17237+4717 STF 2164 AB (HD 157906)

17h 23m 44.61s +47° 16' 14.3" P.A. 13.00 sep 9.3 mag 8.16,9.81 Sp F8 dist. 84.82 pc (276.68 l.y.)

Coord 2000 17237+4717 Discov num STF2164 Comp AB Coord arcsec 2000 17 23 44.61 +47 16 14.3
Date first 1829 Date last 2018 Obs 35
Pa first 17 Pa last 12.7 P.A. Now (θ) 12.7°
Sep first 8.8 Sep last 9.33 Sep. Now (ρ) 9.33"
Mag pri 8.16 Mag sec 9.81 delta mag (ΔM) 1.65 Spectral class F8 (yellow-white)
Pri motion ra -021 Sec motion ra -019
Pri motion dec +036 Sec motion dec +036
Notes




rPM=0.048 (< 0.3, Physical double)

This double is physical.



17237+4717 SYSTEM COMPONENTS

Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 157906 46691 17 23 45 +47 16 14 STF 2164 AB 2018 35 13 9.3 8.16 9.81 1.65 <===
Show 46691 17 23 45 +47 16 14 WAL 80 AC 2018 9 159 112.5 8.16 12.27 4.11


Triple system
3 estimated visually detectable stars in this system



OTHER CATALOGS AND DESIGNATIONS

Name HD 157906 Constellation Hercules SAO 46691 HIP 85118
Tycho2 3512-00608-1 Gaia DR2 1365231397431575424 HD 157906 GC 23561
BD BD+47 2469 Distance 84.82 Distance ly 276.68