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
2022-07-24 05:33:27 C 19 30 10.985 -43 31 54.48 V W68
2022-07-25 21:56:27 C 19 24 08.287 -43 43 11.46 V M22
2022-07-25 22:01:09 C 19 24 07.560 -43 43 12.94 V M22
2022-07-25 22:09:15 C 19 24 06.278 -43 43 15.02 V M22
2022-07-25 22:26:12 C 19 24 03.751 -43 43 19.09 V M22
2022-07-28 04:27:13 C 19 16 10.289 -43 54 48.28 V W68
2022-07-28 04:31:46 C 19 16 09.578 -43 54 49.72 V W68
2022-07-28 04:39:34 C 19 16 08.458 -43 54 51.01 V W68
2022-07-28 04:54:52 C 19 16 06.175 -43 54 53.17 V W68
2022-08-01 04:28:16 C 19 02 52.404 -44 05 50.24 V W68
2022-08-01 04:32:14 C 19 02 51.790 -44 05 50.24 V W68
2022-08-01 04:39:55 C 19 02 50.755 -44 05 50.06 V W68
2022-08-01 04:54:21 C 19 02 48.850 -44 05 51.14 V W68
2023-04-20 09:29:02 C 21 46 17.047 -11 35 07.58 V W68
2023-04-20 09:37:00 C 21 46 17.052 -11 35 11.22 V W68
2023-04-20 09:57:02 C 21 46 17.162 -11 35 21.59 V W68
2023-04-20 10:04:22 C 21 46 17.177 -11 35 25.30 V W68
2023-04-29 09:42:47 C 21 47 05.880 -13 28 25.93 V W68
2023-04-29 09:48:40 C 21 47 05.863 -13 28 29.14 V W68
2023-04-29 09:55:52 C 21 47 05.868 -13 28 33.64 V W68
2023-04-29 10:07:46 C 21 47 05.861 -13 28 41.02 V W68
2023-05-02 09:14:17 C 21 47 00.456 -14 08 57.44 V W68
2023-05-02 09:18:14 C 21 47 00.444 -14 09 00.61 V W68
2023-05-02 09:28:01 C 21 47 00.401 -14 09 05.76 V W68
2023-05-02 09:35:20 C 21 47 00.362 -14 09 10.15 V W68
2023-05-03 07:56:05 C 21 46 55.800 -14 22 14.59 V W68
2023-05-03 08:00:09 C 21 46 55.807 -14 22 17.33 V W68
2023-05-03 08:08:22 C 21 46 55.822 -14 22 23.09 V W68
2023-05-03 08:23:00 C 21 46 55.622 -14 22 32.20 V W68
2023-05-04 03:00:38 C 21 46 50.364 -14 33 36.32 V M22
2023-05-04 03:05:14 C 21 46 50.326 -14 33 39.64 V M22
2023-05-04 03:13:18 C 21 46 50.273 -14 33 44.21 V M22
2023-05-04 03:30:57 C 21 46 50.153 -14 33 55.08 V M22
2023-05-14 16:16:04 S 21 43 24.73 -17 23 15.8 L C51
2023-05-14 16:16:15 S 21 43 24.61 -17 23 14.6 L C51
2023-05-14 20:56:37 S 21 43 18.08 -17 26 44.3 L C51
2023-05-15 01:37:11 S 21 43 11.34 -17 30 16.6 L C51
2023-05-15 03:10:41 S 21 43 09.02 -17 31 28.4 L C51
2023-05-15 06:17:33 S 21 43 04.48 -17 33 49.9 L C51
2023-05-15 06:17:43 S 21 43 04.54 -17 33 48.8 L C51
2023-05-21 07:31:34 C 21 38 28.094 -19 32 08.59 V W68
2023-05-21 07:34:10 C 21 38 27.958 -19 32 10.79 V W68
2023-05-21 07:38:43 C 21 38 27.775 -19 32 15.29 V W68
2023-05-21 07:53:06 C 21 38 27.166 -19 32 27.56 V W68
2023-05-22 10:56:36 C 21 37 20.251 -19 56 33.00 V 703
2023-05-22 11:02:06 C 21 37 19.978 -19 56 38.11 V 703
2023-05-22 11:07:36 C 21 37 19.783 -19 56 43.37 V 703
2023-05-22 11:13:05 C 21 37 19.488 -19 56 48.16 V 703
2023-05-25 10:55:05 C 21 33 56.358 -21 03 08.96 V 703
2023-05-25 10:55:45 C 21 33 56.401 -21 03 09.86 V 703
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)