Perseus
Perseus is a Northern Hemisphere constellation otherwise known as the Hero. It is one of the 48 Greek constellations originally described by the 2nd century astronomer Claudius Ptolemy (Wikipedia). Perseus remains one of the 88 modern constellations defined by the International Astronomical Union (Wikipedia).
Perseus (abbrev. = Per; genitive = Persei) covers 615 square degrees or 1.49% of the celestial sphere making it the 24th largest constellation. It contains 158 stars brighter than apparent magnitude 6.5, the brightest star being Mirphak. See the Perseus Star Chart for a figure illustrating this constellation including the identification of its brighter stars.
For more information see the entries for Perseus at Wikipedia and U. Wisconsin. For a chart of Perseus, see Per (IAU).
Technical Details
- Object: Perseus
- Date/Time: 2012 Feb 23 at 03:56 UTC
- Location: Bifrost Astronomical Observatory, Portal, AZ
- Mount: Losmandy G-11 German Equatorial Mount
- Lens: Nikkor AI 35mm f/2
- Camera: Canon EOS 550D (Rebel T2i)
- Field of View: 35.3° x 24.0° at 24.5 arc-sec/pixel (web version: 138 arc-sec/pixel)
- Exposure: 2 x 240s, f/4, ISO 800 and 120s, f/4, ISO 800 with Cokin A840 Diffusion Filter
- File Name: Per-01w.jpg
- Processing (Adobe Camera Raw): Color Balance, Vignetting, Noise Reduction
- Processing (Photoshop CS5): Curves, Layers
- Original Image Size: 3454 × 5179 pixels (17.9 MP); 11.5" x 17.3" @ 300 dpi
- Rights: Copyright 2012 by Fred Espenak. All Rights Reserved. See: Image Licensing.