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Taken 1-Jan-20
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Dimensions748 x 577
Original file size281 KB
Image typeJPEG
Color spacesRGB
Date modified1-Jan-20 22:38
M31_V1 in the Andromeda Galaxy

M31_V1 in the Andromeda Galaxy

This is an image of the Cepheid variable that Edwin Hubble used to obtain the first distance estimate to the Andromeda galaxy. Magnitude range is 18.5 to 19.8 with a period of 31.4 days.
Stack of 30 exposures at 15s, f/5 at 1530 mm focal length