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
Cdsa2 id
COU 721 AC
Constellation
Hercules
Ra deg
18.918916666666668
De deg
17.28836111111111
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

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