19563+3505 BU  980AB (Eta Cyg)

 
 
19h 56m 18.40s +35 05' 00.6" P.A. 206 sep 7.2 mag 3.89,12.00 Sp K0III
 
 
Coord 2000
19563+3505
Discov num
BU  980
Comp
AB
Coord arcsec 2000
19 56 18.40 +35 05 00.6
Date first
1879
Date last
2016
Obs
15
Pa first
209
Pa last
206
P.A. Now (θ)
206°
Sep first
7.2
Sep last
7.2
Sep. Now (ρ)
7.2"
Mag pri
3.89
Mag sec
12.00
delta mag (ΔM)
8.11
Spectral class
K0III (yellow-orange)
Pri motion ra
-034
Sec motion ra
Pri motion dec
-028
Sec motion dec
Notes
N (See Notes)
Nature of this double is uncertain.
 
 
19563+3505 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Eta Cyg 69116 19563+3505 BU 980 AB 1879 2016 15 206 7.2 3.89 12.00 8.11 <===
Show 19563+3505 HJ 1455 AC 1828 2016 14 333 45.9 3.89 10.50 6.61
Show 19563+3505 HJ 1455 AD 1879 2016 12 163 47.5 3.89 10.40 6.51
Show 19563+3505 BU 980 AE 1898 2016 8 247 56.5 3.89 11.50 7.61
Show 19563+3505 BU 980 CE 2002 2002 1 206 70.3 12.50 12.90 0.40
Show 19563+3505 BU 980 CF 2002 2013 2 264 8.3 12.50 14.70 2.20
Sextuple system
6 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
206
Precise sep
7.21
Name
Eta Cyg
Cdsa2 id
BU 980 AB
Constellation
Cygnus
SAO
69116
HD
188947
HR
7615
Bayer
Eta Cygni
Bayer name
Eta Cyg
Flamsteed
21 Cygni
Flamsteed name
21 Cyg
Ra deg
19.938444444444446
De deg
35.0835
last precise pa
206
last precise sep
7.21
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19563+3505 BU 980 AB 2007 14 206 7.8 3.89 12.00 K0III N 195618.40+350500.6
19563+3505 BU 980 AB 2016 15 206 7.2 3.89 12.00 K0III N 195618.40+350500.6

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