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
2014-05-19 06:16:10 S 21 55 40.92 -13 55 41.6 L C51
2014-06-20 13:36:02 C 20 05 36.930 -32 40 26.92 L F51
2014-06-20 13:50:00 C 20 05 33.845 -32 40 44.88 L F51
2014-06-20 14:04:02 C 20 05 30.736 -32 41 02.92 L F51
2014-06-24 10:45:34 C 19 45 02.887 -34 31 52.92 L F51
2014-06-24 10:59:56 C 19 44 59.614 -34 32 08.70 L F51
2014-06-24 11:14:22 C 19 44 56.299 -34 32 24.49 L F51
2014-06-24 11:28:42 C 19 44 53.018 -34 32 40.16 L F51
2015-06-13 21:51:27 C 07 05 33.81 +63 22 43.7 16.0 q K50
2015-06-13 21:54:21 C 07 05 44.68 +63 23 04.9 15.7 q K50
2015-06-13 21:55:24 C 07 05 48.64 +63 23 12.6 16.5 q K50
2015-06-13 22:12:25 C 07 06 52.62 +63 25 17.1 16.4 q K50
2015-06-13 22:15:36 C 07 07 04.55 +63 25 40.2 15.5 q K50
2015-06-13 22:17:42 C 07 07 12.47 +63 25 55.6 16.3 q K50
2015-06-14 23:01:52 C 09 03 21.13 +64 13 02.8 q J69
2015-06-14 23:05:19 C 09 03 39.86 +64 12 40.7 q J69
2015-06-14 23:08:46 C 09 03 58.61 +64 12 18.7 q J69
2015-06-14 23:12:12 C 09 04 17.26 +64 11 56.4 q J69
2015-06-14 23:15:39 C 09 04 35.91 +64 11 34.1 q J69
2015-06-14 23:19:05 C 09 04 54.69 +64 11 11.3 q J69
2015-06-15 20:51:43 C 10 56 37.04 +58 34 32.3 q 560
2015-06-15 20:53:11 C 10 56 43.73 +58 33 55.3 q 560
2015-06-15 20:55:01 C 10 56 52.08 +58 33 08.9 q 560
2015-06-15 22:28:57 C 11 03 55.18 +57 52 44.3 o C95
2015-06-15 22:32:26 C 11 04 13.03 +57 51 12.2 q J69
2015-06-15 22:34:37 C 11 04 20.32 +57 50 14.1 o C95
2015-06-15 22:40:16 C 11 04 45.54 +57 47 43.5 o C95
2015-06-15 23:06:01 C 11 06 41.48 +57 36 15.1 q J69
2015-06-15 23:12:58 C 11 07 12.09 +57 33 07.5 q J69
2015-06-15 23:45:47 C 11 09 33.69 +57 18 10.5 o C95
2015-06-16 05:01:57 C 11 31 21.20 +54 46 56.9 P V78
2015-06-16 05:03:12 C 11 31 25.96 +54 46 19.1 P V78
2015-06-16 05:07:12 C 11 31 41.50 +54 44 15.2 P V78
2015-06-16 21:06:55 C 12 24 09.43 +45 39 17.4 q C23
2015-06-16 21:15:40 C 12 24 32.73 +45 33 55.9 q C23
2015-06-16 21:20:14 C 12 24 44.50 +45 31 10.9 q K26
2015-06-16 21:24:06 C 12 24 55.15 +45 28 45.9 q C23
2015-06-16 21:25:30 C 12 24 58.43 +45 27 57.6 q K26
2015-06-16 21:29:59 C 12 25 10.36 +45 25 12.1 q K26
2015-06-16 21:40:59 C 12 25 39.44 +45 18 26.7 q K26
2015-06-16 21:44:45 C 12 25 49.33 +45 16 08.3 q K26
2015-06-16 21:49:59 C 12 26 03.13 +45 12 54.8 q K26
2015-06-16 22:17:40 C 12 27 16.68 +44 55 55.2 q J69
2015-06-16 22:19:26 C 12 27 21.27 +44 54 49.7 q J69
2015-06-16 22:19:44 C 12 27 20.95 +44 54 36.3 q K26
2015-06-16 22:21:13 C 12 27 25.88 +44 53 44.5 q J69
2015-06-16 22:22:58 C 12 27 30.46 +44 52 39.2 q J69
2015-06-16 22:24:45 C 12 27 35.06 +44 51 33.7 q J69
2015-06-16 22:26:30 C 12 27 38.48 +44 50 26.8 q K26
2015-06-16 22:34:00 C 12 27 57.98 +44 45 49.1 q K26
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)