30 06 2017 You cannot understand the glories

30. 06. 2017

You cannot understand the glories of the universe without believing there iis SUPREME POWER behind it -Stephen Hawking

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N. R. Pogson was an English Astronomer. He worked in India at Madras Observatory He discovered several minor planets and Pogson’s ratio

MADRAS OBSERVATORY

EXCLUSIVELY WORKED ON STARS IN 1931 IT WAS CHANGED TO THE CATEGORY OF AN ORDINARY PILOT BALLON OBSERVATORY IT HAD BEEN DELIVERING THE TIME SIGNAL THROUGHOUT THE INDIA

J. C. Bhattacharyya Jagadish Chandra Bhattacharyya, also known as J. C. Bhattacharyya In 1971 he discovered a thin atmosphere around Ganymede, a satellite of Jupiter.

GANYMEDE

ASP POGSON’S O RA

The brightness ratio of two celestial objects that differ by one magnitude. On the Pogson scale a difference of 5 magnitudes is defined as a difference of 100 in the intensity of two stars. Therefore a difference of 1 magnitude is equal to fifth root of 100, i. e. 2. 512

Pogson’s Ratio is given by,

POGSON’S FINDINGS

He found out , He found out 88 asteriods asteroids theynamely are 42 -ISIS On May 23, 1856 42 IRIS-23 may, 1856 43 ARIADNE-15 april, 1857 43 -ARIADNE On April 15, 1857 46 HESTIA-16 august, 1857 46 -HESTIA On August 16, 1857 67 ASIA-17 april, 1861 67 -ASIA On April 17, 1861 80 SOPHIA -2 may, 1864 80 -SAPPHO On May 2, 1864 87 SYLVIA-16 may, 1866 87 -SYLVIA May 16, 1866 107 On CARNILLA-17 nov, 1868 245 On VERA -6 feb, 1885 17, 1868 107 -CAMILLA November 245 -VERA On February 6, 1885

42 ISIS-23 may , 1856

It is the name of the an Egyptian goddess The spectrum of it reveals strong presence of the mineral OLIVINE

43 ARIADNE: It is large and bright main belt asteroid. Second largest member of the FLORA ASTEROID FAMILY

46 -HESTIA : It is large dark main belt asteroid It is also the primary body of the HESTIA CLUMP

67 -ASIA: : It is a dark bright asteroid from the Asteriod belt. It was discovered at Madras Observatory.

80 SAPPHO

80 -SAPPHO: The largest asteroid in the asteroid belt. Named after the Greek poet.

87 SLYVIA

87 -SLYVIA The largest asteroid in the asteroid belt. It is member of Cebele group. It possess more

87 SLYVIA

CEBELE GROUP

107 CAMILLA

107 -CAMILLA It has a very dark surface and primitive carbonacious composition. . Named after Camilla Queen of

245 VERA

245 -VERA It is classified as SType asteroid.

HONOURS: Pogson was created a companion of the Most Eminent Order of the Indian. Empire in January 1879. The following celestial body is named after him : Asteriod 1830 POGSON The LUNAR CRATER POGSON Asteriod 42 ISIS is believed to be named after Elizabeth Isis Pogson.

S. B. EZHILARASI B EZHILARASI III BSCS PHYSICS DGVAISHNAVCOLLEGE DG Chennai , CHENNAI 30. 06. 2017