Its story

HIP 21688 has a visual magnitude of about 6.89: it usually needs binoculars or a small telescope, especially from light-polluted sites.

Equatorial coordinates for HIP 21688: right ascension 4h 39m 23s, declination −30° 27′ 24″ (J2000), in the region of the Caelum constellation (IAU figure Cae).

HIP 21688. It appears in classical and modern catalogs as HIP 21688, HD 29704, Gaia DR3 4878674414046032512. In the SkyKeepsake Caelum (Cae) browse hub it sits with other stars of the same IAU figure.