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
2024-01-03 02:36:09 C 22 46 59.560 -04 06 55.33 V 703
2024-01-03 04:53:25 C 22 47 13.274 -04 03 03.06 V T05
2024-01-03 04:57:58 C 22 47 13.769 -04 02 55.28 V T05
2024-01-03 05:09:03 C 22 47 14.834 -04 02 35.95 V T05
2024-01-03 05:23:34 C 22 47 16.241 -04 02 11.80 V T05
2024-01-05 05:29:27 C 22 52 05.918 -02 40 10.96 V T08
2024-01-05 05:33:32 C 22 52 06.300 -02 40 03.72 V T08
2024-01-05 05:41:05 C 22 52 07.042 -02 39 50.33 V T08
2024-01-05 05:58:38 C 22 52 08.753 -02 39 20.12 V T08
2024-01-14 01:40:34 C 23 13 28.664 +03 42 29.20 V G96
2024-01-14 01:48:03 C 23 13 29.413 +03 42 43.34 V G96
2024-01-14 01:55:32 C 23 13 30.148 +03 42 57.35 V G96
2024-01-14 02:03:01 C 23 13 30.882 +03 43 11.50 V G96
2024-01-19 02:38:48 C 23 25 45.545 +07 36 08.82 V 703
2024-01-19 02:48:34 C 23 25 46.348 +07 36 25.63 V 703
2024-01-27 05:45:33 C 23 45 54.974 +14 16 47.35 V T05
2024-01-27 05:52:06 C 23 45 55.670 +14 17 01.25 V T05
2024-01-27 06:09:09 C 23 45 57.487 +14 17 36.82 V T05
2024-01-27 06:18:20 C 23 45 58.397 +14 17 56.80 V T05
2024-01-29 05:18:16 C 23 50 57.108 +15 58 51.42 V T05
2024-01-29 05:24:09 C 23 50 57.710 +15 59 03.55 V T05
2024-01-29 05:32:37 C 23 50 58.562 +15 59 21.80 V T05
2024-01-29 05:48:59 C 23 51 00.266 +15 59 57.37 V T05
2024-01-30 02:25:31 C 23 53 12.757 +16 44 43.51 V 703
2024-01-30 02:28:49 C 23 53 13.078 +16 44 50.32 V 703
2024-01-30 02:32:07 C 23 53 13.438 +16 44 56.11 V 703
2024-02-01 05:54:42 C 23 58 47.215 +18 38 04.27 V T05
2024-02-01 05:59:16 C 23 58 47.750 +18 38 14.82 V T05
2024-02-01 06:10:07 C 23 58 48.941 +18 38 38.26 V T05
2024-02-01 06:31:59 C 23 58 51.233 +18 39 26.89 V T05
2024-02-03 05:10:40 C 00 04 00.830 +20 23 58.06 V T08
2024-02-03 05:15:19 C 00 04 01.445 +20 24 08.50 V T08
2024-02-03 05:26:38 C 00 04 02.630 +20 24 33.59 V T08
2024-02-03 05:41:00 C 00 04 04.198 +20 25 05.77 V T08
2024-02-05 02:15:24 C 00 09 06.851 +22 06 29.81 V 703
2024-02-05 02:18:40 C 00 09 07.225 +22 06 38.45 V 703
2024-02-05 02:21:57 C 00 09 07.726 +22 06 45.18 V 703
2024-02-05 02:25:13 C 00 09 08.111 +22 06 51.66 V 703
2024-02-17 02:52:06 C 00 46 14.329 +33 40 57.07 V 703
2024-02-17 03:02:06 C 00 46 15.820 +33 41 21.12 V 703
2024-02-18 05:26:25 C 00 50 15.002 +34 48 03.17 V T05
2024-02-18 05:31:38 C 00 50 15.818 +34 48 16.42 V T05
2024-02-18 05:39:27 C 00 50 16.990 +34 48 35.60 V T05
2024-02-18 05:56:29 C 00 50 19.572 +34 49 17.98 V T05
2024-03-08 21:45:09 B 02 44 44.51 +54 43 43.9 X L99
2024-03-08 21:52:02 B 02 44 47.16 +54 43 58.5 X L99
2024-03-08 21:58:26 B 02 44 49.70 +54 44 13.1 X L99
2024-03-09 18:20:47 B 02 52 54.97 +55 29 03.7 X L99
2024-03-09 18:27:33 B 02 52 57.75 +55 29 18.4 X L99
2024-03-09 18:33:50 B 02 53 00.25 +55 29 29.9 X L99
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)