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
2023-06-11 06:41:26 C 11 20 51.432 +45 42 19.44 V T05
2023-06-11 06:59:05 C 11 20 51.910 +45 42 07.96 V T05
2023-06-15 06:48:02 C 11 23 36.859 +44 36 01.62 V T05
2023-06-15 06:52:53 C 11 23 36.996 +44 35 58.06 V T05
2023-06-15 07:00:23 C 11 23 37.188 +44 35 52.94 V T05
2023-06-15 07:15:38 C 11 23 37.656 +44 35 42.36 V T05
2023-06-16 21:33:28 B 11 24 47.64 +44 09 21.6 X K19
2023-06-16 21:38:40 B 11 24 47.81 +44 09 17.8 X K19
2023-06-16 21:43:52 B 11 24 47.98 +44 09 14.5 X K19
2023-06-17 06:06:11 C 11 25 03.590 +44 03 31.25 V T05
2023-06-17 06:11:13 C 11 25 03.727 +44 03 27.72 V T05
2023-06-17 06:21:03 C 11 25 04.068 +44 03 20.63 V T05
2023-06-17 06:36:50 C 11 25 04.558 +44 03 09.58 V T05
2023-06-19 06:22:36 C 11 26 35.458 +43 30 26.75 V T05
2023-06-19 06:29:01 C 11 26 35.664 +43 30 22.43 V T05
2023-06-19 06:40:31 C 11 26 36.024 +43 30 14.22 V T05
2023-06-19 06:56:40 C 11 26 36.559 +43 30 03.53 V T05
2023-06-21 06:37:45 C 11 28 10.548 +42 57 29.56 V T05
2023-06-21 06:43:16 C 11 28 10.714 +42 57 25.85 V T05
2023-06-21 06:51:52 C 11 28 10.963 +42 57 20.23 V T05
2023-06-21 07:10:11 C 11 28 11.614 +42 57 07.74 V T05
2023-06-23 06:09:31 C 11 29 47.177 +42 25 09.88 V T05
2023-06-23 06:15:21 C 11 29 47.378 +42 25 05.74 V T05
2023-06-23 06:23:47 C 11 29 47.604 +42 24 59.44 V T05
2023-06-23 06:48:45 C 11 29 48.379 +42 24 41.98 V T05
2023-06-23 06:49:24 C 11 29 48.506 +42 24 42.12 V T05
2023-06-28 04:09:36 C 11 33 58.842 +41 05 23.60 V G96
2023-06-28 04:17:48 C 11 33 59.137 +41 05 17.92 V G96
2023-06-28 04:25:59 C 11 33 59.432 +41 05 12.52 V G96
2023-06-28 04:34:10 C 11 33 59.728 +41 05 06.83 V G96
2023-07-02 07:06:32 C 11 37 41.618 +39 59 09.72 X F52
2023-07-02 07:17:34 C 11 37 42.036 +39 59 02.19 X F51
2023-07-02 07:25:58 C 11 37 42.351 +39 58 56.67 X F52
2023-07-02 07:37:08 C 11 37 42.778 +39 58 49.06 X F51
2023-07-02 07:45:26 C 11 37 43.089 +39 58 43.55 X F52
2023-07-02 07:56:43 C 11 37 43.517 +39 58 35.90 X F51
2023-07-02 08:04:53 C 11 37 43.830 +39 58 30.35 X F52
2023-07-02 08:16:18 C 11 37 44.263 +39 58 22.72 X F51
2023-07-03 07:21:57 C 11 38 37.712 +39 43 00.83 X F51
2023-07-03 07:32:52 C 11 38 38.123 +39 42 53.52 X F51
2023-07-03 07:43:46 C 11 38 38.545 +39 42 46.18 X F51
2023-07-03 07:54:41 C 11 38 38.968 +39 42 38.82 X F51
2023-07-04 06:22:19 C 11 39 31.468 +39 27 44.38 X F52
2023-07-04 06:41:58 C 11 39 32.230 +39 27 31.24 X F52
2023-07-04 07:01:40 C 11 39 32.987 +39 27 18.06 X F52
2023-07-04 07:21:24 C 11 39 33.745 +39 27 04.91 X F52
2023-07-04 07:52:53 C 11 39 34.959 +39 26 44.00 X F51
2023-07-04 08:03:46 C 11 39 35.377 +39 26 36.75 X F51
2023-07-04 08:25:31 C 11 39 36.227 +39 26 21.97 X F51
2023-07-05 06:06:38 C 11 40 27.439 +39 12 00.61 V T05
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)