Gamma¹ Caeli, Latinized from γ¹ Caeli, is a double star in the constellation Caelum. It consists of a K-type giant, and a G-type subgiant.

Properties

Component A

Gamma¹ Caeli A has an

apparent magnitude Apparent magnitude () is a measure of the brightness of a star or other astronomical object observed from Earth. An object's apparent magnitude depends on its intrinsic luminosity, its distance from Earth, and any extinction of the object's li ...

of 4.57, which makes it barely visible to the

naked eye Naked eye, also called bare eye or unaided eye, is the practice of engaging in visual perception unaided by a magnifying, light-collecting optical instrument, such as a telescope or microscope, or eye protection. Vision corrected to normal ...

. According to

parallax Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight and is measured by the angle or semi-angle of inclination between those two lines. Due to foreshortening, nearby objects ...

, the star is located 185 light years away. Gamma¹ Caeli A has a similar mass to the

Sun The Sun is the star at the center of the Solar System. It is a nearly perfect ball of hot plasma, heated to incandescence by nuclear fusion reactions in its core. The Sun radiates this energy mainly as light, ultraviolet, and infrared radi ...

, but expanded to 14.3 times the Sun's girth. It radiates at 69.9 times the

Sun's luminosity The solar luminosity (), is a unit of radiant flux (power emitted in the form of photons) conventionally used by astronomers to measure the luminosity of stars, galaxies and other celestial objects in terms of the output of the Sun. One nominal ...

from its swollen photosphere at an effective temperature of 4,411 K.

Component B

Gamma¹ Caeli B has an apparent magnitude of 8.07, which makes it visible only in binoculars, and is located at a similar distance to Component A. It has 91% of the

Sun's mass The solar mass () is a standard unit of mass in astronomy, equal to approximately . It is often used to indicate the masses of other stars, as well as stellar clusters, nebulae, galaxies and black holes. It is approximately equal to the mass of ...

, and is metal poor, with 79% the abundance of heavy metals compared to the Sun.

References

{{DEFAULTSORT:Gamma1 Caeli Caeli, Gamma1 Caelum Binary stars K-type giants 032831 023595 1652 Durchmusterung objects G-type subgiants