18551+1717 COU 721AC

 
 
18h 55m 08.10s +17 17' 18.1" P.A. 149 sep 17.5 mag 9.30,11.00 Sp G0
 
 
Coord 2000
18551+1717
Discov num
COU 721
Comp
AC
Coord arcsec 2000
18 55 08.10 +17 17 18.1
Date first
1899
Date last
2015
Obs
8
Pa first
160
Pa last
149
P.A. Now (θ)
149°
Sep first
16.8
Sep last
17.5
Sep. Now (ρ)
17.5"
Mag pri
9.30
Mag sec
11.00
delta mag (ΔM)
1.7
Spectral class
G0 (yellow)
Pri motion ra
-017
Sec motion ra
+007
Pri motion dec
-008
Sec motion dec
+002
Notes
rPM=1.384
This double is not physical.
 
 
18551+1717 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 18551+1717 COU 721 AB 1971 2007 3 302 3.4 9.30 11.40 2.10
Show 18551+1717 COU 721 AC 1899 2015 8 149 17.5 9.30 11.00 1.70 <===
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
149.1
Precise sep
17.471
Constellation
Hercules
last precise pa
149.1
last precise sep
17.471
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18551+1717 COU 721 AC 2007 4 149 17.6 9.30 11.00 G0 D 185508.10+171718.1
18551+1717 COU 721 AC 2015 6 149 17.5 9.30 11.00 G0 185508.10+171718.1

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