Education
He studied in a Mining and Metallurgy program at the University of the Witwatersrand.
He studied in a Mining and Metallurgy program at the University of the Witwatersrand.
During the Second World War he served in the South African Air Force and was awarded the Africa Star and mentioned in Dispatches. After the war he worked for South African Airways and South African Railways. She died in 1985.
Daniel Overbeek"s serious interest in astronomy dates back to 1951, when he started observing occultations and variable stars.
In 1958 he earned a Bachelor of Science degree in mathematics and astronomy from the University of South Africa.
In his life he contributed 287,240 observations to the American Association of Variable Star Observers (AAVSO) International Database, becoming the most prolific AAVSO contributor. In 1998 he became the first amateur astronomer who detected supernova related gamma ray burst effects.
He also monitored Earth"s magnetic field and seismic activity with a magnetometer and a seismograph he had built, and observed sudden ionospheric disturbance. Acknowledgement
He was elected the president of the ASSA twice: in 1961 and 1999.
In 1984 he was awarded the Gill Medal, the highest ASSA honour.
He was also a multiple AAVSO Observer awardee: in 1994 for making 100,000 variable star observations, in 1997 for 200,000 and in 1999 for 250,000 observations. In 1995 he received the Christos Papadopoulos Trophy of the Transvaal Centre of the ASSA. The Mars-crosser asteroid 5038 Overbeek was named in his honour in 2000.