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
2021-03-26 14:04:41 C 16 44 26.94 -14 24 33.1 V T08
2021-03-26 14:12:39 C 16 44 26.72 -14 24 36.5 V T08
2021-04-13 14:27:07 C 16 25 14.334 -17 51 45.10 U F51
2021-04-13 14:36:41 C 16 25 13.600 -17 51 49.61 U F51
2021-04-13 14:46:14 C 16 25 12.869 -17 51 54.14 U F51
2021-04-13 14:55:49 C 16 25 12.134 -17 51 58.64 U F51
2021-04-17 12:22:01 C 16 17 52.34 -18 36 12.1 V T05
2021-04-17 12:29:59 C 16 17 51.63 -18 36 15.9 V T05
2021-04-17 12:32:38 C 16 17 51.40 -18 36 17.2 V T05
2021-04-17 12:39:54 C 16 17 50.76 -18 36 20.5 V T05
2021-04-18 13:37:48 C 16 15 42.099 -18 47 54.71 U F51
2021-04-18 13:54:09 C 16 15 40.603 -18 48 02.15 U F51
2021-04-18 14:10:31 C 16 15 39.109 -18 48 09.60 U F51
2021-04-19 10:35:43 C 16 13 51.73 -18 57 30.6 V T08
2021-04-19 10:41:42 C 16 13 51.16 -18 57 33.5 V T08
2021-04-19 10:50:59 C 16 13 50.31 -18 57 37.8 V T08
2021-04-19 11:02:15 C 16 13 49.25 -18 57 43.3 V T08
2021-04-20 10:21:22 C 16 11 41.63 -19 08 20.1 V G96
2021-04-20 10:29:06 C 16 11 40.89 -19 08 23.5 V G96
2021-04-20 10:36:48 C 16 11 40.15 -19 08 27.0 V G96
2021-04-20 10:44:29 C 16 11 39.40 -19 08 30.0 V G96
2021-04-22 13:27:49 C 16 06 51.328 -19 30 56.50 U F51
2021-04-22 13:44:39 C 16 06 49.621 -19 31 03.73 U F51
2021-04-22 14:01:25 C 16 06 47.926 -19 31 10.89 U F51
2021-04-22 14:18:09 C 16 06 46.229 -19 31 18.05 U F51
2021-04-23 10:15:10 C 16 04 49.74 -19 39 54.9 V T08
2021-04-23 10:22:32 C 16 04 48.93 -19 39 58.1 V T08
2021-04-23 10:26:54 C 16 04 48.56 -19 40 00.1 V T08
2021-04-23 11:02:19 C 16 04 44.86 -19 40 15.1 V T08
2021-04-24 10:58:44 C 16 02 20.94 -19 50 24.5 V T08
2021-04-24 11:01:23 C 16 02 20.69 -19 50 26.5 V T08
2021-04-24 11:05:21 C 16 02 20.25 -19 50 27.8 V T08
2021-04-24 11:12:39 C 16 02 19.44 -19 50 30.5 V T08
2021-05-01 12:35:21 C 15 44 11.47 -20 55 27.4 V T08
2021-05-01 12:40:00 C 15 44 10.96 -20 55 28.5 V T08
2021-05-01 13:05:14 C 15 44 08.02 -20 55 37.1 V T08
2021-05-01 13:35:28 C 15 44 04.99 -20 55 33.5 q E89
2021-05-01 13:47:59 C 15 44 03.61 -20 55 38.1 q E89
2021-05-01 14:15:00 C 15 44 00.48 -20 55 46.2 q E89
2021-05-03 12:03:11 C 15 38 52.38 -21 11 07.4 V T05
2021-05-03 12:07:49 C 15 38 51.84 -21 11 08.8 V T05
2021-05-03 12:17:03 C 15 38 50.76 -21 11 11.9 V T05
2021-05-04 09:46:12 C 15 36 25.28 -21 17 54.5 V 703
2021-05-04 09:53:11 C 15 36 24.42 -21 17 57.3 V 703
2021-05-04 10:00:10 C 15 36 23.60 -21 17 59.5 V 703
2021-05-04 10:07:09 C 15 36 22.68 -21 18 02.5 V 703
2021-05-05 03:04:24 C 15 34 27.97 -21 23 06.6 o Z22
2021-05-05 03:25:48 C 15 34 25.47 -21 23 12.2 o Z22
2021-05-09 09:32:50 C 15 22 55.63 -21 50 23.1 V T08
2021-05-09 09:35:30 C 15 22 55.32 -21 50 23.8 V T08
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)