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
2019-03-27 14:21:09 C 16 35 08.37 -13 34 49.5 V T05
2019-03-30 13:43:42 C 16 16 25.70 -11 15 49.4 V T08
2019-03-30 13:58:00 C 16 16 21.70 -11 15 21.6 V T08
2019-03-30 14:11:29 C 16 16 18.00 -11 14 54.9 V T08
2019-03-30 14:24:34 C 16 16 14.37 -11 14 29.0 V T08
2019-04-03 13:21:02 C 15 51 42.19 -08 10 28.3 V T08
2019-04-03 13:23:36 C 15 51 41.532 -08 10 24.38 U F51
2019-04-03 13:34:51 C 15 51 38.44 -08 10 02.0 V T08
2019-04-03 13:41:50 C 15 51 36.580 -08 09 49.57 U F51
2019-04-03 13:48:09 C 15 51 34.82 -08 09 36.2 V T08
2019-04-03 14:00:03 C 15 51 31.637 -08 09 14.77 U F51
2019-04-03 14:02:38 C 15 51 30.88 -08 09 08.6 V T08
2019-04-03 14:18:15 C 15 51 26.697 -08 08 39.97 U F51
2019-04-04 12:50:34 C 15 45 44.891 -07 25 56.67 U F51
2019-04-04 13:08:28 C 15 45 40.082 -07 25 23.03 U F51
2019-04-04 13:26:21 C 15 45 35.271 -07 24 49.36 U F51
2019-04-05 13:05:27 C 15 39 39.18 -06 40 39.1 V T05
2019-04-05 13:18:35 C 15 39 35.70 -06 40 14.8 V T05
2019-04-05 13:31:38 C 15 39 32.23 -06 39 50.7 V T05
2019-04-05 13:45:25 C 15 39 28.58 -06 39 25.0 V T05
2019-04-07 11:33:21 C 15 28 10.81 -05 16 25.5 V G96
2019-04-07 11:40:47 C 15 28 08.91 -05 16 12.1 V G96
2019-04-07 11:48:12 C 15 28 07.01 -05 15 58.6 V G96
2019-04-07 11:55:39 C 15 28 05.12 -05 15 45.6 V G96
2019-04-07 12:33:24 C 15 27 57.89 -05 14 28.7 V T08
2019-04-07 12:46:08 C 15 27 54.60 -05 14 05.6 V T08
2019-04-07 13:00:02 C 15 27 51.00 -05 13 41.2 V T08
2019-04-07 13:13:57 C 15 27 47.41 -05 13 16.3 V T08
2019-04-09 12:36:56 C 15 16 29.52 -03 51 25.4 V T05
2019-04-09 12:50:13 C 15 16 26.20 -03 51 03.1 V T05
2019-04-09 13:03:27 C 15 16 22.92 -03 50 40.5 V T05
2019-04-09 13:16:45 C 15 16 19.60 -03 50 18.6 V T05
2019-04-11 12:15:47 C 15 05 33.54 -02 33 59.7 V T08
2019-04-11 12:28:26 C 15 05 30.58 -02 33 40.8 V T08
2019-04-11 12:42:36 C 15 05 27.12 -02 33 17.9 V T08
2019-04-11 12:55:40 C 15 05 24.02 -02 32 57.2 V T08
2019-04-12 08:21:42 C 15 01 05.94 -02 03 09.8 V H06
2019-04-12 08:24:17 C 15 01 05.33 -02 03 06.0 V H06
2019-04-12 08:26:53 C 15 01 04.73 -02 03 02.0 V H06
2019-04-14 01:52:20 C 14 52 10.05 -01 02 22.4 17.8 q J43
2019-04-14 02:04:39 C 14 52 07.27 -01 02 04.7 18.2 q J43
2019-04-14 02:16:55 C 14 52 04.55 -01 01 47.2 17.5 q J43
2019-04-14 02:29:12 C 14 52 01.81 -01 01 30.1 17.8 q J43
2019-04-15 11:50:02 C 14 45 10.23 -00 15 55.2 V T08
2019-04-15 12:02:40 C 14 45 07.54 -00 15 38.8 V T08
2019-04-15 12:14:32 C 14 45 04.98 -00 15 22.9 V T08
2019-04-15 12:27:08 C 14 45 02.28 -00 15 06.0 V T08
2019-04-16 05:22:50 C 14 41 41.62 +00 06 31.3 u H21
2019-04-16 05:28:19 C 14 41 40.48 +00 06 38.5 u H21
2019-04-16 05:34:06 C 14 41 39.28 +00 06 45.8 u H21
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)