19069+4137 COU 2197 (HD 178474)

19h 06m 56.22s +41° 37' 19.6" P.A. 320.00 sep 0.3 mag 9.10,9.10 Sp F5

Coord 2000 19069+4137 Discov num COU2197 Comp Coord arcsec 2000 19 06 56.22 +41 37 19.6
Date first 1984 Date last 2014 Obs 16
Pa first 103 Pa last 320.1 P.A. Now (θ) 320.1°
Sep first 0.2 Sep last 0.262 Sep. Now (ρ) 0.262"
Mag pri 9.10 Mag sec 9.10 delta mag (ΔM) 0 Spectral class F5 (yellow-white)
Pri motion ra +010 Sec motion ra
Pri motion dec +012 Sec motion dec
Notes N O (See Notes, Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Name HD 178474 Constellation Lyra SAO 48095 Tycho2 3128-01528-1
Gaia DR2 2100926344252059904 HD 178474




ORBITAL ELEMENTS

Period (P)46.59y Periastron (T)2024.45y Semi-major axis (a)0.203a
Eccentricity (e)0.167 Inclination (i)146.7° Longitude of periastron (ω)188.8°
Node (Ω)23.1° Notesn ReferenceDoc2016g
Equinox2000 Last observation2008 Grade5(1=Definitive, 9=Indet.)

label theta rho
2000 21.1 0.237
2001 16.5 0.236
2002 11.7 0.235
2003 6.9 0.232
2004 2.0 0.229
2005 356.9 0.224
2006 351.5 0.219
2007 345.9 0.213
2008 340.0 0.207
2009 333.6 0.200
2010 326.8 0.193
2011 319.5 0.186
2012 311.7 0.180
2013 303.3 0.174
2014 294.4 0.170
2015 285.2 0.166
2016 275.5 0.164
2017 265.8 0.164
2018 256.0 0.164
2019 246.3 0.165
2020 236.7 0.167
2021 227.4 0.168
2022 218.1 0.169
2023 209.0 0.170
2024 199.9 0.169
2025 190.6 0.168
2026 181.1 0.165
2027 171.4 0.162
2028 161.3 0.160
2029 150.8 0.158
2030 140.2 0.157


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



 
 


wds19069%2B4137b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic