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Astr111 Photography Projects, Fall 2005

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M74, Jeff Blaauw

M74

This is a picture of M74 which is a Spiral Galaxy. This Spiral Galaxy is located in the constellation Pisces. M74 was one of the very first "Spiral Nebulae" recognized. It was discovered by Pierre Méchain in the year 1780 near the end of September. When he discovered it he reported his findings to his friend Charles Messier, who determined the position of the Galaxy. After determining the position of the galaxy he included Pierre's finding in his October 18, 1780 catalog.

M74 is a Spiral Galaxy. It is considered one of the 14 "spiral or curvilinear nebulae" that were discovered before1850. In the image of M74 is red star clusters and blue star clusters. The red star clusters which are generally near the center of the galaxy and those are the older stars, while the blue stars which for the most part are near the spirals are newer stars.The scientific structure of M74 is very interesting, it has multiple arms in spiral formation and also has an extremely bright center compared to the rest of the galaxy. The distance of m74 is between 30 and 40 million light years. The estimated angular size of M74 is 305 arc seconds. In this image the linear size of M74 is 51,753.8 light years.

References:
SEDS, M74

Right Ascension (J2000) 01:36:42
Declination (J2000) +15:47:11
Filters used blue(B), green(V), red(R), and clear(C)
Exposure time per filter 1x300 seconds in (C), (VR), and (B)
Date observed

October 06, 2005 (C)
October 07, 2005 (VR)

October 11, 2005 (B)