5645 (1990 SP)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3873146300 ± 1.01e-08
Semi-major axis (a)1.3545419449 AU ± 5.68e-10
Inclination (i)13.50517209° ± 2.14e-06
Long. of Asc. Node (Ω)45.70240895° ± 6.76e-06
Arg. of Perihelion (ω)48.28455414° ± 7.07e-06
Mean Anomaly (M)54.54806058° ± 1.90e-06
Mean Motion (n)0.6252066507°/day ± 3.94e-10
Perihelion dist (q)0.82990803 AU ± 1.37e-08
Aphelion dist (Q)1.87917586 AU ± 1.37e-08
Orbital Period1.57648080 yr ± 9.92e-10
Physical Parameters
H (abs. magnitude)17.23
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.239″
Uncertainty0
Orbit TypeApollo
MOID0.054890 AU
Observations Used1586
Radar Obs Used1
Gaia Obs Used22
Oppositions15
Arc Total1974-2024
First Observation Used1974-08-13
Last Observation Used2024-09-26
Observations (1904)
Date Type RA Dec Mag Band Observatory
2024-04-01 07:59:35 C 07 47 35.429 +55 45 11.38 V T08
2024-04-01 08:03:47 C 07 47 37.226 +55 45 01.80 V T08
2024-04-01 08:35:37 C 07 47 51.053 +55 43 48.58 V T08
2024-04-01 20:52:28 C 07 53 13.70 +55 15 40.2 M32
2024-04-01 20:59:35 C 07 53 16.66 +55 15 23.3 M32
2024-04-01 21:02:47 C 07 53 18.14 +55 15 16.1 M32
2024-04-01 21:06:44 C 07 53 19.77 +55 15 06.7 M32
2024-04-01 21:12:15 C 07 53 22.19 +55 14 53.2 M32
2024-04-01 21:17:00 C 07 53 24.17 +55 14 42.5 M32
2024-04-01 21:20:09 C 07 53 25.40 +55 14 34.9 M32
2024-04-01 21:23:18 C 07 53 26.73 +55 14 26.5 M32
2024-04-02 19:09:34 B 08 02 36.55 +54 23 17.9 V 130
2024-04-02 19:11:05 B 08 02 37.16 +54 23 14.2 V 130
2024-04-02 19:12:36 B 08 02 37.75 +54 23 10.5 V 130
2024-04-02 19:14:07 B 08 02 38.38 +54 23 06.7 V 130
2024-04-06 07:37:25 C 08 34 00.533 +50 48 58.43 V T08
2024-04-06 07:57:54 C 08 34 07.234 +50 48 03.53 V T08
2024-04-06 08:18:21 C 08 34 13.901 +50 47 08.70 V T08
2024-04-07 20:16:55 B 08 45 49.77 +49 10 34.0 X L99
2024-04-07 20:21:45 B 08 45 51.28 +49 10 19.9 X L99
2024-04-07 20:26:35 B 08 45 52.75 +49 10 07.0 X L99
2024-04-08 05:06:49 C 08 48 31.878 +48 46 46.02 V 703
2024-04-08 05:10:07 C 08 48 32.807 +48 46 36.91 V 703
2024-04-08 05:13:25 C 08 48 33.764 +48 46 27.91 V 703
2024-04-08 05:16:44 C 08 48 34.780 +48 46 18.80 V 703
2024-04-10 19:41:58 B 09 06 12.54 +45 55 23.7 X L99
2024-04-10 19:45:01 B 09 06 13.25 +45 55 14.9 X L99
2024-04-10 19:48:04 B 09 06 14.07 +45 55 06.2 X L99
2024-04-10 19:51:07 B 09 06 14.91 +45 54 57.8 X L99
2024-04-10 19:54:10 B 09 06 15.61 +45 54 48.6 X L99
2024-04-10 22:04:45 B 09 06 49.54 +45 48 49.6 X M59
2024-04-10 22:10:48 B 09 06 51.00 +45 48 34.2 X M59
2024-04-10 22:16:52 B 09 06 52.73 +45 48 17.2 X M59
2024-04-11 05:11:20 C 09 08 40.679 +45 29 22.92 V 703
2024-04-11 05:17:57 C 09 08 42.241 +45 29 06.79 V 703
2024-04-11 05:21:15 C 09 08 43.084 +45 28 57.58 V 703
2024-04-11 19:18:52 C 09 12 16.46 +44 50 30.0 M32
2024-04-11 19:27:46 C 09 12 18.63 +44 50 05.4 M32
2024-04-11 19:36:40 C 09 12 20.79 +44 49 40.9 M32
2024-04-11 19:45:33 C 09 12 22.96 +44 49 16.3 M32
2024-04-11 19:54:27 C 09 12 25.12 +44 48 51.7 M32
2024-04-11 21:39:44 B 09 12 50.74 +44 43 59.3 X L99
2024-04-11 21:42:50 B 09 12 51.44 +44 43 50.6 X L99
2024-04-11 21:45:56 B 09 12 52.19 +44 43 40.9 X L99
2024-04-11 21:49:02 B 09 12 52.95 +44 43 32.8 X L99
2024-04-11 21:52:08 B 09 12 53.70 +44 43 23.7 X L99
2024-04-13 05:10:29 C 09 20 26.185 +43 17 47.58 V 703
2024-04-13 05:13:47 C 09 20 26.938 +43 17 38.58 V 703
2024-04-13 05:17:06 C 09 20 27.690 +43 17 29.36 V 703
2024-04-13 05:20:24 C 09 20 28.432 +43 17 19.75 V 703
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2020-10-15 15:20:00 87074.9 0.4 Hz 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m)