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Variable star in the constellation Orion
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
FU_Orionis
Type of eruptive variable star
In stellar evolution, an FU Orionis star (also FU Orionis object, or FUor) is a pre–main-sequence star which displays an extreme change in magnitude and
FU_Orionis_star
Constellation straddling the celestial equator
some 1100 light-years distant. Phi1 Orionis and Phi2 Orionis make up the base. Also nearby is the young star FU Orionis. Stretching north from Betelgeuse
Orion_(constellation)
Type of variable stars
a metal that usually is destroyed by the nuclear fusion in the stars. FU Orionis stars or simply "Fuors", are Orion variables that rise 5–6 magnitudes
Orion_variable
FU Orionis-type star in the constellation Orionis
classes of pre-main-sequence star, FU Orionis (FUor) and EX Lupi (EXor). Studies have revealed that V1647 Orionis is a young stellar object, presumably
V1647_Orionis
Vmax = 9.60m, Vmin = 9.70m, P = 0.65 d FU Ori FU 05h 45m 22.36s +09° 04′ 12.4″ 9.60 F0Iab prototype FU Orionis star BF Ori BF 26403 05h 37m 13.26s −06° 35′ 00
List_of_stars_in_Orion
Protostar in the Orion constellation
Orionis' disc. Artist's impression of the planet-forming disc around V883 Orionis Informative video about the planet-forming disc around V883 Orionis
V883_Orionis
Star in the constellation Cygnus
constellation of Cygnus. It is a variable star of the FU Orionis-type, and was the second FU Orionis-type variable to be discovered. The system is located
V1057_Cygni
Loneliest star in the Milky Way
followed by Pipe Nebula and Corona Australis Molecular Cloud). CX330 is a FU Orionis-type protostar undergoing episodic accretion outbursts, making it a unique
CX330
Star in the constellation Canis Major
separated by about 250 astronomical units (AU). The southeast component is an FU Orionis star (a type of pre-main-sequence star in a phase of very high mass accretion
Z_Canis_Majoris
Star in the constellation Taurus
(2014). "Spectral Energy Distribution Analysis of Class I and Class II FU Orionis Stars". The Astronomical Journal. 147 (6): 140. arXiv:1402.3240. Bibcode:2014AJ
L1551_IRS_5
Constellation in the southern celestial hemisphere
system a mere 300,000 years old composed of two pre-main-sequence stars—a FU Orionis star and a Herbig Ae/Be star, which has brightened episodically by two
Canis_Major
Star in the constellation Taurus
Audard, Marc (2006). "X-ray Emission from the Pre-Main Sequence Systems FU Orionis and T Tauri". Astrophysics and Space Science. 304 (1–4): 165. Bibcode:2006Ap&SS
FU_Tauri
Natural physical entity in space
Beta Cephei Alpha Cygni RV Tauri Eruptive variables Flare stars T Tauri FU Orionis RCr Borealis Luminous blue Cataclysmic Symbiotics Micronova Dwarf nova
Astronomical_object
Round grain found in chondrites, stony meteorites
Impacts between molten planetesimals Meteor ablation Hot inner nebula FU Orionis-type outburst of the early sun Energetic bipolar-shaped outflows Nebular
Chondrule
Types of planet by chemical mass
existence is not proven, but is believed by some to exist. Planet Nine, FU Orionis Ab Protoplanet A large planetary embryo that originates within protoplanetary
List_of_planet_types
Overview of the scientific field of astronomy
Hayashi track Hayashi limit Henyey track Orion variable T Tauri star FU Orionis star Herbig Ae/Be Luminosity class Subdwarf star Dwarf star Blue dwarf
Outline_of_astronomy
Star whose brightness fluctuates, as seen from Earth
particularly extreme example is UX Orionis, which is the prototype of "UXORs"; these protostars vary by 2 to 3 magnitudes. FU Orionis variables A small fraction
Variable_star
Named after Joseph Algernon Pearce. Persson's Star is V733 Cephei, an FU Orionis type object. Named after R. Persson. Piazzi's Flying Star, see Bessel's
Stars_named_after_people
Young stellar object in the constellation Auriga
directly, not via a reflection. Holoea is similar to L1551 IRS 5, an FU Orionis star. It has a large circumstellar disk that extends from 24.5±0.15 au
Holoea
British diver
in astrophysics at the Institute of Astronomy Cambridge, researching FU Orionis. While an undergraduate at the University of Southampton she spent a year
Stacie_Powell
spacecraft UXOR – (celestial object) UX ORionis objects, a class of variable pre–main sequence stars named after UX Orionis, the archetype for the class UZC
List_of_astronomy_acronyms
American astrophysicist
spectra of FU Orionis objects. Aside from explaining many details in the spectra of FUors, observations of the size of the disk in FU Orionis match model
Scott_Jay_Kenyon
Elbakyan, Vardan (23 January 2024). "On the origin of accretion bursts in FU Ori". Monthly Notices of the Royal Astronomical Society. 528 (2): 2182–2198
List_of_exoplanet_extremes
Interstellar cloud in Orion
lower right part of the image is FU Orionis. The star HD 34989 is surrounded by material that is part of the Lambda Orionis Ring. The images of this region
Sh_2-264
Type of variable star
oscillations White dwarf Eruptive Protostar and PMS Herbig Ae/Be Orion FU Orionis T Tauri Giants and supergiants Luminous blue variable R Coronae Borealis
Rapidly_oscillating_Ap_star
American astronomer (1920–2013)
Herbig Ae/Be stars Herbig–Haro objects "High-Resolution Spectroscopy of FU Orionis Stars", ApJ 595 (2003) 384–411 "The Young Cluster IC 5146", AJ 123 (2002)
George_Herbig
Nebula
V1647 Ori, a pre-main sequence star, experienced an outburst called a FU Orionis or EX Lupii type event. Most stars are believed to undergo such events
McNeil's_Nebula
Star-forming regions in the constellation Cassiopeia
50", equivalent to 0.2 parsecs, lies a fainter second object, RNO1B, a FU Orionis variable, correlated with another star of the same type, RNO1C, with which
Star-forming regions of Cassiopeia
Star-forming_regions_of_Cassiopeia
Binary star system in the constellation Orion
Nu Orionis (ν Orionis) is a binary star system in the northeastern part of the constellation Orion. It should not be confused with the variable star NU
Nu_Orionis
T-Tauri star
variability of 1–2 magnitudes due to variations in the rate of accretion. FU Orionis star Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early
EX_Lupi
Star in the constellation Orion
Tau Orionis (τ Ori, τ Orionis) is a binary star in the constellation Orion. If an imaginary line is drawn north-west between the stars Rigel and Mintaka
Tau_Orionis
Hypothetical formation of planetesimals
recondensation of water could occur over a broader region following an FU Orionis event. At greater distances the growth of solids could again be limited
Streaming_instability
Dark nebula in the constellation Camelopardalis
supposition that the source was associated with a young EX Lupi star or a FU Orionis star, whose main characteristic is precisely a sudden increase in luminosity
Camelopardalis_dark_region
FLUKA FOMP FP420 experiment FRS Fragment Separator FTCS scheme FUTBOLIN FU Orionis star Fabiola Gianotti Fabrication and testing of optical components Fabry–Pérot
Index_of_physics_articles_(F)
Binary star system in the constellation Orion
Xi Orionis (ξ Orionis) is a binary star system in the northeastern part of the constellation of Orion, well above the red giant star Betelgeuse in the
Xi_Orionis
Variable star in the constellation Orion
a result of its rapid rotation, Omega Orionis is a Be class star. Among the stars of this class, Omega Orionis was the first where the magnetic field
Omega_Orionis
Spectroscopic binary star system in the constellation Orion
Pi5 Orionis (π5 Ori, π5 Orionis) is a binary star system in the constellation Orion. It has an apparent visual magnitude of 3.69, which is bright enough
Pi5_Orionis
Binary star system in the constellation Orion
Pi4 Orionis (π4 Ori, π4 Orionis) is a binary star system in the western part of the Orion constellation. It is visible to the naked eye with an apparent
Pi4_Orionis
Binary star system in the constellation Orion
Phi1 Orionis is a binary star system in the constellation Orion, positioned less than a degree to the south of Meissa. It is visible to the naked eye
Phi1_Orionis
Star in the constellation Orion
Omicron2 Orionis (ο2 Ori) is a solitary star in the constellation Orion. It has an apparent visual magnitude of 4.06, which is bright enough to be seen
Omicron2_Orionis
Binary star system in the constellation Orion
Omicron1 Orionis (ο1 Ori) is a binary star in the northeastern corner of the constellation Orion. It is visible to the naked eye with an apparent visual
Omicron1_Orionis
Star in the constellation Orion
Pi6 Orionis (π6 Ori, π6 Orionis) is a solitary star in the eastern part of the constellation Orion. It is visible to the naked eye with an apparent visual
Pi6_Orionis
University Press. p. 170. ISBN 0-521-44921-9. Kaler, James B. "Saiph (Kappa Orionis)". Stars. University of Illinois. Archived from the original on 2012-02-02
List_of_proper_names_of_stars
Star in the constellation Orion
Phi2 Orionis is a star in the constellation Orion, where it forms a small triangle on the celestial sphere with the nearby Meissa and Phi1 Orionis. This
Phi2_Orionis
Star in the constellation Orion
Pi1 Orionis (π1 Ori, π1 Orionis) is a star in the equatorial constellation of Orion. It is faintly visible to the naked eye with an apparent visual magnitude
Pi1_Orionis
Planet not gravitationally bound to a star
Zapatero Osorio et al. discovered iPMOs with Keck spectroscopy in the σ Orionis cluster. The spectroscopy of the objects in the Orion Nebula was published
Rogue_planet
Spectroscopic binary system in the constellation of Orion
Psi2 Orionis a binary star system in the equatorial constellation of Orion. It has an apparent visual magnitude of 4.6, indicating that it is visible
Psi2_Orionis
Star in the constellation Orion
Pi2 Orionis (π2 Ori, π2 Orionis) is the Bayer designation for a solitary star in the equatorial constellation of Orion. Although the Bright Star Catalogue
Pi2_Orionis
32965 06h 51m 59.23s −01° 38′ 40.4″ 8.99 1.69 1489 A4p Brewer's Star FU Mon FU 44544 30301 06h 22m 23.85s +03° 25′ 27.9″ 9.06 2490 S6.5/7.5 semiregular
List_of_stars_in_Monoceros
; Jayawardhana, R. (2002-11-01). "Direct detection of the companion of Orionis". Astronomy & Astrophysics. 394 (3): L43–L46. arXiv:astro-ph/0209404. doi:10
List of nearest stars by spectral type
List_of_nearest_stars_by_spectral_type
Large self-illuminated object in space
Michelson, A. A.; Pease, F. G. (1921). "Measurement of the diameter of Alpha Orionis with the interferometer". Astrophysical Journal. 53 (5): 249–259. Bibcode:1921ApJ
Star
List of largest planets by size
2011). "Spectroscopy of very low mass stars and brown dwarfs in the Lambda Orionis star forming region. I. Enlarging the census down to the planetary mass
List_of_largest_exoplanets
0.5 G 11.72 Has 1 confirmed exoplanet (Kepler-78b). Betelgeuse (Alpha Orionis) A 408 – 548+90 −49 Orion M1–M2 Ia–ab +0.50 The closest red supergiant
List of star systems within 400–450 light-years
List_of_star_systems_within_400–450_light-years
Exoplanets confirmed or discovered from direct imaging
objects really isolated?. A brown dwarf-exoplanet system candidate in the σ Orionis cluster". Astronomy and Astrophysics. 460 (2): 635–640. arXiv:astro-ph/0608659
List of directly imaged exoplanets
List_of_directly_imaged_exoplanets
Unique identifier given to variable stars
the constellation name (e.g. Centaurus becomes Centauri, Orion becomes Orionis) to get the star name. In the early 19th century few variable stars were
Variable-star_designation
Substellar object
The HH 1165 jet launched by the brown dwarf Mayrit 1701117 in the outer periphery of the sigma Orionis cluster
Brown_dwarf
Young binary star system in the constellation Auriga
major dimming event started. The companion star is itself a variable of UX Orionis type, exhibiting both chaotic variations of brightness and short (less
RW_Aurigae
Intermediate-mass Stars. XXXVII. Uncovering a 0.53M⊙, 0.75 au Companion to h Orionis". Research Notes of the American Astronomical Society. 10 (5): 125. Bibcode:2026RNAAS
List_of_smallest_known_stars
List from the Alphabet Direction (αβ)
star clusters) — César Briceño (for example: Briceno 1 at the star 25 Orionis) BRHT — Bhatia-Read-Hatzidimitriou-Tritton Brosch — Noah Brosch (open star
List of astronomical catalogues
List_of_astronomical_catalogues
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