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
2020-09-28 02:01:45 C 04 54 11.84 -18 53 38.6 – V 089
2020-09-28 02:05:08 C 04 54 12.79 -18 53 36.3 – V 089
2020-09-28 02:08:31 C 04 54 13.69 -18 53 34.2 – V 089
2020-09-28 13:26:11 C 04 57 30.07 -18 46 05.0 – V T08
2020-09-28 13:28:50 C 04 57 30.82 -18 46 03.3 – V T08
2020-09-28 13:34:50 C 04 57 32.50 -18 45 59.4 – V T08
2020-09-28 13:44:08 C 04 57 35.11 -18 45 53.4 – V T08
2020-09-29 12:41:04 C 05 04 26.25 -18 29 38.5 – V T05
2020-09-29 12:41:44 C 05 04 26.45 -18 29 38.1 – V T05
2020-09-29 12:43:42 C 05 04 27.02 -18 29 36.6 – V T05
2020-09-29 12:45:01 C 05 04 27.42 -18 29 35.7 – V T05
2020-09-29 12:48:59 C 05 04 28.58 -18 29 32.7 – V T05
2020-09-29 12:49:39 C 05 04 28.77 -18 29 32.5 – V T05
2020-09-29 12:56:15 C 05 04 30.74 -18 29 27.4 – V T05
2020-09-29 13:04:11 C 05 04 33.06 -18 29 21.8 – V T05
2020-10-01 13:06:28 C 05 19 52.81 -17 48 23.7 – V T08
2020-10-01 13:09:07 C 05 19 53.65 -17 48 21.1 – V T08
2020-10-01 13:13:47 C 05 19 55.17 -17 48 16.8 – V T08
2020-10-01 13:21:04 C 05 19 57.52 -17 48 09.9 – V T08
2020-10-03 13:42:33 C 05 36 52.558 -16 55 58.53 – U F52
2020-10-03 13:59:12 C 05 36 58.445 -16 55 38.67 – U F52
2020-10-03 14:04:09 C 05 37 00.20 -16 55 32.8 – V T05
2020-10-03 14:06:49 C 05 37 01.13 -16 55 29.7 – V T05
2020-10-03 14:12:05 C 05 37 03.00 -16 55 23.4 – V T05
2020-10-03 14:15:52 C 05 37 04.332 -16 55 18.99 – U F52
2020-10-03 14:28:35 C 05 37 08.82 -16 55 03.8 – V T05
2020-10-03 14:32:34 C 05 37 10.224 -16 54 58.94 – U F52
2020-10-04 14:23:19 C 05 46 06.92 -16 24 30.7 – V T05
2020-10-04 14:38:24 C 05 46 12.49 -16 24 10.6 – V T05
2020-10-04 15:02:08 C 05 46 21.28 -16 23 38.7 – V T05
2020-10-04 15:29:51 C 05 46 31.51 -16 23 01.2 – V T05
2020-10-06 11:01:47 C 06 03 56.79 -15 18 24.0 – V 703
2020-10-06 11:10:11 C 06 04 00.15 -15 18 10.9 – V 703
2020-10-06 11:18:34 C 06 04 03.54 -15 17 57.3 – V 703
2020-10-06 11:26:58 C 06 04 06.95 -15 17 43.8 – V 703
2020-10-06 14:18:39 C 06 05 18.70 -15 12 53.7 – V T08
2020-10-06 14:40:35 C 06 05 27.54 -15 12 18.0 – V T08
2020-10-06 14:44:38 C 06 05 29.18 -15 12 11.3 – V T08
2020-10-06 14:48:37 C 06 05 30.78 -15 12 04.7 – V T08
2020-10-06 15:20:33 C 06 05 43.68 -15 11 12.1 – V T08
2020-10-07 14:25:53 C 06 15 36.03 -14 31 12.8 – V T05
2020-10-07 14:31:10 C 06 15 38.28 -14 31 03.4 – V T05
2020-10-07 15:15:27 C 06 15 56.90 -14 29 43.4 – V T05
2020-10-07 15:19:43 C 06 15 58.70 -14 29 35.8 – V T05
2020-10-10 03:26:29 S 06 43 25.272 -12 26 51.94 – L C51
2020-10-10 05:00:33 S 06 44 10.253 -12 23 20.76 – L C51
2020-10-10 13:48:15 C 06 48 28.57 -12 03 55.2 – V T08
2020-10-10 13:54:26 C 06 48 31.47 -12 03 41.0 – V T08
2020-10-10 14:02:04 C 06 48 35.04 -12 03 23.4 – V T08
2020-10-10 14:21:52 C 06 48 44.36 -12 02 38.0 – 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)