19404+3121 SEI 657AB

 
 
19h 40m 21.57s +31 21' 26.4" P.A. 357 sep 19.3 mag 8.91,11.01 Sp F8V
 
 
Coord 2000
19404+3121
Discov num
SEI 657
Comp
AB
Coord arcsec 2000
19 40 21.57 +31 21 26.4
Date first
1893
Date last
2017
Obs
9
Pa first
357
Pa last
357
P.A. Now (θ)
357°
Sep first
19.2
Sep last
19.3
Sep. Now (ρ)
19.3"
Mag pri
8.91
Mag sec
11.01
delta mag (ΔM)
2.1
Spectral class
F8V (yellow-white)
Pri motion ra
-001
Sec motion ra
+001
Pri motion dec
-002
Sec motion dec
-001
Notes
rPM=1
This double is not physical.
 
 
19404+3121 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 19404+3121 COU1163 Aa,Ab 1974 2007 6 165 0.1 9.50 9.50 0.00
Show 19404+3121 SEI 657 AB 1893 2017 9 357 19.3 8.91 11.01 2.10 <===
Triple system
2 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
356.8
Precise sep
19.313
Constellation
Cygnus
SAO
68670
Tycho2
2656-04841-1
Gaia DR2
89388971904
HD
331099
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19404+3121 SEI 657 AB 2002 6 357 19.2 8.91 11.01 D 194021.57+312126.4
19404+3121 SEI 657 AB 2017 8 357 19.3 8.91 11.01 F8V 194021.57+312126.4

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