V4046 Sagittarii

Database links to V4046 Sagittarii

Double star V4046 Sagittarii
Observation dates equinox :  J2000.0 , epoch : J2000.0
AladinLite
Constellation	Sagittarius
Right ascension	18 h 14 m 10 s
declination	-32 ° 47 ′ 34 ″
Apparent brightness	10.5 mag
Astrometry
distance	approx. 240 ly (approx. 70 pc )
orbit
period	2.42 d
Individual data
Names	A; B.
Age	approx. 12 million
Other names and catalog entries
Cordoba Survey CD -32 ° 13906 Henry Draper Catalog HD 319139 [1] Tycho catalog TYC 7396-644-1 [2]

V4046 Sagittarii , or V4046 Sgr for short , is a spectroscopic binary star system in the constellation Sagittarius, about 240 light years away . The components belong to the spectral classes K5 and K7 and have almost identical masses of around 0.9 solar masses each; they are only a few solar radii apart. Their age is about 12 million years. In June 2009, a sub-millimeter array radio telescope was able to detect a protoplanetary disk surrounding the stars . This was the first discovery of such a disk in a binary star system and V4046 Sgr is the oldest star system so far in which such a disk has been detected.

Individual evidence

1. ↑ Radio Telescope Images Reveal Planet-Forming Disk Orbiting Twin Suns. Harvard-Smithsonian Center for Astrophysics , June 10, 2009, accessed June 14, 2009 .