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
1968-06-13 22:18:51 A 12 35 55.72 +77 56 08.2 119
1968-06-13 23:02:00 A 12 42 48.40 +77 26 19.0 119
1968-06-13 23:04:05 A 12 43 07.98 +77 24 49.8 119
1968-06-13 23:05:55 A 12 43 24.44 +77 23 33.7 119
1968-06-14 03:28:53 A 13 16 20 +74 10.7 774
1968-06-14 03:54:48 A 13 18 51 +73 50.1 774
1968-06-14 04:28:55 A 13 22 18.76 +73 23 40.5 675
1968-06-14 05:21:20 A 13 26 54.62 +72 41 00.5 662
1968-06-14 05:46:20 A 13 28 58.53 +72 20 19.7 662
1968-06-14 06:10:23 A 13 30 53.15 +72 00 21.3 662
1968-06-14 06:28:10 A 13 32 10.47 +71 45 18.5 689
1968-06-14 06:28:30 A 13 32 12.05 +71 45 01.5 689
1968-06-14 06:41:19 A 13 33 15.73 +71 34 25.7 662
1968-06-14 07:09:09 A 13 35 14.64 +71 10 40.6 689
1968-06-14 07:09:22 A 13 35 15.73 +71 10 29.9 689
1968-06-14 07:09:32 A 13 35 16.44 +71 10 22.5 689
1968-06-14 12:16:14 A 13 54 35.72 +66 44 08.8 395
1968-06-14 13:47:15 A 13 59 26.98 +65 16 34.8 395
1968-06-14 13:58:44 A 13 59 45.82 +65 13 12.7 395
1968-06-14 14:12:59 A 14 00 09.50 +65 02 29.6 395
1968-06-14 14:21:59 A 14 00 25.17 +64 55 38.8 395
1968-06-14 14:28:59 A 14 00 37.29 +64 50 28.6 395
1968-06-14 14:35:59 A 14 00 49.05 +64 45 09.4 395
1968-06-14 18:19:49 A 14 09 56.70 +61 11 35.8 210
1968-06-14 18:43:11 A 14 10 44.66 +60 50 02.2 210
1968-06-14 18:53:39 A 14 11 06.01 +60 40 19.0 210
1968-06-14 19:01:39 A 14 10 59.91 +60 35 56.7 210
1968-06-14 19:01:50 A 14 11 00.15 +60 35 48.5 210
1968-06-14 19:02:01 A 14 11 00.64 +60 35 37.1 210
1968-06-14 19:10:11 A 14 11 26.62 +60 23 16.7 210
1968-06-14 19:10:19 A 14 11 26.70 +60 23 07.0 210
1968-06-14 19:10:25 A 14 11 27.05 +60 23 00.8 210
1968-06-14 19:10:35 A 14 11 27.34 +60 22 53.9 210
1968-06-14 19:10:41 A 14 11 27.45 +60 22 48.5 210
1968-06-14 19:10:51 A 14 11 27.94 +60 22 36.2 210
1968-06-14 21:06:00 A 14 15 11.36 +58 37 35.7 056
1968-06-14 21:09:59 A 14 15 17.66 +58 33 57.6 056
1968-06-14 21:24:59 A 14 15 46.88 +58 19 32.5 033
1968-06-14 21:29:00 A 14 15 53.32 +58 16 01.3 033
1968-06-14 22:29:21 A 14 17 36.72 +57 18 54.7 012
1968-06-14 22:59:59 A 14 18 19.38 +56 50 28.2 056
1968-06-14 23:03:59 A 14 18 26.02 +56 46 43.9 056
1968-06-14 23:12:13 A 14 18 41.66 +56 39 27.8 026
1968-06-14 23:14:10 A 14 18 44.39 +56 37 40.6 026
1968-06-14 23:14:14 A 14 18 42.75 +56 38 26.4 012
1968-06-14 23:19:41 A 14 18 52.28 +56 32 30.1 026
1968-06-14 23:38:01 A 14 19 20.98 +56 15 17.3 026
1968-06-14 23:40:07 A 14 19 24.32 +56 13 18.1 026
1968-06-14 23:41:58 A 14 19 27.27 +56 11 32.9 026
1968-06-14 23:57:59 A 14 19 51.72 +55 56 25.5 026
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)