Its story

HIP 21538 has a visual magnitude of about 7.44: it usually needs binoculars or a small telescope, especially from light-polluted sites.

Equatorial coordinates for HIP 21538: right ascension 4h 37m 27s, declination +43° 1′ 15″ (J2000), in the region of the Auriga constellation (IAU figure Aur).

HIP 21538. It appears in classical and modern catalogs as HIP 21538, HD 29156, Gaia DR3 204336784257202048. In the SkyKeepsake Auriga (Aur) browse hub it sits with other stars of the same IAU figure.