20487+5155 STF2732

 
 
20h 48m 42.74s +51 54' 37.1" P.A. 73 sep 4.3 mag 6.38,8.63 Sp B8np
 
 
Coord 2000
20487+5155
Discov num
STF2732
Comp
Coord arcsec 2000
20 48 42.74 +51 54 37.1
Date first
1825
Date last
2016
Obs
43
Pa first
75
Pa last
73
P.A. Now (θ)
73°
Sep first
4.4
Sep last
4.3
Sep. Now (ρ)
4.3"
Mag pri
6.38
Mag sec
8.63
delta mag (ΔM)
2.25
Spectral class
B8np (blue-white)
Pri motion ra
-001
Sec motion ra
+006
Pri motion dec
-004
Sec motion dec
+002
Notes
N (See Notes)
rPM=1.458
This double is not physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
72.6
Precise sep
4.269
Constellation
Cygnus
SAO
32908
Tycho2
3586-02802-1
HD
198513
HR
7978
last precise pa
72.6
last precise sep
4.269
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20487+5155 STF2732 2005 39 72 4.2 6.38 8.63 B8np D 204842.74+515437.1
20487+5155 STF2732 2012 41 72 4.1 6.38 8.63 B8np N D 204842.74+515437.1
20487+5155 STF2732 2016 43 73 4.3 6.38 8.63 B8np N 204842.74+515437.1

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