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
1968-06-22 13:50:30 A 15 10 45.56 -12 23 46.6 371
1968-06-22 13:52:00 A 15 10 45.61 -12 23 54.2 371
1968-06-22 13:53:30 A 15 10 45.63 -12 24 02.4 371
1968-06-22 13:56:30 A 15 10 45.81 -12 24 17.7 371
1968-06-22 13:57:59 A 15 10 45.87 -12 24 24.7 371
1968-06-22 13:59:30 A 15 10 45.94 -12 24 34.2 371
1968-06-22 14:01:00 A 15 10 46.02 -12 24 41.2 371
1968-06-22 14:02:30 A 15 10 46.10 -12 24 49.9 371
1968-06-22 14:04:13 A 15 10 46.14 -12 24 58.6 371
1968-06-22 14:05:59 A 15 10 46.21 -12 25 08.6 371
1968-06-22 14:07:29 A 15 10 46.27 -12 25 16.3 371
1968-06-22 14:08:59 A 15 10 46.35 -12 25 24.5 371
1968-06-22 14:10:30 A 15 10 46.38 -12 25 32.0 371
1968-06-22 14:20:30 A 15 10 46.86 -12 26 27.8 371
1968-06-22 14:21:59 A 15 10 46.95 -12 26 36.3 371
1968-06-22 14:23:37 A 15 10 46.99 -12 26 44.0 371
1968-06-22 14:24:59 A 15 10 47.06 -12 26 52.4 371
1968-06-22 14:26:30 A 15 10 47.12 -12 26 59.4 371
1968-06-22 14:28:00 A 15 10 47.19 -12 27 07.6 371
1968-06-22 14:29:30 A 15 10 47.26 -12 27 15.9 371
1968-06-22 14:30:59 A 15 10 47.30 -12 27 24.0 371
1968-06-22 14:32:30 A 15 10 47.35 -12 27 31.1 371
1968-06-22 14:35:30 A 15 10 47.62 -12 27 47.9 371
1968-06-22 14:37:30 A 15 10 47.60 -12 27 55.2 371
1968-06-22 14:38:30 A 15 10 47.64 -12 28 04.4 371
1968-06-22 14:39:59 A 15 10 47.74 -12 28 09.1 371
1968-06-22 14:41:30 A 15 10 47.83 -12 28 20.0 371
1968-06-22 14:42:59 A 15 10 47.82 -12 28 28.2 371
1968-06-22 14:44:30 A 15 10 47.96 -12 28 35.0 371
1968-06-22 14:46:00 A 15 10 47.99 -12 28 43.5 371
1968-06-22 14:47:30 A 15 10 48.11 -12 28 52.3 371
1968-06-22 22:24:02 A 15 11 14.12 -13 08 31.3 026
1968-06-22 22:27:00 A 15 11 14.21 -13 08 41.8 026
1968-06-22 22:29:58 A 15 11 14.30 -13 08 52.7 026
1968-06-23 05:03:59 A 15 11 36.56 -13 40 40.5 662
1968-06-23 05:15:00 A 15 11 36.98 -13 41 31.9 662
1968-06-23 11:37:30 A 15 11 57.19 -14 10 41.2 371
1968-06-23 11:39:30 A 15 11 57.28 -14 10 49.4 371
1968-06-23 11:41:00 A 15 11 57.30 -14 10 54.7 371
1968-06-23 11:42:30 A 15 11 57.40 -14 11 01.9 371
1968-06-23 19:47:29 A 15 12 20.39 -14 44 33.6 051
1968-06-24 05:05:00 A 15 12 46.44 -15 22 29.5 662
1968-06-24 05:19:00 A 15 12 46.90 -15 23 23.0 662
1968-06-24 19:47:29 A 15 13 25.39 -16 14 34.6 051
1968-06-25 01:15:20 A 15 13 39.50 -16 32 48.4 808
1968-06-25 01:35:17 A 15 13 40.03 -16 33 52.9 808
1968-06-25 01:55:14 A 15 13 40.66 -16 34 58.2 808
1968-06-25 05:05:29 A 15 13 48.81 -16 45 59.3 662
1968-06-25 05:19:30 A 15 13 49.22 -16 46 43.7 662
1968-06-25 19:39:00 A 15 14 23.92 -17 28 50.8 051
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)