Leo 1 Dwarf Galaxy in Leo

Detected in 1950 by Albert George Wilson on photographs with the 48-inch-Schmidt camera at Mount Palomar,Leo 1 was identified as beeing a Dwarf Galaxy,belonging to our Local Group of Galaxies.

It is very difficult to observe,because of the 1.st magnitude star alpha Leonis (Regulus) ,located only 12 arcminutes away.

Some 820.000 light-years away from us,this dSph-typed measures an apparent size of 9,8 × 7,4arcmin,shining with an visual brightness of 11.5mag.


position (epoch 2000):

Ra.: 10h 08m 27,4s
Decl.: 12° 18′ 27″


image data:

LRGB(460-140-140-140 min),a total of 14.7 hours
north is up
80cm f/7 AstroOptik Keller corrected cassegrain FLI Proline 16803 Astrodon LRGB Gen-II filters
Prompt 7 CTIO/UNC Chile,remote controlled
image processing: Bernd Flach-Wilken


Nearly the complete FOV (squared 22.5arcmin.) of the CCD´s image filed is filled with stars tf the Dwarf Galaxy Leo 1:

HERE you can see the fully resolved picture

the spikes an streaks at the bottom are reflections from the neary star 1.st mag.Regulus (alpha Leonis)


Last modified on Thursday, 28 January 2021 17:05

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