Cayrel's Star is a star that can be located in the constellation of Cetus. The star can not be seen by the naked eye, you need a telescope to see it. It is calculated at being 13.000 Billion Years old. This information comes from ExoPlanet.
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 .
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 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.
|Traditional/Proper Name||Cayrel's Star|
|Age||13.00 Billion Years Old|
|Visual / Apparent Magnitude||11.70|
|Naked Eye Visible||Requires a 4.5 - 6 Inch Telescope - Ref: Wiki|
|Right Ascension (R.A.)||01h 29m 30.31|
|Declination (Dec.)||-16 d 08'5.51|
|Distance from the Sun / Earth||0.00 Light Years|
The map was generated using Night Vision, an awesome free application by Brian Simpson.
|vivej||Saturday, 22nd July 2017 7:44:44 PM|
|how could we see Cayrel's Star if light can be seen only if it's redirected by something?|