Alan William James Cousins

Alan William James Cousins
Alan William James Cousins
Born	8 August 1903; Three Anchor Bay, Cape Town, South Africa
Died	11 May 2001 (aged 97); Cape Town
Education	Pretoria Boys High School; University of the Witwatersrand
Alma mater	University of Cape Town
Spouse	Alison Mavis Donaldson
	Scientific career
Fields	Photometry
Institutions	C.A. Parson Engineering works; Electricity Supply Commission; Royal Observatory, Cape of Good Hope
Thesis	Standard Magnitude Sequences in the E regions (1954)

Alan William James Cousins FRAS (8 August 1903 – 11 May 2001) was a South African astronomer. His career spanned 70 years during which time he concentrated on the measurement of variable stars, including the measurement of the two sinusoidal periods of Gamma Doradus. The UBV photometric system for measuring stellar fluxes he devised in his 1990s became a standard known as the "Cousins system".

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Alan William James Cousins
Born	(1903-08-08)8 August 1903 Three Anchor Bay, Cape Town, South Africa
Died	11 May 2001(2001-05-11) (aged 97)^[1] Cape Town
Education	Pretoria Boys High School University of the Witwatersrand
Alma mater	University of Cape Town^[2]
Spouse	Alison Mavis Donaldson
Scientific career
Fields	Photometry
Institutions	C.A. Parson Engineering works Electricity Supply Commission Royal Observatory, Cape of Good Hope
Thesis	Standard Magnitude Sequences in the E regions (1954)