Pi4 Orionis
Encyclopedia
Pi4 Orionis is a spectroscopic binary star
in the constellation
Orion
. It is about 1,300 light years away and is one of the most luminous stars known. It is one of a series of stars that share the Bayer designation
Pi Orionis
.
Star
A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...
in the constellation
Constellation
In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....
Orion
Orion (constellation)
Orion, often referred to as The Hunter, is a prominent constellation located on the celestial equator and visible throughout the world. It is one of the most conspicuous, and most recognizable constellations in the night sky...
. It is about 1,300 light years away and is one of the most luminous stars known. It is one of a series of stars that share the Bayer designation
Bayer designation
A Bayer designation is a stellar designation in which a specific star is identified by a Greek letter, followed by the genitive form of its parent constellation's Latin name...
Pi Orionis
Pi Orionis
Pi Orionis is a group of fairly widely scattered stars in the constellation Orion that constitute Orion's shield.They form an exception to the general rule that stars that share the same Bayer designation are close together: π1 is nearly 9° north of π6 .* π1 Ori * π2 Ori * π3 Ori...
.