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1171 Rusthawelia
1171 Rusthawelia, provisional designation , is a large and dark background asteroid, approximately in diameter, located in the outer regions of the asteroid belt. It was discovered on 3 October 1930, by Belgian astronomer Sylvain Arend at the Royal Observatory of Belgium in Uccle, and was an unnoticed rediscovery of a lost minor planet then known as "Adelaide". As the asteroid was already named for Georgian poet Shota Rustaveli when the rediscovery was realized, its former designation was given to another asteroid instead, which is now known as 525 Adelaide. ''Rusthawelia'' is a primitive P-type asteroid and has a rotation period of 11 hours. Unnoticed rediscovery of lost asteroid When Arend discovered ''Rusthawelia'' in 1930, it was not realized that he rediscovered the long-lost asteroid "525 Adelaide". It was already discovered 26 years earlier as by German astronomer Max Wolf at Heidelberg Observatory in March 1904, who observed it for a short time during the discov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lightcurve
In astronomy, a light curve is a graph of light intensity of a celestial object or region as a function of time, typically with the magnitude of light received on the y axis and with time on the x axis. The light is usually in a particular frequency interval or band. Light curves can be periodic, as in the case of eclipsing binaries, Cepheid variables, other periodic variables, and transiting extrasolar planets, or aperiodic, like the light curve of a nova, a cataclysmic variable star, a supernova or a microlensing event or binary as observed during occultation events. The study of the light curve, together with other observations, can yield considerable information about the physical process that produces it or constrain the physical theories about it. Variable stars Graphs of the apparent magnitude of a variable star over time are commonly used to visualise and analyse their behaviour. Although the categorisation of variable star types is increasingly done from their spe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
525 Adelaide
Adelaide (minor planet designation: 525 Adelaide) is an S-type asteroid belonging to the Flora family in the Main Belt. It was discovered 21 October 1908 by Joel Hastings Metcalf. Previously, the object A904 EB, discovered 14 March 1904 by Max Wolf, had been named 525 Adelaide but was subsequently lost. When it was rediscovered 3 October 1930 by Sylvain Arend as 1930 TA, it was named 1171 Rusthawelia. Some 28 years passed before the two objects were realized to be the same. 1930 TA retained the name Rusthawelia (and discovery credited to Arend); the name 525 Adelaide was reused for the object 1908 EKa. Another confusion occurred in 1929, one year before Arend's discovery, when American astronomer Anne Sewell Young thought to have found long-lost "Adelide", when in fact she mistook the asteroid for comet 31P/Schwassmann–Wachmann that had a very similar orbital eccentricity. References External links * * Flora asteroids Adelaide Adelaide Adelaide ( ) is t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semi-major Axis
In geometry, the major axis of an ellipse is its longest diameter: a line segment that runs through the center and both foci, with ends at the two most widely separated points of the perimeter. The semi-major axis (major semiaxis) is the longest semidiameter or one half of the major axis, and thus runs from the centre, through a focus, and to the perimeter. The semi-minor axis (minor semiaxis) of an ellipse or hyperbola is a line segment that is at right angles with the semi-major axis and has one end at the center of the conic section. For the special case of a circle, the lengths of the semi-axes are both equal to the radius of the circle. The length of the semi-major axis of an ellipse is related to the semi-minor axis's length through the eccentricity and the semi-latus rectum \ell, as follows: The semi-major axis of a hyperbola is, depending on the convention, plus or minus one half of the distance between the two branches. Thus it is the distance from the center ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asteroid Family
An asteroid family is a population of asteroids that share similar proper orbital elements, such as semimajor axis, eccentricity, and orbital inclination. The members of the families are thought to be fragments of past asteroid collisions. An asteroid family is a more specific term than asteroid group whose members, while sharing some broad orbital characteristics, may be otherwise unrelated to each other. General properties Large prominent families contain several hundred recognized asteroids (and many more smaller objects which may be either not-yet-analyzed, or not-yet-discovered). Small, compact families may have only about ten identified members. About 33% to 35% of asteroids in the main belt are family members. There are about 20 to 30 reliably recognized families, with several tens of less certain groupings. Most asteroid families are found in the main asteroid belt, although several family-like groups such as the Pallas family, Hungaria family, and the Phocaea family ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orbital Eccentricity
In astrodynamics, the orbital eccentricity of an astronomical object is a dimensionless parameter that determines the amount by which its orbit around another body deviates from a perfect circle. A value of 0 is a circular orbit, values between 0 and 1 form an elliptic orbit, 1 is a parabolic escape orbit (or capture orbit), and greater than 1 is a hyperbola. The term derives its name from the parameters of conic sections, as every Kepler orbit is a conic section. It is normally used for the isolated two-body problem, but extensions exist for objects following a rosette orbit through the Galaxy. Definition In a two-body problem with inverse-square-law force, every orbit is a Kepler orbit. The eccentricity of this Kepler orbit is a non-negative number that defines its shape. The eccentricity may take the following values: * circular orbit: ''e'' = 0 * elliptic orbit: 0 < ''e'' < 1 * [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
31P/Schwassmann–Wachmann
31P/Schwassmann–Wachmann, also known as Schwassmann–Wachmann 2, is a periodic comet in the Solar System. It was discovered on January 17, 1929, at an apparent magnitude of 11.Cometography Home Page The comet has been seen at every apparition. The comet nucleus is estimated to be 6.2 kilometers in diameter. In 1929, the astronomer Anne Sewell Young Anne Sewell Young (January 2, 1871 – August 15, 1961) was an American astronomer. She was an astronomy professor at Mount Holyoke College for 37 years. Biography Anne Sewell Young was born in Bloomington, Wisconsin on January 2, 1871, to Rever ... identified the comet with an object that had been misidentified as the minor planet "Adelaide" ( A904 EB). References External links Orbital simulationfrom JPL (Java) Horizons Ephemeris– Seiichi Yoshida @ aerith.net Periodic comets 0031 * 19290117 {{comet-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anne Sewell Young
Anne Sewell Young (January 2, 1871 – August 15, 1961) was an American astronomer. She was an astronomy professor at Mount Holyoke College for 37 years. Biography Anne Sewell Young was born in Bloomington, Wisconsin on January 2, 1871, to Reverend Albert Adams Young and Mary Sewell. She earned a B.L. from Minnesota's Carleton College in 1892. She then went to Walla Walla, Washington and taught mathematics at Whitman College for three years before returning to Carleton, earning her M.S. in 1897. She earned her Ph.D. from Columbia University in 1906. Her dissertation assessed measurements of early photographs and determined that the constellation Perseus had twice as many stars as previously thought. Young started her career at Mount Holyoke College in 1898. She was appointed director of the John Payson Williston Observatory, where she supervised an observational program tracking sunspots. She organized events at the observatory for Mount Holyoke students and in 1925 arranged f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joel Hastings Metcalf
Joel Hastings Metcalf (January 4, 1866 – February 23, 1925) was an American astronomer, humanitarian and Minister (Christianity), minister. Reverend Metcalf graduated from Harvard Divinity School in 1892. He served as a Unitarianism, Unitarian minister in Burlington, Vermont and in Taunton, Massachusetts, Winchester, Massachusetts and Portland, Maine. He discovered or co-discovered several comets, including 23P/Brorsen-Metcalf and 97P/Metcalf-Brewington, and also 41 asteroids during 1905–1914, as credited by the Minor Planet Center. Two of his discoveries, the main-belt asteroids 726 Joëlla and 792 Metcalfia, were named in his honor. Bibliography See also References External links Joel Hastings Metcalf – Minister, Humanitarian, AstronomerMetcalf, Joel Hastings (1866-1925) {{DEFAULTSORT:Metcalf, Joel Hastings 1866 births 1925 deaths American astronomers Discoverers of asteroids Discoverers of comets Harvard Divinity School alumni People from Bu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
525 Adelaide
Adelaide (minor planet designation: 525 Adelaide) is an S-type asteroid belonging to the Flora family in the Main Belt. It was discovered 21 October 1908 by Joel Hastings Metcalf. Previously, the object A904 EB, discovered 14 March 1904 by Max Wolf, had been named 525 Adelaide but was subsequently lost. When it was rediscovered 3 October 1930 by Sylvain Arend as 1930 TA, it was named 1171 Rusthawelia. Some 28 years passed before the two objects were realized to be the same. 1930 TA retained the name Rusthawelia (and discovery credited to Arend); the name 525 Adelaide was reused for the object 1908 EKa. Another confusion occurred in 1929, one year before Arend's discovery, when American astronomer Anne Sewell Young thought to have found long-lost "Adelide", when in fact she mistook the asteroid for comet 31P/Schwassmann–Wachmann that had a very similar orbital eccentricity. References External links * * Flora asteroids Adelaide Adelaide Adelaide ( ) is t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minor Planet Circulars
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 The Minor Planet Center is the official worldwide organization in charge of collecting observational data for minor planets (such as asteroids), calculating their orbits and publishing this information via the '' Minor Planet Circulars''. Under the auspices of the International Astronomical Union (IAU), it operates at the Smithsonian Astrophysical Observatory, which is part of the Center for Astrophysics along with the Harvard College Observatory. The MPC runs a number of free online services for observers to assist them in observing minor planets and comets. The complete catalogue of minor planet orbits (sometimes referred to as the "Minor Planet Catalogue") may also be freely downloaded. In addition to astrometric data, the MPC collect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
André Patry
André Patry (22 November 1902 – 20 June 1960) was a French astronomer and discoverer of 9 minor planets in the late 1930s. Patry was orphaned at a young age, and began working as a 17-year-old at the Nice Observatory in southeastern France. He studied asteroids and discovered several himself. The inner main-belt asteroid 1601 Patry was named in his honor (). References External links Obituary – JO 43 (1960) 156 1902 births 1960 deaths Discoverers of asteroids Discoveries by André Patry, * 20th-century French astronomers {{france-astronomer-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heidelberg Observatory
Heidelberg (; Palatine German: '''') is a city in the German state of Baden-Württemberg, situated on the river Neckar in south-west Germany. As of the 2016 census, its population was 159,914, of which roughly a quarter consisted of students. Located about south of Frankfurt, Heidelberg is the fifth-largest city in Baden-Württemberg. Heidelberg is part of the densely populated Rhine-Neckar Metropolitan Region. Heidelberg University, founded in 1386, is Germany's oldest and one of Europe's most reputable universities. Heidelberg is a scientific hub in Germany and home to several internationally renowned research facilities adjacent to its university, including the European Molecular Biology Laboratory and four Max Planck Institutes. The city has also been a hub for the arts, especially literature, throughout the centuries, and it was designated a "City of Literature" by the UNESCO Creative Cities Network. Heidelberg was a seat of government of the former Electorate of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
