Ross 154

[11] In 1926, he added it to his second list of stars showing a measurable proper motion after comparing its position with photographic plates taken earlier by fellow American astronomer E. E.

[12] A preliminary parallax value of 0.362 ± 0.006 arcseconds was determined in 1937 by Walter O'Connell using photographic plates from the Yale telescope in Johannesburg, South Africa.

[7] A stellar classification of M3.5V[2] makes this a red dwarf star that is generating energy through the nuclear fusion of hydrogen at its core.

[18] Based on the relatively high projected rotation, this is probably a young star with an estimated age of less than a billion years.

Such debris disks are rare among M-type star systems older than about 10 million years, having been primarily cleared away by drag from the stellar wind.

[23] Based on its low velocity relative to the Sun, this is believed to be a young disk (Population I) star.

A broadband optical light curve for V1216 Sagittarii, plotted from Kepler data [ 14 ]