15 Sagitta B
Mean Distance from Primary: 14 AU
Estimated Mean Temp: 72 K
Temp. from Internal Heating: 1647.34 K
Mean Angular Star Size: 0.041 deg.
15 Sagitta B is a massive brown dwarf in orbit of 15 Sagitta A in the 15 Sagitta system. It may be too massive to have formed like a planet from the circumstellar disk of gas and dust that enveloped 15 Sge when it was less than a hundred million years old. Rather, it may have developed from a fragment of the molecular cloud that was condensing into 15 Sge itself at an earlier stage of stellar formation.