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
2000-08-25 07:45:06 C 05 36 34.67 -73 14 30.4 860
2002-07-31 13:09:33 C 20 30 29.56 -47 49 14.5 c 474
2002-07-31 13:13:29 C 20 30 28.87 -47 49 17.3 c 474
2002-07-31 13:17:19 C 20 30 28.24 -47 49 19.6 c 474
2004-05-03 18:13:46 C 21 39 35.53 -16 59 25.3 r E12
2004-05-03 18:26:53 C 21 39 35.64 -16 59 31.9 r E12
2004-05-03 18:39:59 C 21 39 35.63 -16 59 38.4 r E12
2004-05-03 18:53:11 C 21 39 35.71 -16 59 44.2 r E12
2004-05-15 17:08:11 C 21 38 27.57 -19 43 20.1 r E12
2004-05-15 17:21:21 C 21 38 27.40 -19 43 29.9 r E12
2004-05-15 17:34:34 C 21 38 27.13 -19 43 38.8 r E12
2004-05-15 17:47:42 C 21 38 26.81 -19 43 47.2 r E12
2004-06-20 05:01:45 C 20 39 54.17 -33 13 27.9 r 859
2004-06-20 05:04:43 C 20 39 53.81 -33 13 31.8 r 859
2004-06-20 05:10:37 C 20 39 52.97 -33 13 38.8 r 859
2004-06-26 05:14:02 C 20 18 50.06 -35 44 27.4 r 859
2004-06-26 05:16:53 C 20 18 49.64 -35 44 30.4 r 859
2004-06-26 05:19:44 C 20 18 49.16 -35 44 32.7 r 859
2004-06-27 04:57:12 C 20 15 05.75 -36 07 34.5 r 859
2004-06-27 05:00:06 C 20 15 05.30 -36 07 36.9 r 859
2005-06-09 10:10:17 C 20 55 42.85 -22 02 19.2 r 703
2005-06-09 10:18:55 C 20 55 40.08 -22 02 42.5 r 703
2005-06-09 10:27:37 C 20 55 37.30 -22 03 05.7 r 703
2005-06-09 10:36:18 C 20 55 34.50 -22 03 29.2 r 703
2005-06-26 03:23:18 C 18 43 55.23 -34 16 28.1 r I77
2005-06-26 03:24:59 C 18 43 54.65 -34 16 28.9 r I77
2005-06-26 03:26:39 C 18 43 54.19 -34 16 30.3 r I77
2005-07-09 12:09:19 C 17 31 28.82 -35 52 29.4 r 423
2005-07-09 12:17:27 C 17 31 27.47 -35 52 29.2 r 423
2005-07-09 12:25:34 C 17 31 26.16 -35 52 29.5 r 423
2005-07-09 12:33:40 C 17 31 24.83 -35 52 29.1 r 423
2005-07-09 12:41:47 C 17 31 23.51 -35 52 28.9 r 423
2005-07-09 12:50:26 C 17 31 22.08 -35 52 28.7 r 423
2005-07-13 10:34:45 C 17 18 04.11 -35 45 24.7 r 428
2005-07-13 11:57:20 C 17 17 53.33 -35 45 15.8 r 428
2005-07-13 11:59:23 C 17 17 53.07 -35 45 15.6 r 428
2005-07-13 12:01:27 C 17 17 52.81 -35 45 15.2 r 428
2006-07-09 04:31:40 C 13 03 44.53 -03 41 37.4 r 703
2006-07-09 04:33:10 C 13 03 44.96 -03 41 42.7 r 703
2006-07-09 04:34:42 C 13 03 45.43 -03 41 47.9 r 703
2006-07-09 04:36:14 C 13 03 46.00 -03 41 53.2 r 703
2006-07-21 10:20:59 C 14 12 17.85 -15 31 48.1 r E12
2006-07-21 10:33:16 C 14 12 19.90 -15 32 07.6 r E12
2006-07-21 10:45:29 C 14 12 21.96 -15 32 26.5 r E12
2006-07-21 10:57:43 C 14 12 24.01 -15 32 45.4 r E12
2006-07-21 11:08:19 C 14 12 25.74 -15 33 02.0 r E12
2006-07-21 11:20:30 C 14 12 27.79 -15 33 20.9 r E12
2006-07-21 11:32:43 C 14 12 29.80 -15 33 40.1 r E12
2006-07-21 11:44:58 C 14 12 31.86 -15 33 59.5 r E12
2006-08-12 09:03:27 C 15 16 51.81 -23 44 36.8 r E12
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)