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
1968-06-16 22:09:06 A 14 53 01.33 +19 55 20.4 999
1968-06-16 22:09:59 A 14 52 59.34 +19 54 34.3 056
1968-06-16 22:12:00 A 14 52 59.94 +19 53 26.8 056
1968-06-16 22:14:00 A 14 53 00.56 +19 52 20.0 056
1968-06-16 22:16:00 A 14 53 01.17 +19 51 13.5 056
1968-06-16 22:30:32 A 14 53 07.43 +19 43 16.4 999
1968-06-16 22:40:01 A 14 53 10.49 +19 37 51.4 999
1968-06-17 02:50:05 A 14 54 29 +17 24.9 774
1968-06-17 03:57:10 A 14 54 51.90 +16 48 23.2 693
1968-06-17 04:00:09 A 14 54 52.67 +16 46 50.1 693
1968-06-17 04:18:08 A 14 54 58.03 +16 37 36.4 675
1968-06-17 21:31:50 A 14 59 02 +08 58.9 073
1968-06-17 22:12:00 A 14 59 10.03 +08 43 19.0 056
1968-06-17 22:14:00 A 14 59 10.43 +08 42 33.3 056
1968-06-17 22:16:00 A 14 59 10.83 +08 41 47.1 056
1968-06-17 22:18:00 A 14 59 11.22 +08 41 01.7 056
1968-06-17 22:42:35 A 14 59 24.45 +08 34 30.3 822
1968-06-17 22:48:35 A 14 59 25.47 +08 32 15.4 822
1968-06-17 23:56:05 A 14 59 36.90 +08 07 11.4 822
1968-06-17 23:58:36 A 14 59 37.33 +08 06 14.5 822
1968-06-17 23:58:50 A 14 59 29.87 +08 03 22.0 13.5 024
1968-06-18 00:51:21 A 14 59 45.84 +07 46 56.9 822
1968-06-18 00:56:20 A 14 59 46.63 +07 45 07.6 822
1968-06-18 01:01:20 A 14 59 47.42 +07 43 19.5 822
1968-06-18 01:06:21 A 14 59 48.22 +07 41 30.2 822
1968-06-18 01:11:21 A 14 59 49.03 +07 39 42.6 822
1968-06-18 01:16:20 A 14 59 49.80 +07 37 54.0 822
1968-06-18 01:21:20 A 14 59 50.59 +07 36 06.6 822
1968-06-18 01:26:21 A 14 59 51.40 +07 34 18.2 822
1968-06-18 01:31:21 A 14 59 52.22 +07 32 30.4 822
1968-06-18 01:36:18 A 14 59 52.97 +07 30 43.2 822
1968-06-18 01:41:20 A 14 59 53.76 +07 28 54.0 822
1968-06-18 01:46:20 A 14 59 54.53 +07 27 07.1 822
1968-06-18 01:51:16 A 14 59 55.31 +07 25 22.4 822
1968-06-18 01:56:21 A 14 59 56.23 +07 23 34.0 822
1968-06-18 04:18:08 A 15 00 24.38 +06 31 41.0 675
1968-06-18 06:17:47 A 15 00 42.74 +05 51 07.2 662
1968-06-18 06:23:49 A 15 00 43.60 +05 49 06.3 662
1968-06-18 12:20:14 A 15 01 43.84 +03 56 08.8 395
1968-06-18 12:41:14 A 15 01 46.79 +03 49 38.0 395
1968-06-18 13:43:59 A 15 01 55.40 +03 30 47.2 395
1968-06-18 14:42:55 A 15 02 03.32 +03 13 51.4 15.0 370
1968-06-18 20:01:59 A 15 02 53.78 +01 46 32.1 051
1968-06-18 21:16:35 A 15 03 01.49 +01 24 19.8 095
1968-06-18 21:42:51 A 15 03 04.73 +01 17 21.6 095
1968-06-18 21:50:18 A 15 03 05.27 +01 15 26.6 095
1968-06-18 22:19:33 A 15 03 09.15 +01 07 54.4 095
1968-06-18 22:22:53 A 15 03 09.41 +01 07 07.7 095
1968-06-18 22:51:26 A 15 03 21.33 +01 01 47.0 822
1968-06-18 22:55:26 A 15 03 21.77 +01 00 44.9 822
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)