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
2006-08-12 09:15:09 C 15 16 52.89 -23 44 42.7 r E12
2006-08-12 09:26:51 C 15 16 53.97 -23 44 49.6 r E12
2006-08-12 09:38:32 C 15 16 55.05 -23 44 55.8 r E12
2009-05-28 18:46:41 C 23 39 07.56 -21 16 47.6 r E12
2009-05-28 19:03:32 C 23 39 08.82 -21 16 48.0 r E12
2009-05-28 19:20:46 C 23 39 10.08 -21 16 48.5 r E12
2009-05-28 19:38:11 C 23 39 11.41 -21 16 48.9 r E12
2009-07-19 17:14:35 C 01 52 38.53 -29 11 12.1 r E12
2009-07-19 17:27:33 C 01 52 40.84 -29 11 23.8 r E12
2009-07-19 17:40:38 C 01 52 43.17 -29 11 35.5 r E12
2009-07-19 17:53:43 C 01 52 45.51 -29 11 47.3 r E12
2009-07-23 17:45:04 C 02 11 27.27 -30 41 30.7 r E12
2010-08-04 15:14:38 C 22 59 23.01 -53 23 50.8 r E12
2010-08-04 15:28:58 C 22 59 21.19 -53 24 21.3 r E12
2010-08-04 15:43:20 C 22 59 19.36 -53 24 51.7 r E12
2010-08-04 15:57:52 C 22 59 17.51 -53 25 22.4 r E12
2010-08-28 12:26:17 C 20 05 04.45 -69 07 47.9 r E12
2010-08-28 12:45:01 C 20 04 55.01 -69 07 55.0 r E12
2010-08-28 13:03:47 C 20 04 45.67 -69 08 02.6 r E12
2010-09-12 15:45:04 S 17 32 56.69 -65 49 50.3 L C51
2010-09-12 18:55:35 S 17 32 01.27 -65 45 59.5 L C51
2010-09-12 20:30:45 S 17 31 33.67 -65 44 03.6 L C51
2010-09-12 22:05:55 S 17 31 06.21 -65 42 08.0 L C51
2010-09-12 22:06:06 S 17 31 06.12 -65 42 08.3 L C51
2010-09-12 23:41:16 S 17 30 38.81 -65 40 11.7 L C51
2010-09-13 02:51:47 S 17 29 44.41 -65 36 18.6 L C51
2010-09-13 06:02:18 S 17 28 50.381 -65 32 25.12 L C51
2010-09-15 16:46:26 S 17 13 24.694 -64 17 29.69 L C51
2011-06-27 17:29:00 C 22 22 13.51 -33 51 05.3 r E12
2011-06-27 17:48:21 C 22 22 12.93 -33 51 24.3 r E12
2011-06-27 18:07:19 C 22 22 12.28 -33 51 41.7 r E12
2011-06-27 18:26:20 C 22 22 11.67 -33 52 00.1 r E12
2011-07-26 14:08:51 C 21 24 14.69 -46 48 37.2 r E12
2011-07-26 14:21:03 C 21 24 12.85 -46 48 49.8 r E12
2011-07-26 14:33:21 C 21 24 11.02 -46 49 03.5 r E12
2011-07-26 14:45:35 C 21 24 09.19 -46 49 16.5 r E12
2011-09-01 12:12:55 C 18 56 31.31 -51 45 31.7 r E12
2011-09-01 12:17:09 C 18 56 30.81 -51 45 30.1 r E12
2012-06-07 06:42:04 C 21 52 25.03 -28 39 46.7 o 807
2012-06-07 06:56:34 C 21 52 24.74 -28 39 57.0 o 807
2012-06-07 07:11:09 C 21 52 24.44 -28 40 07.3 o 807
2012-06-07 07:23:38 C 21 52 24.19 -28 40 16.1 o 807
2013-04-07 18:53:26 C 21 14 47.34 -16 55 27.8 q E12
2014-05-18 12:53:43 S 21 56 54.74 -13 34 51.5 L C51
2014-05-18 16:03:19 S 21 56 41.50 -13 38 37.3 L C51
2014-05-18 19:12:44 S 21 56 28.20 -13 42 25.1 L C51
2014-05-18 20:47:33 S 21 56 21.47 -13 44 18.2 L C51
2014-05-18 22:22:21 S 21 56 14.71 -13 46 11.1 L C51
2014-05-18 23:57:08 S 21 56 08.02 -13 48 05.5 L C51
2014-05-19 03:06:33 S 21 55 54.52 -13 51 52.6 L C51
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)