As a next step to Basic Astronomy Course, Parisanstha has organized a course based on mathematical astronomy for the members of Parisanstha: “Elementary Positional Astronomy”. Mr. V. V. Sovani, Former President of Jyotirvidya Parisanstha conducted this course at Tilak Smarak Mandir. The topics covered in this course were: Spherical trigonometry, Celestial co-ordinate system and their inter-conversions, Planetary orbital elements, Time system – equation of time, Rising, setting, meridian transits of celestial bodies, Angular distance calculations, Geometric and heliocentric coordinate transformations, Binary stars, Diffraction, parallax calculations, Occultation and eclipse calculations, Comets related calculations. 29 members participated in this course.