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
2019-04-17 11:29:35 C 14 35 51.46 +00 43 42.6 V T05
2019-04-17 11:44:02 C 14 35 48.58 +00 43 59.8 V T05
2019-04-17 11:58:44 C 14 35 45.61 +00 44 17.6 V T05
2019-04-17 12:13:07 C 14 35 42.70 +00 44 34.2 V T05
2019-04-23 11:08:49 C 14 11 25.56 +03 06 11.3 V T08
2019-04-23 11:21:41 C 14 11 23.56 +03 06 21.2 V T08
2019-04-23 11:35:32 C 14 11 21.35 +03 06 32.1 V T08
2019-04-23 11:48:35 C 14 11 19.19 +03 06 42.7 V T08
2019-04-26 08:30:40 C 14 01 35.21 +03 55 56.2 V 703
2019-04-26 08:38:15 C 14 01 34.05 +03 56 01.6 V 703
2019-04-26 08:45:49 C 14 01 33.03 +03 56 06.4 V 703
2019-04-26 08:53:24 C 14 01 31.98 +03 56 10.9 V 703
2019-04-27 10:38:35 C 13 58 12.56 +04 11 58.0 V T08
2019-04-27 10:51:17 C 13 58 10.80 +04 12 05.1 V T08
2019-04-27 11:03:11 C 13 58 09.21 +04 12 11.4 V T08
2019-04-27 11:16:02 C 13 58 07.45 +04 12 19.5 V T08
2019-04-27 22:49:42 C 13 56 41.99 +04 18 35.8 V C95
2019-04-27 22:51:54 C 13 56 41.66 +04 18 38.2 V C95
2019-04-27 22:54:18 C 13 56 41.41 +04 18 39.0 V C95
2019-04-27 22:56:34 C 13 56 41.06 +04 18 40.4 V C95
2019-04-27 22:58:52 C 13 56 40.77 +04 18 41.8 V C95
2019-04-27 23:01:06 C 13 56 40.48 +04 18 43.6 V C95
2019-04-29 07:37:55 C 13 52 47.08 +04 35 40.2 V 703
2019-04-29 08:00:36 C 13 52 44.34 +04 35 51.3 V 703
2019-05-01 10:33:06 C 13 47 14.07 +04 57 45.9 V T08
2019-05-01 10:45:49 C 13 47 12.67 +04 57 50.9 V T08
2019-05-01 10:59:18 C 13 47 11.13 +04 57 56.1 V T08
2019-05-01 11:11:57 C 13 47 09.72 +04 58 00.0 V T08
2019-05-01 14:57:46 C 13 46 47.72 +04 59 18.7 q D29
2019-05-01 15:18:08 C 13 46 45.50 +04 59 26.4 q D29
2019-05-01 15:38:30 C 13 46 43.24 +04 59 33.9 q D29
2019-05-02 15:40:11 C 13 44 20.49 +05 07 59.2 q D29
2019-05-02 16:01:50 C 13 44 18.23 +05 08 06.4 q D29
2019-05-02 16:23:27 C 13 44 15.99 +05 08 13.1 q D29
2019-05-04 07:13:01 C 13 40 42.42 +05 19 40.5 V 703
2019-05-04 07:35:37 C 13 40 40.41 +05 19 42.0 V 703
2019-05-10 07:59:37 C 13 30 13.55 +05 41 30.4 V T05
2019-05-10 08:14:56 C 13 30 12.54 +05 41 31.2 V T05
2019-05-10 08:38:39 C 13 30 10.98 +05 41 32.2 V T05
2019-05-10 10:29:16 C 13 30 03.81 +05 41 38.7 V T05
2019-06-04 05:36:47 C 13 20 03.91 +03 43 51.8 V G96
2019-06-04 05:44:52 C 13 20 03.99 +03 43 48.9 V G96
2019-06-04 05:52:57 C 13 20 04.14 +03 43 45.7 V G96
2020-03-30 21:36:36 C 07 44 01.15 +27 40 15.5 V Z80
2020-03-30 21:40:21 C 07 44 04.36 +27 40 14.8 V Z80
2020-03-30 21:44:06 C 07 44 07.49 +27 40 14.1 V Z80
2020-03-30 21:47:54 C 07 44 10.77 +27 40 12.7 V Z80
2020-03-31 23:30:19 C 08 05 34.48 +27 29 07.1 V Z80
2020-03-31 23:37:10 C 08 05 39.88 +27 29 02.9 V Z80
2020-04-06 20:39:29 C 09 29 33.07 +24 43 29.5 V 130
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)