Its story

HIP 21991 has a visual magnitude of about 9.67: it is a telescope star and remains difficult or invisible to the naked eye even in good conditions.

Equatorial coordinates for HIP 21991: right ascension 4h 43m 36s, declination −15° 48′ 21″ (J2000), in the region of the Lepus constellation (IAU figure Lep).

HIP 21991. It appears in classical and modern catalogs as HIP 21991, Gaia DR3 3173006531300708352. In the SkyKeepsake Lepus (Lep) browse hub it sits with other stars of the same IAU figure.