20546+4042 ES 1685BC

 
 
20h 54m 44.02s +40 41' 45.9" P.A. 74 sep 2.7 mag 14.00,14.50
 
 
Coord 2000
20546+4042
Discov num
ES 1685
Comp
BC
Coord arcsec 2000
20 54 44.02 +40 41 45.9
Date first
1917
Date last
2011
Obs
3
Pa first
75
Pa last
74
P.A. Now (θ)
74°
Sep first
1.7
Sep last
2.7
Sep. Now (ρ)
2.7"
Mag pri
14.00
Mag sec
14.50
delta mag (ΔM)
0.5
Spectral class
Pri motion ra
+013
Sec motion ra
Pri motion dec
-004
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
20546+4042 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20546+4042 ES 1685 AB 1892 2002 4 73 24.0 11.02 14.00 2.98
Show 20546+4042 ES 1685 BC 1917 2011 3 74 2.7 14.00 14.50 0.50 <===
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
73.5
Precise sep
2.74
Cdsa2 id
ES 1685 BC
Constellation
Cygnus
Ra deg
20.912227777777776
De deg
40.69608333333333
last precise pa
73.5
last precise sep
2.74
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20546+4042 ES 1685 BC 1917 1 75 1.7 14.00 14.50 205444.02+404145.9
20546+4042 ES 1685 BC 2011 2 74 2.7 14.00 14.50 205444.02+404145.9

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