Sirius is the brightest star in the night sky. Its name is derived from the Greek word Σείριος. The star is designated α Canis Majoris, Latinized to Alpha Canis Majoris, and abbreviated Alpha CMa or α CMa. With a visual apparent magnitude of −1.46, Sirius is almost twice as bright as Canopus, the next brightest star.
Information
Distance to Earth :- 8.611 light years
Surface temperature :- 9,940 K
Magnitude :- -1.46
Radius :- 1.19 million km (1.711 R☉)
Constellation :- Canis Major
Coordinates :- RA 6h 45m 9s | Dec -16° 42′ 58″
Star system :- Solar System
Star age
The more massive of these, Sirius B, consumed its resources and became a red giant before shedding its outer layers and collapsing into its current state as a white dwarf around 120 million years ago.
Sirius.
Composition
Sirius B is primarily made out of a carbon-oxygen mixture that was generated by helium fusion in the progenitor star. The outer atmosphere is now almost pure hydrogen, the element with the lowest mass.
Density
3.0 x 106 grams per cubic cm
Density is the total mass divided by the volume. Sirius B's density is 3.0 x 106 grams per cubic cm, or 3.0 x 109 kg per cubic meter.
Weight
Sirius B's powerful gravitational field is 350,000 times greater than Earth's, meaning that a 68 kilogram person would weigh 25 million kilograms standing on its surface.
About the Object.
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