20328+3954 ES 1680BC

 
 
20h 32m 45.08s +39 55' 11.5" P.A. 28 sep 2.7 mag 11.56,12.30
 
 
Coord 2000
20328+3954
Discov num
ES 1680
Comp
BC
Coord arcsec 2000
20 32 45.08 +39 55 11.5
Date first
1917
Date last
2015
Obs
6
Pa first
21
Pa last
28
P.A. Now (θ)
28°
Sep first
2.3
Sep last
2.7
Sep. Now (ρ)
2.7"
Mag pri
11.56
Mag sec
12.30
delta mag (ΔM)
0.74
Spectral class
Pri motion ra
-014
Sec motion ra
+046
Pri motion dec
-040
Sec motion dec
+083
Notes
N U (See Notes, Proper motion indicates non-physical)
rPM=1.442
This double is not physical.
 
 
20328+3954 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20328+3954 ES 1680 AB 1892 2013 8 5 51.0 9.91 11.56 1.65
Show 20328+3954 ES 1680 BC 1917 2015 6 28 2.7 11.56 12.30 0.74 <===
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
28.1
Precise sep
2.7
Constellation
Cygnus
last precise pa
28.1
last precise sep
2.7
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20328+3954 ES 1680 BC 1975 4 28 2.6 11.56 12.30 N 203245.08+395511.5
20328+3954 ES 1680 BC 2011 5 21 2.7 11.56 12.30 Nu 203245.08+395511.5
20328+3954 ES 1680 BC 2015 6 28 2.7 11.56 12.30 Nu 203245.08+395511.5

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