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
1968-06-14 23:59:00 A 14 19 53.20 +55 55 28.9 026
1968-06-14 23:59:09 A 14 19 53.42 +55 55 20.4 026
1968-06-14 23:59:20 A 14 19 53.66 +55 55 10.9 026
1968-06-15 00:00:00 A 14 19 54.46 +55 54 40.0 026
1968-06-15 00:25:02 A 14 20 33.46 +55 30 56.0 012
1968-06-15 01:18:23 A 14 21 51.57 +54 40 44.5 14.5 012
1968-06-15 04:15:10 A 14 26 06.72 +51 58 41.8 675
1968-06-15 04:19:10 A 14 26 11.43 +51 54 59.3 675
1968-06-15 04:23:10 A 14 26 16.15 +51 51 16.9 675
1968-06-15 04:23:17 A 14 26 06 +51 50.4 774
1968-06-15 04:27:09 A 14 26 20.81 +51 47 34.8 675
1968-06-15 04:31:09 A 14 26 25.50 +51 43 52.6 675
1968-06-15 04:35:10 A 14 26 30.18 +51 40 11.3 675
1968-06-15 04:39:10 A 14 26 34.89 +51 36 29.3 675
1968-06-15 04:41:13 A 14 26 28 +51 33.8 774
1968-06-15 04:43:09 A 14 26 39.45 +51 32 47.0 675
1968-06-15 04:47:09 A 14 26 44.11 +51 29 05.2 675
1968-06-15 04:51:10 A 14 26 48.69 +51 25 23.1 675
1968-06-15 04:55:10 A 14 26 53.38 +51 21 40.7 675
1968-06-15 04:59:10 A 14 26 57.92 +51 17 58.3 675
1968-06-15 05:03:09 A 14 27 02.50 +51 14 16.6 675
1968-06-15 05:07:09 A 14 27 07.01 +51 10 34.8 675
1968-06-15 05:11:10 A 14 27 11.62 +51 06 53.0 675
1968-06-15 05:15:10 A 14 27 16.11 +51 03 11.3 675
1968-06-15 07:21:05 A 14 29 34.46 +49 06 56.7 662
1968-06-15 07:41:05 A 14 29 55.36 +48 48 33.1 662
1968-06-15 12:43:44 A 14 34 58.54 +44 16 36.6 395
1968-06-15 12:53:00 A 14 35 06.30 +44 08 26.4 395
1968-06-15 13:09:14 A 14 35 19.68 +43 54 08.7 395
1968-06-15 16:31:09 A 14 38 10.23 +40 59 21.0 210
1968-06-15 16:55:10 A 14 38 25.43 +40 38 44.2 210
1968-06-15 16:55:22 A 14 38 25.66 +40 38 34.2 210
1968-06-15 16:55:34 A 14 38 25.72 +40 38 24.4 210
1968-06-15 16:57:32 A 14 38 27.12 +40 36 43.1 210
1968-06-15 16:57:45 A 14 38 27.19 +40 36 32.7 210
1968-06-15 16:57:58 A 14 38 27.43 +40 36 22.4 210
1968-06-15 16:58:09 A 14 38 27.53 +40 36 09.4 210
1968-06-15 17:08:39 A 14 38 38.94 +40 27 26.8 210
1968-06-15 17:08:59 A 14 38 39.17 +40 27 10.9 210
1968-06-15 17:09:20 A 14 38 39.27 +40 26 54.9 210
1968-06-15 17:09:40 A 14 38 39.81 +40 26 37.4 210
1968-06-15 17:10:00 A 14 38 39.96 +40 26 19.4 210
1968-06-15 17:10:20 A 14 38 40.28 +40 26 03.1 210
1968-06-15 17:18:10 A 14 38 41.59 +40 19 10.3 210
1968-06-15 17:18:24 A 14 38 41.82 +40 19 02.6 210
1968-06-15 17:18:37 A 14 38 42.05 +40 18 52.2 210
1968-06-15 17:18:55 A 14 38 42.17 +40 18 38.7 210
1968-06-15 18:08:33 A 14 39 16.25 +39 36 31.1 210
1968-06-15 18:08:47 A 14 39 16.48 +39 36 17.8 210
1968-06-15 18:08:53 A 14 39 16.60 +39 36 11.9 210
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)