- Source: Lambda1 Sculptoris
Lambda1 Sculptoris, Latinised from λ1 Sculptoris, is a double star system in the southern constellation of Sculptor. It is close to the lower limit of visibility to the naked eye, with a combined apparent visual magnitude of +6.05. Based upon an annual parallax shift of 6.89 mas as measured from Earth, it is located roughly 470 light-years from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.026 due to interstellar dust.
The brighter star, component A, has a visual magnitude of 6.6, while the secondary, component B, is magnitude 7.0. As of 2000, the pair had an angular separation of 0.737 arcsecond along a position angle of 14.0°. Component A is a blue-white-hued B-type main-sequence star with a stellar classification of B9.5 V. It has 2.8 times the mass of the Sun and radiates 94 times the solar luminosity from its photosphere at an effective temperature of 10,351 K. The mass ratio is 0.609, meaning the secondary is only 60.9% as massive as the primary.
