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 of 4.57, which makes it barely visible to the naked eye. 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, but expanded to 14.3 times the Sun's girth. It radiates at 69.9 times the Sun's luminosity from its swollen

photosphere The photosphere is a star's outer shell from which light is radiated. The term itself is derived from Ancient Greek roots, φῶς, φωτός/''phos, photos'' meaning "light" and σφαῖρα/''sphaira'' meaning "sphere", in reference to it ...

at an

effective temperature The effective temperature of a body such as a star or planet is the temperature of a black body that would emit the same total amount of electromagnetic radiation. Effective temperature is often used as an estimate of a body's surface 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, 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 Events January–March * January 8 – Michiel de Ruyter marries the widow Anna van Gelder and plans retirement, but months later becomes a vice-commodore in the First Anglo-Dutch War. * February 4 – At Edinburgh, the parl ...

Durchmusterung objects G-type subgiants