1566 Icarus (1949 MA)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia

Orbital Elements

Epoch (TDB)	2025-11-21 (JD 2461000.5)
Eccentricity (e)	0.8270057286 ± 2.08e-08
Semi-major axis (a)	1.0780378356 AU ± 7.96e-10
Inclination (i)	22.80322165° ± 4.67e-06
Long. of Asc. Node (Ω)	87.95241860° ± 1.45e-06
Arg. of Perihelion (ω)	31.43821085° ± 2.76e-06
Mean Anomaly (M)	153.07893635° ± 3.50e-06
Mean Motion (n)	0.8805646990°/day ± 9.75e-10
Perihelion dist (q)	0.18649437 AU ± 2.24e-08
Aphelion dist (Q)	1.96958130 AU ± 2.25e-08
Orbital Period	1.11931160 yr ± 1.24e-09
NGA Model	r2
A2	-4.25335087e-15 ± 1.75e-16 AU/d²

Physical Parameters

H (abs. magnitude)	16.53
G (slope)	0.15

Orbit Solution

Source	IAA
Solution Date	2026-05-31
RMS Residual	0.450″
Uncertainty	0
Orbit Type	Apollo
MOID	0.033646 AU
Observations Used	1864
Radar Obs Used	23
Gaia Obs Used	31
Oppositions	7
Arc Total	1949-2025
First Observation Used	1949-06-27
Last Observation Used	2025-08-18

Observations (2297)

Date	Type	RA	Dec	Mag	Band	Observatory
2020-08-03 00:44:15	S	21 30 57.089	-51 10 37.96	–	V	C57
2020-08-03 00:44:15	s	1 +89318.996	0 +307515.77	1300.0	–	C57
2020-08-03 00:54:15	S	21 30 55.550	-51 10 53.76	–	V	C57
2020-08-03 00:54:15	s	1 +89022.966	0 +307955.15	40.0	–	C57
2020-08-03 01:04:15	S	21 30 54.516	-51 10 58.80	–	V	C57
2020-08-03 01:04:15	s	1 +88726.537	0 +308393.19	8700.0	–	C57
2020-08-03 01:44:15	S	21 30 46.510	-51 11 47.90	–	V	C57
2020-08-03 01:44:15	s	1 +87536.884	0 +310132.05	2440.0	–	C57
2020-08-03 01:54:15	S	21 30 45.343	-51 11 54.28	–	V	C57
2020-08-03 01:54:15	s	1 +87238.499	0 +310563.45	660.0	–	C57
2020-08-03 02:24:15	S	21 30 40.145	-51 12 24.01	–	V	C57
2020-08-03 02:24:15	s	1 +86341.049	0 +311849.70	4800.0	–	C57
2020-08-03 02:44:15	S	21 30 35.765	-51 12 54.86	–	V	C57
2020-08-03 02:44:15	s	1 +85740.861	0 +312700.63	460.0	–	C57
2020-08-03 03:04:15	S	21 30 32.474	-51 13 08.22	–	V	C57
2020-08-03 03:04:15	s	1 +85139.185	0 +313546.30	5780.0	–	C57
2020-08-03 03:44:15	S	21 30 25.387	-51 13 54.73	–	V	C57
2020-08-03 03:44:15	s	1 +83931.442	0 +315221.98	5420.0	–	C57
2020-08-03 04:04:15	S	21 30 21.905	-51 14 25.87	–	V	C57
2020-08-03 04:04:15	s	1 +83325.412	0 +316052.02	9740.0	–	C57
2020-08-03 04:14:15	S	21 30 19.104	-51 14 29.65	–	V	C57
2020-08-03 04:14:15	s	1 +83021.866	0 +316465.10	6770.0	–	C57
2020-08-03 04:24:15	S	21 30 17.935	-51 14 38.08	–	V	C57
2020-08-03 04:24:15	s	1 +82717.968	0 +316876.88	3720.0	–	C57
2020-08-03 04:34:15	S	21 30 15.926	-51 14 58.96	–	V	C57
2020-08-03 04:34:15	s	1 +82413.720	0 +317287.38	590.0	–	C57
2020-08-03 04:54:15	S	21 30 12.564	-51 15 19.26	–	V	C57
2020-08-03 04:54:15	s	1 +81804.187	0 +318104.51	4090.0	–	C57
2020-08-03 05:04:15	S	21 30 10.214	-51 15 31.90	–	V	C57
2020-08-03 05:04:15	s	1 +81498.905	0 +318511.15	710.0	–	C57
2020-08-03 05:24:15	S	21 30 07.202	-51 15 50.18	–	V	C57
2020-08-03 05:24:15	s	1 +80887.322	0 +319320.59	3720.0	–	C57
2020-08-03 05:34:15	S	21 30 05.165	-51 16 03.18	–	V	C57
2020-08-03 05:34:15	s	1 +80581.025	0 +319723.39	100.0	–	C57
2020-08-03 05:44:15	S	21 30 03.358	-51 16 13.51	–	V	C57
2020-08-03 05:44:15	s	1 +80274.394	0 +320124.91	6400.0	–	C57
2020-08-03 05:54:15	S	21 30 01.706	-51 16 26.08	–	V	C57
2020-08-03 05:54:15	s	1 +79967.432	0 +320525.16	2620.0	–	C57
2020-08-03 06:04:15	S	21 29 59.868	-51 16 35.80	–	V	C57
2020-08-03 06:04:15	s	1 +79660.139	0 +320924.15	8770.0	–	C57
2020-08-03 06:14:15	S	21 29 57.900	-51 16 50.45	–	V	C57
2020-08-03 06:14:15	s	1 +79352.519	0 +321321.86	4830.0	–	C57
2020-08-03 06:44:15	S	21 29 52.442	-51 17 15.07	–	V	C57
2020-08-03 06:44:15	s	1 +78427.713	0 +322507.40	2540.0	–	C57
2020-08-03 07:24:15	S	21 29 45.089	-51 17 59.10	–	V	C57
2020-08-03 07:24:15	s	1 +77190.177	0 +324070.48	5050.0	–	C57
2020-08-03 08:14:15	S	21 29 36.350	-51 18 58.75	–	V	C57
2020-08-03 08:14:15	s	1 +75636.269	0 +325996.14	1450.0	–	C57
2020-08-03 08:34:15	S	21 29 32.813	-51 19 16.43	–	V	C57
2020-08-03 08:34:15	s	1 +75012.583	0 +326757.69	1470.0	–	C57

« Prev 1 2 … 35 36 37 … 45 46 Next » 2297 observations

Radar Observations (40)

Epoch (UTC)	Value	Sigma	Units	Freq (MHz)	Receiver	Transmitter
1968-06-14 05:30:00	115417.1	3	Hz	2388	-14	-13
1968-06-14 19:00:00	50487.7	4	Hz	7840	-2	-2
1968-06-14 22:20:00	-10324.1	3	Hz	2388	-14	-13
1968-06-14.229167	11541710	100	Hz	2388	252	253
1968-06-14.791667	5048770	400	Hz	7840	254	254
1968-06-14.930556	-1032410	100	Hz	2388	252	253
1968-06-15 03:00:00	-167331.6	4	Hz	7840	-2	-2
1968-06-15 04:30:00	-61207.2	3	Hz	2388	-14	-13
1968-06-15 09:40:00	-104441.9	3	Hz	2388	-14	-13
1968-06-15.125000	-16733160	400	Hz	7840	254	254
1968-06-15.187500	-6120720	100	Hz	2388	252	253
1968-06-15.402778	-10444190	100	Hz	2388	252	253
1968-06-16 01:40:00	-202453.5	3	Hz	2388	-14	-13
1968-06-16 06:30:00	-234710	3	Hz	2388	-14	-13
1968-06-16 10:00:00	-255404.7	3	Hz	2388	-14	-13
1968-06-16.069444	-20245350	100	Hz	2388	252	253
1968-06-16.270833	-23471000	100	Hz	2388	252	253
1968-06-16.416667	-25540470	100	Hz	2388	252	253
1996-06-08 14:00:00	560070	10	Hz	8510	-14	-14
1996-06-08.583333	56007000	1000	Hz	8510	253	253
1996-06-10 14:00:00	153114	10	Hz	8510	-14	-14
1996-06-10.583333	15311400	1000	Hz	8510	253	253
2015-06-13 23:50:00	1123284.559	5	Hz	8560	-14	-14
2015-06-14 00:30:00	70583814.78	20	us	8560	-14	-14
2015-06-14 01:10:00	70272229.12	3	us	8560	-14	-14
2015-06-14 23:30:00	822302.025	5	Hz	8560	-14	-14
2015-06-15 00:00:00	60903291.94	2.5	us	8560	-14	-14
2015-06-16 23:20:00	53984215.88	2.5	us	8560	-14	-14
2015-06-18 00:02:00	58591220.063	0.4	us	2380	-1	-1
2015-06-18 00:58:00	58866141.404	0.4	us	2380	-1	-1
2015-06-18 23:41:00	67308377.46	1	us	2380	-1	-1
2015-06-18.001389	585912200630	4000	us	2380	251	251
2015-06-18.040278	588661414040	4000	us	2380	251	251
2015-06-18.986806	673083774600	10000	us	2380	251	251
2015-06-19 01:37:00	68163275.576	1	us	2380	-1	-1
2015-06-19.067361	681632755760	10000	us	2380	251	251
2015-06-20 00:58:00	79708409.313	2	us	2380	-1	-1
2015-06-20 01:33:00	80022300.658	2	us	2380	-1	-1
2015-06-20.040278	797084093130	20000	us	2380	251	251
2015-06-20.064583	800223006580	20000	us	2380	251	251

Station codes

-14 DSS-14 Goldstone (70-m) -13 DSS-13 Goldstone (34-m) -2 Haystack (37-m) -1 Arecibo (305-m, 1963–2020)