18171-4336 HDS 2583 (HD 167384)

18h 17m 03.81s -43° 35' 41.3" P.A. 10.00 sep 0.1 mag 8.88,9.95 Sp G8/K0III+ dist. 395.26 pc (1289.34 l.y.)

Coord 2000 18171-4336 Discov num HDS2583 Comp Coord arcsec 2000 18 17 03.81 -43 35 41.3
Date first 1991 Date last 2021 Obs 12
Pa first 190 Pa last 9.8 P.A. Now (θ) 9.8°
Sep first 0.1 Sep last 0.064 Sep. Now (ρ) 0.064"
Mag pri 8.88 Mag sec 9.95 delta mag (ΔM) 1.07 Spectral class G8/K0III+ (yellow)
Pri motion ra +005 Sec motion ra
Pri motion dec -010 Sec motion dec
Notes O (Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Name HD 167384 Constellation Corona Austrina SAO 228868 HIP 89599
Tycho2 7912-00277-1 Gaia DR2 6721194978662666624 HD 167384 CD CD-4312414
CP CP-43 8532 Distance 395.26 Distance ly 1289.34




ORBITAL ELEMENTS

Period (P)332.169y Periastron (T)2014.309y Semi-major axis (a)0.196a
Eccentricity (e)0.718 Inclination (i)148.4° Longitude of periastron (ω)291.1°
Node (Ω)8.9° Notes ReferenceTok2018e
Equinox2000 Last observation2018 Grade4(1=Definitive, 9=Indet.)

label theta rho
2000 170.8 0.093
2001 167.8 0.089
2002 164.6 0.085
2003 160.9 0.080
2004 156.9 0.076
2005 152.4 0.072
2006 147.2 0.067
2007 141.4 0.063
2008 134.8 0.059
2009 127.4 0.056
2010 118.9 0.053
2011 109.5 0.050
2012 99.3 0.048
2013 88.6 0.048
2014 77.8 0.048
2015 67.3 0.049
2016 57.4 0.051
2017 48.4 0.054
2018 40.2 0.057
2019 32.9 0.060
2020 26.4 0.063
2021 20.6 0.067
2022 15.3 0.070
2023 10.6 0.074
2024 6.3 0.078
2025 2.4 0.081
2026 358.8 0.085
2027 355.5 0.088
2028 352.4 0.091
2029 349.6 0.095
2030 346.9 0.098


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



 
 


wds18171-4336b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic