Acamar – a star remarkably identifiable as a member of the constellation For, located in the Southern hemisphere. It occupies the NGC 999 constellation, characterized by its slightly variable but stable luminosity. This star measures approximately 3.228 i

The recognizable nature of Acamar stems from its relatively consistent brightness, particularly compared to the brighter stars in its region. Due to its apparent position in a relatively smooth area of the sky, this has led to its frequent observation for historical and observational study throughout the age of astronomy. It's often viewed as a foundational, reliable star for astronomers who sought to establish a framework for understanding spatial variations in star brightness. It presents a familiar, stable point of reference for cataloging and analysis, a steadfast anchor within the seemingly vast expanse of the heavens.

How to see it

Acamar has a visual magnitude of about 3.23: under a reasonably dark sky it is typically reachable with the unaided eye.

Sky position

Equatorial coordinates for Acamar: right ascension 2h 58m 16s, declination −40° 18′ 16″ (J2000), on the celestial sphere.

Catalog context

Acamar. It appears in classical and modern catalogs as Bayer/Flamsteed designation The1Eri, HIP 13847, HD 18622, Gaia DR3 5044368071870093312.

Catalog identifiers

Gaia

Gaia DR3 5044368071870093312

HIP

13847

HD

18622

gaia_dr3

5044368071870093312

Bayer / Flamsteed

The1Eri

Also known as

• Gaia DR3 TOP 5M 5044368071870093312
• HD 18622
• HIP 13847
• The1Eri

Observed properties

Visual magnitude

3.23