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
2012-07-16 14:50:09 C 23 04 04.01 +14 19 13.8 o 474
2012-07-25 07:36:32 C 23 34 48.01 +20 55 20.7 u H36
2012-07-25 07:47:53 C 23 34 50.08 +20 55 46.8 u H36
2012-07-26 01:29:03 C 23 38 10.57 +21 36 29.8 t 130
2012-07-26 01:31:56 C 23 38 11.05 +21 36 36.4 t 130
2012-07-26 01:34:49 C 23 38 11.62 +21 36 42.6 t 130
2012-07-26 01:37:41 C 23 38 12.13 +21 36 50.7 t 130
2012-07-26 02:07:10 C 23 38 17.94 +21 38 02.9 r C07
2012-07-26 02:15:57 C 23 38 19.57 +21 38 22.4 20.2 r C07
2012-07-26 02:17:49 C 23 38 19.98 +21 38 26.7 r C07
2012-07-26 02:28:12 C 23 38 21.92 +21 38 51.4 20.1 r C07
2012-07-26 22:46:51 C 23 42 26.89 +22 27 19.1 r A17
2012-07-26 22:59:27 C 23 42 29.39 +22 27 50.5 r A17
2012-07-26 23:10:41 C 23 42 31.69 +22 28 18.5 r A17
2012-07-28 00:10:39 C 23 47 51.03 +23 30 59.8 u C73
2012-07-28 00:11:48 C 23 47 51.27 +23 31 02.3 u C73
2012-07-28 00:12:58 C 23 47 51.52 +23 31 05.4 u C73
2012-07-28 00:14:07 C 23 47 51.73 +23 31 07.9 u C73
2012-07-28 00:15:16 C 23 47 51.92 +23 31 10.8 u C73
2012-07-28 00:16:26 C 23 47 52.18 +23 31 13.9 u C73
2012-07-28 00:17:35 C 23 47 52.36 +23 31 16.7 u C73
2012-07-28 00:19:54 C 23 47 52.93 +23 31 22.9 u C73
2012-07-28 00:21:04 C 23 47 53.18 +23 31 26.5 u C73
2012-07-28 00:22:13 C 23 47 53.41 +23 31 29.5 u C73
2012-07-28 00:23:22 C 23 47 53.67 +23 31 32.3 u C73
2012-07-28 00:24:31 C 23 47 53.97 +23 31 34.8 u C73
2012-07-28 00:25:40 C 23 47 54.20 +23 31 37.5 u C73
2012-07-28 00:26:49 C 23 47 54.45 +23 31 40.4 u C73
2012-08-02 08:40:11 C 00 23 05.73 +29 43 11.5 u H21
2012-08-02 08:44:49 C 00 23 07.24 +29 43 26.4 u H21
2012-08-02 08:48:55 C 00 23 08.57 +29 43 39.8 u H21
2012-08-02 08:53:10 C 00 23 09.96 +29 43 54.0 u H21
2012-08-06 08:44:59 C 01 02 33.89 +35 14 58.1 u H21
2012-08-06 08:48:17 C 01 02 35.44 +35 15 10.0 u H21
2012-08-06 08:51:34 C 01 02 37.00 +35 15 21.9 u H21
2012-08-06 08:54:52 C 01 02 38.58 +35 15 34.1 u H21
2012-08-06 08:59:29 C 01 02 40.78 +35 15 51.0 u H21
2012-08-07 02:06:57 C 01 11 26.45 +36 17 45.9 c A24
2012-08-07 02:08:26 C 01 11 27.25 +36 17 51.1 c A24
2012-08-07 02:09:55 C 01 11 28.05 +36 17 56.0 c A24
2012-08-09 01:28:56 C 01 39 05.75 +39 08 09.5 o J13
2012-08-09 01:29:34 C 01 39 06.17 +39 08 11.9 o J13
2012-08-09 01:30:13 C 01 39 06.69 +39 08 15.0 o J13
2012-08-09 01:30:52 C 01 39 06.85 +39 08 16.1 o J13
2012-08-09 01:52:19 C 01 39 18.00 +39 09 27.8 c A24
2012-08-09 01:53:48 C 01 39 18.92 +39 09 33.3 c A24
2012-08-09 01:55:17 C 01 39 19.87 +39 09 38.1 c A24
2012-08-09 02:08:26 C 01 39 28.07 +39 10 25.6 c A24
2012-08-09 02:53:52 C 01 39 56.32 +39 13 08.1 c A24
2012-08-09 02:55:21 C 01 39 57.27 +39 13 12.6 c A24
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)