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
2020-04-23 06:00:10 C 11 00 54.01 +17 36 42.4 V 703
2020-04-23 06:07:45 C 11 00 54.96 +17 36 35.2 V 703
2020-04-23 06:15:21 C 11 00 55.80 +17 36 29.6 V 703
2020-04-25 20:42:30 C 11 08 37.34 +16 46 15.7 t 240
2020-04-25 20:44:20 C 11 08 37.55 +16 46 14.9 t 240
2020-04-25 20:45:04 C 11 08 37.69 +16 46 13.5 t 240
2020-04-25 20:49:46 C 11 08 38.09 +16 46 10.0 t 240
2020-04-25 20:53:32 C 11 08 38.51 +16 46 07.5 t 240
2020-04-25 20:54:04 C 11 08 38.56 +16 46 06.6 t 240
2020-04-26 05:44:09 C 11 09 39.33 +16 39 24.7 V 703
2020-04-26 05:51:41 C 11 09 40.03 +16 39 18.8 V 703
2020-04-26 05:59:13 C 11 09 40.91 +16 39 13.4 V 703
2020-04-26 06:06:45 C 11 09 41.71 +16 39 06.3 V 703
2020-05-21 05:32:25 C 12 01 13.04 +10 03 58.5 V G96
2020-05-21 05:39:49 C 12 01 13.54 +10 03 54.1 V G96
2020-05-21 05:47:12 C 12 01 14.05 +10 03 49.3 V G96
2020-05-21 05:54:36 C 12 01 14.55 +10 03 44.8 V G96
2021-04-18 03:27:16 C 08 03 34.80 +23 29 34.4 V G96
2021-04-18 03:35:33 C 08 03 37.45 +23 29 30.8 V G96
2021-04-18 03:43:50 C 08 03 40.10 +23 29 28.0 V G96
2021-04-18 03:52:07 C 08 03 42.83 +23 29 24.5 V G96
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)