Y Cyg 
RA (2000.0): 205203.57 Dec. (2000.0): +343926.6 Type : EA/DM Mag. max : 7.30 Mag. min : 7.90 Mag. system : V Epoch (JD) : 09453.4192 Period (day) : 2.9963328 D : 10 Spec. : B0IV+B0IV
Page based on GCVS elements
GIF chart based on Hipparcos & Tycho
GIF chart based on Hipparcos & Tycho (2)
GIF chart based on GSC and Tycho-2 magnitudes (V,B-V)
GIF chart based on HIC
GIF chart based on TAC
Latest VSNET light curve
VSNET light curve interactive page
VSNET Data Search (CYGY)
VSOLJ light curve
VSOLJ data (in JD) [instructions to usage]
VSOLJ data (in UT) [instructions to usage]
VSOLJ light curve interactive page
Request VSOLJ data to Makoto Watanabe (VSOLJ database manager)
Request VSOLJ data to Makoto Watanabe (VSOLJ database manager)
2MASS survey page
[2MASS Visualizer]
ASAS survey page [data access] [ASAS page]
VSNET/Internet Article Search
vsnet-adm@kusastro.kyoto-u.ac.jp