Lalande 21185

Lalande 21185 is the largest red dwarf ever discovered with a diameter of 547,060 kilometres (339,930 mi), It is located in the constellation of Ursa Major. Although relatively close by, it's visual magnitude is only 7 in visible light and thus is too dim to see with the naked eye. The star is visible through a small telescope.

At about 8.31 light-years (2.55 parsecs) away this star is the fifth closest stellar system to the Sun; only the Alpha Centauri system, Barnard's Star, WISE 1049-5319 and Wolf 359 are closer. Because of its proximity it is a frequent subject for astronomical surveys and other research. It is known by other designations, such as BD+36 2147, Gliese 411, and HD 95735.

Lalande 21185 Media

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  IAU Ursa Major chart, also known as the Great Bear.

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  Distances of the nearest stars from 20,000 years ago until 80,000 years in the future

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  The position of Lalande 21185 on a radar map among all stellar objects or stellar systems within 9 light years (ly) from the map's center, the Sun (Sol). The diamond-shapes are their positions entered according to right ascension in hours angle (indicated at the edge of the map's reference disc), and according to their declination.

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  An X-ray light curve for a flare on NSV 18593, adapted from Pye et al. (2015)