Photometric parallax

The photometric parallax method is a method of data analysis used in astronomy that uses the colours and apparent brightnesses of stars to infer their distances. It was used by the Sloan Digital Sky Survey to discover the Virgo super star cluster.

Parallax method is only good for nearby stars (< 50pc or ~163ly) 1 Parsec (pc) is the distance associated with a parallax angle of 1" (" = arcseconds)

To calculate distance of a nearby star using the Parallax Method:

d= 1/Parallax angle

d will turn out as a Parsec (pc)

To give the distance in Lightyears (ly), use d= 3.26/Parallax angle

To

References

• Mario Juric, Zeljko Ivezic, Alyson Brooks, Robert H. Lupton, David Schlegel, Douglas Finkbeiner, Nikhil Padmanabhan, Nicholas Bond, Constance M. Rockosi, Gillian R. Knapp, James E. Gunn, Takahiro Sumi, Donald Schneider, J.C. Barentine, Howard J. Brewington, J. Brinkmann, Masataka Fukugita, Michael Harvanek, S.J. Kleinman, Jurek Krzesinski, Dan Long, Eric H. Neilsen, Jr., Atsuko Nitta, Stephanie A. Snedden, Donald G. York (2005-10-18). "The Milky Way Tomography with SDSS". {{cite journal}}: Cite journal requires |journal= (help)CS1 maint: multiple names: authors list (link)