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Canis Canis, one of the 88 constellations in the whole sky, is located in the southern sky, one of the 48 constellations defined by Claudius Ptolemy. Sirius Canis the brightest star in the night sky and a fixed point of the winter triangle.

Sirius is the main star of Canis Canis, the first bright star behind the sun from the earth, and one of the closest stars to the sun (about 8.6 light years). The ancient Greeks believed that July 22nd to August 23rd was the dog days. This star rises with the sun, so it is also called "Dog Star".

Extended data:

Observation characteristics

Canis major covers an area of about 380 square degrees. There are 122 stars in the constellation whose visual magnitude is brighter than 6, among which 18 stars are brighter than 4. Looking southwest from Orion, it is Alpha Canis, also known as Sirius in ancient China, with an apparent magnitude of-1.47, etc. 8.6 light years away. There are 18 stars brighter than 4 in the constellation.

Deep sky object

There are no bright deep space objects in Canis Canis. The only messier objects in this constellation is M4 1(NGC 2287), which is an open cluster with a magnitude of 4.6 and located at 4 degrees south of Sirius. The Canis Canis dwarf galaxy was discovered on June 5438+065438+ 10, 2003. It runs in Canis Canis and surrounds the Milky Way.

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