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
1993-08-25 15:57:16 C 19 30 30.71 -50 10 53.5 413
1993-09-01 12:00:25 C 19 21 17.80 -49 06 47.2 413
1993-09-01 12:04:41 C 19 21 17.67 -49 06 45.2 413
1993-09-03 12:35:42 C 19 19 20.32 -48 44 53.1 413
1993-09-03 12:39:05 C 19 19 20.15 -48 44 52.4 413
1993-10-27 10:26:22 C 20 02 31.17 -36 05 05.2 413
1993-10-27 10:30:44 C 20 02 31.56 -36 05 02.1 413
1994-04-20 05:32:02 C 08 12 14.52 +39 44 55.1 z 658
1994-04-20 05:35:05 C 08 12 15.32 +39 44 50.1 z 658
1994-04-20 05:43:08 C 08 12 17.47 +39 44 37.4 z 658
1996-06-21 14:19:59 C 18 31 36.05 -44 32 57.6 413
1996-06-21 14:31:51 C 18 31 34.77 -44 33 02.4 413
1996-06-24 07:10:00 C 18 24 43.51 -44 55 37.9 z 709
1996-06-24 07:13:56 C 18 24 43.11 -44 55 38.9 z 709
1996-06-24 07:30:17 C 18 24 41.29 -44 55 43.2 z 709
1996-06-24 07:34:01 C 18 24 40.94 -44 55 45.9 z 709
1996-06-24 07:37:44 C 18 24 40.57 -44 55 46.8 z 709
1996-06-24 07:45:13 C 18 24 39.56 -44 55 48.4 z 709
1996-06-24 07:48:57 C 18 24 39.19 -44 55 48.8 z 709
1996-06-24 07:52:40 C 18 24 38.88 -44 55 49.2 z 709
2001-07-04 20:04:37 C 23 34 14.69 -29 37 18.9 e 413
2001-07-04 20:06:57 C 23 34 14.82 -29 37 19.8 e 413
2001-08-20 01:55:56 C 23 42 48.15 -43 59 16.8 c 844
2001-08-20 02:07:46 C 23 42 47.62 -43 59 28.8 c 844
2001-08-20 02:31:58 C 23 42 46.13 -43 59 53.5 c 844
2001-10-19 00:53:09 C 21 09 18.35 -42 57 31.5 d 808
2001-10-19 02:12:29 C 21 09 14.06 -42 55 55.6 d 808
2001-11-03 00:02:27 C 20 59 34.69 -34 33 11.6 d 844
2001-11-03 00:13:37 C 20 59 34.44 -34 32 53.8 d 844
2001-11-03 00:18:06 C 20 59 34.17 -34 32 47.4 d 844
2001-11-17 01:49:49 C 20 56 17.26 -24 40 49.7 c 844
2001-11-17 01:53:09 C 20 56 17.19 -24 40 45.0 c 844
2002-02-20 11:44:11 C 16 44 08.67 +19 25 52.4 c 670
2002-02-20 12:47:24 C 16 44 04.54 +19 25 17.4 c 670
2002-02-24 11:56:26 C 16 38 15.24 +18 32 09.3 c 670
2002-02-24 13:11:35 C 16 38 10.05 +18 31 29.0 c 670
2002-03-12 01:37:48 C 16 09 17.79 +15 05 32.4 d 557
2002-03-12 02:23:22 C 16 09 13.15 +15 05 06.7 d 557
2002-03-12 02:58:47 C 16 09 09.54 +15 04 46.7 d 557
2002-03-12 03:43:20 C 16 09 04.97 +15 04 21.2 d 557
2002-03-14 02:02:29 C 16 04 26.99 +14 37 35.1 d 557
2002-03-14 02:54:15 C 16 04 21.38 +14 37 04.8 d 557
2002-03-14 03:38:52 C 16 04 16.53 +14 36 38.6 d 557
2002-03-14 04:03:02 C 16 04 13.89 +14 36 24.6 d 557
2002-03-15 00:48:57 C 16 02 03.90 +14 24 06.2 c 084
2002-03-17 00:46:29 C 15 56 50.10 +13 55 21.5 c 157
2002-03-17 00:48:50 C 15 56 49.85 +13 55 19.9 c 157
2002-03-17 00:51:13 C 15 56 49.51 +13 55 18.8 c 157
2002-03-17 02:05:47 C 15 56 40.27 +13 54 27.3 c 084
2002-03-21 08:52:20 C 15 44 26.25 +12 49 16.6 15.6 c 704
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)