17394-1546 HU 181 (HD 160239)

 
 
17h 39m 24.26s -15° 45' 41.4" P.A. 42.00 sep 1.0 mag 9.70,10.06 Sp G6/8V dist. 186.92 pc (609.73 l.y.)
 
 
Coord 2000 17394-1546 Discov num HU  181 Comp Coord arcsec 2000 17 39 24.26 -15 45 41.4
Date first 1900 Date last 2016 Obs 30
Pa first 95 Pa last 41.6 P.A. Now (θ) 41.6°
Sep first 0.2 Sep last 1.007 Sep. Now (ρ) 1.007"
Mag pri 9.70 Mag sec 10.06 delta mag (ΔM) 0.36 Spectral class G6/8V (yellow)
Pri motion ra -042 Sec motion ra -042
Pri motion dec -063 Sec motion dec -063
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 160239 Constellation Serpens SAO 160722 HIP 86412
Tycho2 6248-00943-1 Gaia DR2 4124955830278638208 HD 160239 ADS 10683
BD BD-15 4635 Distance 186.92 Distance ly 609.73
 
 
ORBITAL ELEMENTS
 
 
Period (P)209.66y Periastron (T)1912.36y Semi-major axis (a)0.644a
Eccentricity (e)0.676 Inclination (i)73.5° Longitude of periastron (ω)340.5°
Node (Ω)229.3° Notes ReferenceHrt2001a
Equinox2000 Last observation1998 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 40.9 0.950
2001 41.1 0.956
2002 41.3 0.962
2003 41.4 0.967
2004 41.6 0.972
2005 41.7 0.977
2006 41.9 0.982
2007 42.1 0.986
2008 42.2 0.991
2009 42.4 0.995
2010 42.5 0.999
2011 42.7 1.003
2012 42.8 1.007
2013 43.0 1.010
2014 43.1 1.013
2015 43.2 1.016
2016 43.4 1.019
2017 43.5 1.022
2018 43.7 1.025
2019 43.8 1.027
2020 44.0 1.029
2021 44.1 1.031
2022 44.2 1.033
2023 44.4 1.034
2024 44.5 1.036
2025 44.7 1.037
2026 44.8 1.038
2027 44.9 1.039
2028 45.1 1.039
2029 45.2 1.040
2030 45.3 1.040


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



 
 


wds17394-1546a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic