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Boethin
Comet Boethin (officially 85D/Boethin) was a periodic Jupiter-family comet discovered in 1975 by Leo Boethin. It appeared again in January 1986 as expected. Although the comet was next expected at perihelion in April 1997, no observations were reported, and the comet is thought to have disintegrated. It has not been observed since March 1986. The comet might have come to perihelion in late July 2020, but the uncertainty in the comet's position is hundreds of millions of km. The old orbit would have the comet next coming to perihelion around November 2031. Discovery circumstances The comet was discovered under unusual circumstances. Comet 85D/Boethin was the first comet discovered by an observer in the Philippines. Leo Boethin (1912-1998), who was assigned as Reverend of the Abra province in 1949, had taken advantage of the exceptionally dark skies of Luzon to observe comets and meteor showers. In January 1973, he found his first suspected comet at magnitude 9.5, but he saw it fa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EPOXI
''EPOXI'' was a compilation of NASA Discovery program missions led by the University of Maryland and principal investigator Michael A'Hearn, with co-operation from the Jet Propulsion Laboratory and Ball Aerospace. ''EPOXI'' uses the '' Deep Impact'' spacecraft in a campaign consisting of two missions: the ''Deep Impact Extended Investigation'' (DIXI) and ''Extrasolar Planet Observation and Characterization'' (EPOCh). ''DIXI'' aimed to send the ''Deep Impact'' spacecraft on a flyby of another comet, after its primary mission was completed in July 2005, while ''EPOCh'' saw the spacecraft's photographic instruments as a space observatory, studying extrasolar planets. ''DIXI'' successfully sent the ''Deep Impact'' spacecraft on a flyby of comet Hartley 2 on November 4, 2010, revealing a "hyperactive, small and feisty" comet, after three gravity assists from Earth in December 2007, December 2008 and June 2010. The ''DIXI'' mission was not without problems, however; the spacecraf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Filipino Names In Space
This is a list of space objects and features which were named after Filipino people, mythology and places. Asteroids As of July 2024, there are 23 asteroids named after Filipino people, places and mythological creatures, all of which (except Anagolay and Duende) are located in the main asteroid belt between Mars and Jupiter , - , -bgcolor=#FFC2E0 , 3757 Anagolay , , , , Anagolay, the goddess of lost things in Tagalog mythology , , , -id=002 bgcolor=#d6d6d6 , 4866 Badillo , , , , Victor L. Badillo (1930–2014), Filipino Jesuit astronomer, former director of the Manila Observatory, president of the ''Philippine Astronomical Society'' (1972–1990), and honorary director of the ''Astronomical League of the Philippines'' , , , -id=003 bgcolor=#d6d6d6 , 5749 Urduja , , , , Urduja, a legendary 14th century princess from the land of ''Tawalisi'', which believed to be located in what is now the present-day Pangasinan , , , -id=004 bgcolor=#fefefe , 6282 Edweld ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
104P/Kowal
104P/Kowal, also known as Kowal 2, is a periodic Jupiter-family comet discovered by Charles T. Kowal in 1979. The orbit was confirmed after new sightings in 1991 and 1998. Observational history In 2003, Gary Kronk and Brian Marsden noticed that an object observed by Leo Boethin in 1973 was actually 104P/Kowal. From Boethin's report, it was apparent that comet Kowal 2 had been in a short, major outburst to apparent magnitude 9.5 in 1973. During the 1997–98 apparition, the comet was brighter than expected, reaching an apparent magnitude of 13 in mid January. The comet wasn't observed during the 2010 apparition. During the 2022 apparition, it brightened to a magnitude of 9.2 according to Chris Wyatt. Orbit The comet was in a orbit with a perihelion distance of 1.50 AU and an orbital period of 6.38 years until an approach to Jupiter Jupiter is the fifth planet from the Sun and the List of Solar System objects by size, largest in the Solar System. It is a gas giant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
103P/Hartley
Comet Hartley 2, designated as 103P/Hartley by the Minor Planet Center, is a small periodic comet with an orbital period of 6.48 years. It was discovered by Malcolm Hartley in 1986 at the Schmidt Telescope Unit, Siding Spring Observatory, Australia. Its diameter is estimated to be Hartley 2 was the target of a flyby of the '' Deep Impact'' spacecraft, as part of the EPOXI mission, on 4 November 2010, which was able to approach within of Hartley 2 as part of its extended mission. Hartley 2 is the smallest comet which has been visited. It is the fifth comet visited by spacecraft, and the second comet visited by the Deep Impact spacecraft, which first visited comet Tempel 1 on 4 July 2005. Discovery and orbit Comet Hartley 2 is a small Jupiter-family comet having an orbital period of 6.46 years. It was discovered by Malcolm Hartley in 1986 at the Schmidt Telescope Unit, Siding Spring Observatory, Australia. It has the perihelion near the Earth's orbit at from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lost Comets
A lost comet is one which was not detected during its most recent perihelion passage. This generally happens when data is insufficient to reliably calculate the comet's location or if the solar elongation is unfavorable near perihelion passage. The ''D/'' designation is used for a periodic comet that no longer exists or is deemed to have disappeared. Lost comets can be compared to lost asteroids (lost minor planets), although calculation of comet orbits differs because of nongravitational forces, such as emission of jets of gas from the comet nucleus, nucleus. Some astronomers have specialized in this area, such as Brian G. Marsden, who successfully predicted the 1992 return of the once-lost periodic comet Comet Swift–Tuttle, Swift–Tuttle. Overview Loss There are a number of reasons why a comet might be missed by astronomers during subsequent apparitions. Firstly, cometary orbits may be perturbation (astronomy), perturbed by interaction with the giant planets, such as Jup ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gary Kronk
Gary W. Kronk (born 1956) is an American amateur astronomer and writer. Biography Kronk was born in Granite City, Illinois, United States, on March 23, 1956. He developed an interest in space at an early age, during the time of the first crewed space flights of project Mercury; however, it was Mariner 4's close-up images of Mars that appeared on television the night of July 14, 1965 that focused his interest to astronomy. This interest was focused even more by Comet Kohoutek (C/1973 E1). Kronk first observed this comet on November 30, 1973, when he was a senior in high school. This observation provided the encouragement to research and write a paper about this comet and other great comets of the past for school. The teacher liked the paper so much, she submitted it to the local paper. He has been observing, researching, and writing about comets ever since. Kronk received a bachelor of science degree in journalism from Southern Illinois University Edwardsville in 1981. He was the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Julian Date
The Julian day is a continuous count of days from the beginning of the Julian period; it is used primarily by astronomers, and in software for easily calculating elapsed days between two events (e.g., food production date and sell by date). The Julian period is a chronological interval of 7980 years, derived from three multi-year cycles: the Indiction, Solar, and Lunar cycles. The last year that was simultaneously the beginning of all three cycles was , so that is year 1 of the current Julian period, making AD year of that Period. The next Julian Period begins in the year AD 3268. Historians used the period to identify Julian calendar years within which an event occurred when no such year was given in the historical record, or when the year given by previous historians was incorrect. The Julian day number (JDN) has the same epoch as the Julian period, but counts the number of days since the epoch rather than the number of years since then. Specifically, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IAU Circular
The International Astronomical Union Circulars (IAUCs) are notices that give information about astronomical phenomena. IAUCs are issued by the International Astronomical Union's Central Bureau for Astronomical Telegrams (CBAT) at irregular intervals for the discovery and follow-up information regarding such objects as planetary satellites, novae, supernovae, and comets. History The first series of IAUCs was published at Uccle during 1920–1922 when the IAU's first CBAT was located there; the first IAUC published in the present series was published in 1922 at Copenhagen Observatory after the transfer of the CBAT from Uccle to Copenhagen. At the end of 1964, the CBAT moved from Copenhagen to the Smithsonian Astrophysical Observatory in Cambridge, Massachusetts, where it remains, on the grounds of the Harvard College Observatory (HCO). HCO had maintained a Central Bureau for the Western hemisphere from 1883 until the end of 1964, when its staff took on the IAU's CBAT; HCO had p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Periodic Comets
Periodicity or periodic may refer to: Mathematics * Bott periodicity theorem, addresses Bott periodicity: a modulo-8 recurrence relation in the homotopy groups of classical groups * Periodic function, a function whose output contains values that repeat periodically * Periodic mapping Physical sciences * Periodic table of chemical elements * Periodic trends, relative characteristics of chemical elements observed * Redshift periodicity, astronomical term for redshift quantization Other uses * Fokker periodicity blocks, which mathematically relate musical intervals * Periodic acid, a compound of iodine * Principle of periodicity, a concept in generally accepted accounting principles * Quasiperiodicity, property of a system that displays irregular periodicity See also * Aperiodic (other) * Cycle (other) * Frequency (other) * Period (other) * Periodical Periodical literature (singularly called a periodical publication or simply a per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronomical Naming Conventions
In ancient times, only the Sun and Moon, a few stars, and the most easily visible planets had names. Over the last few hundred years, the number of identified astronomical objects has risen from hundreds to over a billion, and more are discovered every year. Astronomers need to be able to assign systematic designations to unambiguously identify all of these objects, and at the same time give names to the most interesting objects, and where relevant, features of those objects. The International Astronomical Union (IAU) is the recognized authority in astronomy for assigning designations to celestial bodies such as stars, planets, and minor planets, including any surface features on them. In response to the need for unambiguous names for astronomical objects, it has created a number of systematic naming systems for objects of various sorts. Stars There are no more than a few thousand stars that appear sufficiently bright in Earth's sky to be visible to the naked eye. This repres ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NASA
The National Aeronautics and Space Administration (NASA ) is an independent agencies of the United States government, independent agency of the federal government of the United States, US federal government responsible for the United States's civil list of government space agencies, space program, aeronautics research and outer space, space research. National Aeronautics and Space Act, Established in 1958, it succeeded the National Advisory Committee for Aeronautics (NACA) to give the American space development effort a distinct civilian orientation, emphasizing peaceful applications in space science. It has since led most of America's space exploration programs, including Project Mercury, Project Gemini, the 1968–1972 Apollo program missions, the Skylab space station, and the Space Shuttle. Currently, NASA supports the International Space Station (ISS) along with the Commercial Crew Program and oversees the development of the Orion (spacecraft), Orion spacecraft and the Sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
