17174+1939 COU 496AC

 
 
17h 17m 24.44s +19 38' 34.6" P.A. 249 sep 7.6 mag 11.30,12.80 Sp G0
 
 
Coord 2000
17174+1939
Discov num
COU 496
Comp
AC
Coord arcsec 2000
17 17 24.44 +19 38 34.6
Date first
1970
Date last
2001
Obs
4
Pa first
249
Pa last
249
P.A. Now (θ)
249°
Sep first
7.1
Sep last
7.6
Sep. Now (ρ)
7.6"
Mag pri
11.30
Mag sec
12.80
delta mag (ΔM)
1.5
Spectral class
G0 (yellow)
Pri motion ra
-011
Sec motion ra
-050
Pri motion dec
+020
Sec motion dec
+012
Notes
rPM=0.774
Nature of this double is uncertain.
 
 
17174+1939 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 17174+1939 COU 496 AB 1970 2008 2 172 0.8 11.30 12.80 1.50
Show 17174+1939 COU 496 AC 1970 2001 4 249 7.6 11.30 12.80 1.50 <===
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
249.3
Precise sep
7.586
Constellation
Hercules
Tycho2
1544-01668-1
last precise pa
249.3
last precise sep
7.586
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
17174+1939 COU 496 AC 1999 3 250 7.6 11.18 12.70 D 171724.44+193834.6
17174+1939 COU 496 AC 2001 4 249 7.6 11.30 12.80 D 171724.44+193834.6

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