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
2019-12-30 19:44:23 S 08 04 19.865 +79 13 30.29 – V C57
2019-12-30 19:44:23 s 1 -49731.229 0 +407651.94 5960.0 – C57
2019-12-30 20:14:23 S 08 04 08.767 +79 13 54.55 – V C57
2019-12-30 20:14:23 s 1 -50681.537 0 +407630.55 1160.0 – C57
2019-12-30 20:44:23 S 08 03 58.291 +79 14 16.48 – V C57
2019-12-30 20:44:23 s 1 -51630.985 0 +407601.67 6040.0 – C57
2019-12-30 21:14:23 S 08 03 47.333 +79 14 40.49 – V C57
2019-12-30 21:14:23 s 1 -52579.557 0 +407565.29 660.0 – C57
2019-12-30 21:44:23 S 08 03 36.449 +79 15 03.35 – V C57
2019-12-30 21:44:23 s 1 -53527.235 0 +407521.43 5040.0 – C57
2019-12-30 22:14:23 S 08 03 25.574 +79 15 26.10 – V C57
2019-12-30 22:14:23 s 1 -54474.002 0 +407470.09 9220.0 – C57
2019-12-30 22:44:23 S 08 03 14.849 +79 15 49.79 – V C57
2019-12-30 22:44:23 s 1 -55419.841 0 +407411.27 3240.0 – C57
2019-12-30 23:14:23 S 08 03 04.049 +79 16 12.14 – V C57
2019-12-30 23:14:23 s 1 -56364.735 0 +407344.98 7140.0 – C57
2019-12-30 23:44:23 S 08 02 53.030 +79 16 34.90 – V C57
2019-12-30 23:44:23 s 1 -57308.667 0 +407271.23 950.0 – C57
2019-12-31 00:14:23 S 08 02 42.230 +79 16 58.48 – V C57
2019-12-31 00:14:23 s 1 -58251.621 0 +407190.01 4710.0 – C57
2019-12-31 00:44:23 S 08 02 31.284 +79 17 20.87 – V C57
2019-12-31 00:44:23 s 1 -59193.577 0 +407101.33 8450.0 – C57
2019-12-31 01:14:23 S 08 02 20.398 +79 17 43.26 – V C57
2019-12-31 01:14:23 s 1 -60134.521 0 +407005.20 2210.0 – C57
2019-12-31 01:44:23 S 08 02 09.473 +79 18 06.66 – V C57
2019-12-31 01:44:23 s 1 -61074.434 0 +406901.62 6030.0 – C57
2019-12-31 02:14:23 S 08 01 58.488 +79 18 28.51 – V C57
2019-12-31 02:14:23 s 1 -62013.299 0 +406790.58 9950.0 – C57
2019-12-31 02:44:23 S 08 01 47.590 +79 18 51.01 – V C57
2019-12-31 02:44:23 s 1 -62951.099 0 +406672.11 3990.0 – C57
2019-12-31 03:14:23 S 08 01 36.346 +79 19 14.45 – V C57
2019-12-31 03:14:23 s 1 -63887.817 0 +406546.19 8200.0 – C57
2019-12-31 03:44:23 S 08 01 25.687 +79 19 35.29 – V C57
2019-12-31 03:44:23 s 1 -64823.436 0 +406412.83 2620.0 – C57
2019-12-31 04:14:23 S 08 01 14.700 +79 19 58.48 – V C57
2019-12-31 04:14:23 s 1 -65757.939 0 +406272.03 7270.0 – C57
2019-12-31 04:44:23 S 08 01 03.355 +79 20 20.58 – V C57
2019-12-31 04:44:23 s 1 -66691.307 0 +406123.81 2200.0 – C57
2019-12-31 05:14:23 S 08 00 52.668 +79 20 42.14 – V C57
2019-12-31 05:14:23 s 1 -67623.525 0 +405968.15 7430.0 – C57
2019-12-31 05:44:23 S 08 00 41.294 +79 21 05.94 – V C57
2019-12-31 05:44:23 s 1 -68554.573 0 +405805.06 3020.0 – C57
2019-12-31 06:14:23 S 08 00 30.538 +79 21 26.17 – V C57
2019-12-31 06:14:23 s 1 -69484.437 0 +405634.55 8980.0 – C57
2019-12-31 06:44:23 S 08 00 19.423 +79 21 49.14 – V C57
2019-12-31 06:44:23 s 1 -70413.097 0 +405456.61 5370.0 – C57
2019-12-31 07:14:23 S 08 00 08.309 +79 22 11.64 – V C57
2019-12-31 07:14:23 s 1 -71340.536 0 +405271.25 2200.0 – C57
2019-12-31 07:44:23 S 07 59 57.504 +79 22 32.12 – V C57
2019-12-31 07:44:23 s 1 -72266.737 0 +405078.47 9530.0 – 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)