20414+4758 ES  809AB

 
 
20h 41m 24.21s +47 59' 40.6" P.A. 285 sep 1.6 mag 11.46,12.03 Sp OB-
 
 
Coord 2000
20414+4758
Discov num
ES  809
Comp
AB
Coord arcsec 2000
20 41 24.21 +47 59 40.6
Date first
1909
Date last
2015
Obs
5
Pa first
271
Pa last
285
P.A. Now (θ)
285°
Sep first
2.6
Sep last
1.6
Sep. Now (ρ)
1.6"
Mag pri
11.46
Mag sec
12.03
delta mag (ΔM)
0.57
Spectral class
OB- (blue)
Pri motion ra
-005
Sec motion ra
-005
Pri motion dec
-003
Sec motion dec
-003
Notes
Nature of this double is uncertain.
 
 
20414+4758 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20414+4758 ES 809 AB 1909 2015 5 285 1.6 11.46 12.03 0.57 <===
Show 20414+4758 SKF2394 AC 2000 2015 5 68 3.0 11.46 13.00 1.54
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
284.9
Precise sep
1.57
Constellation
Cygnus
Tycho2
3578-02948-1
Gaia DR2
2167586362688808576
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20414+4758 ES 809 AB 1991 4 290 1.5 11.46 12.03 OB- 204124.21+475940.6
20414+4758 ES 809 AB 2015 5 285 1.6 11.46 12.03 OB- 204124.21+475940.6

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