Basics of Photometry and Magnitudes

[piareround]

http://www.exoplanet.eu/catalog-all.php?&mode=0&more=yes". On one of the this it has for the for each exoplanet, in the list it gives the information about the parent star's properties especially its phototemetry. Specifically it lists star's the V-order, I-order, H-order, J-order, and K-order magnitude; however, it does not list the star's absolute magnitude, or luminosity.

Is their a way to calculate the absolute or apparent magnitude of the parent star from its photometric magnitudes? If so do how?

 

[lippyka]

Unfortunately, it is not possible to calculate the absolute or apparent magnitude of a star based solely on its photometric magnitudes. Photometric magnitudes measure the amount of light that is received from a star in different bands of the electromagnetic spectrum, but they do not tell us how far away the star is. The only way to calculate the absolute magnitude of a star is to know its distance from Earth. This information can be obtained from other sources, such as astrometric or parallax measurements, which measure the angular shift of the star's position in the sky as the Earth moves around its orbit.