18317+7120 A  1170

 
 
18h 31m 44.53s +71 20' 21.7" P.A. 187 sep 1 mag 9.83,12.25 Sp F8 dist. 293.26 pc (956.61 l.y.)
 
 
Coord 2000
18317+7120
Discov num
A  1170
Comp
Coord arcsec 2000
18 31 44.53 +71 20 21.7
Date first
1905
Date last
1991
Obs
7
Pa first
177
Pa last
187
P.A. Now (θ)
187°
Sep first
0.8
Sep last
1.0
Sep. Now (ρ)
1"
Mag pri
9.83
Mag sec
12.25
delta mag (ΔM)
2.42
Spectral class
F8 (yellow-white)
Pri motion ra
-003
Sec motion ra
-007
Pri motion dec
+002
Sec motion dec
+003
Notes
rPM=0.541
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
186.6
Precise sep
0.95
Constellation
Draco
SAO
9153
HIP
90829
Tycho2
4438-01820-1
BD
BD+71 898
Distance
293.26
Distance ly
956.61
last precise pa
186.6
last precise sep
0.95
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18317+7120 A 1170 1991 7 187 1.0 9.83 12.25 F8 183144.53+712021.7

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