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MACHO-LMC-5

MACHO-LMC-5 is a very small red dwarf in our galaxy, STAR-0516-7029 however is a blue star in the Large Magellanic Cloud. In the years 1993 - 1994 the smaller passed in front of the visual equally bright, but much more luminous blue one - a microlensing event. By that the brightness of the blue one was multiplied. And as a result in 2004 for the first time the mass of a single star (the red one) beyond the Sun could be measured directly with the help of the Hubble Telescope.

Constellation: Dorado
Distance: 1800 light-years
Spectral class: M4-5
Mass: 0.097 * Sun

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02/08/2007

    MACHO-LMC-5 and STAR-0516-7029
MACHO-LMC-5 (red) and STAR-0516-7029 (blue)
Photo: NASA, ESA and D. Bennett (University of Notre Dame)

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