17308-3726 B 912 (HD 158409)

17h 30m 47.97s -37° 26' 12.9" P.A. 199.00 sep 0.3 mag 7.48,7.96 Sp A0/1(V) dist. 142.65 pc (465.32 l.y.)

Coord 2000 17308-3726 Discov num B   912 Comp Coord arcsec 2000 17 30 47.97 -37 26 12.9
Date first 1927 Date last 2021 Obs 43
Pa first 259 Pa last 199.1 P.A. Now (θ) 198.6°
Sep first 0.2 Sep last 0.275 Sep. Now (ρ) 0.295"
Mag pri 7.48 Mag sec 7.96 delta mag (ΔM) 0.48 Spectral class A0/1(V) (white)
Pri motion ra -003 Sec motion ra
Pri motion dec -032 Sec motion dec
Notes N O (See Notes, Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Name HD 158409 Constellation Scorpius SAO 208897 HIP 85700
Tycho2 7387-00852-1 Gaia DR2 5974203030900047232 HD 158409 GC 23694
CD CD-3711639 CP CP-37 7240 Distance 142.65 Distance ly 465.32




ORBITAL ELEMENTS

Period (P)132.256y Periastron (T)1944.75y Semi-major axis (a)0.297a
Eccentricity (e)0.113 Inclination (i)44.9° Longitude of periastron (ω)116.2°
Node (Ω)226.8° Notesn ReferenceMsn2011c
Equinox2000 Last observation2010 Grade3(1=Definitive, 9=Indet.)

label theta rho
2000 140.0 0.232
2001 143.1 0.233
2002 146.2 0.234
2003 149.3 0.236
2004 152.3 0.237
2005 155.3 0.239
2006 158.2 0.242
2007 161.1 0.244
2008 163.9 0.247
2009 166.6 0.250
2010 169.3 0.253
2011 171.9 0.256
2012 174.4 0.259
2013 176.9 0.263
2014 179.3 0.266
2015 181.7 0.270
2016 184.0 0.273
2017 186.2 0.276
2018 188.4 0.280
2019 190.5 0.283
2020 192.6 0.286
2021 194.7 0.289
2022 196.7 0.292
2023 198.6 0.295
2024 200.6 0.298
2025 202.4 0.300
2026 204.3 0.302
2027 206.1 0.305
2028 207.9 0.306
2029 209.7 0.308
2030 211.5 0.309


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



 
 


wds17308-3726a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic