20189+3945 COU2537

 
 
20h 18m 53.24s +39 45' 09.5" P.A. 294 sep 0.8 mag 10.05,10.29 Sp B1III
 
 
Coord 2000
20189+3945
Discov num
COU2537
Comp
Coord arcsec 2000
20 18 53.24 +39 45 09.5
Date first
1989
Date last
2008
Obs
3
Pa first
295
Pa last
294
P.A. Now (θ)
294°
Sep first
0.5
Sep last
0.8
Sep. Now (ρ)
0.8"
Mag pri
10.05
Mag sec
10.29
delta mag (ΔM)
0.24
Spectral class
B1III (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
293.7
Precise sep
0.779
Constellation
Cygnus
SAO
69817
Tycho2
3155-00048-1
Gaia DR2
11992140800
HD
228875
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20189+3945 COU2537 1991 2 310 0.4 10.05 10.29 B1III 201853.24+394509.5
20189+3945 COU2537 2008 3 294 0.8 10.05 10.29 B1III 201853.24+394509.5

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