020-01-08 14:44:23 s 1 +144552.32 9 +149168.72 3150.0 – C57
2020-01-08 15:14:23 S 06 44 02.570 +80 31 00.37 – V C57
2020-01-08 15:14:23 s 1 +144457.08 0 +151794.51 1280.0 – C57
2020-01-08 15:44:23 S 06 43 51.074 +80 31 06.82 – V C57
2020-01-08 15:44:23 s 1 +144342.14 9 +154399.92 5540.0 – C57
2020-01-08 16:14:23 S 06 43 39.778 +80 31 11.93 – V C57
2020-01-08 16:14:23 s 1 +144208.03 6 +156985.13 6990.0 – C57
2020-01-08 16:44:23 S 06 43 28.298 +80 31 16.82 – V C57
2020-01-08 16:44:23 s 1 +144055.22 7 +159550.31 6650.0 – C57
2020-01-08 17:14:23 S 06 43 17.196 +80 31 22.69 – V C57
2020-01-08 17:14:23 s 1 +143884.18 9 +162095.62 5520.0 – C57
2020-01-08 17:44:23 S 06 43 05.506 +80 31 28.16 – V C57
2020-01-08 17:44:23 s 1 +143695.37 3 +164621.25 4550.0 – C57
2020-01-08 18:14:23 S 06 42 54.458 +80 31 32.56 – V C57
2020-01-08 18:14:23 s 1 +143489.21 6 +167127.35 4700.0 – C57
2020-01-08 18:44:23 S 06 42 42.881 +80 31 38.17 – V C57
2020-01-08 18:44:23 s 1 +143266.13 8 +169614.10 6840.0 – C57
2020-01-08 19:14:23 S 06 42 31.272 +80 31 43.36 – V C57
2020-01-08 19:14:23 s 1 +143026.54 8 +172081.66 1880.0 – C57
2020-01-08 19:44:23 S 06 42 20.160 +80 31 47.96 – V C57
2020-01-08 19:44:23 s 1 +142770.83 8 +174530.20 640.0 – C57
2020-01-08 20:14:23 S 06 42 08.474 +80 31 53.18 – V C57
2020-01-08 20:14:23 s 1 +142499.39 0 +176959.88 3970.0 – C57
2020-01-08 20:44:23 S 06 41 57.266 +80 31 58.26 – V C57
2020-01-08 20:44:23 s 1 +142212.57 2 +179370.86 2650.0 – C57
2020-01-08 21:14:23 S 06 41 45.938 +80 32 02.62 – V C57
2020-01-08 21:14:23 s 1 +141910.74 1 +181763.30 7460.0 – C57
2020-01-08 21:44:23 S 06 41 34.253 +80 32 07.26 – V C57
2020-01-08 21:44:23 s 1 +141594.24 1 +184137.36 9150.0 – C57
2020-01-08 22:14:23 S 06 41 22.987 +80 32 12.41 – V C57
2020-01-08 22:14:23 s 1 +141263.40 8 +186493.19 8460.0 – C57
2020-01-08 22:44:23 S 06 41 11.383 +80 32 17.16 – V C57
2020-01-08 22:44:23 s 1 +140918.56 5 +188830.95 6090.0 – 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)