19585+3317 STF 2606 AB (HD 189378)

 
 
19h 58m 32.66s +33 16' 38.8" P.A. 146.00 sep 0.7 mag 7.74,8.43 Sp F2I/II+F dist. 78.43 pc (255.84 l.y.)
 
 
Coord 2000 19585+3317 Discov num STF2606 Comp AB Coord arcsec 2000 19 58 32.66 +33 16 38.8
Date first 1832 Date last 2018 Obs 91
Pa first 131 Pa last 146 P.A. Now (θ) 146°
Sep first 1.2 Sep last 0.658 Sep. Now (ρ) 0.658"
Mag pri 7.74 Mag sec 8.43 delta mag (ΔM) 0.69 Spectral class F2I/II+F (yellow-white/yellow-white)
Pri motion ra +057 Sec motion ra +057
Pri motion dec +051 Sec motion dec +051
Notes O (Orbital solution)
This double is physical.
 
 
19585+3317 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 189378 69186 19 58 33 +33 16 39 STF 2606 AB 2018 91 146 0.7 7.74 8.43 0.69 Y <===
Show 69186 19 58 33 +33 16 39 GUI 29 AC 2015 13 274 168.6 7.75 9.60 1.85
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 189378 Constellation Cygnus SAO 69186 HIP 98315
Tycho2 2674-05369-1 Gaia DR2 2034389123260508672 HD 189378 GC 27675
ADS 13196 BD BD+32 3651 Distance 78.43 Distance ly 255.84
 
 
ORBITAL ELEMENTS
 
 
Period (P)455y Periastron (T)1745.7y Semi-major axis (a)1.081a
Eccentricity (e)0.69 Inclination (i)82.4° Longitude of periastron (ω)240.5°
Node (Ω)127.4° Notes ReferenceZir2015a
Equinox2000 Last observation2012 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 143.9 0.770
2001 144.0 0.764
2002 144.2 0.758
2003 144.3 0.752
2004 144.5 0.745
2005 144.7 0.739
2006 144.8 0.733
2007 145.0 0.727
2008 145.2 0.720
2009 145.3 0.714
2010 145.5 0.708
2011 145.7 0.701
2012 145.9 0.695
2013 146.0 0.688
2014 146.2 0.682
2015 146.4 0.675
2016 146.6 0.669
2017 146.8 0.662
2018 147.0 0.656
2019 147.2 0.649
2020 147.4 0.643
2021 147.7 0.636
2022 147.9 0.630
2023 148.1 0.623
2024 148.3 0.616
2025 148.6 0.610
2026 148.8 0.603
2027 149.1 0.596
2028 149.3 0.590
2029 149.6 0.583
2030 149.8 0.576


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.



 
 


wds19585%2B3317a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic