Its story

HIP 81640 has a visual magnitude of about 7.69: it usually needs binoculars or a small telescope, especially from light-polluted sites.

Equatorial coordinates for HIP 81640: right ascension 16h 40m 38s, declination +70° 34′ 15″ (J2000), in the region of the Draco constellation (IAU figure Dra).

HIP 81640. It appears in classical and modern catalogs as HIP 81640, HD 151286, Gaia DR3 1650312119445493760. In the SkyKeepsake Draco (Dra) browse hub it sits with other stars of the same IAU figure.