Rasalhague (55Alp Oph) — Hercules · Gaia DR3 HYG-HIP-86032

Rasalhague. A captivating star, designated in the catalog as Her, is part of the constellation known as Her. Located in the southern skies, Rasalhage is a visually prominent star with a magnitude of approximately 2.08 – a relatively bright and consistentl

Known for its distinctive, slightly elliptical shape and bright, yellowish hue, Rasalhague is frequently discernible as a prominent dot in the sky. It is remarkable for its clear position in the galactic center, easily tracked relative to surrounding stars. Its visibility doesn't hinge on any specific spectral characteristics – its light intensity remains stable across various wavelengths. Unlike many, its apparent brightness allows for relatively easy identification in numerous astronomical imaging projects and amateur star charts.

While technically a binary star system, Rasalhague is frequently considered a single, self-observing star. Given its position and brightness, and combined with other stars within the Her constellation, it is commonly sought-after by amateur astronomers and stargazers. In essence, the star represents a relatively reliable and relatively large distance. Its gentle, yet persistent glow makes it a subject of quiet interest throughout the celestial realm.

How to see it

Rasalhague has a visual magnitude of about 2.08: under a reasonably dark sky it is typically reachable with the unaided eye.

Sky position

Equatorial coordinates for Rasalhague: right ascension 17h 34m 56s, declination +12° 33′ 36″ (J2000), in the region of the Hercules constellation (IAU figure Her).

Hercules — Explore by constellation

Catalog context

Rasalhague. It appears in classical and modern catalogs as Bayer/Flamsteed designation 55Alp Oph, HIP 86032, HD 159561, Gaia DR3 HYG-HIP-86032. In the SkyKeepsake Hercules (Her) browse hub it sits with other stars of the same IAU figure.

Catalog identifiers

Gaia: Gaia DR3 HYG-HIP-86032
HIP: 86032
HD: 159561
gaia_dr3: HYG-HIP-86032
Bayer / Flamsteed: 55Alp Oph

Also known as

Observed properties

Visual magnitude: 2.08