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
2020-04-06 20:50:32 C 09 29 37.61 +24 43 13.6 V 130
2020-04-09 00:23:04 C 09 49 32.02 +23 33 30.5 V 204
2020-04-09 00:28:31 C 09 49 33.91 +23 33 22.2 V 204
2020-04-09 00:33:59 C 09 49 35.79 +23 33 15.0 V 204
2020-04-09 07:38:50 C 09 52 03.89 +23 24 39.3 V T08
2020-04-09 07:42:54 C 09 52 05.21 +23 24 33.9 V T08
2020-04-09 07:52:23 C 09 52 08.20 +23 24 21.5 V T08
2020-04-09 08:07:06 C 09 52 12.89 +23 24 01.2 V T08
2020-04-10 20:51:31 C 10 03 47.49 +22 36 35.2 V A16
2020-04-10 21:07:05 C 10 03 51.87 +22 36 15.7 V A16
2020-04-10 21:22:39 C 10 03 56.21 +22 35 56.3 V A16
2020-04-10 21:38:12 C 10 04 00.57 +22 35 36.3 V A16
2020-04-11 05:38:11 C 10 06 18.54 +22 25 57.9 V 703
2020-04-11 05:53:21 C 10 06 22.63 +22 25 38.3 V 703
2020-04-11 06:00:56 C 10 06 24.55 +22 25 28.2 V 703
2020-04-12 07:41:29 C 10 13 23.87 +21 54 45.4 V T05
2020-04-12 08:27:04 C 10 13 34.87 +21 53 49.9 V T05
2020-04-12 08:34:24 C 10 13 36.65 +21 53 41.7 V T05
2020-04-12 09:01:50 C 10 13 43.23 +21 53 08.1 V T05
2020-04-14 09:29:04 C 10 25 15.97 +20 58 00.9 V T08
2020-04-14 09:33:45 C 10 25 16.94 +20 57 55.2 V T08
2020-04-14 09:34:24 C 10 25 17.08 +20 57 54.5 V T08
2020-04-14 09:38:31 C 10 25 17.94 +20 57 50.1 V T08
2020-04-14 09:41:50 C 10 25 18.62 +20 57 45.5 V T08
2020-04-14 09:46:28 C 10 25 19.61 +20 57 40.7 V T08
2020-04-14 09:56:21 C 10 25 21.59 +20 57 29.7 V T08
2020-04-14 10:01:14 C 10 25 22.70 +20 57 23.9 V T08
2020-04-15 13:59:43 C 10 31 18.04 +20 27 17.3 q D29
2020-04-15 14:20:04 C 10 31 21.90 +20 26 55.5 q D29
2020-04-15 14:40:26 C 10 31 25.75 +20 26 33.5 q D29
2020-04-16 05:41:02 C 10 34 23.70 +20 11 00.9 V 703
2020-04-16 05:49:14 C 10 34 25.17 +20 10 52.7 V 703
2020-04-16 05:57:27 C 10 34 26.69 +20 10 44.2 V 703
2020-04-16 06:05:39 C 10 34 28.19 +20 10 35.5 V 703
2020-04-16 08:35:56 C 10 34 57.337 +20 08 12.47 U F51
2020-04-16 08:54:35 C 10 35 00.652 +20 07 52.96 U F51
2020-04-16 09:13:16 C 10 35 03.979 +20 07 33.41 U F51
2020-04-18 08:00:17 C 10 43 29.05 +19 21 28.2 V T08
2020-04-18 08:04:23 C 10 43 29.71 +19 21 24.7 V T08
2020-04-18 08:18:54 C 10 43 31.92 +19 21 10.4 V T08
2020-04-18 08:29:45 C 10 43 33.56 +19 20 59.2 V T08
2020-04-19 05:06:51 C 10 46 57.21 +19 01 26.7 V 703
2020-04-19 05:15:08 C 10 46 58.51 +19 01 18.8 V 703
2020-04-19 05:23:24 C 10 46 59.73 +19 01 11.4 V 703
2020-04-19 05:31:40 C 10 47 00.98 +19 01 03.0 V 703
2020-04-21 05:57:54 C 10 54 20.70 +18 17 30.2 V G96
2020-04-21 06:05:22 C 10 54 21.70 +18 17 23.6 V G96
2020-04-21 06:12:48 C 10 54 22.68 +18 17 16.9 V G96
2020-04-21 06:20:16 C 10 54 23.69 +18 17 10.2 V G96
2020-04-23 05:52:34 C 11 00 53.07 +17 36 48.5 V 703
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)