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
2023-05-25 10:59:50 C 21 33 56.171 -21 03 13.03 V 703
2023-05-25 11:00:29 C 21 33 56.128 -21 03 13.68 V 703
2023-05-25 11:04:35 C 21 33 55.912 -21 03 17.17 V 703
2023-05-25 11:05:14 C 21 33 55.948 -21 03 19.01 V 703
2023-05-25 11:09:19 C 21 33 55.678 -21 03 22.43 V 703
2023-05-25 11:09:58 C 21 33 55.688 -21 03 21.89 V 703
2023-05-29 02:29:20 C 21 28 53.381 -22 29 48.62 V M22
2023-05-29 02:33:45 C 21 28 53.122 -22 29 52.62 V M22
2023-05-29 02:38:04 C 21 28 52.826 -22 29 57.30 V M22
2023-05-29 03:08:30 C 21 28 50.808 -22 30 28.62 V M22
2023-06-02 10:03:49 C 21 21 28.804 -24 20 39.34 V 703
2023-06-02 10:07:39 C 21 21 28.505 -24 20 42.86 V 703
2023-06-02 10:11:28 C 21 21 28.170 -24 20 47.36 V 703
2023-06-02 10:15:18 C 21 21 27.853 -24 20 51.25 V 703
2023-06-11 06:37:00 C 21 00 41.834 -28 29 10.72 V W68
2023-06-11 06:40:54 C 21 00 41.357 -28 29 15.76 V W68
2023-06-11 06:48:27 C 21 00 40.469 -28 29 24.94 V W68
2023-06-13 03:35:09 C 20 55 15.17 -29 24 11.0 V Z17
2023-06-13 03:38:23 C 20 55 14.80 -29 24 15.7 V Z17
2023-06-13 03:41:37 C 20 55 14.37 -29 24 18.2 V Z17
2023-06-14 05:59:43 C 20 51 53.129 -29 56 15.54 V W68
2023-06-14 06:47:52 C 20 51 46.670 -29 57 14.87 V W68
2023-06-14 06:55:09 C 20 51 45.737 -29 57 23.54 V W68
2023-06-16 12:55:32 C 20 44 27.296 -31 03 18.61 X F51
2023-06-16 13:17:54 C 20 44 24.069 -31 03 45.79 X F51
2023-06-16 13:29:00 C 20 44 22.479 -31 03 59.19 X F51
2023-06-20 10:59:00 C 20 30 29.478 -32 55 17.34 X F52
2023-06-20 11:14:40 C 20 30 26.969 -32 55 35.74 X F52
2023-06-20 11:46:00 C 20 30 21.955 -32 56 12.42 X F52
2023-06-23 05:51:48 C 20 19 39.91 -34 10 59.2 q X74
2023-06-23 05:56:32 C 20 19 39.09 -34 11 04.5 q X74
2023-06-23 06:01:22 C 20 19 38.26 -34 11 09.9 q X74
2023-06-30 21:16:52 C 19 47 12.257 -37 10 16.50 V M22
2023-06-30 21:20:54 C 19 47 11.455 -37 10 20.42 V M22
2023-06-30 21:28:46 C 19 47 10.003 -37 10 27.12 V M22
2023-06-30 22:04:37 C 19 47 03.252 -37 10 57.47 V M22
2023-07-01 21:46:16 C 19 42 40.430 -37 30 09.54 V M22
2023-07-01 21:48:13 C 19 42 40.058 -37 30 11.34 V M22
2023-07-01 21:52:24 C 19 42 39.240 -37 30 14.94 V M22
2023-07-01 21:59:58 C 19 42 37.819 -37 30 21.56 V M22
2023-07-13 22:14:01 C 18 50 28.054 -39 59 53.56 V M22
2023-07-13 22:22:16 C 18 50 26.645 -39 59 55.79 V M22
2023-07-13 23:08:10 C 18 50 18.756 -40 00 07.02 V M22
2023-07-15 22:43:42 C 18 42 28.102 -40 10 28.24 V M22
2023-07-15 22:48:16 C 18 42 27.372 -40 10 29.24 V M22
2023-07-15 23:10:25 C 18 42 23.755 -40 10 33.28 V M22
2024-05-22 14:12:44 C 00 02 02.738 +13 10 33.31 V T05
2024-05-22 14:23:52 C 00 01 59.866 +13 10 07.75 V T05
2024-05-22 14:40:15 C 00 01 55.594 +13 09 30.31 V T05
2024-05-22 14:44:10 C 00 01 54.588 +13 09 21.17 V T05
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)