Alfred Witte (2 March 1878 in Hamburg, Germany – 4 August 1941 in Hamburg, Germany), was a German surveyor, astrologer, an amateur astronomer, and the founder of the Hamburg School of Astrology. Witte revived and further developed the use of astrological midpoints (a+b)/2 for precision in astrological analysis and prediction. Alfred Witte died 4 August 1941, Hamburg. The time of death is unclear.
In his early writings between 1919 and 1925 (his first was 1913), he experimented with numerous historical astrology techniques, including the astrological houses, planetary formulae a+b-c = c similar to Arabic parts, and for a brief period a new scheme of planetary rulerships. His approach to astrology was to verify assumptions by current reality checks rather than historical validation. He sought to approach astrology as a science, and the controversy over his assertion of the existence of Trans-Neptunian objects other than Pluto led to widespread ridicule and rejection during his later years.
In Wiite's times, many Astronomers proposed hypothetical Trans-Neptunian objects. So Witte proposed the existence of several hypothetical Trans-Neptunian objects, too. While modern technology has verified the existence of thousands of Trans-Neptunian objects, the specific Trans-Neptunian objects that are used by the Hamburg School and Uranian astrology have not yet been validated or disproven as of September 2011. Some members of the Hamburg School have for a number of years asserted that some of Witte's Trans-Neptunians may actually be the barycenters of clusters of Trans-Neptunian objects, and shun both the labels "planet" and "object" for this reason. Witte did however describe the colors of two of his inner Transneptunians, Cupido and Hades, in articles in the anthology Der Mensch - Eine Empfangsstation kosmischer Suggestionen. Witte was prohibited by the Third Reich from recording his observations during the last years of his life.