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 17:04:15	S	21 32 20.594	-51 02 00.78	–	V	C57
2020-08-02 17:04:15	s	1 +102458.80	4 +285816.12	8530.0	–	C57
2020-08-02 17:14:15	S	21 32 18.031	-51 02 12.19	–	V	C57
2020-08-02 17:14:15	s	1 +102184.09	6 +286319.73	1670.0	–	C57
2020-08-02 17:34:15	S	21 32 13.927	-51 02 37.36	–	V	C57
2020-08-02 17:34:15	s	1 +101633.08	8 +287322.59	7640.0	–	C57
2020-08-02 17:44:15	S	21 32 12.730	-51 02 49.34	–	V	C57
2020-08-02 17:44:15	s	1 +101356.79	5 +287821.84	470.0	–	C57
2020-08-02 17:54:15	S	21 32 11.273	-51 02 53.77	–	V	C57
2020-08-02 17:54:15	s	1 +101079.97	9 +288319.64	3200.0	–	C57
2020-08-02 18:24:15	S	21 32 05.926	-51 03 28.08	–	V	C57
2020-08-02 18:24:15	s	1 +100246.43	4 +289804.37	780.0	–	C57
2020-08-02 18:34:15	S	21 32 03.773	-51 03 47.92	–	V	C57
2020-08-02 18:34:15	s	1 +99967.563	0 +290296.40	3100.0	–	C57
2020-08-02 18:44:15	S	21 32 02.057	-51 03 59.51	–	V	C57
2020-08-02 18:44:15	s	1 +99688.187	0 +290787.00	5320.0	–	C57
2020-08-02 18:54:15	S	21 32 00.055	-51 04 06.35	–	V	C57
2020-08-02 18:54:15	s	1 +99408.307	0 +291276.16	7440.0	–	C57
2020-08-02 19:04:15	S	21 31 58.298	-51 04 18.41	–	V	C57
2020-08-02 19:04:15	s	1 +99127.929	0 +291763.90	9470.0	–	C57
2020-08-02 19:24:15	S	21 31 54.293	-51 04 38.82	–	V	C57
2020-08-02 19:24:15	s	1 +98565.685	0 +292735.10	3210.0	–	C57
2020-08-02 19:34:15	S	21 31 52.589	-51 04 52.86	–	V	C57
2020-08-02 19:34:15	s	1 +98283.826	0 +293218.56	4940.0	–	C57
2020-08-02 19:54:15	S	21 31 49.728	-51 05 12.44	–	V	C57
2020-08-02 19:54:15	s	1 +97718.651	0 +294181.24	8090.0	–	C57
2020-08-02 20:04:15	S	21 31 48.358	-51 05 20.94	–	V	C57
2020-08-02 20:04:15	s	1 +97435.340	0 +294660.46	9520.0	–	C57
2020-08-02 20:44:15	S	21 31 40.562	-51 06 07.78	–	V	C57
2020-08-02 20:44:15	s	1 +96297.345	0 +296563.27	4280.0	–	C57
2020-08-02 21:04:15	S	21 31 37.200	-51 06 31.90	–	V	C57
2020-08-02 21:04:15	s	1 +95725.538	0 +297506.27	6080.0	–	C57
2020-08-02 21:24:15	S	21 31 33.077	-51 06 57.20	–	V	C57
2020-08-02 21:24:15	s	1 +95151.889	0 +298443.70	7500.0	–	C57
2020-08-02 21:44:15	S	21 31 29.777	-51 07 21.18	–	V	C57
2020-08-02 21:44:15	s	1 +94576.421	0 +299375.56	8540.0	–	C57
2020-08-02 22:44:15	S	21 31 19.284	-51 08 23.28	–	V	C57
2020-08-02 22:44:15	s	1 +92839.328	0 +302138.05	9420.0	–	C57
2020-08-02 22:54:15	S	21 31 16.968	-51 08 26.95	–	V	C57
2020-08-02 22:54:15	s	1 +92548.283	0 +302593.66	9240.0	–	C57
2020-08-02 23:04:15	S	21 31 15.588	-51 08 45.67	–	V	C57
2020-08-02 23:04:15	s	1 +92256.808	0 +303047.90	8970.0	–	C57
2020-08-02 23:54:15	S	21 31 06.343	-51 09 43.06	–	V	C57
2020-08-02 23:54:15	s	1 +90793.077	0 +305298.72	6260.0	–	C57
2020-08-03 00:04:15	S	21 31 04.613	-51 09 56.41	–	V	C57
2020-08-03 00:04:15	s	1 +90499.079	0 +305744.82	5450.0	–	C57
2020-08-03 00:14:15	S	21 31 03.043	-51 10 12.18	–	V	C57
2020-08-03 00:14:15	s	1 +90204.669	0 +306189.58	4540.0	–	C57
2020-08-03 00:34:15	S	21 30 59.220	-51 10 27.16	–	V	C57
2020-08-03 00:34:15	s	1 +89614.625	0 +307075.05	2470.0	–	C57

« Prev 1 2 … 34 35 36 … 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)