4581 Asclepius (1989 FC)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3569482387 ± 2.00e+00
Semi-major axis (a)1.0225524926 AU ± 3.00e+00
Inclination (i)4.91776168° ± 4.00e+00
Long. of Asc. Node (Ω)180.19585809° ± 5.00e+00
Arg. of Perihelion (ω)255.38856496° ± 6.00e+00
Mean Anomaly (M)233.37600149° ± 1.73e-05
Mean Motion (n)0.9531996157°/day ± 4.19e+00
Perihelion dist (q)0.65755418 AU ± 2.81e+00
Aphelion dist (Q)1.38755080 AU ± 4.56e+00
Orbital Period1.03401876 yr ± 4.55e+00
NGA Modelr2
A2-2.75822557e-06 AU/d²
Physical Parameters
H (abs. magnitude)20.74
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-26
RMS Residual0.083″
Uncertainty0
Orbit TypeApollo
MOID0.003607 AU
Observations Used392
Radar Obs Used2
Oppositions1
Arc Total1989-2012
First Observation Used1989-03-31
Last Observation Used2021-04-18
Observations (421)
Date Type RA Dec Mag Band Observatory
2014-08-15 06:56:30 C 16 42 32.558 -07 25 52.00 L F51
2014-08-15 07:14:20 C 16 42 31.348 -07 26 01.62 L F51
2014-08-17 06:13:08 C 16 39 47.432 -07 52 04.09 L F51
2014-08-17 06:30:35 C 16 39 46.335 -07 52 13.83 L F51
2014-08-18 06:09:19 C 16 38 29.623 -08 05 26.56 L F51
2014-08-18 06:26:46 C 16 38 28.566 -08 05 36.30 L F51
2014-08-18 06:44:14 C 16 38 27.524 -08 05 46.04 L F51
2014-08-19 06:07:54 C 16 37 15.481 -08 18 54.50 L F51
2014-08-19 06:25:09 C 16 37 14.484 -08 19 04.09 L F51
2014-08-19 06:42:27 C 16 37 13.490 -08 19 13.75 L F51
2014-08-19 06:59:46 C 16 37 12.496 -08 19 23.48 L F51
2015-06-18 08:39:43 C 17 56 59.43 -04 56 06.3 q G96
2015-06-18 08:47:03 C 17 56 58.48 -04 56 04.6 q G96
2015-06-18 08:54:22 C 17 56 57.54 -04 56 02.5 q G96
2015-06-18 09:05:26 C 17 56 55.97 -04 56 00.3 q G96
2015-07-06 07:08:13 C 17 01 33.656 -04 38 20.10 L F51
2015-07-06 07:23:26 C 17 01 31.837 -04 38 22.07 L F51
2015-07-06 07:38:25 C 17 01 30.028 -04 38 23.86 L F51
2015-07-06 07:53:25 C 17 01 28.209 -04 38 25.80 L F51
2015-07-07 06:39:32 C 16 58 53.672 -04 41 27.86 L F51
2015-07-07 06:55:02 C 16 58 51.861 -04 41 30.08 L F51
2015-07-07 07:10:26 C 16 58 50.038 -04 41 32.31 L F51
2015-07-07 07:25:41 C 16 58 48.213 -04 41 34.52 L F51
2015-08-10 06:35:51 C 16 13 46.687 -09 16 46.05 L F51
2015-08-10 06:53:00 C 16 13 46.555 -09 16 53.61 L F51
2015-08-10 07:09:59 C 16 13 46.419 -09 17 01.18 L F51
2015-08-10 07:27:20 C 16 13 46.304 -09 17 08.85 L F51
2016-06-04 03:04:24 C 17 10 35.63 -05 37 38.1 c J04
2016-06-04 03:21:14 C 17 10 33.41 -05 37 32.3 c J04
2016-06-04 03:38:04 C 17 10 31.11 -05 37 26.6 c J04
2016-06-04 03:54:54 C 17 10 28.93 -05 37 20.8 c J04
2016-06-04 07:55:59 C 17 09 58.65 -05 36 03.4 q G96
2016-06-04 08:05:21 C 17 09 57.38 -05 36 00.3 q G96
2016-06-04 08:10:02 C 17 09 56.78 -05 35 58.2 q G96
2016-06-04 09:40:48 C 17 09 44.63 -05 35 28.2 q G96
2016-06-04 09:43:41 C 17 09 44.23 -05 35 27.5 q G96
2016-06-04 09:46:31 C 17 09 43.84 -05 35 26.6 q G96
2016-06-04 09:49:22 C 17 09 43.47 -05 35 25.2 q G96
2016-06-07 05:17:20 C 17 01 02.12 -05 14 49.9 q I52
2016-06-07 05:34:46 C 17 00 59.78 -05 14 45.7 q I52
2016-06-07 05:45:53 C 17 00 58.28 -05 14 41.9 q I52
2016-06-07 05:53:28 C 17 00 57.27 -05 14 39.9 q I52
2016-06-07 06:06:35 C 17 00 55.01 -05 14 38.6 u H21
2016-06-07 06:16:38 C 17 00 53.67 -05 14 35.6 u H21
2016-06-07 06:24:05 C 17 00 52.68 -05 14 32.8 u H21
2016-06-29 08:53:41 C 16 02 38.884 -04 36 50.34 L F51
2016-06-29 09:08:44 C 16 02 37.625 -04 36 52.29 L F51
2016-06-29 09:23:50 C 16 02 36.355 -04 36 54.22 L F51
2016-06-29 09:38:58 C 16 02 35.096 -04 36 56.19 L F51
2016-07-06 07:31:10 C 15 51 35.341 -05 07 05.76 L F51
Radar Observations (6)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2012-08-06 07:56:00 119238.6871 0.1 Hz 2380 -1 -1
2012-08-06 08:21:00 131311969.46 4 us 2380 -1 -1
2012-08-06.330556 11923869 10 Hz 2380 251 251
2012-08-06.347917 13131196946 4000 us 2380 251 251
2012-08-26 12:57:00 -128003.4908 0.2 Hz 2380 -1 -1
2012-08-26 13:24:00 133312024.34 4 us 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)