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
2015-06-16 22:38:05 C 12 28 08.94 +44 43 15.6 q C23
2015-06-16 22:46:02 C 12 28 29.45 +44 38 21.9 q C23
2015-06-16 22:54:08 C 12 28 50.32 +44 33 21.7 q C23
2015-06-16 22:55:30 C 12 28 55.55 +44 32 06.6 15.5 r 238
2015-06-16 22:55:49 C 12 28 56.29 +44 31 55.2 14.2 r 238
2015-06-16 22:56:47 C 12 28 58.97 +44 31 19.9 13.2 r 238
2015-06-16 22:59:19 C 12 29 05.40 +44 29 44.0 13.5 r 238
2015-06-16 22:59:57 C 12 29 07.03 +44 29 20.7 14.2 r 238
2015-06-16 23:20:20 C 12 29 59.29 +44 16 46.6 13.4 r 238
2015-06-16 23:21:18 C 12 30 01.69 +44 16 11.3 12.2 r 238
2015-06-17 20:41:41 C 13 13 10.15 +31 18 43.8 q C47
2015-06-17 20:42:49 C 13 13 12.54 +31 18 18.9 q C77
2015-06-17 20:43:42 C 13 13 13.93 +31 17 47.6 q C77
2015-06-17 20:44:36 C 13 13 15.32 +31 17 16.4 q C77
2015-06-17 20:45:29 C 13 13 16.67 +31 16 45.3 q C77
2015-06-17 20:46:22 C 13 13 18.05 +31 16 13.6 q C77
2015-06-17 20:48:08 C 13 13 20.09 +31 14 58.9 q C47
2015-06-17 20:54:37 C 13 13 30.12 +31 11 12.1 q C47
2015-06-17 21:01:07 C 13 13 40.11 +31 07 25.2 q C47
2015-06-17 21:01:17 C 13 13 41.02 +31 07 32.7 q K32
2015-06-17 21:03:22 C 13 13 44.15 +31 06 20.3 q K32
2015-06-17 21:05:26 C 13 13 47.35 +31 05 08.3 q K32
2015-06-17 21:07:31 C 13 13 50.53 +31 03 56.3 q K32
2015-06-17 21:07:37 C 13 13 50.10 +31 03 38.6 q C47
2015-06-17 21:09:35 C 13 13 53.70 +31 02 43.0 q K32
2015-06-18 05:20:11 C 13 25 35.19 +26 27 39.8 P V78
2015-06-18 05:26:31 C 13 25 43.37 +26 24 13.4 P V78
2015-06-18 05:34:18 C 13 25 53.41 +26 20 00.3 P V78
2015-06-18 21:17:00 C 13 43 39.97 +18 31 42.1 q C23
2015-06-18 21:19:26 C 13 43 42.28 +18 30 35.8 q C23
2015-06-18 21:22:01 C 13 43 44.71 +18 29 25.1 q C23
2015-06-18 21:38:20 C 13 43 59.86 +18 22 21.1 q 619
2015-06-18 21:39:22 C 13 44 00.82 +18 21 53.4 q 619
2015-06-18 21:50:26 C 13 44 11.19 +18 16 53.2 q 619
2015-06-18 21:51:28 C 13 44 12.15 +18 16 25.0 q 619
2015-06-19 00:11:27 C 13 46 22.26 +17 13 45.8 q J69
2015-06-19 00:14:03 C 13 46 24.61 +17 12 37.5 q J69
2015-06-19 00:16:13 C 13 46 25.58 +17 12 08.3 u J37
2015-06-19 00:16:39 C 13 46 26.99 +17 11 28.7 q J69
2015-06-19 00:19:15 C 13 46 29.36 +17 10 20.4 q J69
2015-06-19 00:21:51 C 13 46 31.71 +17 09 11.8 q J69
2015-06-19 00:22:27 C 13 46 31.21 +17 09 24.2 u J37
2015-06-19 00:38:56 C 13 46 46.06 +17 02 11.4 u J37
2015-06-19 01:03:38 C 13 47 08.25 +16 51 25.4 u J37
2015-06-19 01:03:59 C 13 47 08.58 +16 51 16.0 u J37
2015-06-19 01:35:53 C 13 47 37.10 +16 37 26.2 u J37
2015-06-19 03:58:25 C 13 49 46.97 +15 37 05.3 P V78
2015-06-19 04:02:39 C 13 49 50.51 +15 35 19.0 P V78
2015-06-19 04:04:31 C 13 49 52.08 +15 34 32.0 P V78
2015-06-19 11:35:58 C 13 55 56.94 +12 37 38.6 q Q68
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)