20421+5436 ES  994

 
 
20h 42m 10.47s +54 35' 48.8" P.A. 11.00 sep 4.7 mag 10.36,12.50 Sp F8
 
 
Coord 2000
20421+5436
Discov num
ES  994
Comp
Coord arcsec 2000
20 42 10.47 +54 35 48.8
Date first
1910
Date last
2016
Obs
4
Pa first
12
Pa last
11
P.A. Now (θ)
11°
Sep first
5.8
Sep last
4.7
Sep. Now (ρ)
4.7"
Mag pri
10.36
Mag sec
12.50
delta mag (ΔM)
2.14
Spectral class
F8 (yellow-white)
Pri motion ra
+007
Sec motion ra
Pri motion dec
+007
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
11.3
Precise sep
4.71
Constellation
Cygnus
Tycho2
3955-02396-1
Gaia DR2
50892068224
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20421+5436 ES 994 1910 1 12 5.8 10.36 12.50 204210.47+543548.8
20421+5436 ES 994 2011 2 14 4.8 10.36 12.50 204210.47+543548.8
20421+5436 ES 994 2016 4 11 4.7 10.36 12.50 F8 204210.47+543548.8

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