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 02:24:15	S	21 39 14.532	-50 17 33.25	–	V	C57
2020-08-01 02:24:15	s	1 +139721.34	4 +120987.42	6980.0	–	C57
2020-08-01 02:34:15	S	21 39 13.049	-50 17 45.85	–	V	C57
2020-08-01 02:34:15	s	1 +139764.12	7 +121952.17	6530.0	–	C57
2020-08-01 02:44:15	S	21 39 11.429	-50 17 51.97	–	V	C57
2020-08-01 02:44:15	s	1 +139803.76	4 +122914.17	5660.0	–	C57
2020-08-01 03:24:15	S	21 39 04.171	-50 18 40.18	–	V	C57
2020-08-01 03:24:15	s	1 +139931.48	4 +126734.95	8190.0	–	C57
2020-08-01 03:34:15	S	21 39 02.287	-50 18 52.63	–	V	C57
2020-08-01 03:34:15	s	1 +139955.86	5 +127683.38	5340.0	–	C57
2020-08-01 03:44:15	S	21 39 00.600	-50 19 00.08	–	V	C57
2020-08-01 03:44:15	s	1 +139977.28	8 +128629.11	2100.0	–	C57
2020-08-01 03:54:15	S	21 38 58.318	-50 19 16.61	–	V	C57
2020-08-01 03:54:15	s	1 +139995.78	3 +129572.16	8480.0	–	C57
2020-08-01 04:04:15	S	21 38 56.287	-50 19 26.58	–	V	C57
2020-08-01 04:04:15	s	1 +140011.37	9 +130512.54	4470.0	–	C57
2020-08-01 04:14:15	S	21 38 55.550	-50 19 41.38	–	V	C57
2020-08-01 04:14:15	s	1 +140024.10	5 +131450.25	90.0	–	C57
2020-08-01 04:34:15	S	21 38 51.360	-50 20 07.19	–	V	C57
2020-08-01 04:34:15	s	1 +140041.06	2 +133317.69	220.0	–	C57
2020-08-01 04:44:15	S	21 38 49.037	-50 20 20.62	–	V	C57
2020-08-01 04:44:15	s	1 +140045.35	0 +134247.44	4730.0	–	C57
2020-08-01 04:54:15	S	21 38 47.700	-50 20 26.56	–	V	C57
2020-08-01 04:54:15	s	1 +140046.88	0 +135174.56	8870.0	–	C57
2020-08-01 05:04:15	S	21 38 45.427	-50 20 47.40	–	V	C57
2020-08-01 05:04:15	s	1 +140045.68	1 +136099.05	2660.0	–	C57
2020-08-01 05:14:15	S	21 38 44.304	-50 20 52.30	–	V	C57
2020-08-01 05:14:15	s	1 +140041.77	8 +137020.92	6090.0	–	C57
2020-08-01 05:24:15	S	21 38 42.101	-50 21 04.46	–	V	C57
2020-08-01 05:24:15	s	1 +140035.19	8 +137940.18	9170.0	–	C57
2020-08-01 05:34:15	S	21 38 40.308	-50 21 17.03	–	V	C57
2020-08-01 05:34:15	s	1 +140025.96	8 +138856.84	1900.0	–	C57
2020-08-01 05:44:15	S	21 38 39.000	-50 21 26.64	–	V	C57
2020-08-01 05:44:15	s	1 +140014.11	2 +139770.90	4280.0	–	C57
2020-08-01 06:04:15	S	21 38 35.237	-50 21 50.83	–	V	C57
2020-08-01 06:04:15	s	1 +139982.62	7 +141591.28	8010.0	–	C57
2020-08-01 06:24:15	S	21 38 31.320	-50 22 19.63	–	V	C57
2020-08-01 06:24:15	s	1 +139940.94	3 +143401.36	390.0	–	C57
2020-08-01 06:34:15	S	21 38 29.378	-50 22 22.15	–	V	C57
2020-08-01 06:34:15	s	1 +139916.33	6 +144302.57	1080.0	–	C57
2020-08-01 06:44:15	S	21 38 28.550	-50 22 42.64	–	V	C57
2020-08-01 06:44:15	s	1 +139889.25	2 +145201.23	1440.0	–	C57
2020-08-01 07:24:15	S	21 38 20.942	-50 23 23.21	–	V	C57
2020-08-01 07:24:15	s	1 +139756.60	5 +148770.57	9640.0	–	C57
2020-08-01 07:44:15	S	21 38 16.738	-50 23 48.16	–	V	C57
2020-08-01 07:44:15	s	1 +139676.01	1 +150540.16	6830.0	–	C57
2020-08-01 07:54:15	S	21 38 15.509	-50 24 02.09	–	V	C57
2020-08-01 07:54:15	s	1 +139632.22	4 +151421.22	4960.0	–	C57
2020-08-01 08:04:15	S	21 38 13.778	-50 24 12.82	–	V	C57
2020-08-01 08:04:15	s	1 +139586.13	9 +152299.79	2780.0	–	C57

« Prev 1 2 … 29 30 31 … 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)