Its story

HIP 21138 has a visual magnitude of about 10.50: it is a telescope star and remains difficult or invisible to the naked eye even in good conditions.

Equatorial coordinates for HIP 21138: right ascension 4h 31m 53s, declination +15° 29′ 58″ (J2000), in the region of the Taurus constellation (IAU figure Tau).

HIP 21138. It appears in classical and modern catalogs as HIP 21138, HD 285876, Gaia DR3 3312564037520033792. In the SkyKeepsake Taurus (Tau) browse hub it sits with other stars of the same IAU figure.