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
2015-07-17 09:48:36 C 15 23 55.39 -25 36 42.3 v Q68
2015-07-17 10:57:52 C 15 23 58.36 -25 37 14.7 v Q68
2015-07-17 12:09:05 C 15 24 01.54 -25 37 47.9 v Q68
2015-07-31 02:16:18 C 15 39 41.76 -27 32 36.2 u 807
2015-07-31 02:19:52 C 15 39 41.92 -27 32 37.5 u 807
2015-07-31 02:23:28 C 15 39 42.07 -27 32 38.6 u 807
2015-07-31 02:27:02 C 15 39 42.25 -27 32 39.9 u 807
2015-07-31 02:30:36 C 15 39 42.46 -27 32 40.8 u 807
2018-07-26 14:29:13 C 03 49 49.17 -17 43 05.2 U T05
2018-07-26 14:40:34 C 03 49 52.81 -17 42 59.0 U T05
2018-07-26 14:47:43 C 03 49 55.06 -17 42 55.8 U T05
2018-07-26 14:51:44 C 03 49 56.34 -17 42 53.6 U T05
2019-07-01 13:34:49 C 23 54 14.69 -29 43 16.6 V T05
2019-07-01 13:40:07 C 23 54 14.93 -29 43 21.8 V T05
2019-07-01 13:49:52 C 23 54 15.39 -29 43 29.7 V T05
2019-07-01 14:11:01 C 23 54 16.35 -29 43 47.4 V T05
2019-07-07 13:17:00 C 00 01 12.23 -31 58 02.2 V T05
2019-07-07 13:21:43 C 00 01 12.37 -31 58 08.1 V T05
2019-07-07 13:49:50 C 00 01 13.71 -31 58 37.0 V T05
2019-07-07 14:02:31 C 00 01 14.27 -31 58 50.6 V T05
2019-07-07 14:07:17 C 00 01 14.42 -31 58 55.7 V T05
2019-07-07 14:17:52 C 00 01 14.93 -31 59 06.7 V T05
2019-07-07 14:37:40 C 00 01 15.81 -31 59 27.3 V T05
2019-07-10 13:55:14 C 00 04 35.78 -33 17 58.9 V T05
2019-07-10 13:59:51 C 00 04 36.05 -33 18 03.7 V T05
2019-07-10 14:10:16 C 00 04 36.44 -33 18 15.8 V T05
2019-07-10 14:26:21 C 00 04 37.14 -33 18 34.7 V T05
2019-07-17 13:05:05 C 00 12 03.77 -36 57 30.1 V T05
2019-07-17 13:05:44 C 00 12 03.82 -36 57 31.0 V T05
2019-07-17 13:06:24 C 00 12 03.84 -36 57 32.5 V T05
2019-07-17 13:19:02 C 00 12 04.34 -36 57 50.9 V T05
2019-07-27 12:39:23 C 00 21 39.24 -43 58 54.6 V T08
2019-07-27 12:47:49 C 00 21 39.49 -43 59 12.3 V T08
2019-07-27 12:54:18 C 00 21 39.71 -43 59 25.9 V T08
2019-07-27 13:08:46 C 00 21 40.14 -43 59 56.3 V T08
2019-08-31 09:36:41 S 19 09 31.306 -88 22 00.73 L C51
2019-08-31 14:19:15 S 18 24 05.352 -88 21 08.35 L C51
2019-08-31 17:27:34 S 17 54 59.566 -88 18 26.89 L C51
2020-06-27 13:11:10 C 22 43 32.64 -33 05 11.1 V T08
2020-06-27 13:13:49 C 22 43 32.56 -33 05 14.5 V T08
2020-06-27 13:18:27 C 22 43 32.55 -33 05 17.8 V T08
2020-06-27 13:35:17 C 22 43 32.26 -33 05 33.9 V T08
2020-07-01 13:42:28 C 22 41 48.151 -34 40 46.73 U F51
2020-07-01 13:55:30 C 22 41 47.816 -34 41 00.33 U F51
2020-07-01 14:08:27 C 22 41 47.481 -34 41 13.78 U F51
2020-07-01 14:21:26 C 22 41 47.139 -34 41 27.25 U F51
2020-07-15 17:23:23 C 22 25 59.31 -41 26 32.7 V Q62
2020-07-15 17:27:15 C 22 25 59.02 -41 26 37.8 V Q62
2020-07-15 17:31:06 C 22 25 58.73 -41 26 42.8 V Q62
2020-07-18 00:45:12 C 22 21 34.98 -42 40 57.8 o K95
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)