WD1640+457      SDSS          LB  953     
                PG                        
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Finding Chart (Arizona's)

Coordinates          Spectral Class    Ref.
16 40 13   +45 45.6 (1950) DA3         (1P) 
16 41 42.2 +45 40 05[2000] DA2.7       (JE)N
                           DA2.5       (6B) 

Wide Band         V     B-V    U-B   Ref.   
                             -0.828  (6B) 

Multi Channel     v     g-r          Ref.

Stromgren         y     b-y    u-b   Ref.

SDSS   g    u-g   g-r   r-i    i-z   Ref.

Absolute mag    11.1  (0) 
                10.58(JE)N
                10.52 (8) 

Mu    Theta   Ref.    VR0    Ref.     PI    ME Ref.