1866 Sisyphus — IAA Minor Planet Database

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 Period	2.60527700 yr ± 9.28e-10

Physical Parameters

H (abs. magnitude)	12.48
G (slope)	0.15

Orbit Solution

Source	IAA
Solution Date	2026-05-31
RMS Residual	0.220″
Uncertainty	0
Orbit Type	Apollo
MOID	0.102869 AU
Observations Used	9210
Radar Obs Used	1
Gaia Obs Used	79
Oppositions	38
Arc Total	1955-2026
First Observation Used	1955-01-26
Last Observation Used	2026-04-06

Observations (11960)

Date	Type	RA	Dec	Mag	Band	Observatory
2020-01-12 21:14:23	s	1 -22677.538	0 +405345.33	50.0	–	C57
2020-01-12 21:44:23	S	06 05 39.667	+80 29 39.84	–	V	C57
2020-01-12 21:44:23	s	1 -23696.645	0 +405586.88	7580.0	–	C57
2020-01-12 22:14:23	S	06 05 29.410	+80 29 34.01	–	V	C57
2020-01-12 22:14:23	s	1 -24715.361	0 +405820.55	3110.0	–	C57
2020-01-12 22:44:23	S	06 05 18.677	+80 29 28.39	–	V	C57
2020-01-12 22:44:23	s	1 -25733.667	0 +406046.35	6680.0	–	C57
2020-01-12 23:14:23	S	06 05 08.448	+80 29 22.78	–	V	C57
2020-01-12 23:14:23	s	1 -26751.543	0 +406264.30	8320.0	–	C57
2020-01-12 23:44:23	S	06 04 58.030	+80 29 16.84	–	V	C57
2020-01-12 23:44:23	s	1 -27768.969	0 +406474.41	8050.0	–	C57
2020-01-13 00:14:23	S	06 04 47.424	+80 29 11.00	–	V	C57
2020-01-13 00:14:23	s	1 -28785.926	0 +406676.69	5930.0	–	C57
2020-01-13 00:44:23	S	06 04 37.238	+80 29 05.39	–	V	C57
2020-01-13 00:44:23	s	1 -29802.393	0 +406871.16	1970.0	–	C57
2020-01-13 01:14:23	S	06 04 26.513	+80 28 59.34	–	V	C57
2020-01-13 01:14:23	s	1 -30818.352	0 +407057.83	6210.0	–	C57
2020-01-13 01:44:23	S	06 04 16.366	+80 28 53.40	–	V	C57
2020-01-13 01:44:23	s	1 -31833.783	0 +407236.70	8690.0	–	C57
2020-01-13 02:14:23	S	06 04 05.914	+80 28 47.60	–	V	C57
2020-01-13 02:14:23	s	1 -32848.667	0 +407407.80	9440.0	–	C57
2020-01-13 02:44:23	S	06 03 55.430	+80 28 41.45	–	V	C57
2020-01-13 02:44:23	s	1 -33862.984	0 +407571.12	8480.0	–	C57
2020-01-13 03:14:23	S	06 03 45.283	+80 28 35.58	–	V	C57
2020-01-13 03:14:23	s	1 -34876.715	0 +407726.69	5860.0	–	C57
2020-01-13 03:44:23	S	06 03 34.740	+80 28 29.32	–	V	C57
2020-01-13 03:44:23	s	1 -35889.841	0 +407874.51	1590.0	–	C57
2020-01-13 04:14:23	S	06 03 24.518	+80 28 23.09	–	V	C57
2020-01-13 04:14:23	s	1 -36902.343	0 +408014.60	5730.0	–	C57
2020-01-13 04:44:23	S	06 03 14.074	+80 28 17.51	–	V	C57
2020-01-13 04:44:23	s	1 -37914.202	0 +408146.96	8290.0	–	C57
2020-01-13 05:14:23	S	06 03 03.746	+80 28 10.85	–	V	C57
2020-01-13 05:14:23	s	1 -38925.398	0 +408271.60	9320.0	–	C57
2020-01-13 05:44:23	S	06 02 53.318	+80 28 04.44	–	V	C57
2020-01-13 05:44:23	s	1 -39935.914	0 +408388.55	8830.0	–	C57
2020-01-13 06:14:23	S	06 02 43.121	+80 27 58.28	–	V	C57
2020-01-13 06:14:23	s	1 -40945.729	0 +408497.79	6870.0	–	C57
2020-01-13 06:44:23	S	06 02 32.914	+80 27 51.77	–	V	C57
2020-01-13 06:44:23	s	1 -41954.826	0 +408599.35	3460.0	–	C57
2020-01-13 07:14:23	S	06 02 22.481	+80 27 45.36	–	V	C57
2020-01-13 07:14:23	s	1 -42963.185	0 +408693.24	8640.0	–	C57
2020-01-13 07:44:23	S	06 02 12.221	+80 27 38.99	–	V	C57
2020-01-13 07:44:23	s	1 -43970.787	0 +408779.47	2440.0	–	C57
2020-01-13 08:14:23	S	06 02 01.956	+80 27 32.44	–	V	C57
2020-01-13 08:14:23	s	1 -44977.615	0 +408858.03	4890.0	–	C57
2020-01-13 08:44:23	S	06 01 51.727	+80 27 25.99	–	V	C57
2020-01-13 08:44:23	s	1 -45983.649	0 +408928.95	6020.0	–	C57
2020-01-13 09:14:23	S	06 01 41.604	+80 27 19.44	–	V	C57
2020-01-13 09:14:23	s	1 -46988.870	0 +408992.24	5860.0	–	C57
2020-01-13 09:44:23	S	06 01 31.322	+80 27 12.64	–	V	C57

« Prev 1 2 … 158 159 160 … 239 240 Next » 11960 observations

Epoch (UTC)	Value	Sigma	Units	Freq (MHz)	Receiver	Transmitter
1985-12-08 00:00:00	-295248	20	Hz	2380	-1	-1
1985-12-08.000000	-29524800	2000	Hz	2380	251	251

1866 Sisyphus (1972 XA)