--- name: Plaskett star constellation: Mon created_by: 8mag created_date: 2022-01-21 17:00:00 updated_by: skybber updated_date: 2022-02-06 10:13:55.332535 --- a spectral binary star of sixth magnitude discovered in 1922 by Canadian astronomer and director of the Victoria Observatory John Stanley Plaskett. It is the most massive binary star known.