An Orion variable is a variable star which exhibits irregular and eruptive variations in its luminosity and is typically associated with diffuse nebulae...

Belt asterism. Orion also hosts the radiant of the annual Orionids, the strongest meteor shower associated with Halley's Comet, and the Orion Nebula, one...

subgroups IA (spectral types O to A) and IB (spectral types F through M). Orion variables, GCVS type IN (irregular and nebulous), indigenous to star-forming...

This is the list of notable stars in the constellation Orion, sorted by decreasing brightness. List of stars by constellation ESA (1997). "The Hipparcos...

amplitudes of several magnitudes. A well-known subtype of Orion variables are the T Tauri variables. Variability of T Tauri stars is due to spots on the stellar...

J160929.1−210524b around a K-type star PDS 70b around a K-type star Orion variable EX Lupi P Cygni profile Appenzeller, I; Mundt, R (1989). "T Tauri stars"...

there are over 52,011 known variable stars, with more being discovered regularly, so a complete list of every single variable is impossible at this place...

star system in the equatorial constellation of Orion the hunter. It is the eighth-brightest member of Orion with an apparent visual magnitude of 2.77 and...

codes were used "nebular" or "rapidly irregular" variable stars such as T Tauri and Orion variables. The remaining irregular stars, cool slowly varying...

association or the slightly older η Chamaeleontis association. T Cha is an Orion variable that fluctuates between 10.05 and 14.5. T Cha has a stellar classification...

RV Tauri variable Alpha Cygni variable Pulsating white dwarf Eruptive Pre-main sequence star Herbig Ae/Be Orion variable FU Orionis star Main Sequence...

protostar V1647 Orionis, which erupted in January 2004. Orion variable T Tauri star EX Lup variable star (also called an EXor) Clarke, C.; Lodato, G.; Melnikov...

original on 7 July 2011. Retrieved 9 March 2011. "Orion variable polarizing telescope filters". Orion Telescopes & Binoculars. Archived from the original...

a variable star by Daniel Walter Morehouse, in 1923, and received its variable star designation in 1924. It is classified as an Orion type variable star...

brighter than 10th magnitude in the region. V1073 Orionis is a B9.5 Orion variable that forms an equilateral triangle with θ2 Ori B and C. Bizarrely, θ2...

variable star. It was given its variable star designation, V640 Carinae, in 2008. The General Catalogue of Variable Stars classifies it as an Orion variable...

state. The star also appears to possess a circumstellar disk. Another Orion variable in the region is VV Serpentis, a Herbig Ae star that has been found...

varies in brightness. The General Catalogue of Variable Stars lists it as a possible hot irregular Orion variable star, but it has been shown to be a detached...

Archived from the original on 2012-02-27. Retrieved 2010-07-16. "AAVSO Website". American Association of Variable Star Observers. Retrieved 9 March 2014....

Catalogue of Variable Stars (GCVS4.2)". Retrieved 10 April 2012. Samus, N. N.; Durlevich, O. V.; et al. (2012). "General Catalog of Variable Stars (GCVS...

"General Catalog of Variable Stars (GCVS database, version 2012Apr)". Retrieved 2013-03-24. "AAVSO Website". American Association of Variable Star Observers...

V380 Ori is a young multiple star system located near the Orion Nebula in the constellation Orion, thought to be somewhere between 1 and 3 million years...

is the first bright star of Orion visible as the constellation rises. Correspondingly, it is also the first star of Orion to set in most of the Northern...

Rigel the Red Kangaroo Leader in a songline when Orion is high in the sky. The other stars of Orion are his ceremonial tools and entourage. Betelgeuse...

Archived from the original on 2012-02-27. Retrieved 2010-07-19. "AAVSO Website". American Association of Variable Star Observers. Retrieved 9 March 2014....

probably not actively accreting, but there is evidence that the accretion is variable around IM Lupi. The young star is associated with the Lupus 2 Molecular...

Orionis (V1647 Ori) is a young stellar object visible in the constellation Orion, located about 1470 light-years from the Solar System. It is situated in...

Catalogue of Variable Stars (GCVS4.2)". Retrieved 2012-04-03. Samus, N. N.; Durlevich, O. V.; et al. (2012). "General Catalog of Variable Stars (GCVS database...

FU Orionis is a variable and binary star system in the constellation of Orion, that in 1937 rose in apparent visual magnitude from 16.5 to 9.6, and has...

The Orion molecular cloud complex (or, simply, the Orion complex) is a star-forming region with stellar ages ranging up to 12 Myr. Two giant molecular...