Its story

HIP 21503 has a visual magnitude of about 9.28: it is a telescope star and remains difficult or invisible to the naked eye even in good conditions.

Equatorial coordinates for HIP 21503: right ascension 4h 37m 7s, declination +22° 17′ 3″ (J2000), in the region of the Taurus constellation (IAU figure Tau).

HIP 21503. It appears in classical and modern catalogs as HIP 21503, HD 284540, Gaia DR3 144923161619697152. In the SkyKeepsake Taurus (Tau) browse hub it sits with other stars of the same IAU figure.