17237+3709 STF2161AB (Rho Her)

 
 
17h 23m 40.97s +37 08' 45.3" P.A. 320 sep 4.1 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
1779
Date last
2016
Obs
402
Pa first
300
Pa last
320
P.A. Now (θ)
320°
Sep first
3.0
Sep last
4.1
Sep. Now (ρ)
4.1"
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_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 66000 17237+3709 MCA 48 Aa,Ab 1981 2008 8 32 0.3 4.90 5.90 1.00
Show Rho Her 66000 17237+3709 STF2161 AB 1779 2016 402 320 4.1 4.50 5.40 0.90 <===
Show 66000 17237+3709 STF2161 AC 1911 2002 4 222 117.7 4.50 13.53 9.03
Quadruple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
320.3
Precise sep
4.05
Name
Rho Her
Constellation
Hercules
SAO
66000
HIP
85112
HD
157778
HR
6484
GC
23543
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
last precise pa
320.3
last precise sep
4.05
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
17237+3709 STF2161 AB 2007 344 319 4.1 4.50 5.40 B9.5III D 172340.97+370845.3
17237+3709 STF2161 AB 2008 347 319 4.0 4.50 5.40 B9.5III D 172340.97+370845.3
17237+3709 STF2161 AB 2009 362 320 4.5 4.50 5.40 B9.5III N D 172340.97+370845.3
17237+3709 STF2161 AB 2010 363 320 4.0 4.50 5.40 B9.5III N D 172340.97+370845.3
17237+3709 STF2161 AB 2012 364 321 3.9 4.50 5.40 B9.5III N D 172340.97+370845.3
17237+3709 STF2161 AB 2013 374 319 4.1 4.50 5.40 B9.5III N D 172340.97+370845.3
17237+3709 STF2161 AB 2014 377 322 3.9 4.50 5.40 B9.5III N D 172340.97+370845.3
17237+3709 STF2161 AB 2015 382 321 4.0 4.50 5.40 B9.5III N 172340.97+370845.3
17237+3709 STF2161 AB 2016 402 320 4.1 4.50 5.40 B9.5III N 172340.97+370845.3

If you need more information about this double, apply for a data request form to the WDS.