15394+3638 STF1965 (Zet1 CrB)

 
 
15h 39m 22.68s +36 38' 09.0" P.A. 307 sep 6.2 mag 4.96,5.91 Sp B7V+B9V dist. 145.14 pc (473.45 l.y.)
 
 
Coord 2000
15394+3638
Discov num
STF1965
Comp
Coord arcsec 2000
15 39 22.68 +36 38 09.0
Date first
1779
Date last
2016
Obs
335
Pa first
296
Pa last
307
P.A. Now (θ)
307°
Sep first
5.5
Sep last
6.2
Sep. Now (ρ)
6.2"
Mag pri
4.96
Mag sec
5.91
delta mag (ΔM)
0.95
Spectral class
B7V+B9V (blue-white/blue-white)
Pri motion ra
-017
Sec motion ra
-015
Pri motion dec
-004
Sec motion dec
-007
Notes
N (See Notes)
rPM=0.206 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
307.4
Precise sep
6.24
Name
Zet1 CrB
Constellation
Corona Borealis
SAO
64834
HIP
76669
Tycho2
2577-01754-1
HD
139892
HR
5833
GC
21063
BD
BD+37 2665
Bayer
Zeta 1 Coronae Borealis
Bayer name
Zet1 CrB
Flamsteed
7 Coronae Borealis
Flamsteed name
7 CrB
Distance
145.14
Distance ly
473.45
last precise pa
307.4
last precise sep
6.24
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
15394+3638 STF1965 2007 302 305 6.4 4.96 5.91 B7V B9V N D 153922.68+363809.0
15394+3638 STF1965 2008 304 305 6.4 4.96 5.91 B7V B9V N D 153922.68+363809.0
15394+3638 STF1965 2009 308 306 6.3 4.96 5.91 B7V B9V N D 153922.68+363809.0
15394+3638 STF1965 2010 317 306 6.0 4.96 5.91 B7V B9V N D 153922.68+363809.0
15394+3638 STF1965 2011 318 306 6.3 4.96 5.91 B7V B9V N D 153922.68+363809.0
15394+3638 STF1965 2012 321 306 6.3 4.96 5.91 B7V B9V N D 153922.68+363809.0
15394+3638 STF1965 2013 324 306 6.4 4.96 5.91 B7V B9V N D 153922.68+363809.0
15394+3638 STF1965 2014 325 306 6.4 4.96 5.91 B7V B9V N D 153922.68+363809.0
15394+3638 STF1965 2015 326 305 6.4 4.96 5.91 B7V+B9V N D 153922.68+363809.0
15394+3638 STF1965 2016 335 307 6.2 4.96 5.91 B7V+B9V N 153922.68+363809.0

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