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
2020-08-02 01:54:15	S	21 35 03.413	-50 44 51.00	–	V	C57
2020-08-02 01:54:15	s	1 +124714.67	8 +233455.94	840.0	–	C57
2020-08-02 02:04:15	S	21 35 00.526	-50 45 03.67	–	V	C57
2020-08-02 02:04:15	s	1 +124506.06	0 +234106.63	5410.0	–	C57
2020-08-02 02:14:15	S	21 34 59.302	-50 45 10.84	–	V	C57
2020-08-02 02:14:15	s	1 +124296.47	5 +234755.53	9830.0	–	C57
2020-08-02 02:34:15	S	21 34 55.428	-50 45 39.89	–	V	C57
2020-08-02 02:34:15	s	1 +123874.43	4 +236047.94	8210.0	–	C57
2020-08-02 03:44:15	S	21 34 43.418	-50 46 52.68	–	V	C57
2020-08-02 03:44:15	s	1 +122367.81	6 +240515.44	2830.0	–	C57
2020-08-02 03:54:15	S	21 34 40.589	-50 47 11.47	–	V	C57
2020-08-02 03:54:15	s	1 +122148.92	7 +241146.61	5760.0	–	C57
2020-08-02 04:04:15	S	21 34 39.514	-50 47 11.76	–	V	C57
2020-08-02 04:04:15	s	1 +121929.14	3 +241776.04	8550.0	–	C57
2020-08-02 04:14:15	S	21 34 37.344	-50 47 31.81	–	V	C57
2020-08-02 04:14:15	s	1 +121708.46	9 +242403.72	1190.0	–	C57
2020-08-02 04:24:15	S	21 34 35.390	-50 47 43.44	–	V	C57
2020-08-02 04:24:15	s	1 +121486.91	2 +243029.66	3680.0	–	C57
2020-08-02 04:54:15	S	21 34 29.779	-50 48 21.42	–	V	C57
2020-08-02 04:54:15	s	1 +120816.99	9 +244897.09	320.0	–	C57
2020-08-02 05:04:15	S	21 34 29.431	-50 48 24.26	–	V	C57
2020-08-02 05:04:15	s	1 +120591.96	8 +245516.12	2250.0	–	C57
2020-08-02 05:14:15	S	21 34 27.595	-50 48 32.98	–	V	C57
2020-08-02 05:14:15	s	1 +120366.08	2 +246133.43	4040.0	–	C57
2020-08-02 05:24:15	S	21 34 25.798	-50 48 43.78	–	V	C57
2020-08-02 05:24:15	s	1 +120139.34	8 +246749.03	5690.0	–	C57
2020-08-02 05:34:15	S	21 34 23.791	-50 48 57.74	–	V	C57
2020-08-02 05:34:15	s	1 +119911.77	2 +247362.93	7200.0	–	C57
2020-08-02 05:44:15	S	21 34 21.430	-50 49 13.62	–	V	C57
2020-08-02 05:44:15	s	1 +119683.35	9 +247975.11	8570.0	–	C57
2020-08-02 06:14:15	S	21 34 16.726	-50 49 50.77	–	V	C57
2020-08-02 06:14:15	s	1 +118993.15	5 +249801.49	1870.0	–	C57
2020-08-02 06:24:15	S	21 34 14.551	-50 49 52.64	–	V	C57
2020-08-02 06:24:15	s	1 +118761.45	0 +250406.90	2700.0	–	C57
2020-08-02 06:44:15	S	21 34 11.299	-50 50 24.18	–	V	C57
2020-08-02 06:44:15	s	1 +118295.61	9 +251612.68	3950.0	–	C57
2020-08-02 07:04:15	S	21 34 06.857	-50 50 45.28	–	V	C57
2020-08-02 07:04:15	s	1 +117826.59	3 +252811.75	4660.0	–	C57
2020-08-02 07:14:15	S	21 34 05.412	-50 50 55.64	–	V	C57
2020-08-02 07:14:15	s	1 +117590.89	6 +253408.79	4820.0	–	C57
2020-08-02 07:34:15	S	21 34 02.333	-50 51 15.16	–	V	C57
2020-08-02 07:34:15	s	1 +117117.15	9 +254597.87	4740.0	–	C57
2020-08-02 07:54:15	S	21 33 58.546	-50 51 37.91	–	V	C57
2020-08-02 07:54:15	s	1 +116640.33	3 +255780.33	4130.0	–	C57
2020-08-02 08:14:15	S	21 33 54.701	-50 52 01.70	–	V	C57
2020-08-02 08:14:15	s	1 +116160.45	7 +256956.20	3010.0	–	C57
2020-08-02 08:24:15	S	21 33 53.213	-50 52 21.11	–	V	C57
2020-08-02 08:24:15	s	1 +115919.38	9 +257541.67	2250.0	–	C57
2020-08-02 08:44:15	S	21 33 49.764	-50 52 39.72	–	V	C57
2020-08-02 08:44:15	s	1 +115435.01	5 +258707.71	360.0	–	C57

« Prev 1 2 … 32 33 34 … 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)