18428+5938 STF 2398 BC

 
 
18h 42m 46.90s +59° 37' 36.6" P.A. 157.00 sep 202.7 mag 9.96,12.24 Sp M3.5V dist. 3.45 pc (11.25 l.y.)
 
 
Coord 2000 18428+5938 Discov num STF2398 Comp BC Coord arcsec 2000 18 42 46.90 +59 37 36.6
Date first 1904 Date last 2000 Obs 18
Pa first 261 Pa last 157.1 P.A. Now (θ) 157.1°
Sep first 54.2 Sep last 202.72 Sep. Now (ρ) 202.72"
Mag pri 9.96 Mag sec 12.24 delta mag (ΔM) 2.28 Spectral class M3.5V (red)
Pri motion ra -139 Sec motion ra -001
Pri motion dec +185 Sec motion dec -001
Notes N L P (See Notes, Linear solution, 100-year proper motion)
rPM=1.001
This double is not physical.
 
 
18428+5938 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 173739 31128 18 42 47 +59 37 49 STF 2398 AB 2020 641 181 11.4 9.11 9.96 0.85 Y
Show 31128 18 42 47 +59 37 49 STF 2398 AC 2013 21 158 216.8 9.11 12.24 3.13
Show 31128 18 42 47 +59 37 49 POP 1224 AD 2008 3 110 100.0 9.11 13.50 4.39
Show 31129 18 42 47 +59 37 37 STF 2398 BC 2000 18 157 202.7 9.96 12.24 2.28 <===
Quadruple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Draco SAO 31129 HIP 91772 Tycho2 3930-01791-2
HD 173740 GC 25649 GL Gl 725B DM BD+59 1915
Distance 3.45 Distance ly 11.25