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
2015-06-23 02:30:01 C 14 34 30.21 -07 16 29.8 u H21
2015-06-23 02:31:59 C 14 34 30.69 -07 16 45.0 u H21
2015-06-23 02:33:32 C 14 34 31.07 -07 16 57.2 u H21
2015-06-23 04:30:12 C 14 34 59.45 -07 32 00.4 q H45
2015-06-23 04:31:36 C 14 34 59.79 -07 32 11.2 q H45
2015-06-23 04:33:06 C 14 35 00.15 -07 32 22.5 q H45
2015-06-23 04:34:45 C 14 35 00.54 -07 32 35.1 q H45
2015-06-23 04:36:03 C 14 35 00.86 -07 32 45.5 q H45
2015-06-23 04:37:25 C 14 35 01.19 -07 32 55.8 q H45
2015-06-23 04:38:43 C 14 35 01.49 -07 33 05.8 q H45
2015-06-23 04:40:05 C 14 35 01.82 -07 33 16.2 q H45
2015-06-23 04:41:12 C 14 35 02.09 -07 33 24.6 q H45
2015-06-23 04:42:34 C 14 35 02.41 -07 33 35.2 q H45
2015-06-23 19:14:33 C 14 38 31.40 -09 17 31.1 13.3 t 073
2015-06-23 19:24:04 C 14 38 33.36 -09 18 34.2 13.3 t 073
2015-06-23 19:33:36 C 14 38 35.35 -09 19 37.6 13.5 t 073
2015-06-23 19:43:50 C 14 38 37.53 -09 20 45.3 13.5 t 073
2015-06-23 19:54:04 C 14 38 39.75 -09 21 52.2 13.5 t 073
2015-06-23 20:04:26 C 14 38 41.77 -09 23 00.4 13.6 t 073
2015-06-23 20:14:08 C 14 38 43.78 -09 24 04.2 13.5 t 073
2015-06-23 20:23:40 C 14 38 45.81 -09 25 06.5 13.3 t 073
2015-06-23 20:44:07 C 14 38 50.08 -09 27 21.0 13.6 t 073
2015-06-23 20:53:40 C 14 38 52.10 -09 28 23.1 13.6 t 073
2015-06-23 21:03:55 C 14 38 54.17 -09 29 29.1 13.5 t 073
2015-06-23 21:14:09 C 14 38 56.33 -09 30 35.2 13.6 t 073
2015-06-23 21:23:42 C 14 38 58.31 -09 31 37.1 13.3 t 073
2015-06-23 21:33:53 C 14 39 00.46 -09 32 43.6 13.5 t 073
2015-06-23 21:44:09 C 14 39 02.57 -09 33 50.3 13.5 t 073
2015-06-23 21:49:43 C 14 39 03.75 -09 34 25.9 13.5 t 073
2015-06-23 21:59:24 C 14 39 05.66 -09 35 28.7 11.7 q 089
2015-06-23 22:01:50 C 14 39 06.17 -09 35 44.1 11.7 q 089
2015-06-23 22:03:03 C 14 39 06.44 -09 35 53.0 11.5 q 089
2015-06-23 22:04:16 C 14 39 06.71 -09 36 00.8 11.8 q 089
2015-06-23 22:05:29 C 14 39 06.94 -09 36 08.3 11.8 q 089
2015-06-23 22:06:42 C 14 39 07.22 -09 36 17.0 11.5 q 089
2015-06-23 22:07:55 C 14 39 07.44 -09 36 23.9 12.0 q 089
2015-06-23 22:09:08 C 14 39 07.71 -09 36 32.0 11.8 q 089
2015-06-23 22:10:21 C 14 39 07.96 -09 36 39.1 12.0 q 089
2015-06-24 03:43:54 C 14 40 20.66 -10 11 36.7 P V78
2015-06-24 03:55:16 C 14 40 22.85 -10 12 45.8 P V78
2015-06-24 04:02:21 C 14 40 24.25 -10 13 29.3 P V78
2015-06-24 21:15:02 C 14 43 44.18 -11 50 29.7 q A13
2015-06-24 21:22:49 C 14 43 45.50 -11 51 09.6 q A13
2015-06-24 21:26:01 C 14 43 46.13 -11 51 24.9 q B50
2015-06-24 21:30:10 C 14 43 46.74 -11 51 48.0 q A13
2015-06-24 21:36:58 C 14 43 48.05 -11 52 21.3 r 006
2015-06-24 21:40:10 C 14 43 48.58 -11 52 37.5 r 006
2015-06-24 21:41:49 C 14 43 48.75 -11 52 49.0 q B50
2015-06-24 21:44:31 C 14 43 49.32 -11 53 00.4 r 006
2015-06-24 21:48:10 C 14 43 49.94 -11 53 19.3 r 006
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)