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
1968-06-15 20:11:42 A 14 40 43.24 +37 54 16.5 119
1968-06-15 20:14:13 A 14 40 45.17 +37 52 18.3 119
1968-06-15 20:16:09 A 14 40 46.59 +37 50 42.1 119
1968-06-15 20:17:52 A 14 40 47.34 +37 49 14.0 119
1968-06-15 20:23:58 A 14 40 51.23 +37 44 15.6 119
1968-06-15 20:34:28 A 14 40 57.80 +37 35 33.8 119
1968-06-15 21:42:59 A 14 41 44.61 +36 39 34.3 056
1968-06-15 21:46:37 A 14 41 42.60 +36 36 41.1 119
1968-06-15 21:47:00 A 14 41 47.01 +36 36 21.7 056
1968-06-15 21:47:57 A 14 41 43.32 +36 35 35.3 119
1968-06-15 21:49:59 A 14 41 48.82 +36 33 56.3 056
1968-06-15 21:51:59 A 14 41 50.02 +36 32 20.9 056
1968-06-15 21:57:23 A 14 41 49.12 +36 27 58.2 119
1968-06-16 04:12:07 A 14 45 38.31 +31 38 45.7 675
1968-06-16 08:13:30 A 14 47 28.32 +28 43 47.3 662
1968-06-16 08:31:30 A 14 47 36.13 +28 31 06.5 662
1968-06-16 11:39:59 A 14 49 09.12 +26 22 38.4 387
1968-06-16 11:44:00 A 14 49 10.49 +26 20 20.8 387
1968-06-16 12:06:00 A 14 49 18.78 +26 05 27.8 387
1968-06-16 12:09:00 A 14 49 20.16 +26 03 17.8 387
1968-06-16 12:11:59 A 14 49 21.20 +26 01 24.4 387
1968-06-16 12:18:30 A 14 49 23.49 +25 57 09.3 387
1968-06-16 12:20:30 A 14 49 24.19 +25 55 50.2 387
1968-06-16 12:22:30 A 14 49 25.01 +25 54 30.1 387
1968-06-16 12:24:30 A 14 49 25.71 +25 53 11.5 387
1968-06-16 12:48:29 A 14 49 34.77 +25 37 22.4 387
1968-06-16 12:50:30 A 14 49 35.51 +25 36 04.6 387
1968-06-16 12:52:30 A 14 49 36.22 +25 34 45.5 387
1968-06-16 12:54:30 A 14 49 36.92 +25 33 27.5 387
1968-06-16 12:56:30 A 14 49 37.71 +25 32 08.0 387
1968-06-16 14:40:49 A 14 50 15.83 +24 24 44.2 13.0 370
1968-06-16 15:09:16 A 14 50 26.13 +24 07 09.8 370
1968-06-16 15:22:07 A 14 50 30.76 +23 58 38.3 370
1968-06-16 19:18:57 A 14 52 03.19 +21 33 50.2 119
1968-06-16 19:20:27 A 14 52 03.62 +21 32 57.8 119
1968-06-16 19:22:06 A 14 52 04.51 +21 31 54.7 119
1968-06-16 19:28:26 A 14 52 06.25 +21 28 10.9 119
1968-06-16 19:35:47 A 14 52 08.63 +21 23 51.8 119
1968-06-16 19:37:43 A 14 52 09.13 +21 22 42.1 119
1968-06-16 19:39:24 A 14 52 09.80 +21 21 43.0 119
1968-06-16 19:45:41 A 14 52 11.72 +21 18 03.2 119
1968-06-16 19:47:03 A 14 52 12.15 +21 17 10.3 119
1968-06-16 19:48:39 A 14 52 12.80 +21 16 16.1 119
1968-06-16 20:50:54 A 14 52 31.83 +20 39 55.2 119
1968-06-16 20:52:27 A 14 52 32.61 +20 39 03.8 119
1968-06-16 20:54:04 A 14 52 32.92 +20 38 07.8 119
1968-06-16 20:56:38 A 14 52 33.72 +20 36 41.9 119
1968-06-16 20:58:38 A 14 52 34.46 +20 35 31.3 119
1968-06-16 21:07:56 A 14 52 37.44 +20 30 06.8 119
1968-06-16 22:01:37 A 14 52 59.05 +19 59 28.1 999
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)