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
2015-06-24 21:52:35 C 14 43 50.70 -11 53 41.8 r 006
2015-06-24 21:57:29 C 14 43 51.40 -11 54 09.1 q A13
2015-06-24 22:03:07 C 14 43 52.34 -11 54 41.2 q B50
2015-06-24 22:10:02 C 14 43 53.52 -11 55 16.2 q B50
2015-06-24 22:27:26 C 14 43 56.47 -11 56 43.4 q A13
2015-06-24 23:12:23 C 14 44 04.13 -12 00 34.5 14.5 q K46
2015-06-24 23:22:24 C 14 44 05.84 -12 01 25.4 14.7 q K46
2015-06-25 02:22:14 C 14 44 39.57 -12 16 30.4 u H21
2015-06-25 02:24:00 C 14 44 39.84 -12 16 39.3 u H21
2015-06-25 02:25:58 C 14 44 40.17 -12 16 49.1 u H21
2015-06-25 02:27:55 C 14 44 40.48 -12 16 59.0 u H21
2015-06-25 02:29:53 C 14 44 40.80 -12 17 08.7 u H21
2015-06-25 02:31:51 C 14 44 41.11 -12 17 18.3 u H21
2015-06-25 02:33:48 C 14 44 41.44 -12 17 28.0 u H21
2015-06-25 02:35:46 C 14 44 41.75 -12 17 37.9 u H21
2015-06-25 02:37:43 C 14 44 42.06 -12 17 47.6 u H21
2015-06-25 02:39:40 C 14 44 42.37 -12 17 57.4 u H21
2015-06-25 02:42:01 C 14 44 42.74 -12 18 08.8 u H21
2015-06-25 21:12:17 C 14 47 43.31 -13 43 18.1 q C23
2015-06-25 21:14:16 C 14 47 43.55 -13 43 26.1 q C23
2015-06-25 21:16:43 C 14 47 43.92 -13 43 36.7 q C23
2015-06-25 21:19:25 C 14 47 44.31 -13 43 48.1 q C23
2015-06-25 21:21:53 C 14 47 44.67 -13 43 58.6 q C23
2015-06-27 01:45:28 C 14 51 43.00 -15 31 17.0 14.8 q W89
2015-06-27 01:52:02 C 14 51 43.77 -15 31 39.4 14.8 q W89
2015-06-27 01:58:34 C 14 51 44.53 -15 32 01.6 14.8 q W89
2015-06-27 02:29:26 C 14 51 48.12 -15 33 46.5 14.9 q W89
2015-06-27 02:36:03 C 14 51 48.90 -15 34 09.0 14.8 q W89
2015-06-27 03:26:51 C 14 51 54.80 -15 37 00.0 14.8 q W89
2015-06-27 03:35:31 C 14 51 55.81 -15 37 29.1 14.9 q W89
2015-06-29 21:27:51 C 14 59 01.79 -18 37 40.3 q C23
2015-06-29 21:31:09 C 14 59 02.01 -18 37 47.4 q C23
2015-06-29 21:34:02 C 14 59 02.27 -18 37 53.4 q C23
2015-06-29 21:37:20 C 14 59 02.56 -18 38 00.7 q C23
2015-06-29 21:40:13 C 14 59 02.82 -18 38 07.0 q C23
2015-06-30 01:02:33 C 14 59 22.02 -18 44 45.6 15.3 q W89
2015-06-30 01:11:39 C 14 59 22.74 -18 45 05.4 15.4 q W89
2015-06-30 01:21:13 C 14 59 23.51 -18 45 26.0 15.3 q W89
2015-06-30 02:04:27 C 14 59 27.01 -18 46 58.3 15.4 q W89
2015-06-30 02:13:36 C 14 59 27.74 -18 47 17.8 15.4 q W89
2015-06-30 02:22:53 C 14 59 28.50 -18 47 37.5 15.4 q W89
2015-06-30 04:16:24 C 14 59 37.78 -18 51 36.1 15.4 q W89
2015-06-30 04:25:40 C 14 59 38.54 -18 51 55.4 15.4 q W89
2015-06-30 05:08:03 C 14 59 42.09 -18 53 23.2 15.4 q W89
2015-06-30 05:17:12 C 14 59 42.87 -18 53 42.1 15.5 q W89
2015-06-30 20:40:18 C 15 01 04.49 -19 25 20.5 c K14
2015-06-30 22:01:53 C 15 01 10.70 -19 27 56.2 c K14
2015-07-01 21:31:02 C 15 03 04.06 -20 10 10.8 q C23
2015-07-01 21:36:15 C 15 03 04.54 -20 10 17.7 q C23
2015-07-01 21:45:57 C 15 03 05.22 -20 10 36.3 q C23
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)