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
2013-04-26 04:05:10 C 12 02 26.49 +17 47 04.8 u H21
2013-04-26 04:11:40 C 12 02 26.41 +17 46 52.2 u H21
2013-04-26 04:17:43 C 12 02 26.37 +17 46 40.6 u H21
2013-04-28 13:52:03 C 12 02 12.61 +15 59 08.1 r D29
2013-04-28 14:31:11 C 12 02 12.35 +15 57 57.3 r D29
2013-04-28 15:10:19 C 12 02 12.11 +15 56 46.3 r D29
2013-05-02 21:42:59 C 12 02 32.41 +13 01 43.0 i C91
2013-05-02 21:47:00 C 12 02 32.41 +13 01 36.8 i C91
2013-05-02 21:51:59 C 12 02 32.47 +13 01 28.3 i C91
2013-05-02 21:56:00 C 12 02 32.45 +13 01 21.9 i C91
2013-05-02 22:00:00 C 12 02 32.46 +13 01 15.4 i C91
2013-05-02 22:03:59 C 12 02 32.50 +13 01 09.1 i C91
2013-05-02 22:07:59 C 12 02 32.50 +13 01 02.4 i C91
2013-05-03 21:47:45 C 12 02 44.58 +12 23 19.8 o A32
2013-05-03 21:50:16 C 12 02 44.60 +12 23 15.9 o A32
2013-05-03 21:52:47 C 12 02 44.61 +12 23 11.6 o A32
2013-05-13 02:01:28 C 12 06 26.74 +07 13 07.8 u H21
2013-05-13 02:05:57 C 12 06 26.83 +07 13 02.1 u H21
2013-05-13 02:10:08 C 12 06 26.91 +07 12 56.8 u H21
2013-05-13 02:14:37 C 12 06 27.00 +07 12 51.1 u H21
2013-06-04 04:13:20 C 12 25 06.99 -01 51 09.6 u 703
2013-06-04 04:21:19 C 12 25 07.32 -01 51 15.8 u 703
2013-06-04 04:29:23 C 12 25 07.64 -01 51 23.1 u 703
2013-06-04 04:37:29 C 12 25 07.96 -01 51 29.3 u 703
2015-03-21 14:46:40 C 19 09 50.970 -28 51 36.71 L F51
2015-03-21 14:52:22 C 19 09 51.407 -28 51 37.70 L F51
2015-03-21 14:58:07 C 19 09 51.819 -28 51 38.69 L F51
2015-03-21 15:03:54 C 19 09 52.265 -28 51 39.37 L F51
2015-06-01 06:20:00 C 20 24 19.06 -38 05 11.5 u 807
2015-06-01 06:24:52 C 20 24 19.00 -38 05 14.7 u 807
2015-06-01 06:30:00 C 20 24 18.93 -38 05 17.8 u 807
2015-06-01 06:34:35 C 20 24 18.87 -38 05 20.5 u 807
2015-06-01 06:39:31 C 20 24 18.82 -38 05 23.7 u 807
2015-06-10 14:03:42 C 20 19 27.868 -40 32 28.97 L F51
2015-06-10 14:10:23 C 20 19 27.626 -40 32 33.46 L F51
2015-06-10 14:17:02 C 20 19 27.370 -40 32 38.12 L F51
2015-06-10 14:23:42 C 20 19 27.126 -40 32 42.62 L F51
2015-07-04 06:20:46 C 19 40 40.57 -46 47 23.8 u 807
2015-07-04 06:25:06 C 19 40 40.17 -46 47 26.6 u 807
2015-07-04 06:29:37 C 19 40 39.68 -46 47 28.2 u 807
2015-07-04 06:33:43 C 19 40 39.24 -46 47 30.2 u 807
2015-07-04 06:38:16 C 19 40 38.79 -46 47 32.6 u 807
2018-01-27 12:50:01 C 16 25 42.90 -18 16 09.7 U G96
2018-01-27 12:56:13 C 16 25 43.48 -18 16 12.9 U G96
2018-01-27 13:02:27 C 16 25 44.09 -18 16 15.3 U G96
2018-01-27 13:08:39 C 16 25 44.68 -18 16 18.6 U G96
2020-07-02 14:11:04 C 00 34 40.31 -18 46 18.1 V T08
2020-07-02 14:17:02 C 00 34 40.77 -18 46 17.3 V T08
2020-07-02 14:28:59 C 00 34 41.81 -18 46 16.5 V T08
2020-07-02 14:48:55 C 00 34 43.51 -18 46 14.6 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)