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
2013-06-12 09:31:19 C 20 52 57.54 -02 42 18.7 u G96
2013-06-12 09:37:39 C 20 52 57.64 -02 42 14.7 u G96
2013-06-12 09:44:04 C 20 52 57.61 -02 42 10.7 u G96
2013-06-12 09:50:30 C 20 52 57.68 -02 42 07.4 u G96
2013-07-31 20:14:45 C 19 15 00.13 +07 41 54.7 q C95
2013-07-31 20:22:54 C 19 14 58.11 +07 41 55.7 q C95
2013-07-31 20:31:04 C 19 14 56.12 +07 41 57.0 q C95
2013-07-31 20:39:14 C 19 14 54.13 +07 41 58.3 q C95
2013-08-01 20:44:57 C 19 09 07.81 +07 45 17.9 q C27
2013-08-01 20:52:00 C 19 09 06.05 +07 45 18.9 q C27
2013-08-01 20:56:03 C 19 09 05.02 +07 45 19.0 q C27
2013-08-01 22:01:18 C 19 08 48.30 +07 45 27.3 q C27
2013-08-01 22:06:42 C 19 08 46.90 +07 45 27.7 q C27
2013-08-01 22:12:07 C 19 08 45.51 +07 45 28.5 q C27
2013-08-04 20:28:41 C 18 50 46.32 +07 48 52.9 q C77
2013-08-04 20:32:09 C 18 50 45.35 +07 48 52.4 q C77
2013-08-04 20:35:50 C 18 50 44.31 +07 48 52.7 q C77
2013-08-04 20:39:49 C 18 50 43.20 +07 48 52.7 q C77
2013-08-04 20:49:14 C 18 50 40.90 +07 48 54.2 q C27
2013-08-04 21:43:55 C 18 50 25.51 +07 48 53.5 q C27
2013-08-05 02:00:10 C 18 49 17.93 +07 48 48.3 u H21
2013-08-05 02:03:29 C 18 49 17.00 +07 48 48.3 u H21
2013-08-05 02:06:33 C 18 49 16.12 +07 48 48.2 u H21
2013-08-05 02:11:32 C 18 49 14.73 +07 48 48.3 u H21
2013-08-05 21:19:40 C 18 44 00.41 +07 47 47.3 q 203
2013-08-05 22:14:40 C 18 43 44.55 +07 47 43.7 q 203
2013-08-06 22:39:58 C 18 36 54.90 +07 45 32.0 q Z81
2013-08-06 23:56:29 C 18 36 32.17 +07 45 21.8 q Z81
2013-08-08 20:43:22 C 18 23 34.46 +07 37 37.7 q C27
2013-08-08 22:14:00 C 18 23 06.30 +07 37 17.8 q C27
2013-08-12 20:55:45 C 17 53 52.16 +07 06 30.9 q 203
2013-08-12 21:55:36 C 17 53 32.30 +07 06 04.0 q 203
2013-08-14 03:17:15 C 17 44 04.63 +06 52 44.0 u H21
2013-08-14 03:21:41 C 17 44 03.13 +06 52 41.8 u H21
2013-08-14 03:25:25 C 17 44 01.85 +06 52 40.0 u H21
2013-08-14 03:29:21 C 17 44 00.52 +06 52 38.0 u H21
2013-08-14 03:33:36 C 17 43 59.07 +06 52 35.6 u H21
2013-08-14 03:39:02 C 17 43 57.22 +06 52 33.1 u H21
2013-08-14 03:41:44 C 17 43 56.29 +06 52 31.9 u H21
2013-08-14 03:43:36 C 17 43 55.67 +06 52 31.0 u H21
2013-08-22 01:31:48 C 16 39 46.90 +04 47 55.1 u H21
2013-08-22 01:37:10 C 16 39 44.98 +04 47 51.0 u H21
2013-08-22 01:42:30 C 16 39 43.05 +04 47 47.0 u H21
2013-08-22 01:47:46 C 16 39 41.14 +04 47 42.5 u H21
2013-08-22 01:53:00 C 16 39 39.25 +04 47 38.3 u H21
2014-08-14 06:21:39 C 16 44 05.233 -07 12 22.21 L F51
2014-08-14 06:39:20 C 16 44 03.961 -07 12 31.91 L F51
2014-08-14 06:57:08 C 16 44 02.690 -07 12 41.53 L F51
2014-08-14 07:14:52 C 16 44 01.422 -07 12 51.28 L F51
2014-08-15 06:38:37 C 16 42 33.792 -07 25 42.12 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)