The atmospheric characterization of resolved brown dwarf companions are unique observational treasures as they help tell a story of giant planet formation and evolution far from a given star (>>10 AU). Brown dwarfs have better quality data than exoplanets and are ideal objects to test and verify models and atmospheric retrieval techniques. More yet, retrieving the bulk properties of brown dwarf atmospheres in comparison to their host stars can provide insights into formation mechanisms. The recently discovered, L6-L8 planetary-mass companion, BD+60 1417 B (15± 5 M_Jup), lies at a separation of >1000 AU from its K0 host star and has an age of 50 -150 Myr. The companion is one of the reddest known L dwarfs. I aim to use the atmospheric retrieval code, Brewster, to explore the cloud properties for this source as well as robustly decouple temperature, gravity, and composition to derive gas abundances and ultimately estimate bulk composition ratios such as C/O to directly compare to the composition of the primary. I will present initial findings for this work to probe possible formation routes (e.g. core accretion, gravitational or turbulent disk fragmentation) for the companion

{"references": ["Jacqueline K. Faherty et al 2021 ApJ 923 48"]}