Its story

HIP 87639 has a visual magnitude of about 7.51: it usually needs binoculars or a small telescope, especially from light-polluted sites.

Equatorial coordinates for HIP 87639: right ascension 17h 54m 6s, declination +78° 40′ 47″ (J2000), in the region of the Ursa Minor constellation (IAU figure UMi).

HIP 87639. It appears in classical and modern catalogs as HIP 87639, HD 165309, Gaia DR3 1705442491455890176. In the SkyKeepsake Ursa Minor (UMi) browse hub it sits with other stars of the same IAU figure.