18551+1644 WFC 216

 
 
18h 55m 04.26s +16 44' 20.3" P.A. 89 sep 12 mag 9.07,9.55 Sp A2
 
 
Coord 2000
18551+1644
Discov num
WFC 216
Comp
Coord arcsec 2000
18 55 04.26 +16 44 20.3
Date first
1896
Date last
2016
Obs
13
Pa first
92
Pa last
89
P.A. Now (θ)
89°
Sep first
12.4
Sep last
12.0
Sep. Now (ρ)
12"
Mag pri
9.07
Mag sec
9.55
delta mag (ΔM)
0.48
Spectral class
A2 (white)
Pri motion ra
+000
Sec motion ra
+000
Pri motion dec
-016
Sec motion dec
-011
Notes
rPM=0.312
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
88.7
Precise sep
12.031
Constellation
Hercules
SAO
104255
Tycho2
1584-03164-1
HD
175512
last precise pa
88.7
last precise sep
12.031
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18551+1644 WFC 216 2004 7 89 11.9 9.07 9.55 D 185504.26+164420.3
18551+1644 WFC 216 2010 11 89 11.5 9.07 9.55 A2 185504.26+164420.3
18551+1644 WFC 216 2015 12 88 11.9 9.07 9.55 A2 185504.26+164420.3
18551+1644 WFC 216 2016 13 89 12.0 9.07 9.55 A2 185504.26+164420.3

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