18421+3445 STF 2372 AB (HD 173087)

 
 
18h 42m 08.09s +34° 44' 46.7" P.A. 82.00 sep 25.0 mag 6.45,7.73 Sp B5V dist. 456.62 pc (1489.49 l.y.)
 
 
Coord 2000 18421+3445 Discov num STF2372 Comp AB Coord arcsec 2000 18 42 08.09 +34 44 46.7
Date first 1782 Date last 2019 Obs 79
Pa first 85 Pa last 82.3 P.A. Now (θ) 82.3°
Sep first 22.9 Sep last 25.009 Sep. Now (ρ) 25.009"
Mag pri 6.45 Mag sec 7.73 delta mag (ΔM) 1.28 Spectral class B5V (blue-white)
Pri motion ra +000 Sec motion ra +001
Pri motion dec -004 Sec motion dec -003
Notes N Y (See Notes, Parallax indicates components are non-physical)
rPM=0.354
This double is not physical.
 
 
18421+3445 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 67265 18 42 08 +34 44 47 B 2546 Aa,Ab 2016 45 24 0.1 6.50 7.50 1.00 Y
Show HD 173087 67265 18 42 08 +34 44 47 STF 2372 AB 2019 79 82 25.0 6.45 7.73 1.28 <===
Show 67265 18 42 08 +34 44 47 BLL 34 AC 2013 9 69 114.0 6.45 11.79 5.34
Show 18 42 10 +34 44 50 BLL 34 BC 2015 16 65 91.1 7.73 11.79 4.06
Quadruple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 173087 Constellation Lyra SAO 67265 HIP 91707
Tycho2 2645-02013-1 Gaia DR2 2091774627937648256 HD 173087 HR 7033
GC 25597 ADS 11593 BD BD+34 3285 Distance 456.62
Distance ly 1489.49