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Oterma
Liisi Oterma (; 6 January 1915 – 4 April 2001) was a Finland, Finnish astronomer, the first woman to get a Doctor of Philosophy, Ph.D. degree in astronomy in Finland. She studied mathematics and astronomy at the University of Turku, and soon became Yrjö Väisälä's assistant and worked on the search for minor planets. She obtained her masters degree in 1938. From 1941 to 1965, Oterma worked as an observer at the university's observatory. She obtained her PhD in 1955 with a dissertation on telescope optics. She was the first Finnish woman to obtain a PhD in astronomy. In 1959, Oterma became a docent of astronomy and from 1965 to 1978 a professor in University of Turku. In 1971, she succeeded Väisälä as the director of the Tuorla Observatory. She was director of the astronomical-optical research institute at the University of Turku from 1971-1975. Oterma was interested in languages and spoke German, French, Italian, Spanish, Esperanto, Hungarian, English and also Arab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
39P/Oterma
39P/Oterma is a currently inactive List of periodic comets, periodic comet with an orbital period of nearly 20 years that stays outside the orbit of Jupiter. The comet nucleus, nucleus has a diameter around 4–5 km. It was last observed in August 2021 and came to perihelion in July 2023 while 1.2 Astronomical unit, AU from Jupiter. It will finish the modest 39P/Oterma#CA2025, approach to Jupiter in January 2025 and will next come to perihelion in July 2042 at distance of 5.9 AU from the Sun. Opposition (astronomy), Opposition will occur on 11 November 2023. Discovery The comet was discovered by Liisi Oterma at Iso-Heikkilä Observatory, Turku University Observatory, Finland on a photo plate on 8 April 1943 as a faint object of 15th Apparent magnitude, magnitude in the constellation of Virgo (constellation), Virgo. Its orbit was calculated by Leland Cunningham, L. E. Cunningham and R. N. Thomas who derived an orbit with a small Orbital eccentricity, eccentricity, a Apsis, perihel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1529 Oterma
1529 Oterma, provisional designation , is a reddish, rare-type Hildian asteroid from the outermost region of the asteroid belt, approximately 56 kilometers in diameter. It was discovered on 26 January 1938, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. It is named for Liisi Oterma. Orbit and classification ''Oterma'' is a member of the Hilda family, a large group of asteroids that orbit in resonance with the gas giant Jupiter. Hildian asteroids are thought to have originated from the Kuiper belt in the outer Solar System. It orbits the Sun in the outer main-belt at a distance of 3.2–4.8 AU once every 7 years and 12 months (2,914 days). Its orbit has an eccentricity of 0.20 and an inclination of 9 ° with respect to the ecliptic. It was first identified as at Winchester Observatory in 1912 (). The body's observation arc begins at Turku a few weeks after its official discovery observation. Physical characteristics ''Oterma'' bel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
139P/Väisälä–Oterma
139P/Väisälä–Oterma is a periodic comet in the Solar System. When it was discovered in 1939 it was not recognized as a comet and designated as 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. ... ''1939 TN''. References External links Orbital simulationfrom JPL (Java) Horizons Ephemeris– Seiichi Yoshida @ aerith.net Periodic comets 0139 Discoveries by Liisi Oterma + Comets in 2017 19391007 {{comet-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1695 Walbeck
1695 Walbeck, provisional designation , is a carbonaceous asteroid from the central region of the asteroid belt, approximately 19 kilometers in diameter. It was discovered on 15 October 1941, by Finnish astronomer Liisi Oterma at Turku Observatory in Southwest Finland, and named after Henrik Walbeck. Classification and orbit The asteroid orbits the Sun in the central main-belt at a distance of 2.0–3.6 AU once every 4 years and 8 months (1,694 days). Its orbit has an eccentricity of 0.29 and an inclination of 17 ° with respect to the ecliptic. ''Walbeck''s observation arc begins the night after its official discovery observation. Physical characteristics In the SMASS taxonomy, the carbonaceous asteroid is characterized as a Cg-type, an intermediate between the C-type and G-type asteroids. Lightcurves In November 2006, a rotational lightcurve of ''Walbeck'' was obtained from photometric observations by French amateur astronomer Pierre Antonini. It gave a rotat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1680 Per Brahe
1680 Per Brahe, provisional designation , is a bright background asteroid from the central region of the asteroid belt, approximately in diameter. It was discovered on 12 February 1942, by Finnish astronomer Liisi Oterma at Turku Observatory in Southwest Finland. The stony S-type asteroid has a rotation period of 3.4 hours. It is named after Swedish count and governor Per Brahe the Younger. Orbit and classification The S-type asteroid is a non-family asteroid of the main belt's background population. It orbits the Sun in the central main-belt at a distance of 2.2–3.2 AU once every 4 years and 6 months (1,643 days; semi-major axis of 2.73 AU). Its orbit has an eccentricity of 0.18 and an inclination of 4 ° with respect to the ecliptic. ''Per Brahe'' was first identified as at Heidelberg Observatory in 1902, extending the asteroid's observation arc by 40 years prior to its official discovery observation. Naming This minor planet was named for Swedish count ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1559 Kustaanheimo
1559 Kustaanheimo, provisional designation , is a stony asteroid from the inner regions of the asteroid belt, approximately 11 kilometers in diameter. It was discovered on 20 January 1942, by Finnish astronomer Liisi Oterma at the Iso-Heikkilä Observatory near Turku in southwest Finland. The asteroid was named after Finnish astronomer Paul Kustaanheimo (1924–1997). Orbit and classification ''Kustaanheimo'' is an asteroid from the main belt's background population that does not belong to any known asteroid family. It orbits the Sun in the inner main-belt at a distance of 2.1–2.7 AU once every 3 years and 8 months (1,350 days). Its orbit has an eccentricity of 0.13 and an inclination of 3 ° with respect to the ecliptic. In March 1935, the asteroid was first identified as at the Union Observatory in Johannesburg. The body's observation arc begins at Johannesburg in the following month, with its identification as , almost 7 years prior to its official discovery obser ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1558 Järnefelt
1558 Järnefelt, provisional designation , is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 65 kilometers in diameter. It was discovered on 20 January 1942, by Finnish astronomer Liisi Oterma at Turku Observatory in Southwest Finland, and later named for Finnish astronomer Gustaf Järnefelt (1901–1989). Classification and orbit The dark C-type asteroid is not a member of any known asteroid family. It orbits the Sun in the outer main-belt at a distance of 3.1–3.3 AU once every 5 years and 9 months (2,113 days). Its orbit has an eccentricity of 0.03 and an inclination of 10 ° with respect to the ecliptic. ''Järnefelt'' was first identified as at Heidelberg in 1913. Its first used observation was made at Johannesburg Observatory in 1934, extending the body's observation arc by 8 years prior to its official discovery observation. Lightcurve In May 2007, a fragmentary rotational lightcurve of ''Järnefelt'' was obtained from pho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1545 Thernöe
1545 Thernöe ( ''prov. designation'': ) is an elongated background asteroid from the central region of the asteroid belt. It was discovered on 15 October 1941, by Finnish astronomer Liisi Oterma at Turku Observatory in Southwest Finland. The uncommon K-type asteroid has a rotation period of 16.1 hours and measures approximately in diameter. It was later named after Danish astronomer Karl August Thernöe. Orbit ''Thernöe'' orbits the Sun in the central main-belt at a distance of 2.1–3.4 AU once every 4 years and 7 months (1,684 days). Its orbit has an eccentricity of 0.24 and an inclination of 3 ° with respect to the ecliptic. It was first identified as at Heidelberg Observatory in 1906, extending the body's observation arc by 35 years prior to its official discovery observation at Turku. Naming This minor planet was named after Karl August Thernöe (1911–1987), Danish astronomer and celestial mechanic at Østervold Observatory in Copenhagen. He was also a po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1544 Vinterhansenia
1544 Vinterhansenia, provisional designation , is a dark asteroid from the inner regions of the asteroid belt, approximately 22 kilometers in diameter. It was discovered on 15 October 1941, by Finnish astronomer Liisi Oterma at Turku Observatory in Southwest Finland, and named for Danish astronomer Julie Vinter Hansen. Orbit and classification ''Vinterhansenia'' is classified as both C-type and X-type asteroid. It orbits the Sun in the inner main-belt at a distance of 2.1–2.6 AU once every 3 years and 8 months (1,335 days). Its orbit has an eccentricity of 0.11 and an inclination of 3 ° with respect to the ecliptic. ''Vinterhansenia'' was first identified as at Heidelberg Observatory in 1906. Its first used observation, , was also taken at Heidelberg in 1928, and extends the body's observation arc by 13 years prior to its official discovery observation at Turku in 1941. Lightcurves Two rotational lightcurves of ''Vinterhansenia'' were obtained from photometric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1540 Kevola
1540 Kevola, provisional designation , is a dark background asteroid from the outer regions of the asteroid belt, approximately 42 kilometers in diameter. It was discovered on 16 November 1938, by astronomer Liisi Oterma at the Iso-Heikkilä Observatory in Turku, Finland. The asteroid was named after the Finnish Kevola Observatory. Orbit and classification ''Kevola'' is a non-family asteroid of the main belt's background population. It orbits the Sun in the outer asteroid belt at a distance of 2.6–3.1 AU once every 4 years and 10 months (1,758 days). Its orbit has an eccentricity of 0.09 and an inclination of 12 ° with respect to the ecliptic. The body's observation arc begins with its first identification as at Heidelberg Observatory in April 1926, more than 12 years prior to its official discovery observation at Turku. Naming This minor planet was named for the Finnish Kevola Observatory . The official was published by the Minor Planet Center on 20 February 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1522 Kokkola
1522 Kokkola, provisional designation , is a stony Vestian asteroid from the inner regions of the asteroid belt, approximately 9.5 kilometers in diameter. It was discovered on 18 November 1938, by pioneering Finnish astronomer Liisi Oterma at Turku Observatory in Southwest Finland. It was later was named for the town of Kokkola. Classification and orbit The S-type asteroid and member of the Vesta family is also classified as LS-type, an intermediate to the L-types. It orbits the Sun at a distance of 2.2–2.5 AU once every 3 years and 8 months (1,331 days). Its orbit has an eccentricity of 0.07 and an inclination of 5 ° with respect to the ecliptic. Due to a precovery taken at Turku, ''Kokkola''s observation arc was extended by 3 weeks prior to its official discovery observation. Physical characteristics In May 1984, American astronomer Richard Binzel obtained a rotational lightcurve of ''Kokkola'' from photometric observations. Lightcurve analysis gave a well-define ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1504 Lappeenranta
1504 Lappeenranta, provisional designation , is a stony background asteroid from the inner regions of the asteroid belt, approximately 12 kilometers in diameter. It was discovered on 23 March 1939, by Finnish astronomer Liisi Oterma at the Iso-Heikkilä Observatory, and named after the city of Lappeenranta in Finland. Orbit and classification ''Lappeenranta'' is a non-family asteroid from the main belt's background population. It orbits the Sun in the inner asteroid belt at a distance of 2.0–2.8 AU once every 3 years and 9 months (1,358 days). Its orbit has an eccentricity of 0.16 and an inclination of 11 ° with respect to the ecliptic. The body's observation arc begins four nights prior to its official discovery observation at Turku. Physical characteristics In the Tholen classification, ''Lappeenranta'' is a common S-type asteroid. Pan-STARRS photometric survey has also characterized it as an S-type. Rotation period ''Lappeenranta'' has an ambiguous rotation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
