20406+4900 ES  509

 
 
20h 40m 38.36s +48 59' 55.9" P.A. 285 sep 8.3 mag 9.58,12.80 Sp F8
 
 
Coord 2000
20406+4900
Discov num
ES  509
Comp
Coord arcsec 2000
20 40 38.36 +48 59 55.9
Date first
1907
Date last
2010
Obs
5
Pa first
284
Pa last
285
P.A. Now (θ)
285°
Sep first
7.2
Sep last
8.3
Sep. Now (ρ)
8.3"
Mag pri
9.58
Mag sec
12.80
delta mag (ΔM)
3.22
Spectral class
F8 (yellow-white)
Pri motion ra
-008
Sec motion ra
Pri motion dec
-084
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
285.1
Precise sep
8.33
Constellation
Cygnus
last precise pa
285.1
last precise sep
8.33
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20406+4900 ES 509 2003 3 284 8.6 9.58 12.80 F8 D 204038.36+485955.9
20406+4900 ES 509 2010 5 285 8.2 9.58 12.80 F8 204038.36+485955.9

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