Star Constellation Facts: Corvus

Corvus, the Crow, is a small constellation in the southern celestial sky, best known for its distinctive four-star pattern and the spectacular Antennae Galaxies. Although none of its stars is exceptionally bright, its compact quadrilateral makes it surprisingly easy to recognize.

Covering 184 square degrees, Corvus ranks 70th among the 88 modern constellations. Its name means “crow” or “raven” in Latin, and its mythology connects it with the neighboring constellations of Crater (the Cup) and Hydra (the Water Snake).

Where and When to Find Corvus

Corvus is best seen during Northern Hemisphere spring, particularly in April and May. It lies south of Virgo, perched on the back of the much larger constellation Hydra. One of the easiest ways to find it is to locate Spica, Virgo’s bright blue-white star, then look southwest for a compact, slightly irregular quadrilateral. The four stars forming this recognizable pattern are Gienah (Gamma Corvi), Kraz (Beta Corvi), Algorab (Delta Corvi), and Minkar (Epsilon Corvi).

Corvus is visible from much of the Northern Hemisphere, although it remains relatively low above the southern horizon at higher northern latitudes. Observers farther south enjoy a better view.

Mythology — Apollo’s Disobedient Crow

In Greek mythology, Corvus represents a crow sent by the god Apollo to fetch water in a cup. Instead of returning promptly, the bird stopped beside a fig tree and waited for its fruit to ripen. After eating the figs, it captured a water snake and brought it back as an excuse, claiming the serpent had prevented it from reaching the spring. Apollo saw through the deception and punished the crow by placing it in the heavens alongside the cup and the snake. These three figures survive as the neighboring constellations Corvus, Crater, and Hydra. In one version of the story, the crow was also condemned to eternal thirst, explaining its harsh, rasping call.

Notable Stars in Corvus

• Gienah (Gamma Corvi) is the constellation’s brightest star, shining at magnitude +2.6 from approximately 154 light-years away. It is a hot, blue-white giant star, and its name comes from an Arabic expression referring to the crow’s wing.
• Kraz (Beta Corvi) is the second-brightest star, with a magnitude of approximately +2.7. Located around 140 light-years away, it is an evolved yellow giant substantially larger and more luminous than the Sun.
• Algorab (Delta Corvi) shines at magnitude +3.0 from approximately 87 light-years away. Its primary component is a hot, blue-white star, and a much fainter companion can be seen with suitable telescopes.
• Minkar (Epsilon Corvi) is an orange giant approximately 300 light-years away, with an apparent magnitude of +3.0. It marks another corner of the Crow’s quadrilateral.
• Alchiba (Alpha Corvi) is fainter than the four stars above, despite its Alpha designation. At around fourth magnitude, it lies outside the main quadrilateral and helps complete the traditional outline of the bird.

Another interesting star is Eta Corvi, a Sun-like main-sequence star surrounded by belts of dusty debris. Astronomers study this material to understand the processes that occur around planetary systems.

Notable Deep-Sky Objects

Corvus contains no Messier objects, but it does offer several interesting targets for telescope observers.

Antennae Galaxies (NGC 4038 and NGC 4039)

The Antennae Galaxies are among the most spectacular examples of interacting galaxies in the nearby universe. Located roughly 60 million light-years away, they consist of two spiral galaxies undergoing a prolonged gravitational collision.

Their interaction has distorted both galaxies, producing enormous tidal tails of stars, gas, and dust that resemble an insect’s antennae. These extended tails are most clearly seen in wide-field photographs.

Within the galaxies, colliding clouds of gas have triggered intense star formation. Hubble images reveal brilliant blue star clusters, pinkish star-forming regions, and dark dust lanes crossing the interacting galaxies.

The encounter has been unfolding over hundreds of millions of years and will eventually leave the two galaxies merged into a single larger system.

Although the Antennae Galaxies can be detected with larger amateur telescopes under favorable conditions, the colorful detail familiar from Hubble photographs requires long exposures and sophisticated instruments.

NGC 4027 — An Unbalanced Spiral Galaxy

NGC 4027 is a barred spiral galaxy distinguished by its unusually asymmetric appearance.

One of its spiral arms extends much farther than the other, possibly because of past gravitational interactions with another galaxy. It is a faint target requiring a telescope and dark skies, but its unusual shape makes it an interesting object for astrophotography.

NGC 4361 — A Planetary Nebula

NGC 4361 is a planetary nebula formed when an aging star expelled its outer layers into space. Unlike the familiar ring-shaped appearance of some planetary nebulae, NGC 4361 has a more complex structure, with faint extensions surrounding a brighter central region. Its hot central star illuminates the expanding gas, producing the glowing nebula visible in astronomical photographs. The object is small and faint, but observers with moderate to large telescopes may be able to detect its diffuse glow under dark skies.

Observing Corvus

For naked-eye observers, the main attraction is the compact quadrilateral formed by Gienah, Kraz, Algorab, and Minkar. Once you recognize this pattern, it becomes a useful landmark below Virgo. Binoculars can help identify the surrounding stars, while larger telescopes open the possibility of observing NGC 4361 and the distant Antennae Galaxies.

Despite its modest size, Corvus combines an easily recognized star pattern, memorable mythology, and one of the most dramatic galactic collisions visible in the universe.