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
2015-06-19 11:37:59 C 13 55 58.41 +12 36 52.8 q Q68
2015-06-19 11:40:13 C 13 56 00.04 +12 36 02.2 q Q68
2015-06-19 12:21:19 C 13 56 29.98 +12 20 31.4 q Q68
2015-06-19 12:23:04 C 13 56 31.22 +12 19 52.6 q Q68
2015-06-19 12:25:30 C 13 56 32.98 +12 18 57.7 q Q68
2015-06-19 13:05:14 C 13 57 01.72 +12 04 05.8 q Q68
2015-06-19 13:07:14 C 13 57 03.14 +12 03 21.7 q Q68
2015-06-19 13:09:25 C 13 57 04.78 +12 02 32.2 q Q68
2015-06-19 20:44:30 C 14 02 23.93 +09 19 23.0 q 585
2015-06-19 20:45:04 C 14 02 24.29 +09 19 11.4 q 585
2015-06-19 20:45:15 C 14 02 24.43 +09 19 07.8 q 585
2015-06-19 20:45:26 C 14 02 24.55 +09 19 04.0 q 585
2015-06-19 20:45:37 C 14 02 24.65 +09 19 00.3 q 585
2015-06-19 20:55:26 C 14 02 30.94 +09 15 42.5 q 585
2015-06-19 20:55:52 C 14 02 31.23 +09 15 33.9 q 585
2015-06-19 20:56:14 C 14 02 31.46 +09 15 26.6 q 585
2015-06-19 20:56:50 C 14 02 31.85 +09 15 14.4 q 585
2015-06-19 20:57:02 C 14 02 31.98 +09 15 10.4 q 585
2015-06-19 20:57:13 C 14 02 32.10 +09 15 06.8 q 585
2015-06-19 20:57:24 C 14 02 32.21 +09 15 03.0 q 585
2015-06-19 20:57:35 C 14 02 32.34 +09 14 59.2 q 585
2015-06-19 20:57:47 C 14 02 32.46 +09 14 55.4 q 585
2015-06-19 20:57:59 C 14 02 32.57 +09 14 51.7 q 585
2015-06-20 08:46:23 C 14 09 43.87 +05 37 45.8 q Q68
2015-06-20 10:01:00 C 14 10 22.80 +05 16 33.9 q Q68
2015-06-20 10:03:12 C 14 10 23.96 +05 15 56.6 q Q68
2015-06-20 10:04:06 C 14 10 24.42 +05 15 41.6 q Q68
2015-06-20 10:05:12 C 14 10 24.98 +05 15 23.1 q Q68
2015-06-20 10:44:50 C 14 10 45.42 +05 04 15.7 q Q68
2015-06-20 10:47:15 C 14 10 46.65 +05 03 35.3 q Q68
2015-06-20 10:48:49 C 14 10 47.46 +05 03 09.5 q Q68
2015-06-20 21:04:07 C 14 15 54.57 +02 20 15.1 13.4 q K46
2015-06-20 21:36:51 C 14 16 09.02 +02 12 24.5 t 160
2015-06-20 21:39:03 C 14 16 10.00 +02 11 52.8 t 160
2015-06-20 21:41:16 C 14 16 11.00 +02 11 20.5 t 160
2015-06-20 22:06:09 C 14 16 22.38 +02 05 12.2 13.7 q K46
2015-06-21 04:44:28 C 14 19 18.85 +00 33 13.3 P V78
2015-06-21 04:47:13 C 14 19 19.93 +00 32 35.8 P V78
2015-06-21 04:49:31 C 14 19 20.89 +00 32 05.0 P V78
2015-06-21 05:09:56 C 14 19 29.59 +00 27 51.5 q 448
2015-06-21 05:18:25 C 14 19 32.99 +00 25 59.3 q 448
2015-06-21 05:25:10 C 14 19 35.71 +00 24 30.1 q 448
2015-06-21 05:33:54 C 14 19 39.21 +00 22 35.1 q 448
2015-06-21 05:42:09 C 14 19 42.51 +00 20 46.6 q 448
2015-06-21 20:36:24 C 14 25 28.43 -02 38 27.5 q K14
2015-06-21 20:46:33 C 14 25 31.80 -02 40 18.7 q K14
2015-06-21 20:56:17 C 14 25 35.05 -02 42 05.2 q K14
2015-06-21 21:08:23 C 14 25 39.06 -02 44 16.8 q K14
2015-06-21 21:18:29 C 14 25 42.41 -02 46 07.0 q K14
2015-06-21 21:55:33 C 14 25 55.47 -02 52 51.6 u I61
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)