J1250+0455AB an ultracool binary in a hierarchical triple system

Key Points

• J1250+0455AB is a stable ultracool dwarf binary system with an estimated orbital period of 156 years.
• Total mass is less than 0.2 M$_ ext{☉}$, with components exhibiting bolometric luminosities of -3.45 and -3.58.
• The binary system has a projected separation of 0.17 arcseconds, translating to 12.2 AU physically.
• Age estimation indicates the system is approximately 0.56 billion years, reflecting evolutionary models for low-mass stars.