18217+2356 COU 418

 
 
18h 21m 44.75s +23 55' 49.9" P.A. 262 sep 0.2 mag 9.63,9.89 Sp F8 dist. 740.74 pc (2416.29 l.y.)
 
 
Coord 2000
18217+2356
Discov num
COU 418
Comp
Coord arcsec 2000
18 21 44.75 +23 55 49.9
Date first
1969
Date last
1996
Obs
14
Pa first
234
Pa last
262
P.A. Now (θ)
262°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.2"
Mag pri
9.63
Mag sec
9.89
delta mag (ΔM)
0.26
Spectral class
F8 (yellow-white)
Pri motion ra
+001
Sec motion ra
Pri motion dec
+012
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
261.7
Precise sep
0.181
Constellation
Hercules
SAO
85968
HIP
89994
Tycho2
2093-01299-1
HD
169030
BD
BD+23 3312
Distance
740.74
Distance ly
2416.29
last precise pa
261.7
last precise sep
0.181
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18217+2356 COU 418 1996 14 82 0.2 9.89 9.63 F8 182144.75+235549.9

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