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
2024-05-22 14:50:58 C 00 01 52.824 +13 09 06.01 V T05
2024-05-26 10:54:54 C 23 36 17.946 +09 08 04.38 V 703
2024-05-26 10:58:14 C 23 36 16.880 +09 07 55.16 V 703
2024-05-26 11:01:35 C 23 36 15.872 +09 07 45.44 V 703
2024-05-26 11:04:55 C 23 36 14.821 +09 07 34.93 V 703
2024-05-26 14:04:56 C 23 35 20.393 +08 58 46.60 V T05
2024-05-26 14:20:10 C 23 35 15.665 +08 58 01.38 V T05
2024-05-26 14:35:36 C 23 35 10.872 +08 57 15.48 V T05
2024-05-26 14:46:56 C 23 35 07.354 +08 56 41.86 V T05
2024-05-27 03:21:30 C 23 31 14.131 +08 18 56.88 V M22
2024-05-27 03:25:30 C 23 31 12.821 +08 18 44.50 V M22
2024-05-27 03:33:27 C 23 31 10.296 +08 18 19.76 V M22
2024-05-27 03:51:06 C 23 31 04.646 +08 17 25.48 V M22
2024-06-01 10:49:13 C 22 45 29.596 +00 31 09.98 V 703
2024-06-01 10:51:48 C 22 45 28.508 +00 30 58.97 V 703
2024-06-01 10:54:24 C 22 45 27.378 +00 30 48.13 V 703
2024-06-01 10:57:00 C 22 45 26.323 +00 30 37.01 V 703
2024-06-02 09:08:42 C 22 36 05.700 -01 05 33.36 V W68
2024-06-02 09:12:39 C 22 36 03.982 -01 05 50.96 V W68
2024-06-02 09:17:17 C 22 36 01.946 -01 06 11.63 V W68
2024-06-02 09:56:38 C 22 35 44.611 -01 09 07.67 V W68
2024-06-02 10:20:41 C 22 35 35.362 -01 11 35.20 V 703
2024-06-02 10:24:04 C 22 35 33.857 -01 11 50.35 V 703
2024-06-02 10:27:28 C 22 35 32.348 -01 12 05.62 V 703
2024-06-02 10:30:52 C 22 35 30.872 -01 12 20.88 V 703
2024-06-03 10:17:03 C 22 24 59.436 -03 01 07.18 V 703
2024-06-03 10:20:24 C 22 24 57.877 -03 01 22.76 V 703
2024-06-03 10:23:47 C 22 24 56.326 -03 01 38.50 V 703
2024-06-03 10:27:09 C 22 24 54.788 -03 01 53.94 V 703
2024-06-03 13:56:20 C 22 23 19.399 -03 18 07.85 V T05
2024-06-03 14:25:56 C 22 23 05.566 -03 20 27.17 V T05
2024-06-03 14:33:58 C 22 23 01.795 -03 21 05.04 V T05
2024-06-03 14:39:12 C 22 22 59.354 -03 21 29.70 V T05
2024-06-07 09:28:49 C 21 37 43.921 -10 52 28.52 V 703
2024-06-07 09:32:09 C 21 37 42.110 -10 52 45.80 V 703
2024-06-07 09:35:30 C 21 37 40.282 -10 53 02.83 V 703
2024-06-07 09:38:50 C 21 37 38.464 -10 53 20.18 V 703
2024-06-07 13:26:27 C 21 35 35.645 -11 12 36.68 V T05
2024-06-07 13:35:30 C 21 35 30.662 -11 13 23.05 V T05
2024-06-07 14:04:38 C 21 35 14.609 -11 15 52.16 V T05
2024-06-07 14:09:12 C 21 35 12.089 -11 16 15.53 V T05
2024-06-08 12:16:41 C 21 23 06.055 -13 08 59.64 V T08
2024-06-08 12:22:27 C 21 23 02.794 -13 09 28.98 V T08
2024-06-08 12:58:58 C 21 22 42.127 -13 12 35.06 V T08
2024-06-08 13:32:53 C 21 22 22.898 -13 15 27.54 V T08
2024-06-15 03:29:06 B 19 51 21.37 -24 51 32.8 Z X33
2024-06-15 03:31:07 B 19 51 20.18 -24 51 39.8 Z X33
2024-06-15 03:33:10 B 19 51 19.05 -24 51 46.9 Z X33
2024-06-17 05:29:56 C 19 23 51.216 -27 23 30.55 V W68
2024-06-17 05:32:32 C 19 23 49.802 -27 23 37.54 V W68
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)