Procyon A

By: Prateek Kasliwal

Words you may not know

Kelvin (K)- Kelvin is a temperature scale used a lot in astronomy. You probably know Celsius and Fahrenheit. Then why do we have to use another scale? Temperatures in space are often much colder or hotter than on Earth. Stars can have a temperature of a thousand degrees or more. The Kelvin scale is good to use for really hot and cold places in space. There aren't any negative numbers in the scale which makes it good when using cold temperatures.

Luminosity- is the total amount of energy emitted by a star, galaxy or astronomical object per unit time.

Absolute Magnitude- the magnitude (brightness) of a celestial object as it would be seen at a standard distance of 10 parsecs. One parsec is equal too 3.26 light years.

Apparent Magnitude- the magnitude of a celestial object as it is actually measured from Earth.

Solar Mass- it is the mass of the sun used as a unit of mass.

Gyr- it is an abbreviation for gigayear (i.e 109 years or a billion years)

Big image


The name of the star is Procyon A. The name Procyon comes from a Greek word meaning "before the dog". It is also the name of the genus that raccoon's belong to. The star is often referred to as the "Little Dog Star" because it comes into the sky shortly before Sirius (Dog Star), which is the brightest star in the sky.


Temperature: 6530 K


Big image


Luminosity: 6.93

Absolute Magnitude

Absolute Magnitude: 2.68

Apparent Magnitude

Apparent Magnitude: 0.4


Mass: 1.42 solar masses
Big image

Distance from Earth

11.4 light years

Spectral Classification


Age and Stellar Evolution Stage

Age: 1.7 gyr

Evolution Stage: Procyon A is a main sequence star just beginning its evolution off the main sequence and is often designated as belonging to evolutionary class IV-V to indicate its borderline status between dwarf and sub giant stages.

Big image

Fun Facts

  • Eight brightest star in the night sky
  • Procyon A is actually a double star consisting of Procyon A and a tiny, white dwarf Procyon B.
  • The closet star to Procyon A is Luyten's Star.

Recap on Procyon A

Procyon A


  • Spectral Type
  • Evolution Stage
  • Age
  • Both fun facts

  • Why Kelvin scale is used and definiton

  • Pictures

  • Absolute Magnitude
  • Apparent Magnitude
  • Luminosity
  • Distance from Earth
  • Temperature