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
1974-08-13 10:07:53 18 12 04.54 -47 33 08.4 c 260
1974-08-13 10:47:53 18 12 02.59 -47 32 55.4 c 260
1990-08-18 17:49:25 A 01 13 42.19 -31 47 32.5 413
1990-08-18 18:28:20 A 01 13 43.48 -31 48 02.9 413
1990-09-10 17:13:05 A 01 23 26.04 -40 53 24.1 413
1990-09-20 15:56:08 A 01 15 53.95 -45 50 00.4 413
1990-09-21 18:53:53 A 01 14 18.37 -46 24 52.9 413
1990-09-22 17:47:55 A 01 12 50.90 -46 54 51.3 413
1990-09-24 15:03:36 A 01 09 35.29 -47 54 22.9 413
1990-10-10 12:47:59 A 00 11 31.36 -56 09 28.2 413
1990-10-11 12:21:33 A 00 05 16.63 -56 37 04.5 413
1990-10-16 13:08:04 A 23 25 16.53 -58 39 44.2 413
1990-10-17 10:20:59 A 23 16 44.12 -58 56 24.8 413
1991-01-19 10:30:06 A 15 48 10.36 +07 07 53.0 801
1991-01-19 10:44:50 A 15 48 11.08 +07 07 43.1 801
1991-02-11 09:27:59 A 16 14 44.58 +01 38 25.3 801
1991-02-11 09:44:47 A 16 14 45.17 +01 38 16.6 801
1991-03-13 09:05:05 A 16 27 17.00 -04 10 44.4 801
1991-03-13 09:27:50 A 16 27 16.64 -04 10 53.8 801
1991-03-16 08:39:40 A 16 25 58.67 -04 43 36.9 801
1991-03-16 08:57:16 A 16 25 58.20 -04 43 44.8 801
1991-03-21 08:22:22 A 16 22 23.88 -05 39 04.9 801
1991-03-21 08:37:48 A 16 22 23.07 -05 39 12.5 801
1991-04-10 17:52:49 A 15 47 59.33 -09 35 47.4 413
1991-04-12 07:46:09 A 15 44 03.50 -09 54 36.9 801
1991-04-12 08:03:40 A 15 44 01.56 -09 54 45.8 801
1991-04-14 07:34:52 A 15 38 53.28 -10 17 42.2 801
1991-04-14 07:47:02 A 15 38 51.89 -10 17 48.0 801
1991-04-19 08:47:19 A 15 24 57.03 -11 14 37.2 801
1991-04-19 08:50:22 A 15 24 56.63 -11 14 38.3 801
1991-04-20 17:09:19 A 15 21 05.29 -11 28 55.7 413
1991-05-12 04:59:32 A 14 22 48.60 -14 37 00.3 801
1991-05-12 05:06:18 A 14 22 47.97 -14 37 01.8 801
1993-06-30 16:29:32 C 21 30 14.01 -41 45 29.7 413
1993-06-30 16:33:46 C 21 30 13.86 -41 45 33.2 413
1993-07-01 14:54:30 C 21 29 27.73 -42 03 11.1 413
1993-07-01 14:57:29 C 21 29 27.65 -42 03 13.4 413
1993-07-01 16:21:10 C 21 29 24.35 -42 04 20.4 413
1993-07-01 16:25:01 C 21 29 24.18 -42 04 23.4 413
1993-07-30 13:34:21 C 20 34 19.57 -50 06 01.5 413
1993-07-31 14:37:25 C 20 31 27.31 -50 15 56.5 413
1993-07-31 14:42:19 C 20 31 26.70 -50 15 58.5 413
1993-08-10 14:28:01 A 20 03 53.39 -51 08 11.5 474
1993-08-10 15:04:52 A 20 03 49.29 -51 08 12.3 474
1993-08-15 14:58:28 A 19 51 05.65 -51 05 19.3 18.9 474
1993-08-15 15:39:42 A 19 51 01.67 -51 05 14.1 474
1993-08-24 14:00:14 C 19 32 20.72 -50 19 24.0 413
1993-08-24 14:05:29 C 19 32 20.36 -50 19 22.1 413
1993-08-24 14:10:35 C 19 32 19.98 -50 19 20.5 413
1993-08-25 15:53:28 C 19 30 30.96 -50 10 54.9 413
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)