Its story

HIP 21240 has a visual magnitude of about 8.64: it is a telescope star and remains difficult or invisible to the naked eye even in good conditions.

Equatorial coordinates for HIP 21240: right ascension 4h 33m 23s, declination +19° 48′ 49″ (J2000), in the region of the Taurus constellation (IAU figure Tau).

HIP 21240. It appears in classical and modern catalogs as HIP 21240, HD 284564, Gaia DR3 3410752040788795392. In the SkyKeepsake Taurus (Tau) browse hub it sits with other stars of the same IAU figure.