Its story

HIP 21331 has a visual magnitude of about 9.50: it is a telescope star and remains difficult or invisible to the naked eye even in good conditions.

Equatorial coordinates for HIP 21331: right ascension 4h 34m 42s, declination −76° 6′ 43″ (J2000), in the region of the Mensa constellation (IAU figure Men).

HIP 21331. It appears in classical and modern catalogs as HIP 21331, HD 29947, Gaia DR3 4628046583946758144. In the SkyKeepsake Mensa (Men) browse hub it sits with other stars of the same IAU figure.