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
1965-06-29 23:10:22 A 21 26 10.09 -36 27 29.2 079
1965-06-30 00:04:22 A 21 26 05.16 -36 28 23.2 079
1965-07-02 01:04:12 A 21 21 42.28 -37 16 59.2 079
1965-07-02 01:58:12 A 21 21 37.01 -37 17 53.1 079
1965-07-02 02:55:13 A 21 21 31.66 -37 18 51.7 079
1965-07-28 21:22:06 A 19 55 39.12 -45 44 16.6 079
1965-07-28 22:12:06 A 19 55 31.02 -45 44 36.8 079
1965-07-28 23:12:06 A 19 55 21.58 -45 45 00.2 079
1965-07-29 21:24:35 A 19 51 55.62 -45 53 26.3 079
1965-07-29 22:14:36 A 19 51 47.62 -45 53 44.6 079
1966-06-22 22:25:00 A 20 53 05.75 -34 09 36.1 079
1966-06-22 23:32:59 A 20 52 57.79 -34 10 44.5 079
1966-06-23 00:49:59 A 20 52 48.91 -34 12 02.3 079
1966-06-23 02:01:00 A 20 52 40.77 -34 13 13.8 079
1966-07-16 20:36:15 A 19 30 03.14 -41 39 32.3 079
1966-07-16 22:22:15 A 19 29 46.03 -41 40 16.0 079
1966-07-21 21:00:06 A 19 11 25.02 -42 18 48.1 079
1966-07-21 22:26:20 A 19 11 12.08 -42 19 08.6 079
1967-06-08 08:29:03 A 21 01 18.39 -25 21 20.6 693
1967-06-08 09:05:03 A 21 01 12.76 -25 22 17.1 693
1968-06-11 10:20:02 A 04 07 53.69 +64 58 30.6 693
1968-06-11 10:31:03 A 04 08 04.41 +65 02 04.1 693
1968-06-12 05:09:59 A 04 35 30.60 +71 49 03.2 662
1968-06-12 05:19:52 A 04 35 54.51 +71 53 03.6 662
1968-06-12 06:01:02 A 04 37 42.19 +72 09 53.7 689
1968-06-12 11:10:26 A 04 53 26.69 +74 23 34.2 675
1968-06-12 18:53:02 A 05 29 42.74 +77 51 18.0 119
1968-06-12 19:07:59 A 05 31 23.09 +77 57 58.5 119
1968-06-12 19:20:00 A 05 32 44 +78 03.6 095
1968-06-12 19:21:26 A 05 32 50 +78 04.2 095
1968-06-12 19:22:11 A 05 32 56 +78 04.5 095
1968-06-12 19:23:00 A 05 33 01 +78 04.8 095
1968-06-12 19:23:39 A 05 33 06 +78 05.2 095
1968-06-12 19:24:40 A 05 33 13 +78 05.6 095
1968-06-12 19:37:15 A 05 34 43 +78 11.2 095
1968-06-12 19:38:16 A 05 34 49 +78 11.6 095
1968-06-12 19:40:04 A 05 35 01 +78 12.4 095
1968-06-12 19:41:25 A 05 35 11 +78 13.0 095
1968-06-12 19:42:16 A 05 35 18 +78 13.4 095
1968-06-12 19:48:18 A 05 36 00.58 +78 16 12.6 095
1968-06-12 19:48:26 A 05 36 01.92 +78 16 17.6 095
1968-06-12 19:48:37 A 05 36 03.26 +78 16 21.9 095
1968-06-12 19:49:03 A 05 36 07.27 +78 16 35.0 095
1968-06-12 19:49:14 A 05 36 08.62 +78 16 40.0 095
1968-06-12 19:49:24 A 05 36 10.00 +78 16 46.3 095
1968-06-12 19:52:35 A 05 36 31.59 +78 18 04.0 095
1968-06-12 19:52:45 A 05 36 32.52 +78 18 09.7 095
1968-06-12 19:52:55 A 05 36 33.87 +78 18 14.1 095
1968-06-12 19:53:10 A 05 36 35.24 +78 18 20.3 095
1968-06-12 19:53:20 A 05 36 36.37 +78 18 24.7 095
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)