20151+4118 A   387AC

 
 
20h 15m 08.10s +41 17' 55.4" P.A. 222.00 sep 21.6 mag 7.90,10.75 Sp B9II-III dist. 1219.51 pc (3978.04 l.y.)
 
 
Coord 2000
20151+4118
Discov num
A   387
Comp
AC
Coord arcsec 2000
20 15 08.10 +41 17 55.4
Date first
1892
Date last
2016
Obs
12
Pa first
221
Pa last
222
P.A. Now (θ)
222°
Sep first
23.4
Sep last
21.6
Sep. Now (ρ)
21.6"
Mag pri
7.90
Mag sec
10.75
delta mag (ΔM)
2.85
Spectral class
B9II-III (blue-white)
Pri motion ra
-001
Sec motion ra
+007
Pri motion dec
-001
Sec motion dec
+005
Notes
N (See Notes)
Visually invisible, K-band or other infrared star rPM=1.162
This double is not physical.
 
 
20151+4118 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 49365 20151+4118 A 387 AB 1902 2016 12 151 5.1 7.90 11.48 3.58
Show 49365 20151+4118 A 387 AC 1892 2016 12 222 21.6 7.90 10.75 2.85 <===
Show 49365 20151+4118 A 387 CD 1998 2015 7 19 9.0 10.75 13.00 2.25
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
222.2
Precise sep
21.62
Constellation
Cygnus
SAO
49365
HIP
99813
Tycho2
3159-00995-1
Gaia DR2
99174311296
HD
192803
BD
BD+40 4077
Distance
1219.51
Distance ly
3978.04
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20151+4118 A 387 AC 1998 5 221 21.9 7.90 10.75 B9II-III N D 201508.10+411755.4
20151+4118 A 387 AC 2002 6 222 21.9 7.90 10.75 B9II-III N D 201508.10+411755.4
20151+4118 A 387 AC 2016 7 222 21.6 7.90 10.75 B9II-III N 201508.10+411755.4

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