Astrometry: The Foundation for Observational Astronomy


  • Amith Govind University of Bonn
  • Devarshi Choudhury University of Amsterdam
  • Blesson Mathew CHRIST (Deemed to be University)
  • Paul K T CHRIST (Deemed to be University)



Astronomy has seen unprecedented growth in the past century, due to the rise in multiwavelength observations. The foundation for multiwavelength astronomy is given by Astrometry; the science of position and motion determination of celestial bodies. We present a technique of determining equatorial coordinates of celestial bodies from their pixel coordinates. We also present the subsequent results of using this technique in achieving the initial few steps required for the multiwavelength studies of young open clusters.

Author Biographies

Amith Govind, University of Bonn

Department of Physics and Astronomy, University of Bonn

Devarshi Choudhury, University of Amsterdam

Anton Pannekoek Institute for Astronomy, University of Amsterdam


[1] R. Berry and J. Burnell, The handbook of astronomical image processing. 2005.
[2] M. R. Calabretta and E. W. Greisen, “Representations of celestial coordinates in FITS”, Astronomy and Astrophysics, vol. 395, pp.1077–1122, December 2002.
[3] B. W. Carroll and D. A. Ostlie, An Introduction to Modern Astrophysics. 1996.
[4] W. Fricke and A. Kopff. Fundamental Catalogue (FK 4). 1963.
[5] W. Fricke, H. Schwan, T. Lederle, U. Bastian, R. Bien, G. Burkhardt, B. Du Mont, R. Hering, R. J¨ahrling, H. Jahreiß, S. R¨oser, H.-M. Schwerdtfeger, and H. G. Walter, Fifth fundamental catalogue (FK5). Part 1: The basic fundamental stars, Veroeffentlichungen des Astronomischen Rechen-Instituts Heidelberg, vol. 32, pp.1–106, 1988.
[6] K. J. Johnston and Chr. de Vegt, “Reference frames in astronomy,” Annual Review of Astronomy and Astrophysics, vol. 37, no. 1, pp.97–125, 1999.
[7] J. Kovalevsky, I. I. Mueller, and B. Kolaczek, editors. Reference frames in astronomy and geophysics, Astrophysics and Space Science Library, vol. 154, 1989.
[8] B. G. Marsden, “How to reduce plate measurements,” Sky and Telescope, vol. 64, pp.284, 1982.
[9] R. L. Phelps and K. A. Janes, “Young open clusters as probes of the star formation process. 1: An atlas of open cluster photometry,” Astrophysical Journal Supplement Series, vol. 90, pp.31–82, January 1994.
[10] M. F. Skrutskie, R. M. Cutri, R. Stiening, M. D. Weinberg, S. Schneider, J. M. Carpenter, C. Beichman, R. Capps, T. Chester, J. Elias, J. Huchra, J. Liebert, C. Lonsdale, D. G. Monet, S. Price, P. Seitzer, T. Jarrett, J. D. Kirkpatrick, J. E. Gizis, E. Howard, T. Evans, J. Fowler, L. Fullmer, R. Hurt, R. Light, E. L. Kopan, K. A. Marsh, H. L. McCallon, R. Tam, S. Van Dyk, and S. Wheelock, “The Two Micron All Sky Survey (2MASS),” The Astronomical Journal, vol. 131, pp.1163–1183, February 2006.
[11] S. W. Stahler and F. Palla, The Formation of Stars. 2005.
[12] H. G. Walter and O. J. Sovers, editors. Astrometry of fundamental catalogues: the evolution from optical to radio reference frames. 2000.
[15] glangsto/SIP/astrometry.html

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