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
1968-06-12 19:53:30 A 05 36 38.16 +78 18 29.6 095
1968-06-12 19:54:15 A 05 36 44 +78 18.9 095
1968-06-12 19:55:24 A 05 36 53 +78 19.3 095
1968-06-12 19:56:15 A 05 36 58 +78 19.7 095
1968-06-12 19:57:05 A 05 37 05 +78 20.1 095
1968-06-12 19:57:58 A 05 37 11 +78 20.4 095
1968-06-12 20:25:18 A 05 40 36 +78 32.6 095
1968-06-12 20:26:25 A 05 40 42 +78 33.1 095
1968-06-12 20:27:28 A 05 40 51 +78 33.6 095
1968-06-12 20:28:38 A 05 41 00 +78 34.1 095
1968-06-12 20:29:33 A 05 41 06 +78 34.5 095
1968-06-12 20:44:39 A 05 43 04 +78 41.2 095
1968-06-12 20:45:30 A 05 43 11 +78 41.7 095
1968-06-12 20:46:06 A 05 43 16 +78 41.9 095
1968-06-12 20:47:04 A 05 43 23 +78 42.3 095
1968-06-12 20:47:43 A 05 43 29 +78 42.6 095
1968-06-12 20:58:05 A 05 44 54 +78 47.2 095
1968-06-12 20:58:45 A 05 44 57 +78 47.4 095
1968-06-12 20:59:34 A 05 45 03 +78 47.8 095
1968-06-12 21:00:30 A 05 45 12 +78 48.2 095
1968-06-12 21:01:39 A 05 45 21 +78 48.8 095
1968-06-12 21:05:11 A 05 45 50.72 +78 50 14.4 095
1968-06-12 21:05:23 A 05 45 52.19 +78 50 18.6 095
1968-06-12 21:05:32 A 05 45 53.91 +78 50 24.0 095
1968-06-12 21:06:44 A 05 46 03.53 +78 50 54.0 095
1968-06-12 21:07:31 A 05 46 09.74 +78 51 14.6 095
1968-06-12 21:07:43 A 05 46 11.25 +78 51 19.9 095
1968-06-12 21:07:52 A 05 46 12.50 +78 51 24.3 095
1968-06-13 05:16:31 A 07 25 23.09 +81 59 42.0 675
1968-06-13 05:16:43 A 07 25 27.17 +81 59 55.8 662
1968-06-13 05:24:42 A 07 27 48.77 +82 02 03.8 662
1968-06-13 05:30:31 A 07 29 32.53 +82 03 21.9 675
1968-06-13 08:21:05 A 08 26 29.01 +82 35 05.3 689
1968-06-13 08:36:04 A 08 31 57.00 +82 36 34.7 689
1968-06-13 13:19:14 A 10 17 41.83 +82 08 33.8 395
1968-06-13 16:37:14 A 11 22 26.66 +81 15 36.2 395
1968-06-13 18:31:01 A 11 50 54.02 +80 16 09.3 119
1968-06-13 18:41:00 A 11 53 14.40 +80 10 43.7 119
1968-06-13 19:00:30 A 11 57 44.17 +79 59 57.1 119
1968-06-13 19:03:40 A 11 58 24.83 +79 58 03.3 119
1968-06-13 19:07:20 A 11 59 15.95 +79 55 56.9 119
1968-06-13 19:21:20 A 12 02 19.08 +79 48 02.6 119
1968-06-13 19:25:31 A 12 03 12.29 +79 45 40.2 119
1968-06-13 19:29:30 A 12 04 05.89 +79 43 20.3 119
1968-06-13 20:52:21 A 12 20 45.01 +78 52 54.8 119
1968-06-13 20:54:21 A 12 21 09.34 +78 51 39.0 119
1968-06-13 20:56:45 A 12 21 37.26 +78 50 05.9 119
1968-06-13 22:12:06 A 12 34 50.74 +78 00 37.8 119
1968-06-13 22:14:26 A 12 35 12.76 +77 59 05.0 119
1968-06-13 22:16:20 A 12 35 32.81 +77 57 47.0 119
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)