Algol is a small, rapidly orbiting red dwarf star in the Per constellation, classified as a V2 star. Its apparent brightness is 2.09 and its visual magnitude is relatively low, making it subtle to observers on earth. This star is located approximately 43

Algol’s distinctive visibility stems from its exceptionally rapid orbital speed. Stars that move so swiftly are typically observed as “trailing stars” - a bright point of light that appears to move slowly across the sky, like a pointer or a trail. Sirius, often called “The Dog Star”, is a prominent and much brighter example of a trailing star; it is the brightest star in the night sky. Algol’s speed, at approximately 1 astronomical unit per year, puts it at the closest distance to the Sun, requiring careful observation for astronomers.

This comparatively dim star holds a special appeal for those who contemplate its significance in the vastness of space. Its prominence makes it a valuable and relatively easy object for planetary observations, especially to those seeking a seemingly stable and recognizable focal point for a celestial landscape. A quiet observational moment, dedicated to a subtle presence in the night sky, a singular point of brightness.

How to see it

Algol has a visual magnitude of about 2.09: under a reasonably dark sky it is typically reachable with the unaided eye.

Sky position

Equatorial coordinates for Algol: right ascension 3h 8m 10s, declination +40° 57′ 20″ (J2000), in the region of the Perseus constellation (IAU figure Per).

Perseus — Explore by constellation

Catalog context

Algol. It appears in classical and modern catalogs as Bayer/Flamsteed designation 26Bet Per, HIP 14576, HD 19356, Gaia DR3 HYG-HIP-14576. In the SkyKeepsake Perseus (Per) browse hub it sits with other stars of the same IAU figure.

Catalog identifiers

Gaia

Gaia DR3 HYG-HIP-14576

HIP

14576

HD

19356

gaia_dr3

HYG-HIP-14576

Bayer / Flamsteed

26Bet Per

Also known as

• 26Bet Per
• Gaia DR3 TOP 5M HYG-HIP-14576
• HD 19356
• HIP 14576
• HYG-HIP-14576

Observed properties

Visual magnitude

2.09