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
2019-12-27 12:14:23 s 1 +98745.470 0 +306836.76 7040.0 – C57
2019-12-27 12:44:23 S 08 29 43.870 +77 59 25.40 – V C57
2019-12-27 12:44:23 s 1 +97940.099 0 +308216.91 6560.0 – C57
2019-12-27 13:14:23 S 08 29 35.676 +77 59 57.34 – V C57
2019-12-27 13:14:23 s 1 +97130.990 0 +309585.59 4000.0 – C57
2019-12-27 13:44:23 S 08 29 27.226 +78 00 30.17 – V C57
2019-12-27 13:44:23 s 1 +96318.210 0 +310942.89 9540.0 – C57
2019-12-27 14:14:23 S 08 29 18.612 +78 01 03.58 – V C57
2019-12-27 14:14:23 s 1 +95501.821 0 +312288.85 3350.0 – C57
2019-12-27 14:44:23 S 08 29 10.279 +78 01 35.76 – V C57
2019-12-27 14:44:23 s 1 +94681.887 0 +313623.52 5580.0 – C57
2019-12-27 15:14:23 S 08 29 01.757 +78 02 09.10 – V C57
2019-12-27 15:14:23 s 1 +93858.469 0 +314946.98 6410.0 – C57
2019-12-27 15:44:23 S 08 28 53.515 +78 02 40.56 – V C57
2019-12-27 15:44:23 s 1 +93031.628 0 +316259.27 5990.0 – C57
2019-12-27 16:14:23 S 08 28 44.909 +78 03 13.18 – V C57
2019-12-27 16:14:23 s 1 +92201.424 0 +317560.46 4480.0 – C57
2019-12-27 16:44:23 S 08 28 36.173 +78 03 45.83 – V C57
2019-12-27 16:44:23 s 1 +91367.914 0 +318850.59 2040.0 – C57
2019-12-27 17:14:23 S 08 28 27.830 +78 04 17.18 – V C57
2019-12-27 17:14:23 s 1 +90531.158 0 +320129.72 8810.0 – C57
2019-12-27 17:44:23 S 08 28 19.219 +78 04 50.30 – V C57
2019-12-27 17:44:23 s 1 +89691.210 0 +321397.90 4950.0 – C57
2019-12-27 18:14:23 S 08 28 10.778 +78 05 21.59 – V C57
2019-12-27 18:14:23 s 1 +88848.128 0 +322655.19 610.0 – C57
2019-12-27 18:44:23 S 08 28 02.040 +78 05 53.70 – V C57
2019-12-27 18:44:23 s 1 +88001.965 0 +323901.65 5930.0 – C57
2019-12-27 19:14:23 S 08 27 53.460 +78 06 25.78 – V C57
2019-12-27 19:14:23 s 1 +87152.776 0 +325137.31 1050.0 – C57
2019-12-27 19:44:23 S 08 27 45.024 +78 06 57.92 – V C57
2019-12-27 19:44:23 s 1 +86300.614 0 +326362.24 6120.0 – C57
2019-12-27 20:14:23 S 08 27 36.319 +78 07 29.82 – V C57
2019-12-27 20:14:23 s 1 +85445.532 0 +327576.47 1260.0 – C57
2019-12-27 20:44:23 S 08 27 27.742 +78 08 01.57 – V C57
2019-12-27 20:44:23 s 1 +84587.580 0 +328780.07 6630.0 – C57
2019-12-27 21:14:23 S 08 27 18.878 +78 08 33.68 – V C57
2019-12-27 21:14:23 s 1 +83726.809 0 +329973.09 2350.0 – C57
2019-12-27 21:44:23 S 08 27 10.267 +78 09 05.69 – V C57
2019-12-27 21:44:23 s 1 +82863.269 0 +331155.56 8560.0 – C57
2019-12-27 22:14:23 S 08 27 01.565 +78 09 37.40 – V C57
2019-12-27 22:14:23 s 1 +81997.010 0 +332327.53 5390.0 – C57
2019-12-27 22:44:23 S 08 26 52.699 +78 10 08.22 – V C57
2019-12-27 22:44:23 s 1 +81128.079 0 +333489.06 2950.0 – C57
2019-12-27 23:14:23 S 08 26 43.375 +78 10 43.07 – V C57
2019-12-27 23:14:23 s 1 +80256.524 0 +334640.19 1390.0 – C57
2019-12-27 23:44:23 S 08 26 35.213 +78 11 12.98 – V C57
2019-12-27 23:44:23 s 1 +79382.392 0 +335780.97 830.0 – C57
2019-12-28 00:14:23 S 08 26 26.683 +78 11 44.16 – V C57
2019-12-28 00:14:23 s 1 +78505.730 0 +336911.43 1380.0 – C57
2019-12-28 00:44:23 S 08 26 17.707 +78 12 16.13 – V 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)