Editing Upsilon Andromedae (section)

=== Upsilon Andromedae B ===
The red dwarf companion has a spectral type M4.5V and is located at a [[projected separation]] of 750 AU from the primary star. The true separation between the two stars is unknown because the displacement along the [[Line-of-sight propagation|line of sight]] between Earth and the Upsilon Andromedae stars is unknown, so this value is a minimum separation. Based upon its motion through space, this is a common proper motion companion to the primary. It was discovered in 2002 in data collected as part of the [[2MASS]].<ref name="lowrance">{{cite journal | last1=Lowrance | first1=Patrick J. | last2=Kirkpatrick | first2=J. Davy | last3=Beichman | first3=Charles A. | title=A Distant Stellar Companion in the υ Andromedae System | journal=The Astrophysical Journal Letters | volume=572 | issue=1 | pages=L79–L81 | date=2002 | doi=10.1086/341554 | bibcode=2002ApJ...572L..79L | arxiv=astro-ph/0205277 | s2cid=7111977 }}</ref> The star is less massive and far less luminous than the Sun, and its age seems to be consistent with that of the system.<ref name="poppenhaeger"/>