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
2020-01-13 22:14:23	S	05 57 20.246	+80 24 13.43	–	V	C57
2020-01-13 22:14:23	s	1 -72781.128	0 +407982.68	2670.0	–	C57
2020-01-13 22:44:23	S	05 57 10.190	+80 24 05.58	–	V	C57
2020-01-13 22:44:23	s	1 -73757.469	0 +407842.67	9330.0	–	C57
2020-01-13 23:14:23	S	05 57 00.382	+80 23 58.02	–	V	C57
2020-01-13 23:14:23	s	1 -74732.485	0 +407695.22	5560.0	–	C57
2020-01-13 23:44:23	S	05 56 50.566	+80 23 50.32	–	V	C57
2020-01-13 23:44:23	s	1 -75706.158	0 +407540.33	1390.0	–	C57
2020-01-14 00:14:23	S	05 56 40.570	+80 23 42.32	–	V	C57
2020-01-14 00:14:23	s	1 -76678.470	0 +407378.01	6840.0	–	C57
2020-01-14 01:14:23	S	05 56 20.947	+80 23 26.20	–	V	C57
2020-01-14 01:14:23	s	1 -78618.934	0 +407031.09	6730.0	–	C57
2020-01-14 01:44:23	S	05 56 11.230	+80 23 17.74	–	V	C57
2020-01-14 01:44:23	s	1 -79587.051	0 +406846.50	1240.0	–	C57
2020-01-14 02:14:23	S	05 56 01.567	+80 23 10.10	–	V	C57
2020-01-14 02:14:23	s	1 -80553.732	0 +406654.50	5480.0	–	C57
2020-01-14 02:44:23	S	05 55 51.852	+80 23 02.33	–	V	C57
2020-01-14 02:44:23	s	1 -81518.961	0 +406455.08	9500.0	–	C57
2020-01-14 03:14:23	S	05 55 42.194	+80 22 54.80	–	V	C57
2020-01-14 03:14:23	s	1 -82482.718	0 +406248.26	3330.0	–	C57
2020-01-14 03:44:23	S	05 55 32.150	+80 22 46.16	–	V	C57
2020-01-14 03:44:23	s	1 -83444.985	0 +406034.03	6990.0	–	C57
2020-01-14 04:14:23	S	05 55 22.608	+80 22 38.35	–	V	C57
2020-01-14 04:14:23	s	1 -84405.743	0 +405812.41	510.0	–	C57
2020-01-14 04:44:23	S	05 55 12.619	+80 22 30.18	–	V	C57
2020-01-14 04:44:23	s	1 -85364.975	0 +405583.39	3930.0	–	C57
2020-01-14 05:14:23	S	05 55 02.904	+80 22 21.83	–	V	C57
2020-01-14 05:14:23	s	1 -86322.662	0 +405346.97	7280.0	–	C57
2020-01-14 05:44:23	S	05 54 53.407	+80 22 13.62	–	V	C57
2020-01-14 05:44:23	s	1 -87278.784	0 +405103.17	570.0	–	C57
2020-01-14 06:14:23	S	05 54 43.661	+80 22 05.05	–	V	C57
2020-01-14 06:14:23	s	1 -88233.325	0 +404851.98	3850.0	–	C57
2020-01-14 06:44:23	S	05 54 33.994	+80 21 56.63	–	V	C57
2020-01-14 06:44:23	s	1 -89186.264	0 +404593.41	7150.0	–	C57
2020-01-14 07:14:23	S	05 54 24.439	+80 21 47.99	–	V	C57
2020-01-14 07:14:23	s	1 -90137.584	0 +404327.45	490.0	–	C57
2020-01-14 07:44:23	S	05 54 14.808	+80 21 40.00	–	V	C57
2020-01-14 07:44:23	s	1 -91087.266	0 +404054.12	3900.0	–	C57
2020-01-14 08:14:23	S	05 54 05.148	+80 21 31.61	–	V	C57
2020-01-14 08:14:23	s	1 -92035.291	0 +403773.41	7420.0	–	C57
2020-01-14 08:44:23	S	05 53 55.466	+80 21 23.11	–	V	C57
2020-01-14 08:44:23	s	1 -92981.641	0 +403485.33	1080.0	–	C57
2020-01-14 09:14:23	S	05 53 45.912	+80 21 14.69	–	V	C57
2020-01-14 09:14:23	s	1 -93926.296	0 +403189.87	4900.0	–	C57
2020-01-14 09:44:23	S	05 53 36.194	+80 21 06.23	–	V	C57
2020-01-14 09:44:23	s	1 -94869.238	0 +402887.05	8920.0	–	C57
2020-01-14 10:14:23	S	05 53 26.664	+80 20 57.77	–	V	C57
2020-01-14 10:14:23	s	1 -95810.448	0 +402576.86	3160.0	–	C57
2020-01-14 10:44:23	S	05 53 16.961	+80 20 48.70	–	V	C57
2020-01-14 10:44:23	s	1 -96749.907	0 +402259.30	7660.0	–	C57

« Prev 1 2 … 160 161 162 … 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)