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
2021-05-23 00:54:02 S 14 50 33.662 -22 42 20.99 – V C57
2021-05-23 00:54:02 s 1 -166166.94 9 +280197.12 3390.0 – C57
2021-05-23 01:04:02 S 14 50 32.830 -22 42 23.11 – V C57
2021-05-23 01:04:02 s 1 -166389.49 6 +279709.24 8500.0 – C57
2021-05-23 01:14:02 S 14 50 31.788 -22 42 21.35 – V C57
2021-05-23 01:14:02 s 1 -166611.35 6 +279220.22 1790.0 – C57
2021-05-23 01:24:02 S 14 50 30.919 -22 42 19.30 – V C57
2021-05-23 01:24:02 s 1 -166832.52 7 +278730.07 3230.0 – C57
2021-05-23 01:34:02 S 14 50 30.010 -22 42 28.94 – V C57
2021-05-23 01:34:02 s 1 -167053.00 6 +278238.78 2820.0 – C57
2021-05-23 01:44:02 S 14 50 29.299 -22 42 26.57 – V C57
2021-05-23 01:44:02 s 1 -167272.79 0 +277746.35 560.0 – C57
2021-05-23 01:54:02 S 14 50 28.157 -22 42 25.49 – V C57
2021-05-23 01:54:02 s 1 -167491.87 6 +277252.78 6450.0 – C57
2021-05-23 02:04:02 S 14 50 27.228 -22 42 27.97 – V C57
2021-05-23 02:04:02 s 1 -167710.26 3 +276758.07 460.0 – C57
2021-05-23 02:14:02 S 14 50 26.498 -22 42 29.20 – V C57
2021-05-23 02:14:02 s 1 -167927.94 6 +276262.22 2600.0 – C57
2021-05-23 02:24:02 S 14 50 25.639 -22 42 30.28 – V C57
2021-05-23 02:24:02 s 1 -168144.92 3 +275765.22 2860.0 – C57
2021-05-23 02:34:02 S 14 50 24.917 -22 42 32.58 – V C57
2021-05-23 02:34:02 s 1 -168361.19 2 +275267.09 1230.0 – C57
2021-05-23 02:44:02 S 14 50 23.904 -22 42 34.06 – V C57
2021-05-23 02:44:02 s 1 -168576.74 9 +274767.80 7700.0 – C57
2021-05-23 02:54:02 S 14 50 22.826 -22 42 36.65 – V C57
2021-05-23 02:54:02 s 1 -168791.59 1 +274267.37 2270.0 – C57
2021-05-23 03:04:02 S 14 50 21.886 -22 42 40.21 – V C57
2021-05-23 03:04:02 s 1 -169005.71 7 +273765.80 4930.0 – C57
2021-05-23 03:14:02 S 14 50 21.096 -22 42 40.86 – V C57
2021-05-23 03:14:02 s 1 -169219.12 2 +273263.08 5680.0 – C57
2021-05-23 03:24:02 S 14 50 20.261 -22 42 40.03 – V C57
2021-05-23 03:24:02 s 1 -169431.80 4 +272759.20 4500.0 – C57
2021-05-23 03:34:02 S 14 50 19.162 -22 42 45.54 – V C57
2021-05-23 03:34:02 s 1 -169643.76 0 +272254.18 1380.0 – C57
2021-05-23 03:44:02 S 14 50 18.314 -22 42 39.28 – V C57
2021-05-23 03:44:02 s 1 -169854.98 8 +271748.00 6330.0 – C57
2021-05-23 03:54:02 S 14 50 17.287 -22 42 44.32 – V C57
2021-05-23 03:54:02 s 1 -170065.48 3 +271240.68 9330.0 – C57
2021-05-23 04:04:02 S 14 50 16.402 -22 42 48.60 – V C57
2021-05-23 04:04:02 s 1 -170275.24 4 +270732.19 370.0 – C57
2021-05-23 04:14:02 S 14 50 15.533 -22 42 47.16 – V C57
2021-05-23 04:14:02 s 1 -170484.26 7 +270222.56 9460.0 – C57
2021-05-23 04:24:02 S 14 50 14.743 -22 42 44.50 – V C57
2021-05-23 04:24:02 s 1 -170692.55 0 +269711.76 6570.0 – C57
2021-05-23 04:34:02 S 14 50 13.531 -22 42 51.34 – V C57
2021-05-23 04:34:02 s 1 -170900.08 8 +269199.81 1710.0 – C57
2021-05-23 04:54:02 S 14 50 11.966 -22 42 50.29 – V C57
2021-05-23 04:54:02 s 1 -171312.92 3 +268172.43 6020.0 – C57
2021-05-23 05:04:02 S 14 50 11.076 -22 42 49.43 – V C57
2021-05-23 05:04:02 s 1 -171518.21 2 +267657.00 5180.0 – C57
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)