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
2020-01-04 21:14:23 S 07 16 24.686 +80 15 59.87 – V C57
2020-01-04 21:14:23 s 1 -199176.10 2 +170779.35 9330.0 – C57
2020-01-04 21:44:23 S 07 16 12.266 +80 16 06.67 – V C57
2020-01-04 21:44:23 s 1 -199020.22 7 +168675.16 7810.0 – C57
2020-01-04 22:14:23 S 07 16 00.391 +80 16 13.33 – V C57
2020-01-04 22:14:23 s 1 -198850.23 1 +166558.98 2750.0 – C57
2020-01-04 22:44:23 S 07 15 47.784 +80 16 21.47 – V C57
2020-01-04 22:44:23 s 1 -198665.88 7 +164430.77 3750.0 – C57
2020-01-04 23:14:23 S 07 15 35.858 +80 16 28.20 – V C57
2020-01-04 23:14:23 s 1 -198466.96 0 +162290.46 350.0 – C57
2020-01-04 23:44:23 S 07 15 23.659 +80 16 34.86 – V C57
2020-01-04 23:44:23 s 1 -198253.20 8 +160138.00 2120.0 – C57
2020-01-05 00:14:23 S 07 15 11.546 +80 16 41.23 – V C57
2020-01-05 00:14:23 s 1 -198024.38 6 +157973.35 8600.0 – C57
2020-01-05 00:44:23 S 07 14 59.333 +80 16 47.57 – V C57
2020-01-05 00:44:23 s 1 -197780.23 9 +155796.46 9330.0 – C57
2020-01-05 01:14:23 S 07 14 47.213 +80 16 54.80 – V C57
2020-01-05 01:14:23 s 1 -197520.50 8 +153607.27 3820.0 – C57
2020-01-05 01:44:23 S 07 14 35.069 +80 17 01.75 – V C57
2020-01-05 01:44:23 s 1 -197244.92 7 +151405.73 1570.0 – C57
2020-01-05 02:14:23 S 07 14 22.834 +80 17 07.98 – V C57
2020-01-05 02:14:23 s 1 -196953.22 1 +149191.79 2080.0 – C57
2020-01-05 02:44:23 S 07 14 10.814 +80 17 13.81 – V C57
2020-01-05 02:44:23 s 1 -196645.11 2 +146965.41 4840.0 – C57
2020-01-05 03:14:23 S 07 13 58.610 +80 17 19.97 – V C57
2020-01-05 03:14:23 s 1 -196320.30 9 +144726.53 9290.0 – C57
2020-01-05 03:44:23 S 07 13 46.510 +80 17 26.05 – V C57
2020-01-05 03:44:23 s 1 -195978.51 8 +142475.11 4890.0 – C57
2020-01-05 04:14:23 S 07 13 34.476 +80 17 32.93 – V C57
2020-01-05 04:14:23 s 1 -195619.43 4 +140211.10 1060.0 – C57
2020-01-05 04:44:23 S 07 13 22.190 +80 17 39.12 – V C57
2020-01-05 04:44:23 s 1 -195242.74 5 +137934.44 7240.0 – C57
2020-01-05 05:14:23 S 07 13 10.255 +80 17 44.77 – V C57
2020-01-05 05:14:23 s 1 -194848.13 0 +135645.10 2810.0 – C57
2020-01-05 05:44:23 S 07 12 57.881 +80 17 50.50 – V C57
2020-01-05 05:44:23 s 1 -194435.25 9 +133343.04 7150.0 – C57
2020-01-05 06:14:23 S 07 12 46.193 +80 17 56.22 – V C57
2020-01-05 06:14:23 s 1 -194003.79 2 +131028.20 9630.0 – C57
2020-01-05 06:44:23 S 07 12 33.943 +80 18 01.69 – V C57
2020-01-05 06:44:23 s 1 -193553.38 0 +128700.55 9600.0 – C57
2020-01-05 07:14:23 S 07 12 21.826 +80 18 08.21 – V C57
2020-01-05 07:14:23 s 1 -193083.66 4 +126360.04 6360.0 – C57
2020-01-05 07:44:23 S 07 12 09.881 +80 18 14.04 – V C57
2020-01-05 07:44:23 s 1 -192594.27 5 +124006.63 9240.0 – C57
2020-01-05 08:14:23 S 07 11 57.511 +80 18 19.58 – V C57
2020-01-05 08:14:23 s 1 -192084.83 2 +121640.30 7490.0 – C57
2020-01-05 08:44:23 S 07 11 45.816 +80 18 24.37 – V C57
2020-01-05 08:44:23 s 1 -191554.94 4 +119261.00 400.0 – C57
2020-01-05 09:14:23 S 07 11 33.854 +80 18 29.63 – V C57
2020-01-05 09:14:23 s 1 -191004.20 6 +116868.70 7190.0 – 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)