Holger Thiele (September 25, 1878 – June 5, 1946) was a

Danish American Danish Americans ( da, Dansk-amerikanere) are Americans who have ancestral roots originated fully or partially from Denmark. There are approximately 1,300,000 Americans of Danish origin or descent. History The first Dane known to have arriv ...

astronomer An astronomer is a scientist in the field of astronomy who focuses their studies on a specific question or field outside the scope of Earth. They observe astronomical objects such as stars, planets, natural satellite, moons, comets and galaxy, g ...

and

discoverer of minor planets This is a list of minor-planet discoverers credited by the Minor Planet Center with the discovery of one or several minor planets (such as near-Earth and main-belt asteroids, Jupiter trojans and distant objects). , the discovery of 612,011 numb ...

and

comet A comet is an icy, small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process that is called outgassing. This produces a visible atmosphere or coma, and sometimes also a tail. These phenomena ar ...

s. He was the son of Thorvald Nicolai Thiele (1838–1910), the noted

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astronomer, actuary and mathematician, after whom the

main-belt The asteroid belt is a torus-shaped region in the Solar System, located roughly between the orbits of the planets Jupiter and Mars. It contains a great many solid, irregularly shaped bodies, of many sizes, but much smaller than planets, called ...

asteroid

1586 Thiele Events * January 18 – The 7.9 Tenshō earthquake strikes the Chubu region of Japan, triggering a tsunami and causing at least 8,000 deaths. * June 16 – The deposed and imprisoned Mary, Queen of Scots, recognizes Philip II of ...

is named. Holger Thiele is credited by the

Minor Planet Center The Minor Planet Center (MPC) is the official body for observing and reporting on minor planets under the auspices of the International Astronomical Union (IAU). Founded in 1947, it operates at the Smithsonian Astrophysical Observatory. Function ...

with the discovery of 4 numbered

asteroid An asteroid is a minor planet of the inner Solar System. Sizes and shapes of asteroids vary significantly, ranging from 1-meter rocks to a dwarf planet almost 1000 km in diameter; they are rocky, metallic or icy bodies with no atmosphere. ...

s during 1914–1916. He also discovered the comet C/1906 V1 and calculated the orbits of other comets. He worked at

Hamburg-Bergedorf Observatory Hamburg Observatory (german: Hamburger Sternwarte) is an astronomical observatory located in the Bergedorf borough of the city of Hamburg in northern Germany. It is owned and operated by the University of Hamburg, Germany since 1968, although it ...

Bergedorf Bergedorf () is the largest of the seven boroughs of Hamburg, Germany, named after Bergedorf quarter within this borough. In 2020 the population of the borough was 130,994. History The city of Bergedorf received town privileges in 1275, then ...

, in

Hamburg (male), (female) en, Hamburger(s), Hamburgian(s) , timezone1 = Central (CET) , utc_offset1 = +1 , timezone1_DST = Central (CEST) , utc_offset1_DST = +2 , postal ...

, Germany. In 1912, he immigrated to the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

. In 1917, he started working as a fellow for the

University of California The University of California (UC) is a public land-grant research university system in the U.S. state of California. The system is composed of the campuses at Berkeley, Davis, Irvine, Los Angeles, Merced, Riverside, San Diego, San Francisco, ...

Lick Observatory The Lick Observatory is an astronomical observatory owned and operated by the University of California. It is on the summit of Mount Hamilton, in the Diablo Range just east of San Jose, California, United States. The observatory is managed by th ...

, near San Jose, California. Holger Thiele died in

Alameda County Alameda County ( ) is a List of counties in California, county located in the U.S. state of California. As of the 2020 United States Census, 2020 census, the population was 1,682,353, making it the 7th-most populous county in the state and List ...

in 1946.SAO/NASA Astrophysics Data System (ADS)
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Selected works

* ''Corrected elements and ephemeris of minor planet 1924 TD'' (Baade) (University of California Press. 1925) * ''Elements and ephemeris of Comet d 1927'' (Stearns) (University of California Press. 1927)

References

1878 births 1946 deaths 20th-century American astronomers 20th-century Danish astronomers Discoverers of asteroids Discoverers of comets * Danish emigrants to the United States {{denmark-scientist-stub