17472+1502 HU 1288 (HD 161819)

 
 
17h 47m 09.16s +15° 02' 13.8" P.A. 163.00 sep 0.4 mag 8.31,9.37 Sp A0 dist. 311.53 pc (1016.21 l.y.)
 
 
Coord 2000 17472+1502 Discov num HU 1288 Comp Coord arcsec 2000 17 47 09.16 +15 02 13.8
Date first 1905 Date last 2016 Obs 47
Pa first 116 Pa last 162.9 P.A. Now (θ) 162.9°
Sep first 0.2 Sep last 0.435 Sep. Now (ρ) 0.435"
Mag pri 8.31 Mag sec 9.37 delta mag (ΔM) 1.06 Spectral class A0 (white)
Pri motion ra +001 Sec motion ra +001
Pri motion dec -010 Sec motion dec -010
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 161819 Constellation Hercules SAO 103105 HIP 87047
Tycho2 1552-00152-1 HD 161819 ADS 10796 BD BD+15 3270
Distance 311.53 Distance ly 1016.21
 
 
ORBITAL ELEMENTS
 
 
Period (P)765y Periastron (T)2005y Semi-major axis (a)0.519a
Eccentricity (e)0.16 Inclination (i)64.5° Longitude of periastron (ω)355.1°
Node (Ω)159.5° Notes ReferenceZir2015a
Equinox2000 Last observation2010 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 156.0 0.432
2001 156.2 0.433
2002 156.5 0.433
2003 156.8 0.434
2004 157.1 0.434
2005 157.4 0.435
2006 157.7 0.435
2007 158.0 0.435
2008 158.2 0.436
2009 158.5 0.436
2010 158.8 0.436
2011 159.1 0.436
2012 159.4 0.436
2013 159.7 0.436
2014 159.9 0.436
2015 160.2 0.436
2016 160.5 0.436
2017 160.8 0.436
2018 161.1 0.436
2019 161.4 0.436
2020 161.6 0.436
2021 161.9 0.435
2022 162.2 0.435
2023 162.5 0.435
2024 162.8 0.434
2025 163.1 0.434
2026 163.4 0.433
2027 163.6 0.433
2028 163.9 0.432
2029 164.2 0.432
2030 164.5 0.431


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



 
 


wds17472%2B1502a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic