Constellation: Ursa Major.
Session: 14 Mar 2016.

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Mizar and Alcor form a naked-eye double star in the handle of the Big Dipper asterism in the constellation Ursa Major. Mizar is itself a quadruple system and Alcor is a binary, the pair together forming a sextuple system.

Mizar (Zeta Ursae Majoris, Zeta UMa, ζ Ursae Majoris, ζ UMa, known in Arabic as "المئزر" (miʼzar, meaning 'apron; wrapper, covering, cover' is a quadruple system, a visual double with a separation of 14.4 arcseconds, each of which is a spectroscopic binary, in the constellation Ursa Major and is the second star from the end of the Big Dipper's handle. Its apparent magnitude is 2.23 and its spectral class is A2V.

Source: Wikipedia
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• Optics: Skywatcher Black Diamond, 250/1200 f4.8.
• Mount: Skywatcher N-EQ6 Pro.
• Filters: ---.
• Accessories: ---.
• Camera: Canon EOS 550D Reflex camera (not modified).

Lights: 4x300s | ISO 800.

Integration: 20 mins.
Correction: Darks, Flats, Dark Flats, Bias

Notes: A little cropped.

DeepSkyStacker, Adobe Photoshop CS6.

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