Tag Archive for 'Quadruple system'

An artist’s impression of the UPM J1040-3551 system against the backdrop of the Milky Way as observed by ESA’s Gaia satellite; on the left, UPM J1040-3551 Aa & Ab appears as a distant bright orange dot, with an inset revealing these two M-type stars in orbit; on the right, in the foreground, a pair of cold brown dwarfs -- UPM J1040-3551 Ba & Bb -- orbit each other for a period of decades while collectively circling UPM J1040-3551 Aab in a vast orbit that takes over 100,000 years to complete. Image credit: Jiaxin Zhong / Zenghua Zhang.

Astronomers Discover Extremely Rare Hierarchical Quadruple System

Aug 19, 2025 by News Staff

Named UPM J1040-3551 AabBab, the newly-discovered quadruple star system consists of a pair of cold brown dwarfs and a pair of young red dwarfs. An artist’s...

Astronomers thought HIP 81208 was a system consisting of a massive central star (A, the central bright spot), a brown dwarf (B) circling around it, and a low-mass star (C) orbiting further away. However, Chomez et al. revealed an object (Cb), approximately 15 times more massive than Jupiter, orbiting around the smaller of the two stars (C). Image credit: ESO / Chomez et al.

Astronomers Directly Image Rare Hierarchical Quadruple System

Sep 19, 2023 by Natali Anderson

HIP 81208 is the first binary stellar system with substellar companions around each stellar component ever found by direct imaging. Astronomers thought...