20205+4122 LI    5AB (V1685 Cyg)

 
 
20h 20m 28.24s +41 21' 51.5" P.A. 145 sep 8.8 mag 10.95,15.90 Sp B2 dist. 79.49 pc (259.3 l.y.)
 
 
Coord 2000
20205+4122
Discov num
LI    5
Comp
AB
Coord arcsec 2000
20 20 28.24 +41 21 51.5
Date first
1992
Date last
2015
Obs
9
Pa first
142
Pa last
145
P.A. Now (θ)
145°
Sep first
8.6
Sep last
8.8
Sep. Now (ρ)
8.8"
Mag pri
10.95
Mag sec
15.90
delta mag (ΔM)
4.95
Spectral class
B2 (blue-white)
Pri motion ra
-003
Sec motion ra
+060
Pri motion dec
-006
Sec motion dec
+086
Notes
rPM=1.063
This double is not physical.
 
 
20205+4122 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show V1685 Cyg 20205+4122 LI 5 AB 1992 2015 9 145 8.8 10.95 15.90 4.95 <===
Show 20205+4122 FAB 15 AC 1892 2015 13 203 19.5 10.95 12.81 1.86
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
145.3
Precise sep
8.777
Var name
V1685 Cyg
Constellation
Cygnus
HIP
100289
Tycho2
3160-00391-1
Gaia DR2
76220219648
BD
BD+40 4124
Distance
79.49
Distance ly
259.3
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20205+4122 LI 5 AB 1992 2 322 8.6 10.95 15.90 B2 D 202028.24+412151.5
20205+4122 LI 5 AB 1998 3 145 8.2 10.95 15.90 B2 D 202028.24+412151.5
20205+4122 LI 5 AB 2009 3 144 8.3 10.95 15.90 B2 D 202028.24+412151.5
20205+4122 LI 5 AB 2015 5 145 8.8 10.95 15.90 B2 202028.24+412151.5

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