21139+3830 COU1817

 
 
21h 13m 56.08s +38 29' 54.9" P.A. 111 sep 0.5 mag 9.53,10.27 Sp B8
 
 
Coord 2000
21139+3830
Discov num
COU1817
Comp
Coord arcsec 2000
21 13 56.08 +38 29 54.9
Date first
1979
Date last
2011
Obs
6
Pa first
112
Pa last
111
P.A. Now (θ)
111°
Sep first
0.6
Sep last
0.5
Sep. Now (ρ)
0.5"
Mag pri
9.53
Mag sec
10.27
delta mag (ΔM)
0.74
Spectral class
B8 (blue-white)
Pri motion ra
+002
Sec motion ra
+002
Pri motion dec
-004
Sec motion dec
-004
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
110.8
Precise sep
0.53
Constellation
Cygnus
SAO
71098
Tycho2
3169-01863-1
Gaia DR2
54662707328
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21139+3830 COU1817 1995 3 107 0.6 9.53 10.27 B8 211356.08+382954.9
21139+3830 COU1817 2008 4 108 0.6 9.53 10.27 B8 211356.08+382954.9
21139+3830 COU1817 2011 6 111 0.5 9.53 10.27 B8 211356.08+382954.9

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