18398+2800 COU 640AB

 
 
18h 39m 47.11s +27 59' 55.9" P.A. 89 sep 0.4 mag 10.30,10.60 Sp F2
 
 
Coord 2000
18398+2800
Discov num
COU 640
Comp
AB
Coord arcsec 2000
18 39 47.11 +27 59 55.9
Date first
1971
Date last
2008
Obs
3
Pa first
96
Pa last
89
P.A. Now (θ)
89°
Sep first
0.4
Sep last
0.4
Sep. Now (ρ)
0.4"
Mag pri
10.30
Mag sec
10.60
delta mag (ΔM)
0.3
Spectral class
F2 (yellow-white)
Pri motion ra
-005
Sec motion ra
Pri motion dec
+002
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
18398+2800 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 18398+2800 COU 640 AB 1971 2008 3 89 0.4 10.30 10.60 0.30 <===
Show 18398+2800 SLE 97 AC 1982 2002 3 60 10.1 10.42 12.50 2.08
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
88.8
Precise sep
0.4
Constellation
Lyra
Tycho2
2115-00458-1
HD
336549
last precise pa
88.8
last precise sep
0.4
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18398+2800 COU 640 AB 2008 3 89 0.4 10.30 10.60 F2 183947.11+275955.9

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