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
2024-06-17 05:37:06 C 19 23 47.330 -27 23 49.88 V W68
2024-06-17 06:20:05 C 19 23 24.084 -27 25 44.72 V W68
2024-06-26 23:13:52 C 17 46 49.234 -32 44 21.77 V M22
2024-06-26 23:18:30 C 17 46 47.820 -32 44 23.93 V M22
2024-06-26 23:28:40 C 17 46 44.710 -32 44 28.57 V M22
2024-06-26 23:42:45 C 17 46 40.404 -32 44 34.94 V M22
2024-06-27 01:48:02 B 17 46 04.77 -32 45 46.6 q X33
2024-06-27 02:04:05 B 17 45 59.85 -32 45 53.8 q X33
2024-06-27 02:06:08 B 17 45 59.22 -32 45 55.3 q X33
2024-06-29 04:40:41 C 17 32 04.934 -33 04 08.18 V W68
2024-06-29 04:45:59 C 17 32 03.557 -33 04 09.59 V W68
2024-06-29 04:53:23 C 17 32 01.627 -33 04 11.42 V W68
2024-06-29 05:07:34 C 17 31 57.931 -33 04 15.13 V W68
2024-06-29 23:32:40 B 17 27 27.75 -33 08 52.2 Z X33
2024-06-29 23:35:13 B 17 27 27.10 -33 08 51.7 Z X33
2024-06-29 23:37:30 B 17 27 26.54 -33 08 51.2 Z X33
2024-07-01 00:44:29 C 17 21 37.090 -33 13 18.77 V M22
2024-07-01 00:51:40 C 17 21 35.477 -33 13 19.70 V M22
2024-07-01 00:59:21 C 17 21 33.751 -33 13 20.53 V M22
2024-07-07 03:31:51 C 16 55 44.333 -33 18 13.90 V W68
2024-07-07 03:39:20 C 16 55 43.270 -33 18 13.46 V W68
2024-07-07 03:44:37 C 16 55 42.502 -33 18 13.10 V W68
2024-07-07 04:01:43 C 16 55 40.070 -33 18 12.06 V W68
2024-07-14 02:42:42 C 16 38 13.344 -33 04 22.15 V W68
2024-07-14 02:47:19 C 16 38 12.967 -33 04 21.50 V W68
2024-07-14 02:55:21 C 16 38 12.312 -33 04 20.57 V W68
2024-07-14 03:11:12 C 16 38 11.016 -33 04 18.84 V W68
2024-07-15 00:04:35 C 16 36 39.307 -33 02 12.34 V W68
2024-07-15 00:52:48 C 16 36 35.698 -33 02 07.84 V W68
2024-07-15 00:55:23 C 16 36 35.513 -33 02 07.76 V W68
2024-07-15 00:59:56 C 16 36 35.170 -33 02 07.04 V W68
2024-07-23 03:03:44 C 16 27 08.218 -32 43 34.00 V W68
2024-07-23 03:08:24 C 16 27 08.078 -32 43 34.07 V W68
2024-07-23 03:15:46 C 16 27 07.817 -32 43 32.66 V W68
2024-07-23 03:36:04 C 16 27 07.200 -32 43 31.87 V W68
2024-07-24 19:52:08 C 16 26 03.055 -32 40 13.73 V M22
2024-07-24 19:56:51 C 16 26 02.950 -32 40 14.09 V M22
2024-07-24 20:04:15 C 16 26 02.760 -32 40 12.61 V M22
2024-07-24 20:20:33 C 16 26 02.297 -32 40 11.53 V M22
2024-07-26 01:49:16 C 16 25 24.689 -32 37 56.46 V W68
2024-07-26 01:53:59 C 16 25 24.559 -32 37 56.32 V W68
2024-07-26 02:03:38 C 16 25 24.353 -32 37 55.13 V W68
2024-07-26 02:22:53 C 16 25 23.916 -32 37 53.65 V W68
2024-07-27 01:32:26 C 16 24 59.662 -32 36 12.92 V W68
2024-07-27 01:37:50 C 16 24 59.556 -32 36 12.42 V W68
2024-07-27 01:47:13 C 16 24 59.381 -32 36 11.70 V W68
2024-07-27 02:03:18 C 16 24 59.069 -32 36 10.73 V W68
2024-07-30 02:12:48 C 16 24 09.770 -32 31 28.78 V W68
2024-07-30 02:16:51 C 16 24 09.722 -32 31 28.63 V W68
2024-07-30 02:26:46 C 16 24 09.610 -32 31 28.27 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)