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
2016-07-06 07:48:23 C 15 51 34.320 -05 07 09.51 L F51
2016-07-06 08:22:49 C 15 51 32.280 -05 07 17.50 L F51
2017-05-18 08:21:52 C 16 36 10.25 -05 47 08.1 q G96
2017-05-18 08:29:31 C 16 36 09.17 -05 47 03.7 q G96
2017-05-18 08:37:11 C 16 36 08.17 -05 46 59.6 q G96
2017-05-22 11:29:18 C 16 23 10.987 -04 56 15.60 L F51
2017-05-22 11:47:39 C 16 23 08.458 -04 56 06.79 L F51
2017-05-22 12:05:55 C 16 23 05.943 -04 55 58.00 L F51
2017-05-22 12:24:17 C 16 23 03.414 -04 55 49.15 L F51
2017-05-27 15:46:40 C 16 07 04.56 -04 03 08.4 q D29
2017-05-27 16:07:01 C 16 07 01.77 -04 03 01.1 q D29
2017-05-27 16:27:23 C 16 06 59.13 -04 02 52.9 q D29
2017-06-16 05:36:34 C 15 19 35.25 -02 51 24.3 q G96
2017-06-16 05:42:39 C 15 19 34.73 -02 51 25.3 q G96
2017-06-16 05:48:41 C 15 19 34.31 -02 51 25.1 q G96
2017-06-16 05:54:45 C 15 19 33.87 -02 51 25.9 q G96
2017-06-16 06:02:38 C 15 19 33.27 -02 51 25.9 q G96
2017-06-16 06:09:54 C 15 19 32.78 -02 51 26.2 q G96
2017-06-16 06:16:16 C 15 19 32.31 -02 51 26.8 q G96
2017-06-16 06:22:58 C 15 19 31.77 -02 51 28.1 q G96
2018-04-13 12:47:32 C 16 50 23.203 -11 17 44.42 U F51
2018-04-13 13:19:25 C 16 50 19.810 -11 17 17.10 U F51
2018-04-13 13:35:23 C 16 50 18.100 -11 17 03.26 U F51
2018-04-16 11:04:37 C 16 43 03.13 -10 16 18.9 U G96
2018-04-16 11:13:24 C 16 43 02.06 -10 16 11.4 U G96
2018-04-16 11:22:12 C 16 43 01.05 -10 16 03.2 U G96
2018-04-16 11:30:59 C 16 43 00.04 -10 15 54.9 U G96
2018-05-08 09:51:47 C 15 31 52.38 -02 52 03.3 U 703
2018-05-08 09:59:31 C 15 31 51.28 -02 51 58.1 U 703
2018-05-08 10:07:15 C 15 31 50.15 -02 51 53.5 U 703
2018-05-08 17:36:13 C 15 30 47.56 -02 46 52.4 q D29
2018-05-08 17:56:35 C 15 30 44.59 -02 46 39.0 q D29
2018-05-12 08:59:42 C 15 18 50.25 -01 53 05.8 U 703
2018-05-12 09:07:19 C 15 18 49.16 -01 53 00.8 U 703
2018-05-12 09:14:55 C 15 18 48.19 -01 52 57.5 U 703
2018-05-12 09:22:33 C 15 18 47.07 -01 52 52.9 U 703
2018-05-13 07:15:43 C 15 15 55.11 -01 40 53.4 U G96
2018-05-13 07:23:09 C 15 15 54.10 -01 40 49.2 U G96
2018-05-13 07:30:34 C 15 15 53.09 -01 40 45.0 U G96
2018-05-13 07:38:02 C 15 15 52.06 -01 40 41.0 U G96
2018-05-15 07:58:57 C 15 09 42.02 -01 16 21.1 U 703
2018-05-15 08:06:31 C 15 09 41.04 -01 16 17.3 U 703
2018-05-15 08:21:40 C 15 09 39.04 -01 16 10.4 U 703
2018-05-16 07:42:19 C 15 06 47.02 -01 05 31.2 U G96
2018-05-16 07:49:45 C 15 06 46.07 -01 05 27.9 U G96
2018-05-16 07:57:13 C 15 06 45.12 -01 05 24.8 U G96
2018-05-16 08:04:42 C 15 06 44.19 -01 05 21.7 U G96
2019-03-27 13:59:56 C 16 35 14.30 -13 35 30.0 V T05
2019-03-27 14:02:37 C 16 35 13.52 -13 35 24.9 V T05
2019-03-27 14:15:10 C 16 35 10.02 -13 35 00.8 V T05
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)