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
1968-06-21 19:53:44 A 15 09 41.29 -10 35 51.9 051
1968-06-21 20:41:53 A 15 09 44.35 -10 42 23.6 020
1968-06-21 20:51:50 A 15 09 44.82 -10 43 26.1 020
1968-06-21 22:00:27 A 15 09 47.17 -10 50 46.8 095
1968-06-21 22:07:59 A 15 09 48.69 -10 51 40.3 033
1968-06-21 22:09:48 A 15 09 47.57 -10 51 44.4 095
1968-06-21 22:18:00 A 15 09 49.20 -10 52 47.0 033
1968-06-21 22:27:00 A 15 09 49.79 -10 53 43.2 033
1968-06-21 22:34:01 A 15 09 50.12 -10 54 27.0 026
1968-06-21 22:36:59 A 15 09 50.11 -10 54 43.8 033
1968-06-21 22:37:10 A 15 09 50.28 -10 54 42.0 026
1968-06-21 22:39:57 A 15 09 50.43 -10 54 57.8 026
1968-06-21 22:50:12 A 15 09 51.09 -10 56 14.6 012
1968-06-22 01:33:27 A 15 10 03.08 -11 11 41.1 808
1968-06-22 01:34:06 A 15 10 02.78 -11 11 45.5 822
1968-06-22 01:39:06 A 15 10 03.00 -11 12 16.3 822
1968-06-22 01:43:26 A 15 10 03.53 -11 12 42.9 808
1968-06-22 01:44:05 A 15 10 03.21 -11 12 47.5 822
1968-06-22 01:53:23 A 15 10 03.98 -11 13 43.7 808
1968-06-22 05:02:01 A 15 10 15.93 -11 33 51.6 662
1968-06-22 05:15:01 A 15 10 16.51 -11 35 08.7 662
1968-06-22 12:39:29 A 15 10 42.38 -12 17 19.3 371
1968-06-22 12:42:00 A 15 10 42.52 -12 17 33.1 371
1968-06-22 12:45:59 A 15 10 42.71 -12 17 54.1 371
1968-06-22 12:49:30 A 15 10 42.82 -12 18 13.9 371
1968-06-22 12:56:30 A 15 10 43.24 -12 18 51.8 371
1968-06-22 12:58:00 A 15 10 43.32 -12 19 00.1 371
1968-06-22 12:59:30 A 15 10 43.34 -12 19 07.6 371
1968-06-22 13:00:59 A 15 10 43.42 -12 19 16.2 371
1968-06-22 13:02:30 A 15 10 43.46 -12 19 24.5 371
1968-06-22 13:03:59 A 15 10 43.54 -12 19 32.5 371
1968-06-22 13:05:30 A 15 10 43.57 -12 19 40.6 371
1968-06-22 13:07:00 A 15 10 43.62 -12 19 48.4 371
1968-06-22 13:08:30 A 15 10 43.68 -12 19 56.0 371
1968-06-22 13:18:30 A 15 10 44.13 -12 20 51.6 371
1968-06-22 13:20:00 A 15 10 44.17 -12 20 59.3 371
1968-06-22 13:21:30 A 15 10 44.25 -12 21 07.6 371
1968-06-22 13:23:00 A 15 10 44.31 -12 21 16.0 371
1968-06-22 13:24:29 A 15 10 44.39 -12 21 23.5 371
1968-06-22 13:25:59 A 15 10 44.47 -12 21 31.7 371
1968-06-22 13:27:30 A 15 10 44.50 -12 21 40.8 371
1968-06-22 13:29:00 A 15 10 44.56 -12 21 48.8 371
1968-06-22 13:30:30 A 15 10 44.60 -12 21 57.4 371
1968-06-22 13:39:44 A 15 10 45.13 -12 22 47.8 371
1968-06-22 13:41:30 A 15 10 45.21 -12 22 57.9 371
1968-06-22 13:43:00 A 15 10 45.32 -12 23 06.2 371
1968-06-22 13:44:27 A 15 10 45.32 -12 23 12.9 371
1968-06-22 13:45:59 A 15 10 45.41 -12 23 22.4 371
1968-06-22 13:47:30 A 15 10 45.44 -12 23 30.4 371
1968-06-22 13:48:59 A 15 10 45.50 -12 23 37.6 371
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)