19559+4912 HU  688

 
 
19h 55m 54.46s +49 11' 43.6" P.A. 290 sep 3.4 mag 8.07,11.77 Sp B9 dist. 591.72 pc (1930.19 l.y.)
 
 
Coord 2000
19559+4912
Discov num
HU  688
Comp
Coord arcsec 2000
19 55 54.46 +49 11 43.6
Date first
1904
Date last
2014
Obs
6
Pa first
291
Pa last
290
P.A. Now (θ)
290°
Sep first
4.1
Sep last
3.4
Sep. Now (ρ)
3.4"
Mag pri
8.07
Mag sec
11.77
delta mag (ΔM)
3.7
Spectral class
B9 (blue-white)
Pri motion ra
+002
Sec motion ra
-004
Pri motion dec
-011
Sec motion dec
-012
Notes
rPM=0.481
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
289.8
Precise sep
3.381
Constellation
Cygnus
SAO
48994
HIP
98072
Tycho2
3566-01514-1
HD
189065
BD
BD+48 2984
Distance
591.72
Distance ly
1930.19
last precise pa
289.8
last precise sep
3.381
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19559+4912 HU 688 1991 5 290 4.0 8.07 11.77 B9 195554.46+491143.6
19559+4912 HU 688 2014 6 290 3.4 8.07 11.77 B9 195554.46+491143.6

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