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
2021-02-25 08:37:51 S 16 32 12.53 -09 07 55.1 L C51
2021-02-25 11:46:09 S 16 32 21.144 -09 09 22.21 L C51
2021-02-25 14:54:29 S 16 32 29.66 -09 10 48.1 L C51
2021-02-25 18:02:48 S 16 32 38.15 -09 12 15.3 L C51
2021-02-25 19:36:52 S 16 32 42.40 -09 12 58.5 L C51
2021-02-25 21:11:07 S 16 32 46.63 -09 13 41.4 L C51
2021-02-25 22:45:11 S 16 32 50.83 -09 14 24.7 L C51
2021-02-26 00:19:26 S 16 32 55.05 -09 15 07.8 L C51
2021-02-26 01:53:30 S 16 32 59.24 -09 15 51.2 L C51
2021-02-26 03:27:34 S 16 33 03.43 -09 16 34.4 L C51
2021-02-26 05:01:49 S 16 33 07.59 -09 17 17.2 L C51
2021-02-26 08:10:08 S 16 33 15.99 -09 18 44.3 L C51
2021-02-26 11:18:16 S 16 33 24.259 -09 20 10.10 L C51
2021-02-26 14:26:35 S 16 33 32.49 -09 21 35.9 L C51
2021-02-26 17:34:54 S 16 33 40.69 -09 23 02.0 L C51
2021-02-27 14:28:29 C 16 34 35.16 -09 32 40.0 V T08
2021-02-27 14:33:47 C 16 34 35.36 -09 32 43.7 V T08
2021-02-27 14:42:34 C 16 34 35.72 -09 32 47.5 V T08
2021-02-27 14:57:10 C 16 34 36.26 -09 32 53.4 V T08
2021-03-03 13:19:53 C 16 38 16.67 -10 15 32.6 V T08
2021-03-03 13:25:11 C 16 38 16.85 -10 15 35.8 V T08
2021-03-03 13:39:08 C 16 38 17.32 -10 15 42.6 V T08
2021-03-03 13:53:44 C 16 38 17.76 -10 15 48.7 V T08
2021-03-06 01:19:25 S 16 40 15.463 -10 42 18.50 L C51
2021-03-06 01:19:36 S 16 40 15.463 -10 42 17.93 L C51
2021-03-07 14:06:54 C 16 41 21.45 -10 58 49.6 V T08
2021-03-07 14:12:17 C 16 41 21.54 -10 58 51.5 V T08
2021-03-07 14:20:55 C 16 41 21.81 -10 58 56.1 V T08
2021-03-07 14:39:42 C 16 41 22.24 -10 59 03.9 V T08
2021-03-15 13:45:51 C 16 45 09.00 -12 24 09.4 V T08
2021-03-15 13:50:31 C 16 45 08.98 -12 24 11.3 V T08
2021-03-15 14:01:37 C 16 45 09.12 -12 24 16.6 V T08
2021-03-15 14:28:52 C 16 45 09.31 -12 24 28.8 V T08
2021-03-19 13:30:30 C 16 45 45.07 -13 07 11.4 V T08
2021-03-19 13:33:49 C 16 45 45.08 -13 07 13.3 V T08
2021-03-19 13:41:51 C 16 45 45.05 -13 07 17.2 V T08
2021-03-19 14:02:55 C 16 45 44.97 -13 07 26.2 V T08
2021-03-19 14:40:10 C 16 45 44.95 -13 07 44.4 V T08
2021-03-19 14:52:49 C 16 45 44.90 -13 07 48.7 V T08
2021-03-19 15:23:00 C 16 45 44.78 -13 08 03.3 V T08
2021-03-20 14:23:55 C 16 45 45.067 -13 18 28.79 U F51
2021-03-20 14:41:20 C 16 45 44.981 -13 18 36.74 U F51
2021-03-20 14:58:43 C 16 45 44.897 -13 18 44.64 U F51
2021-03-20 15:16:08 C 16 45 44.807 -13 18 52.58 U F51
2021-03-22 11:20:01 C 16 45 35.88 -13 38 56.5 V T08
2021-03-22 11:41:19 C 16 45 35.73 -13 39 05.7 V T08
2021-03-22 11:59:49 C 16 45 35.56 -13 39 14.6 V T08
2021-03-22 12:07:48 C 16 45 35.48 -13 39 18.6 V T08
2021-03-26 13:58:03 C 16 44 27.05 -14 24 29.3 V T08
2021-03-26 14:00:42 C 16 44 27.02 -14 24 29.7 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)