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
2019-06-22 19:14:30 s 1 +99317.509 0 +310693.03 3930.0 – C57
2019-06-22 19:44:30 S 06 36 25.963 -81 50 37.61 – V C57
2019-06-22 19:44:30 s 1 +98439.962 0 +312012.41 1360.0 – C57
2019-06-22 20:44:30 S 06 36 39.497 -81 46 53.29 – V C57
2019-06-22 20:44:30 s 1 +96674.411 0 +314618.82 530.0 – C57
2019-06-22 21:14:30 S 06 36 46.438 -81 45 03.89 – V C57
2019-06-22 21:14:30 s 1 +95786.523 0 +315905.93 2790.0 – C57
2019-06-22 21:44:30 S 06 36 52.574 -81 43 17.47 – V C57
2019-06-22 21:44:30 s 1 +94895.303 0 +317182.36 3860.0 – C57
2019-06-23 00:14:30 S 06 37 25.584 -81 34 03.25 – V C57
2019-06-23 00:14:30 s 1 +90391.163 0 +323405.93 30.0 – C57
2019-06-23 00:44:30 S 06 37 31.759 -81 32 11.47 – V C57
2019-06-23 00:44:30 s 1 +89481.102 0 +324619.22 9140.0 – C57
2019-06-23 01:14:30 S 06 37 37.553 -81 30 31.36 – V C57
2019-06-23 01:14:30 s 1 +88568.086 0 +325822.12 8750.0 – C57
2019-06-23 01:44:30 S 06 37 44.518 -81 28 31.58 – V C57
2019-06-23 01:44:30 s 1 +87652.165 0 +327014.68 9110.0 – C57
2019-06-23 02:14:30 S 06 37 50.124 -81 26 46.64 – V C57
2019-06-23 02:14:30 s 1 +86733.388 0 +328196.94 440.0 – C57
2019-06-23 02:44:30 S 06 37 56.438 -81 24 55.08 – V C57
2019-06-23 02:44:30 s 1 +85811.806 0 +329368.94 2970.0 – C57
2019-06-23 03:14:30 S 06 38 02.431 -81 23 07.91 – V C57
2019-06-23 03:14:30 s 1 +84887.466 0 +330530.71 6910.0 – C57
2019-06-23 03:44:30 S 06 38 08.278 -81 21 17.64 – V C57
2019-06-23 03:44:30 s 1 +83960.418 0 +331682.29 2480.0 – C57
2019-06-23 04:14:30 S 06 38 14.470 -81 19 27.16 – V C57
2019-06-23 04:14:30 s 1 +83030.707 0 +332823.72 9910.0 – C57
2019-06-23 04:44:30 S 06 38 20.606 -81 17 34.84 – V C57
2019-06-23 04:44:30 s 1 +82098.382 0 +333955.04 9390.0 – C57
2019-06-23 05:14:30 S 06 38 25.937 -81 15 51.16 – V C57
2019-06-23 05:14:30 s 1 +81163.487 0 +335076.28 1150.0 – C57
2019-06-23 05:44:30 S 06 38 32.335 -81 13 55.16 – V C57
2019-06-23 05:44:30 s 1 +80226.068 0 +336187.49 5390.0 – C57
2019-06-23 06:14:30 S 06 38 37.891 -81 12 07.20 – V C57
2019-06-23 06:14:30 s 1 +79286.171 0 +337288.69 2320.0 – C57
2019-06-23 06:44:30 S 06 38 43.495 -81 10 17.29 – V C57
2019-06-23 06:44:30 s 1 +78343.839 0 +338379.92 2130.0 – C57
2019-06-23 07:14:30 S 06 38 49.464 -81 08 29.00 – V C57
2019-06-23 07:14:30 s 1 +77399.117 0 +339461.21 5020.0 – C57
2019-06-23 07:44:30 S 06 38 55.013 -81 06 38.74 – V C57
2019-06-23 07:44:30 s 1 +76452.046 0 +340532.61 1200.0 – C57
2019-06-23 08:14:30 S 06 39 00.334 -81 04 53.04 – V C57
2019-06-23 08:14:30 s 1 +75502.671 0 +341594.15 860.0 – C57
2019-06-23 08:44:30 S 06 39 06.665 -81 02 53.70 – V C57
2019-06-23 08:44:30 s 1 +74551.032 0 +342645.85 4180.0 – C57
2019-06-23 09:14:30 S 06 39 11.570 -81 01 12.29 – V C57
2019-06-23 09:14:30 s 1 +73597.172 0 +343687.76 1370.0 – C57
2019-06-23 09:44:30 S 06 39 17.220 -80 59 17.38 – V C57
2019-06-23 09:44:30 s 1 +72641.131 0 +344719.90 2590.0 – C57
2019-06-23 10:14:30 S 06 39 22.771 -80 57 32.22 – 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)