A Comprehensive Set of Equations for Celestial Visibility Calculations
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**Session 27 -- Celestial Visibility**
*Oral presentation, Wednesday, January 12, 10:15-11:45, Salons A/B Room (Crystal City Marriott)*

## [27.07] A Comprehensive Set of Equations for Celestial Visibility Calculations

*Bradley E. Schaefer (NASA/GSFC)*
Celestial visibility is the study of the limits of observability of objects
in the sky, with applications to deducing the truth about historical events
or to the derivation of astronomical information of modern utility.
Celestial visibility calculations involve modelling of phenomena from
astronomy, meteorology, optics, physics, and physiology, and the necessary
equations are widely scattered over the scientific literature. This poster
will present 84 equations with numerous references and tables of typical
values. The point is that this set of equations can easily be used to
solve most celestial visibility problems.

**Wednesday
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