55 Andromedae (abbreviated 55 And) is the Flamsteed designation of a star located in the northern constellation of Andromeda. The designation follows the system introduced by John Flamsteed, wherein stars within a constellation are numbered in order of increasing right ascension. As a result, 55 Andromedae is identified in a number of astronomical catalogs under various identifiers, including entries in the Henry Draper Catalogue (HD), the Hipparcos Catalogue (HIP), and the Bright Star Catalogue (HR).
The star is visible to the naked eye under dark‑sky conditions, possessing an apparent visual magnitude near the threshold of unaided visual perception (approximately magnitude 5). Its spectral classification and precise astrophysical parameters (such as luminosity class, effective temperature, and distance) are recorded in professional astronomical databases, but the specific values vary among sources and require consultation of those catalogs for detailed information.
Because the star is part of a well‑documented cataloging system, it is referenced in scientific literature concerning stellar statistics, proper motion studies, and the mapping of the Andromeda constellation. No historically significant events, cultural myths, or alternative non‑astronomical meanings are associated with the designation 55 Andromedae.
