HD 41742/41700 [SEP] constellation
HD 41742/41700
HD 41742/41700 is a star system that lies approximately 87 light-years away in the constellation of Puppis. The system consists of two bright stars where the primary is orbited by two fainter stars, making it a quadruple with an unequal hierarchy.
Component discovery.
HD 41742 B was discovered early on in the history of visual binaries, due to the brightness of the primary. The earliest measurement in the Washington Double Star Catalog (WDS) dates to 1837 and was made by William Herschel, stating a
, HD 41700 has a somewhat large lithium content; because lithium is used up by a star at an approximately constant rate over its lifetime, this can be used to estimate a star's age. For HD 41700, its lithium abundance indicates an age of 200 ± 50 million years.
Some young star systems remain loosely associated with other stars that formed in the same molecular cloud as they move through space, known as a moving group. The HD 41742/41700 system has space velocities of (UVW) = −37.8, −10.4