M94 SPIRAL GALAY & OUTER RING

MMessier 94 (also known as NGC 4736) is a spiral galaxy in the constellation Canes Venatici. It was discovered by Pierre Méchain in 1781, and catalogued by Charles Messier two days later. Although some references describe M94 as a barred spiral galaxy, the "bar" structure appears to be more oval-shaped. The galaxy has two ring structures. M94 contains both an inner ring with a diameter of 70 arcseconds and an outer ring with a diameter of 600 arcseconds. These rings appear to form at resonance locations within the disk of the galaxy. The inner ring is the site of strong star formation activity and is sometimes referred to as a starburst ring. This star formation is fueled by gas that is dynamically driven into the ring by the inner oval-shaped bar-like structure.
designed by Lluís Romero Ventura
The Earth astrosirius@astrosirius.org

M94 SPIRAL GALAY & OUTER RING

Place: Ager-Lleida-Spain SQM: 20.8 Dates: Dec 2016 & Jan 2017 Details Telescope: GSO RC14 Truss Mount: ASA DDM85 Camera: Moravian G2-8300 Focuser: Feather Touch 3 Kit Boss II Flattener: TS 2.5 Filters: Astrodon LRGB Gen2 I-Series True-Balance Exposure: L: 39x900 sec bin1 L: 2x1800 sec binz RGB: 19:22:28x600 sec bin1 RGB: 24:19:18X900 sec bin1 RGB: 4:4:4x900 sec bin1 Processing: Pixinsight & Photoshop CC Software: MaximDL, Sequence,Autoslew Control Remote: Talon6

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