International Star Naming
The most popular free star naming service
Menu Name a star Star directory Astronomy NFTs
Menu Menu
Stars Name a star
Login  Login
Terms & Conditions
Privacy policy
Contact form
Zodiac: Sagittarius
Nov 23 - Dec 21
Read more about Sagittarius.
Do you want to buy a star? Check our tutorial before you spend money!

Sirius (α Canis Majoris)

Sirius (α Canis Majoris) is a white A-type star (A0mA1 Va + DA2) in the constellation of Big Dog.
With a visual apparent magnitude of -1.46, Sirius is the brightest star in the night sky and almost twice as bright as the next brightest star . Only 8.6 light years away from earth, Sirius is also one of the closest stars in our neighborhood. It's age of around 240 million years make it a youngster compared to the five billion years of our own Sun.
Sirius is the main star of Big Dog, the Hunting Dogs. Due to its brightness, it obtained a significant role in many ancient cultures.
Right ascension
6h 45m 9.25s (101.28854°)
The magnitude (brightness) is measured on a logarithmic scale. Small numbers mean bright stars: A star with a brightness of 1 mag is 100 times brighter that an star with 6 mag.
-1.19 mag
The distance is measured in light years (LY). A light year is the distance, that light travels within one year. 1 LJ is equal to about 5,878,630,000,000 miles.
99 ly
Spectral type
A0mA1 Va + DA2
Color index
Every star belongs to a constellation, and 12 of those constellations are part of the zodiac.
Canis Major (Big Dog)
Sirius, a binary star, consisting of the main sequence star Sirius A and the faint white dwarf companion Sirius B.
Image credit: NASA, ESA and G. Bacon (STScI)
While we take great care in compiling the data of all astronomical objects in our database, errors can never be ruled out completely. Therefore, no warranty is taken over for the correctness of the data, the descriptions, or the associated images. Staracle cannot be held liable for any damage, direct or indirect, that may result from incorrect data.
Your privacy is important to us! Clicking on the above button loads a Google Star Map from the Google servers and may place Cookies on your device. Please read our Privacy policy.
This star is reserved and cannot be named.
ImprintTerms & ConditionsPrivacy policyRevocation RightImage copyrightContact formPress and media