17237+3709 STF 2161 AB (Rho Her)

17h 23m 40.97s +37° 08' 45.3" P.A. 321.00 sep 4.0 mag 4.50,5.40 Sp B9.5III dist. 120.63 pc (393.5 l.y.)

Coord 2000 17237+3709 Discov num STF2161 Comp AB Coord arcsec 2000 17 23 40.97 +37 08 45.3
Date first 1821 Date last 2021 Obs 417
Pa first 308 Pa last 320.9 P.A. Now (θ) 320.9°
Sep first 4.5 Sep last 4.01 Sep. Now (ρ) 4.01"
Mag pri 4.50 Mag sec 5.40 delta mag (ΔM) 0.9 Spectral class B9.5III (blue-white)
Pri motion ra -041 Sec motion ra -039
Pri motion dec +001 Sec motion dec +009
Notes N (See Notes)




rPM=0.201 (< 0.3, Physical double)

This double is physical.



17237+3709 SYSTEM COMPONENTS

Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 66000 17 23 41 +37 08 45 MCA 48 Aa,Ab 2018 10 23 0.3 4.90 5.90 1.00
Show Rho Her 66000 17 23 41 +37 08 45 STF 2161 AB 2021 417 321 4.0 4.50 5.40 0.90 <===
Show 66000 17 23 41 +37 08 45 STF 2161 AC 2020 6 221 118.4 4.50 13.53 9.03


Quadruple system
3 estimated visually detectable stars in this system



OTHER CATALOGS AND DESIGNATIONS

Name Rho Her Constellation Hercules SAO 66000 HIP 85112
Tycho2 2604-01776-1 Gaia DR2 1337345927125084416 HD 157778 HR 6484
GC 23543 ADS 10526 BD BD+37 2878 Bayer Rho Herculis
Bayer name Rho Her Flamsteed 75 Herculis Flamsteed name 75 Her Distance 120.63
Distance ly 393.5 Bayer greek ρ Her