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
1968-06-18 22:59:26 A 15 03 22.25 +00 59 42.9 822
1968-06-19 00:58:03 A 15 03 35.69 +00 29 40.4 805
1968-06-19 00:59:01 A 15 03 35.81 +00 29 25.4 805
1968-06-19 01:23:00 A 15 03 38.33 +00 23 27.2 805
1968-06-19 01:23:58 A 15 03 38.42 +00 23 12.6 805
1968-06-19 01:41:58 A 15 03 39.67 +00 18 42.5 822
1968-06-19 01:43:58 A 15 03 39.91 +00 18 12.9 822
1968-06-19 01:45:58 A 15 03 40.06 +00 17 43.0 822
1968-06-19 02:16:54 A 15 03 44.03 +00 10 09.8 805
1968-06-19 02:44:45 A 15 03 46.89 +00 03 19.5 805
1968-06-19 02:45:44 A 15 03 47.01 +00 03 05.6 805
1968-06-19 03:16:40 A 15 03 50.16 -00 04 25.4 805
1968-06-19 03:17:40 A 15 03 50.31 -00 04 40.3 805
1968-06-19 03:18:39 A 15 03 50.37 -00 04 55.1 805
1968-06-19 03:43:12 A 15 03 57.30 -00 12 33.9 693
1968-06-19 03:46:11 A 15 03 57.70 -00 13 16.0 693
1968-06-19 05:06:32 A 15 04 06.38 -00 32 35.4 662
1968-06-19 05:11:32 A 15 04 06.87 -00 33 45.7 662
1968-06-19 05:40:19 A 15 04 09.30 -00 40 24.3 675
1968-06-19 19:45:31 A 15 05 45.02 -03 39 40.3 095
1968-06-19 19:55:23 A 15 05 45.71 -03 41 32.0 095
1968-06-19 20:00:25 A 15 05 45.40 -03 42 27.4 119
1968-06-19 20:03:28 A 15 05 45.68 -03 43 02.3 119
1968-06-19 20:06:33 A 15 05 46.00 -03 43 35.1 119
1968-06-19 20:09:17 A 15 05 46.20 -03 44 12.1 119
1968-06-19 20:12:59 A 15 05 48.33 -03 42 59.4 051
1968-06-19 20:16:48 A 15 05 46.68 -03 45 31.3 119
1968-06-19 20:19:45 A 15 05 47.11 -03 46 08.2 119
1968-06-19 20:23:41 A 15 05 47.63 -03 46 53.7 119
1968-06-19 20:25:33 A 15 05 48.32 -03 47 20.2 095
1968-06-19 20:26:45 A 15 05 47.57 -03 47 28.9 119
1968-06-19 20:30:01 A 15 05 47.97 -03 48 04.7 119
1968-06-19 20:36:06 A 15 05 49.19 -03 49 17.1 095
1968-06-19 21:11:57 A 15 05 52.24 -03 56 08.7 095
1968-06-19 21:14:05 A 15 05 51.73 -03 56 27.8 119
1968-06-19 21:16:45 A 15 05 52.22 -03 56 53.6 119
1968-06-19 21:19:54 A 15 05 52.33 -03 57 31.1 119
1968-06-19 21:21:49 A 15 05 52.97 -03 57 54.6 095
1968-06-19 21:22:28 A 15 05 52.67 -03 57 58.8 119
1968-06-19 21:25:41 A 15 05 52.75 -03 58 36.9 119
1968-06-19 21:34:45 A 15 05 53.63 -04 00 19.4 119
1968-06-19 21:36:45 A 15 05 53.95 -04 00 38.1 119
1968-06-19 21:39:29 A 15 05 53.98 -04 01 11.6 119
1968-06-19 21:47:07 A 15 05 54.86 -04 02 35.0 119
1968-06-19 21:50:00 A 15 05 54.89 -04 03 10.0 119
1968-06-19 21:53:09 A 15 05 55.39 -04 03 45.0 119
1968-06-19 22:50:00 A 15 06 07.89 -04 12 31.2 822
1968-06-19 22:52:59 A 15 06 08.13 -04 13 04.6 822
1968-06-19 22:55:59 A 15 06 08.32 -04 13 37.1 822
1968-06-20 00:35:14 A 15 06 16.69 -04 31 43.1 805
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)