Special Stars: DENIS-P J020529.0-115925 (original) (raw)

This is an old triple system made of brown dwarfs. The existence of the third (C) isn't proofed without doubt yet, but very likely.
The would-be stars can't produce any more energy and now slowly glow out. The warmest (A) of them has a temperature of just 1800 kelvin.

Constellation: Cetus
Age: 1 - 10 billion years
Distance: 65 light-years
Radial velocity: 22 km/sek
Space between A and B: 10 AU
Space between B and C: 1.9 AU
Orbit period of B and C: 8 years

| DENIS-P J020529.0-115925 A Spectral class: L5.5 Visual magnitude: 17.3 Mass: circa 38 * Jupiter | | DENIS-P J020529.0-115925 B Spectral class: L8 Visual magnitude: 18.3 Mass: circa 34 * Jupiter | | DENIS-P J020529.0-115925 C Spectral class: T0 Visual magnitude: 18.8 Mass: circa 33 * Jupiter | | ------------------------------------------------------------------------------------------------------------ | | ---------------------------------------------------------------------------------------------------------- | | ---------------------------------------------------------------------------------------------------------- |

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Somewhere ia a stellar-poor area of the Milky Way lies the dark triplet.
Photo: ESO Online Digitized Sky Survey