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
2020-08-01 17:14:15	S	21 36 35.503	-50 34 51.35	–	V	C57
2020-08-01 17:14:15	s	1 +134041.69	2 +197017.45	660.0	–	C57
2020-08-01 17:34:15	S	21 36 31.666	-50 35 14.24	–	V	C57
2020-08-01 17:34:15	s	1 +133745.49	9 +198517.97	8020.0	–	C57
2020-08-01 17:44:15	S	21 36 29.647	-50 35 17.59	–	V	C57
2020-08-01 17:44:15	s	1 +133595.28	7 +199265.11	1400.0	–	C57
2020-08-01 17:54:15	S	21 36 28.634	-50 35 39.62	–	V	C57
2020-08-01 17:54:15	s	1 +133443.68	1 +200010.19	4570.0	–	C57
2020-08-01 18:04:15	S	21 36 26.582	-50 35 52.66	–	V	C57
2020-08-01 18:04:15	s	1 +133290.69	0 +200753.21	7550.0	–	C57
2020-08-01 18:24:15	S	21 36 23.446	-50 36 10.30	–	V	C57
2020-08-01 18:24:15	s	1 +132980.59	7 +202233.08	2890.0	–	C57
2020-08-01 18:34:15	S	21 36 20.981	-50 36 29.02	–	V	C57
2020-08-01 18:34:15	s	1 +132823.51	6 +202969.95	5270.0	–	C57
2020-08-01 18:54:15	S	21 36 17.402	-50 36 47.48	–	V	C57
2020-08-01 18:54:15	s	1 +132505.33	8 +204437.59	9440.0	–	C57
2020-08-01 19:04:15	S	21 36 15.396	-50 37 00.84	–	V	C57
2020-08-01 19:04:15	s	1 +132344.26	1 +205168.37	1230.0	–	C57
2020-08-01 19:24:15	S	21 36 12.506	-50 37 23.95	–	V	C57
2020-08-01 19:24:15	s	1 +132018.18	1 +206623.88	4240.0	–	C57
2020-08-01 19:34:15	S	21 36 10.454	-50 37 36.66	–	V	C57
2020-08-01 19:34:15	s	1 +131853.19	8 +207348.61	5460.0	–	C57
2020-08-01 20:34:15	S	21 35 59.810	-50 38 44.95	–	V	C57
2020-08-01 20:34:15	s	1 +130836.70	5 +211655.22	8830.0	–	C57
2020-08-01 20:54:15	S	21 35 56.004	-50 38 57.23	–	V	C57
2020-08-01 20:54:15	s	1 +130487.96	8 +213074.96	8480.0	–	C57
2020-08-01 21:04:15	S	21 35 54.569	-50 39 11.95	–	V	C57
2020-08-01 21:04:15	s	1 +130311.78	3 +213781.89	8030.0	–	C57
2020-08-01 21:44:15	S	21 35 47.688	-50 39 57.35	–	V	C57
2020-08-01 21:44:15	s	1 +129595.14	5 +216590.16	4460.0	–	C57
2020-08-01 21:54:15	S	21 35 45.432	-50 40 16.93	–	V	C57
2020-08-01 21:54:15	s	1 +129413.05	4 +217287.40	3130.0	–	C57
2020-08-01 22:24:15	S	21 35 40.169	-50 40 49.37	–	V	C57
2020-08-01 22:24:15	s	1 +128859.88	2 +219367.58	8080.0	–	C57
2020-08-01 22:34:15	S	21 35 38.227	-50 41 02.90	–	V	C57
2020-08-01 22:34:15	s	1 +128673.21	9 +220057.15	6050.0	–	C57
2020-08-01 22:44:15	S	21 35 36.024	-50 41 14.21	–	V	C57
2020-08-01 22:44:15	s	1 +128485.43	5 +220744.82	3860.0	–	C57
2020-08-01 22:54:15	S	21 35 35.546	-50 41 18.71	–	V	C57
2020-08-01 22:54:15	s	1 +128296.53	6 +221430.59	1490.0	–	C57
2020-08-01 23:04:15	S	21 35 33.310	-50 41 39.70	–	V	C57
2020-08-01 23:04:15	s	1 +128106.53	1 +222114.47	8950.0	–	C57
2020-08-01 23:34:15	S	21 35 28.274	-50 42 09.43	–	V	C57
2020-08-01 23:34:15	s	1 +127529.96	1 +224154.82	340.0	–	C57
2020-08-02 00:04:15	S	21 35 22.596	-50 42 37.30	–	V	C57
2020-08-02 00:04:15	s	1 +126943.71	8 +226178.32	240.0	–	C57
2020-08-02 01:34:15	S	21 35 06.048	-50 44 34.98	–	V	C57
2020-08-02 01:34:15	s	1 +125128.98	9 +232149.15	1240.0	–	C57
2020-08-02 01:44:15	S	21 35 04.493	-50 44 42.83	–	V	C57
2020-08-02 01:44:15	s	1 +124922.32	3 +232803.45	6120.0	–	C57

« Prev 1 2 … 31 32 33 … 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)