19420+4015 KUI 94 (HD 186307)

 
 
19h 41m 57.63s +40 15' 14.6" P.A. 158.00 sep 0.5 mag 6.50,7.80 Sp A6V dist. 81.57 pc (266.08 l.y.)
 
 
Coord 2000 19420+4015 Discov num KUI  94 Comp Coord arcsec 2000 19 41 57.63 +40 15 14.6
Date first 1937 Date last 2014 Obs 67
Pa first 160 Pa last 157.9 P.A. Now (θ) 153°
Sep first 0.5 Sep last 0.467 Sep. Now (ρ) 0.448"
Mag pri 6.50 Mag sec 7.80 delta mag (ΔM) 1.3 Spectral class A6V (white)
Pri motion ra -010 Sec motion ra
Pri motion dec +030 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 186307 Constellation Cygnus SAO 48737 HIP 96907
Tycho2 3140-02348-1 Gaia DR2 2076394762376371200 HD 186307 HR 7499
GC 27275 BD BD+39 3878 Distance 81.57 Distance ly 266.08
 
 
ORBITAL ELEMENTS
 
 
Period (P)79y Periastron (T)1981y Semi-major axis (a)0.34a
Eccentricity (e)0.38 Inclination (i)106° Longitude of periastron (ω)12°
Node (Ω)338° Notesn ReferenceSod1999
Equinox2000 Last observation Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 171.2 0.296
2001 169.8 0.315
2002 168.5 0.334
2003 167.4 0.351
2004 166.3 0.366
2005 165.4 0.381
2006 164.5 0.395
2007 163.6 0.407
2008 162.8 0.418
2009 162.1 0.428
2010 161.4 0.436
2011 160.7 0.444
2012 160.0 0.450
2013 159.4 0.456
2014 158.7 0.460
2015 158.1 0.463
2016 157.5 0.465
2017 156.8 0.465
2018 156.2 0.465
2019 155.6 0.464
2020 155.0 0.461
2021 154.3 0.458
2022 153.7 0.453
2023 153.0 0.448
2024 152.3 0.441
2025 151.6 0.434
2026 150.9 0.425
2027 150.1 0.415
2028 149.4 0.405
2029 148.5 0.393
2030 147.6 0.381


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



 
 


wds19420%2B4015a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic