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
2021-05-09 09:42:15 C 15 22 54.53 -21 50 25.4 V T08
2021-05-09 10:22:48 C 15 22 49.83 -21 50 35.3 V T08
2021-05-12 10:45:14 C 15 14 50.947 -22 06 18.80 U F51
2021-05-12 11:00:16 C 15 14 49.252 -22 06 21.71 U F51
2021-05-12 11:30:25 C 15 14 45.857 -22 06 27.48 U F51
2021-05-14 07:52:05 C 15 10 00.74 -22 14 44.6 V G96
2021-05-14 07:59:55 C 15 09 59.89 -22 14 46.1 V G96
2021-05-14 08:07:44 C 15 09 59.04 -22 14 47.7 V G96
2021-05-14 08:15:34 C 15 09 58.18 -22 14 48.8 V G96
2021-05-15 11:29:30 C 15 07 06.93 -22 19 21.6 V T05
2021-05-15 11:45:19 C 15 07 05.23 -22 19 24.1 V T05
2021-05-15 11:51:18 C 15 07 04.57 -22 19 24.6 V T05
2021-05-15 11:59:18 C 15 07 03.73 -22 19 25.8 V T05
2021-05-16 10:45:29 C 15 04 43.500 -22 22 59.47 U F51
2021-05-16 11:01:18 C 15 04 41.818 -22 23 01.79 U F51
2021-05-16 11:17:07 C 15 04 40.142 -22 23 04.11 U F51
2021-05-16 11:32:54 C 15 04 38.476 -22 23 06.29 U F51
2021-05-17 00:23:05 C 15 03 20.32 -22 24 47.7 o K95
2021-05-17 00:29:45 C 15 03 19.64 -22 24 48.8 o K95
2021-05-17 09:10:21 C 15 02 28.01 -22 26 15.7 V T08
2021-05-17 09:13:40 C 15 02 27.67 -22 26 15.9 V T08
2021-05-17 09:18:19 C 15 02 27.19 -22 26 16.9 V T08
2021-05-18 04:24:21 C 15 00 33.21 -22 28 41.8 o W92
2021-05-18 04:31:07 C 15 00 32.58 -22 28 42.8 o W92
2021-05-18 12:48:46 C 14 59 44.614 -22 29 49.81 V P07
2021-05-18 13:51:38 C 14 59 38.258 -22 29 58.52 V P07
2021-05-18 15:06:45 C 14 59 30.641 -22 30 08.86 V P07
2021-05-18 15:09:07 C 14 59 30.415 -22 30 09.32 V P07
2021-05-18 16:02:30 C 14 59 25.006 -22 30 15.95 V P07
2021-05-18 16:05:51 C 14 59 24.682 -22 30 16.31 V P07
2021-05-18 17:27:05 C 14 59 16.476 -22 30 26.57 V P07
2021-05-18 18:35:46 C 14 59 09.576 -22 30 34.13 V P07
2021-05-18 19:55:39 C 14 59 02.85 -22 30 43.4 o K95
2021-05-18 20:02:18 C 14 59 02.19 -22 30 44.2 o K95
2021-05-21 11:36:07 C 14 53 03.55 -22 38 13.3 V T08
2021-05-21 11:41:27 C 14 53 03.04 -22 38 13.7 V T08
2021-05-21 11:51:24 C 14 53 02.13 -22 38 15.1 V T08
2021-05-21 12:12:04 C 14 53 00.19 -22 38 16.8 V T08
2021-05-22 17:14:02 S 14 51 14.868 -22 41 13.85 V C57
2021-05-22 17:14:02 s 1 -155232.54 5 +301430.30 620.0 C57
2021-05-22 17:34:02 S 14 51 13.087 -22 41 15.94 V C57
2021-05-22 17:34:02 s 1 -155733.32 4 +300558.12 1020.0 C57
2021-05-22 17:54:02 S 14 51 11.270 -22 41 22.56 V C57
2021-05-22 17:54:02 s 1 -156234.57 6 +299676.73 1090.0 C57
2021-05-22 18:04:02 S 14 51 10.594 -22 41 24.68 V C57
2021-05-22 18:04:02 s 1 -156482.05 1 +299238.42 3950.0 C57
2021-05-22 18:24:02 S 14 51 08.758 -22 41 24.90 V C57
2021-05-22 18:24:02 s 1 -156981.16 2 +298348.03 7460.0 C57
2021-05-22 18:44:02 S 14 51 07.222 -22 41 26.23 V C57
2021-05-22 18:44:02 s 1 -157474.19 8 +297459.91 6770.0 C57
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)