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 Period1.11931160 yr ± 1.24e-09
NGA Modelr2
A2-4.25335087e-15 ± 1.75e-16 AU/d²
Physical Parameters
H (abs. magnitude)16.53
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.450″
Uncertainty0
Orbit TypeApollo
MOID0.033646 AU
Observations Used1864
Radar Obs Used23
Gaia Obs Used31
Oppositions7
Arc Total1949-2025
First Observation Used1949-06-27
Last Observation Used2025-08-18
Observations (2297)
Date Type RA Dec Mag Band Observatory
2024-07-30 02:43:31 C 16 24 09.478 -32 31 26.54 V W68
2024-08-01 19:17:32 C 16 23 56.383 -32 27 57.74 V M22
2024-08-01 19:22:18 C 16 23 56.393 -32 27 57.31 V M22
2024-08-01 19:30:13 C 16 23 56.371 -32 27 57.46 V M22
2024-08-01 19:44:26 C 16 23 56.299 -32 27 56.30 V M22
2025-07-02 06:08:19 C 10 32 20.196 +19 30 07.85 V T05
2025-07-02 06:14:11 C 10 32 23.162 +19 29 45.10 V T05
2025-07-02 06:18:06 C 10 32 25.130 +19 29 29.76 V T05
2025-07-02 06:49:37 C 10 32 41.021 +19 27 27.00 V T05
2025-07-06 22:56:42 C 11 26 15.607 +11 51 31.39 V W68
2025-07-06 23:02:01 C 11 26 17.947 +11 51 09.43 V W68
2025-07-06 23:15:08 C 11 26 23.746 +11 50 14.50 V W68
2025-07-06 23:43:25 C 11 26 36.161 +11 48 17.10 V W68
2025-07-08 17:09:09 C 11 44 27.929 +08 58 04.15 V M22
2025-07-08 17:31:23 C 11 44 37.078 +08 56 33.94 V M22
2025-07-08 17:43:47 C 11 44 42.197 +08 55 42.74 V M22
2025-07-08 17:45:06 C 11 44 42.694 +08 55 37.42 V M22
2025-07-12 06:26:09 C 12 17 36.132 +03 26 17.70 V T05
2025-07-12 06:30:44 C 12 17 37.788 +03 26 00.60 V T05
2025-07-12 06:38:42 C 12 17 40.615 +03 25 31.40 V T05
2025-07-12 06:59:19 C 12 17 47.995 +03 24 15.44 V T05
2025-07-14 06:43:01 C 12 34 15.324 +00 35 28.72 V T08
2025-07-14 06:47:40 C 12 34 16.855 +00 35 13.09 V T08
2025-07-14 06:55:40 C 12 34 19.447 +00 34 46.24 V T08
2025-07-14 07:11:40 C 12 34 24.694 +00 33 51.73 V T08
2025-07-16 06:58:20 C 12 49 29.230 -02 01 07.07 V T05
2025-07-16 07:03:02 C 12 49 30.650 -02 01 21.83 V T05
2025-07-16 07:11:39 C 12 49 33.252 -02 01 48.72 V T05
2025-07-16 07:28:12 C 12 49 38.189 -02 02 39.52 V T05
2025-07-18 23:36:18 C 13 07 53.592 -05 08 18.78 V W68
2025-07-18 23:41:32 C 13 07 54.972 -05 08 32.78 V W68
2025-07-18 23:57:58 C 13 07 59.309 -05 09 17.10 V W68
2025-07-21 06:43:45 C 13 21 58.675 -07 29 13.09 V T05
2025-07-21 06:54:48 C 13 22 01.334 -07 29 39.41 V T05
2025-07-21 07:05:34 C 13 22 03.924 -07 30 05.22 V T05
2025-07-21 07:12:53 C 13 22 05.678 -07 30 22.54 V T05
2025-07-22 23:41:18 C 13 31 36.835 -09 03 06.48 V W68
2025-07-23 00:05:41 C 13 31 42.322 -09 03 59.87 V W68
2025-07-23 00:10:14 C 13 31 43.349 -09 04 09.98 V W68
2025-07-23 00:22:17 C 13 31 46.025 -09 04 36.23 V W68
2025-07-28 17:39:16 C 13 59 44.794 -13 24 45.36 V M22
2025-07-28 17:43:50 C 13 59 45.595 -13 24 52.78 V M22
2025-07-28 17:51:40 C 13 59 47.023 -13 25 05.45 V M22
2025-08-18 01:00:35 C 15 07 54.422 -22 02 31.38 V W68
2025-08-18 01:10:33 C 15 07 55.462 -22 02 37.72 V W68
2025-08-18 01:20:30 C 15 07 56.614 -22 02 44.77 V W68
2025-08-18 01:30:27 C 15 07 57.694 -22 02 52.26 V W68
Radar Observations (40)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
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)