December 14, 2021

BD+60 1417's system

An article published in “The Astrophysical Journal” reports the discovery of an object orbiting BD+60 1417, a young star a little smaller than the Sun, which could be a gas giant planet but also a small brown dwarf. Amateur astronomer Jörg Schümann spotted a moving object by examining images in the “Backyard Worlds: Planet 9” program that anyone can participate in. A team led by Jackie Faherty of the American Museum of Natural History used various telescopes to confirm the existence of the object, cataloged as CWISER J124332.12+600126.2 or simply W1243. Its mass was estimated between 10 and 20 times the planet Jupiter’s, around the border between planet and brown dwarf, estimated around 13 Jupiter masses. The object had escaped previous research probably because its distance from its star is about 1660 times that of the Earth from the Sun.