20173+5201 ES  660AB

 
 
20h 17m 15.58s +52 00' 37.2" P.A. 305 sep 30.1 mag 10.19,10.26 Sp A0
 
 
Coord 2000
20173+5201
Discov num
ES  660
Comp
AB
Coord arcsec 2000
20 17 15.58 +52 00 37.2
Date first
1897
Date last
2018
Obs
17
Pa first
305
Pa last
305
P.A. Now (θ)
305°
Sep first
29.8
Sep last
30.1
Sep. Now (ρ)
30.1"
Mag pri
10.19
Mag sec
10.26
delta mag (ΔM)
0.07
Spectral class
A0 (white)
Pri motion ra
-001
Sec motion ra
-002
Pri motion dec
+000
Sec motion dec
+000
Notes
rPM=0.5
Nature of this double is uncertain.
 
 
20173+5201 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20173+5201 ES 660 AB 1897 2018 17 305 30.1 10.19 10.26 0.07 <===
Show 20173+5201 ES 660 BC 1897 2018 17 291 9.5 10.26 10.33 0.07
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
305.3
Precise sep
30.06
Constellation
Cygnus
Tycho2
3584-00583-1
Gaia DR2
29815065472
HD
235163
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20173+5201 ES 660 AB 2005 9 305 29.6 10.19 10.26 A0 D 201715.58+520037.2
20173+5201 ES 660 AB 2012 11 305 29.6 10.19 10.26 A0 D 201715.58+520037.2
20173+5201 ES 660 AB 2015 12 305 30.1 10.19 10.26 A0 201715.58+520037.2
20173+5201 ES 660 AB 2018 13 305 30.1 10.19 10.26 A0 201715.58+520037.2

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