Table of Contents
19 relations: Apparent magnitude, Astronomical unit, Asymptotic giant branch, Constellation, Durchmusterung, Henry Draper Catalogue, Hipparcos, Light curve, Maser, Minute and second of arc, Mira variable, Orion (constellation), Smithsonian Astrophysical Observatory, Stellar wind, Variable-star designation, Very Large Telescope, Very Long Baseline Array, Very-long-baseline interferometry, Washington Double Star Catalog.
Apparent magnitude
Apparent magnitude is a measure of the brightness of a star or other astronomical object.
See S Orionis and Apparent magnitude
Astronomical unit
The astronomical unit (symbol: au, or AU) is a unit of length defined to be exactly equal to.
See S Orionis and Astronomical unit
Asymptotic giant branch
The asymptotic giant branch (AGB) is a region of the Hertzsprung–Russell diagram populated by evolved cool luminous stars.
See S Orionis and Asymptotic giant branch
Constellation
A constellation is an area on the celestial sphere in which a group of visible stars forms a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.
See S Orionis and Constellation
Durchmusterung
In astronomy, Durchmusterung or Bonner Durchmusterung (BD) is an astrometric star catalogue of the whole sky, published by the Bonn Observatory in Germany from 1859 to 1863, with an extension published in Bonn in 1886.
See S Orionis and Durchmusterung
Henry Draper Catalogue
The Henry Draper Catalogue (HD) is an astronomical star catalogue published between 1918 and 1924, giving spectroscopic classifications for 225,300 stars; it was later expanded by the Henry Draper Extension (HDE), published between 1925 and 1936, which gave classifications for 46,850 more stars, and by the Henry Draper Extension Charts (HDEC), published from 1937 to 1949 in the form of charts, which gave classifications for 86,933 more stars. S Orionis and Henry Draper Catalogue are Henry Draper Catalogue objects.
See S Orionis and Henry Draper Catalogue
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993.
Light curve
In astronomy, a light curve is a graph of the 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.
Maser
A maser is a device that produces coherent electromagnetic waves (microwaves), through amplification by stimulated emission.
Minute and second of arc
A minute of arc, arcminute (arcmin), arc minute, or minute arc, denoted by the symbol, is a unit of angular measurement equal to of one degree.
See S Orionis and Minute and second of arc
Mira variable
Mira variables (named for the prototype star Mira) are a class of pulsating stars characterized by very red colours, pulsation periods longer than 100 days, and amplitudes greater than one magnitude in infrared and 2.5 magnitude at visual wavelengths. S Orionis and Mira variable are Mira variables.
See S Orionis and Mira variable
Orion (constellation)
Orion is a prominent set of stars visible during winter in the northern celestial hemisphere.
See S Orionis and Orion (constellation)
Smithsonian Astrophysical Observatory
The Smithsonian Astrophysical Observatory (SAO) is a research institute of the Smithsonian Institution, concentrating on astrophysical studies including galactic and extragalactic astronomy, cosmology, solar, earth and planetary sciences, theory and instrumentation, using observations at wavelengths from the highest energy gamma rays to the radio, along with gravitational waves.
See S Orionis and Smithsonian Astrophysical Observatory
Stellar wind
A stellar wind is a flow of gas ejected from the upper atmosphere of a star.
See S Orionis and Stellar wind
Variable-star designation
In astronomy, a variable-star designation is a unique identifier given to variable stars. S Orionis and variable-star designation are objects with variable star designations.
See S Orionis and Variable-star designation
Very Large Telescope
The Very Large Telescope (VLT) is an astronomical facility operated since 1998 by the European Southern Observatory, located on Cerro Paranal in the Atacama Desert of northern Chile.
See S Orionis and Very Large Telescope
Very Long Baseline Array
The Very Long Baseline Array (VLBA) is a system of ten radio telescopes which are operated remotely from their Array Operations Center located in Socorro, New Mexico, as a part of the National Radio Astronomy Observatory (NRAO).
See S Orionis and Very Long Baseline Array
Very-long-baseline interferometry
Very-long-baseline interferometry (VLBI) is a type of astronomical interferometry used in radio astronomy.
See S Orionis and Very-long-baseline interferometry
Washington Double Star Catalog
The Washington Double Star Catalog, or WDS, is a catalog of double stars, maintained at the United States Naval Observatory.
See S Orionis and Washington Double Star Catalog
References
Also known as S Ori, S Orionis A.