IAA RAS IAA Minor Planet Database

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
2020-09-15 10:22:49 C 03 46 34.64 -20 14 00.4 – V 703
2020-09-15 13:22:07 C 03 47 06.25 -20 13 50.4 – V T08
2020-09-15 13:24:46 C 03 47 06.69 -20 13 50.3 – V T08
2020-09-15 13:50:52 C 03 47 11.08 -20 13 49.5 – V T08
2020-09-17 13:37:04 C 03 55 53.03 -20 11 03.4 – V T05
2020-09-17 13:39:42 C 03 55 53.50 -20 11 03.4 – V T05
2020-09-17 13:44:58 C 03 55 54.45 -20 11 02.9 – V T05
2020-09-17 13:52:52 C 03 55 55.86 -20 11 02.2 – V T05
2020-09-18 10:26:44 C 03 59 51.54 -20 09 05.9 – V 703
2020-09-18 10:34:34 C 03 59 53.03 -20 09 05.4 – V 703
2020-09-18 10:42:23 C 03 59 54.48 -20 09 04.9 – V 703
2020-09-18 10:50:13 C 03 59 55.93 -20 09 03.7 – V 703
2020-09-19 11:56:56 C 04 04 54.45 -20 05 44.7 – V T08
2020-09-19 12:03:02 C 04 04 55.64 -20 05 43.9 – V T08
2020-09-19 12:12:21 C 04 04 57.42 -20 05 42.7 – V T08
2020-09-19 12:27:40 C 04 05 00.39 -20 05 40.8 – V T08
2020-09-19 13:23:07 C 04 05 11.06 -20 05 33.6 – V T08
2020-09-19 13:29:08 C 04 05 12.24 -20 05 33.0 – V T08
2020-09-19 13:35:48 C 04 05 13.52 -20 05 32.1 – V T08
2020-09-19 13:43:47 C 04 05 15.05 -20 05 31.1 – V T08
2020-09-21 12:22:13 C 04 15 00.91 -19 56 53.0 – V T05
2020-09-21 12:27:35 C 04 15 02.02 -19 56 52.0 – V T05
2020-09-21 12:34:58 C 04 15 03.56 -19 56 50.5 – V T05
2020-09-21 12:50:11 C 04 15 06.74 -19 56 47.4 – V T05
2020-09-23 12:48:23 C 04 25 56.38 -19 43 46.6 – V T08
2020-09-23 12:53:02 C 04 25 57.43 -19 43 45.2 – V T08
2020-09-23 13:07:41 C 04 26 00.74 -19 43 40.9 – V T08
2020-09-23 13:16:59 C 04 26 02.82 -19 43 38.0 – V T08
2020-09-24 02:00:41 C 04 29 03.47 -19 39 32.7 – V 089
2020-09-24 02:04:14 C 04 29 04.30 -19 39 31.9 – V 089
2020-09-24 02:07:48 C 04 29 05.13 -19 39 30.1 – V 089
2020-09-24 10:24:56 C 04 31 06.10 -19 36 25.7 – V 703
2020-09-24 10:31:56 C 04 31 07.76 -19 36 23.1 – V 703
2020-09-24 10:38:55 C 04 31 09.38 -19 36 20.8 – V 703
2020-09-24 10:45:54 C 04 31 11.03 -19 36 17.9 – V 703
2020-09-25 13:42:21 C 04 37 54.75 -19 25 18.5 – V T05
2020-09-25 13:46:20 C 04 37 55.71 -19 25 16.8 – V T05
2020-09-25 13:53:05 C 04 37 57.37 -19 25 13.9 – V T05
2020-09-25 14:07:23 C 04 38 00.88 -19 25 07.6 – V T05
2020-09-27 10:09:17 C 04 49 44.85 -19 03 00.3 – V 703
2020-09-27 10:16:31 C 04 49 46.82 -19 02 56.7 – V 703
2020-09-27 10:23:45 C 04 49 48.74 -19 02 52.5 – V 703
2020-09-27 10:31:00 C 04 49 50.63 -19 02 48.8 – V 703
2020-09-27 12:44:33 C 04 50 28.37 -19 01 24.2 – V T08
2020-09-27 12:47:12 C 04 50 29.08 -19 01 22.8 – V T08
2020-09-27 12:53:10 C 04 50 30.69 -19 01 19.4 – V T08
2020-09-27 13:00:33 C 04 50 32.66 -19 01 15.2 – V T08
2020-09-28 01:48:13 C 04 54 08.10 -18 53 47.4 – V 089
2020-09-28 01:51:36 C 04 54 09.02 -18 53 44.9 – V 089
2020-09-28 01:54:59 C 04 54 09.99 -18 53 42.5 – V 089
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)