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A star name with a lower-case letter.
Also known as: Planet letter suffix, 51 Pegasi b style designation
The designation of a planet orbiting another star, formed by adding a lower-case letter to the star's own designation.
Begins at b rather than a, the letter a being reserved for the star itself, and letters are assigned in order of discovery rather than distance from the star.
Contexts: History
Distinguishes a planet from a stellar component by letter case alone, a lower-case letter meaning a planet and a capital meaning a star.
Contexts: History
An existing star designation with a lower-case letter appended, beginning at b.