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
1996-06-15 08:35:15 C 19 14 23.61 -17 28 30.7 z 684
1996-06-15 08:36:46 C 19 14 22.10 -17 28 40.8 z 684
1996-06-15 12:14:36 C 19 10 44.42 -17 52 40.5 q 566
1996-06-15 12:41:19 C 19 10 17.52 -17 55 35.2 q 566
1996-06-15 12:59:34 C 19 09 59.14 -17 57 34.2 q 566
1996-06-19 13:56:43 C 17 54 42.20 -24 53 07.2 z 423
1996-06-19 14:07:04 C 17 54 35.94 -24 53 33.7 z 423
1996-06-19 14:36:34 C 17 54 18.12 -24 54 48.9 z 423
1996-06-19 14:57:20 C 17 54 05.72 -24 55 43.2 z 423
1996-06-19 15:05:55 C 17 54 00.46 -24 56 04.5 z 423
1996-06-19 15:34:42 C 17 53 43.28 -24 57 17.2 z 423
1996-06-20 13:43:48 C 17 41 34.82 -25 48 12.2 z 423
1996-06-20 14:05:27 C 17 41 23.30 -25 48 54.9 z 423
1996-06-20 14:58:13 C 17 40 55.54 -25 50 42.2 z 423
1996-06-20 15:20:19 C 17 40 43.93 -25 51 27.3 z 423
1996-06-21 12:31:45 C 17 30 30.36 -26 31 05.2 q 566
1996-06-21 12:57:24 C 17 30 18.43 -26 31 46.6 q 566
1996-06-22 12:12:14 C 17 20 25.78 -27 06 26.4 q 566
1996-06-22 12:40:39 C 17 20 14.21 -27 07 02.8 q 566
1996-06-22 13:05:00 C 17 20 04.32 -27 07 33.6 q 566
1996-06-24 07:12:35 C 17 05 08.65 -27 54 26.0 z 696
1996-06-24 07:14:15 C 17 05 08.08 -27 54 27.5 z 696
1996-06-24 07:15:55 C 17 05 07.58 -27 54 28.9 z 696
1996-06-25 06:58:32 C 16 58 03.56 -28 14 12.2 z 696
1996-06-25 07:00:31 C 16 58 03.00 -28 14 13.9 z 696
1996-06-25 07:02:28 C 16 58 02.43 -28 14 15.3 z 696
1996-06-29 04:52:59 C 16 37 03.90 -29 04 25.4 z 670
1996-06-29 05:05:00 C 16 37 01.72 -29 04 29.2 z 670
1996-06-29 05:12:00 C 16 37 00.48 -29 04 32.1 z 670
1996-06-29 05:30:59 C 16 36 56.99 -29 04 39.5 z 670
1996-06-29 05:55:59 C 16 36 52.35 -29 04 47.8 z 670
1996-07-04 04:41:00 C 16 20 50.79 -29 35 11.4 z 670
1996-07-04 04:47:29 C 16 20 50.06 -29 35 13.3 z 670
1996-07-04 04:57:59 C 16 20 48.95 -29 35 15.4 z 670
1996-07-04 05:13:30 C 16 20 47.34 -29 35 18.1 z 670
1996-07-04 05:27:29 C 16 20 45.73 -29 35 21.0 z 670
1996-07-04 05:45:29 C 16 20 43.91 -29 35 23.1 z 670
2000-07-29 16:00:21 C 01 12 39.30 -43 34 51.2 c 474
2000-07-29 16:02:41 C 01 12 39.57 -43 34 56.3 c 474
2000-07-29 16:07:47 C 01 12 40.16 -43 35 07.4 c 474
2000-08-15 06:58:45 C 02 36 20.60 -62 21 01.1 860
2000-08-15 07:01:06 C 02 36 21.44 -62 21 11.0 860
2000-08-20 07:59:12 C 03 40 52.13 -68 52 59.2 z 859
2000-08-20 08:02:17 C 03 40 54.28 -68 53 07.6 z 859
2000-08-20 08:08:50 C 03 40 58.58 -68 53 27.8 z 859
2000-08-21 04:33:55 C 03 56 27.18 -69 52 15.5 z 859
2000-08-21 04:38:42 C 03 56 31.24 -69 52 29.9 z 859
2000-08-21 04:58:07 C 03 56 47.13 -69 53 24.7 z 859
2000-08-25 07:41:32 C 05 36 30.60 -73 14 26.3 860
2000-08-25 07:43:20 C 05 36 32.76 -73 14 27.7 860
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)