20406+4900 ES  509

 
 
20h 40m 38.36s +48 59' 55.9" P.A. 285 sep 8.6 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
2015
Obs
6
Pa first
284
Pa last
285
P.A. Now (θ)
285°
Sep first
7.2
Sep last
8.6
Sep. Now (ρ)
8.6"
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
284.8
Precise sep
8.558
Constellation
Cygnus
SAO
49928
Tycho2
3582-01744-1
Gaia DR2
77755841408
 
 
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
20406+4900 ES 509 2015 6 285 8.6 9.58 12.80 F8 204038.36+485955.9

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