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
2024-03-09 19:01:05 C 02 53 11.27 +55 30 29.6 X L18
2024-03-09 19:03:16 C 02 53 12.19 +55 30 34.1 X L18
2024-03-09 19:05:27 C 02 53 13.08 +55 30 37.9 X L18
2024-03-09 19:07:38 C 02 53 13.93 +55 30 43.4 X L18
2024-03-10 20:55:15 B 03 04 03.72 +56 24 36.6 X L99
2024-03-10 21:01:54 B 03 04 06.59 +56 24 50.2 X L99
2024-03-10 21:08:04 B 03 04 09.23 +56 25 02.3 X L99
2024-03-18 05:43:06 C 04 35 30.283 +60 45 43.49 V T05
2024-03-18 05:48:27 C 04 35 33.418 +60 45 47.48 V T05
2024-03-18 05:52:28 C 04 35 35.858 +60 45 49.90 V T05
2024-03-18 05:57:55 C 04 35 38.856 +60 45 53.86 V T05
2024-03-18 06:03:11 C 04 35 42.038 +60 45 56.84 V T05
2024-03-20 06:58:10 C 05 05 18.283 +61 11 22.78 V T08
2024-03-20 07:20:49 C 05 05 32.018 +61 11 27.46 V T08
2024-03-20 07:29:55 C 05 05 37.649 +61 11 28.32 V T08
2024-03-20 20:43:59 B 05 13 48.18 +61 13 50.1 X L76
2024-03-20 20:49:05 B 05 13 51.29 +61 13 51.0 X L76
2024-03-20 20:54:08 B 05 13 54.37 +61 13 50.7 X L76
2024-03-22 06:06:58 C 05 34 31.039 +61 12 38.56 V T05
2024-03-22 06:12:26 C 05 34 34.402 +61 12 36.72 V T05
2024-03-22 06:19:52 C 05 34 38.902 +61 12 34.49 V T05
2024-03-22 06:39:31 C 05 34 50.854 +61 12 29.52 V T05
2024-03-26 19:05:49 B 06 40 02.92 +59 47 07.9 X L99
2024-03-26 19:10:09 B 06 40 05.32 +59 47 02.2 X L99
2024-03-26 19:14:29 B 06 40 07.75 +59 46 56.7 X L99
2024-03-27 20:21:16 B 06 54 09.05 +59 11 09.9 X L99
2024-03-27 20:25:35 B 06 54 11.48 +59 11 02.4 X L99
2024-03-27 20:29:55 B 06 54 13.81 +59 10 56.5 X L99
2024-03-28 03:04:04 C 06 57 49.536 +59 00 56.41 V G96
2024-03-28 03:12:22 C 06 57 53.939 +59 00 43.09 V G96
2024-03-28 03:20:42 C 06 57 58.367 +59 00 29.66 V G96
2024-03-28 03:29:02 C 06 58 02.773 +59 00 16.20 V G96
2024-03-28 08:05:47 C 07 00 30.840 +58 52 51.38 V T08
2024-03-28 08:09:59 C 07 00 33.084 +58 52 44.18 V T08
2024-03-28 08:24:54 C 07 00 40.958 +58 52 19.31 V T08
2024-03-28 08:32:41 C 07 00 44.995 +58 52 05.92 V T08
2024-03-29 21:51:12 C 07 20 07.64 +57 45 54.7 X L18
2024-03-29 21:53:08 C 07 20 08.67 +57 45 51.0 X L18
2024-03-29 21:55:05 C 07 20 09.57 +57 45 47.1 X L18
2024-03-30 01:07:14 C 07 21 46.86 +57 39 54.9 V W46
2024-03-30 01:25:23 C 07 21 55.74 +57 39 19.3 V W46
2024-03-30 01:32:53 C 07 21 59.39 +57 39 04.5 V W46
2024-03-30 07:23:38 C 07 24 52.289 +57 27 45.83 V T05
2024-03-30 07:29:06 C 07 24 54.866 +57 27 34.81 V T05
2024-03-30 07:36:30 C 07 24 58.462 +57 27 19.98 V T05
2024-03-30 07:55:05 C 07 25 07.366 +57 26 42.29 V T05
2024-03-31 04:21:02 C 07 34 57.709 +56 45 09.04 V 703
2024-03-31 04:24:27 C 07 34 59.308 +56 45 02.16 V 703
2024-03-31 04:27:52 C 07 35 00.913 +56 44 54.60 V 703
2024-03-31 04:31:17 C 07 35 02.436 +56 44 47.44 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)