Double Stars
Almach in Andromeda
Eta Cassiopeia
The images below were taken with an AT8RC 8 inch Ritchey Chretien telescope at f/8, AT2FF field flattener, modified Canon 450D at ISO100. Integration times range from 0.4 to 1.5 seconds.
24 Comae Berenices – Sep. 20″; Mags. 5.1, 6.3; Spec. Class K0, A9
Xi Bootis – Sep. 6″; Mags. 4.8, 7.0; Spec. Class G8, K4
Alpha Herculis – Sep. 5″; Mags. 3.1, 5.4; Spec. Class M5, G8
95 Herculis – Sep. 6″; Mags. 4.9, 5.2; Spec. Class A5, G8
Zeta Lyrae – Sep. 44″; Mags. 4.3, 5.6; Spec. Class B7, A8