Cayrel's Star is a star that can be located in the constellation of Cetus. It is calculated at being 13.000 Billion Years old. This information comes from ExoPlanet.
Location of Cayrel's Star
The location of the star in the galaxy is determined by the Right Ascension (R.A.) and Declination (Dec.), these are equivalent to the Longitude and Latitude on the Earth. The Right Ascension is how far expressed in time (hh:mm:ss) the star is along the celestial equator. If the R.A. is positive then its eastwards. The Declination is how far north or south the star is compared to the celestial equator and is expressed in degrees. For Cayrel's Star, the location is 01h 29m 30.31 and -16 d 08'5.51 .
Physical Properties (Age, Radius) of Cayrel's Star
The star's metallicity is -3.000000, this value is the fractional amount of the star that is not Hydrogen (X) or Helium (Y). An older star would have a high metallicity whereas a new star would have a lower one.
The star is believed to be about 13.00 Billion years old. To put in context, the Sun is believed to be about five billion years old and the Universe is about 13.8 billion years old.
Cayrel's Star Apparent and Absolute Magnitudes
Cayrel's Star has an apparent magnitude of 11.70 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. Magnitude, whether it be apparent/visual or absolute magnitude is measured by a number, the smaller the number, the brighter the Star is. Our own Sun is the brightest star and therefore has the lowest of all magnitudes, -26.74. A faint star will have a high number.