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Classification of stars based on spectral properties
In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is
Stellar_classification
Measurement of radiant electromagnetic power emitted by an object
reddening from the interstellar medium. In the current system of stellar classification, stars are grouped according to temperature, with the massive, very
Luminosity
Large self-illuminated object in space
classifying stars into spectral types. The modern version of the stellar classification scheme was developed by Annie J. Cannon during the early 1900s.
Star
Scatter plot of stars showing the relationship of luminosity to stellar classification
between the stars' absolute magnitudes or luminosities and their stellar classifications or effective temperatures. It is also sometimes called a color
Hertzsprung–Russell_diagram
Subfield of astronomy
1885, Edward C. Pickering undertook an ambitious program of stellar spectral classification at Harvard College Observatory, in which a team of woman computers
Astrophysics
Type of telescope
as reference points for deep-space imaging. Astrographs used for stellar classification sometimes consist of two identical telescopes on the same mount
Astrograph
Natural physical entity in space
called the main-sequence stars on the diagram. A refined scheme for stellar classification was published in 1943 by William Wilson Morgan and Philip Childs
Astronomical_object
Changes to stars over their lifespans
Stellar evolution is the process by which a star changes over the course of time. Depending on the mass of the star, its lifetime can range from a few
Stellar_evolution
American astronomer (1925–2018)
an American astronomer who made important contributions to stellar classification and stellar motions. The first female executive at NASA, Roman served
Nancy_Roman
List of astronomy acronyms Astronomical symbols Stellar classification Galaxy morphological classification List of astronomical catalogues Glossary of astronomy
List of common astronomy symbols
List_of_common_astronomy_symbols
Star that is particularly similar to the Sun
solar twins are stars that are particularly similar to the Sun. The stellar classification is a hierarchy with solar twin being most like the Sun followed
Solar_analog
spectral classification scheme is a two-dimensional classification based on temperature and luminosity. stellar designation stellar dynamics stellar envelope
Glossary_of_astronomy
American astronomer (1863–1941)
development of contemporary stellar classification. With Edward C. Pickering, she is credited with the creation of the Harvard Classification Scheme, which was
Annie_Jump_Cannon
Branch of astrophysics
Stellar dynamics is the branch of astrophysics which describes in a statistical way the collective motions of stars subject to their mutual gravity. The
Stellar_dynamics
Star in the constellation Virgo
studies have given various different values. The primary star has a stellar classification of B1III-IV. The luminosity class matches the spectrum of a star
Spica
Stellar classification distinguished by bright blue luminosity
Bibcode:1908AnHar..50....1P. Gray, C. Richard O.; Corbally, J. (2009). Stellar Spectral Classification. Princeton University Press. pp. 115–122. ISBN 978-0691125114
B-type_main-sequence_star
American astronomer (1866–1952)
She published an important early catalog of stellar spectra using her own system of stellar classification, which was later adopted by the International
Antonia_Maury
Types of planet by chemical mass
Planets in science fiction § Planet types Stellar classification Substellar object Sudarsky's gas giant classification The terms "inferior planet" and "superior
List_of_planet_types
Topics referred to by the same term
Germany The Morgan-Keenan-Kellman system, a stellar classification system also known as Yerkes spectral classification Search for "mkk" , "m-kk", "mk-k", or
MKK_(disambiguation)
Development of classes and classifications
universal medical code numbers Stellar classification in astronomy Taxonomic classification, also known as classification of species Cladistics, an approach
Taxonomy
Star in the constellation Eridanus
in the constellation Eridanus. It is a main-sequence star with a stellar classification of G6 V, and it hosts a system of three confirmed planets and a
82_G._Eridani
Star in the constellation Lyra
over time. When its resulting stellar classification enters a range known as the instability strip—typically at stellar class A—the outer envelope can
RR_Lyrae
Star in the constellation Triangulum Australe
star to evolve away from the main sequence. N. Covacs give Atria a stellar classification of K2IIb-IIIa, with the luminosity class indicating an evolutionary
Alpha_Trianguli_Australis
Variable star in the constellation Pictor
star with a visual magnitude of 5.71 and a stellar classification of B9 Ve or B9 IVn. The first classification suggests is a B-type main-sequence star,
Mu_Pictoris
Stars with a supergiant luminosity class with a spectral type of K or M
stars with a supergiant luminosity class (Yerkes class I) and a stellar classification K or M. They are the largest stars in the universe in terms of volume
Red_supergiant
Topics referred to by the same term
Y-chromosomal Adam and Haplogroup A (Y-DNA) A0, a subdivision in stellar classification A0, sometimes written as 0xA0, is the hexadecimal representation
A0
Red giant star in the constellation Sagitta
a radial velocity of −34 km/s. This is a red giant star with a stellar classification of M0 III. It is most likely (94% chance) on the red-giant branch
Gamma_Sagittae
Star in the constellation Crux
radial velocity of −4.60 km/s. This is a giant star of type K with a stellar classification of K3III, indicating that it has exhausted the hydrogen at its core
Epsilon_Crucis
South Korean ore carrier ship
Stellar Banner was a Marshallese very large ore carrier (VLOC) managed by the South Korean company Polaris Shipping. Constructed in 2016, she suffered
MV_Stellar_Banner
Stellar classification
2020–2026. Retrieved 2026-01-15. E. Mamajek (2022-04-16). "A Modern Mean Dwarf Stellar Color and Effective Temperature Sequence". Retrieved 2022-05-14. Steigerwald
K-type_main-sequence_star
Topics referred to by the same term
moving particle between successive collisions Luminosity Class L, a stellar classification Galactic longitude (l), in the galactic coordinate system Avogadro
L_(disambiguation)
typically around 6.5 apparent magnitude. The known 133 objects are bound in 95 stellar systems. Of those, 103 are main sequence stars: 78 red dwarfs and 25 "typical"
List_of_nearest_stars
Star cluster in the constellation of Taurus
Hertzsprung–Russell diagram for the cluster with theoretical models of stellar evolution. Using this technique, ages for the Pleiades of between 75 and
Pleiades
Topics referred to by the same term
for pyrrolysine an alpha amino acid in biochemistry O-type star, stellar classification for very hot bluish stars O (for Octavius, meaning an eighth of
O_(disambiguation)
Triple-star system in the constellation Scorpius
system, Gliese 667 A (GJ 667 A), is a K-type main-sequence star of stellar classification K3V. It has about 65% of the mass of the Sun and 76% of the Sun's
Gliese_667
Telescope accessory used to improve details of viewed objects
measurements which reveal objects' astrophysical properties, such as stellar classification and placement of a celestial body on its Wien curve. Most astronomical
Astronomical_filter
Topics referred to by the same term
BGCFs in different networks Morgan-Keenan (MK) spectral classification, a stellar classification system based on spectral lines Megakelvin (MK), an SI unit
MK
Star in the constellation Cancer
a member of the Beehive Cluster. This is a subgiant star with a stellar classification of G0 III. It is rotating at a relatively fast clip, giving it an
35_Cancri
SI unit of temperature
required to match "daylight" film emulsions. In astronomy, the stellar classification of stars and their place on the Hertzsprung–Russell diagram are
Kelvin
Open cluster in the constellation Auriga
dozen red giants and its hottest surviving main sequence star is of stellar classification B9 V. The abundance of elements other than hydrogen and helium,
Messier_37
Stellar classification
this particular scenario would be the more intense light and the shorter stellar lifespan of the home star. F-type stars are known to emit much higher energy
F-type_main-sequence_star
Overview of the scientific field of astronomy
System Stellar classification Stellar classification § Class G Internal structure Standard Solar Model Solar core Radiation zone Convection zone Stellar atmosphere
Outline_of_astronomy
Topics referred to by the same term
Gillette Company, ticker symbol G on the New York Stock Exchange G, a stellar classification for yellowish stars G, part of a provisional designation in astronomy
G_(disambiguation)
Brightest star in the constellation Eridanus
orbit. This appears to be an A-type star in the stellar classification range A0V–A3V, which suggests a stellar mass of about double that of the Sun. The separation
Achernar
Topics referred to by the same term
star or bluestar may refer to: O-type star (a.k.a. blue star), a stellar classification Linckia laevigata, a sea star from the Indian and West Pacific Oceans
Blue_star
Topics referred to by the same term
Officer Corps Tetraoxygen (O4), oxozone a class of stars in the stellar classification Otoyol 4, a highway from Istanbul to Ankara, Turkey Martin XO-4
O4
Stellar classification
An O-type star is a hot, blue star of spectral type O in the Yerkes classification system employed by astronomers. They have surface temperatures in excess
O-type_star
Star in the constellation Delphinus
direction of the Earth with a radial velocity of −25 km/s. The stellar classification of the visible component is A3 IVs, which matches an A-type subgiant
Eta_Delphini
astronomical research, contributing to areas such as cosmological models, stellar classification, binary stars, and nebulae. Additionally, it participates in philosophical
Demographics_of_Vatican_City
Star in the constellation Aquila
with a radial velocity of −30 km/s. This is a subgiant star with a stellar classification of A3 IV. The outer atmosphere is radiating energy into space with
Upsilon_Aquilae
Topics referred to by the same term
scientific classification system Virus classification, naming and sorting viruses Galaxy morphological classification Stellar classification Categorization
Scientific classification (disambiguation)
Scientific_classification_(disambiguation)
Team of women who processed astronomical data
activity made her famous in her own lifetime, and she produced a stellar classification system that is still in use today. Antonia Maury discerned in the
Harvard_Computers
Star in the constellation Virgo
sphere at the rate of 0.621 arc seconds per annum. This object has a stellar classification of G4 V-IV, being rather unusually bright for a main sequence star
70_Virginis
Stellar classification
and white dwarfs which are much more common, the last of which being stellar remnants). A G-type main-sequence star with the mass of the Sun will fuse
G-type_main-sequence_star
Star in the constellation Canis Minor
them as close as 8.9 AU and as far as 21.0 AU. The primary has a stellar classification of F5IV–V, indicating that it is a late-stage F-type main-sequence
Procyon
Star in the constellation Boötes
visible component is an ordinary A-type main-sequence star with a stellar classification of A0 Vs, where the 's' notation indicates "sharp" absorption lines
10_Boötis
Star in the constellation Auriga
509 light years from the Sun based on stellar parallax. This pre-main-sequence star has a stellar classification of A0Ve, matching an A-type main-sequence
AB_Aurigae
Binary star in the constellation Lupus
apparent magnitude of 3.86. It is a B-type main sequence star with a stellar classification of B9.5 Vne. The 'n' suffix indicates the spectrum shows "nebulous"
Kappa_Lupi
Brightest star in the constellation Boötes
main sequence to the red giant branch, reaching an early K-type stellar classification. It is frequently assigned the spectral type of K0III, but in 1989
Arcturus
Star in the constellation Eridanus
traversing the sky at the rate of 0.765 arcseconds per year. The stellar classification of GJ 180 is catalogued as M2V or M3V, depending on the study, which
Gliese_180
Star system in the constellation Ursa Major
The primary component of this putative system has a published stellar classification of F6 IV, indicating it is a subgiant star that is evolving away
Theta_Ursae_Majoris
Star in the constellation Libra
belong to any known stellar moving group or association. This is an M-type main-sequence star, a red dwarf, with a stellar classification of M4.0V. The chromosphere
HN_Librae
Star in the constellation Andromeda
discovered to be orbiting the star. This is a red clump giant with a stellar classification of K0 III, a star that has passed the first-giant branch and is
14_Andromedae
Binary star in the constellation Gemini
0.61. The primary component is an M-type supergiant star with a stellar classification of M2Ia or b. The companion is most likely a hotter B-type main-sequence
WY_Geminorum
Astronomical star catalogue
forth. Between 1910 and 1915, new discoveries increased interest in stellar classification, and work on the Henry Draper Catalogue itself started in 1911.
Henry_Draper_Catalogue
Star in the constellation Lyra
to the Sun with a radial velocity of −25 km/s. This star has a stellar classification of F0 IVn, suggesting it is an F-type subgiant star that is evolving
Zeta2_Lyrae
Structure of stars
Stellar structure models describe the internal structure of a star in detail and make predictions about the luminosity, the color and the future evolution
Stellar_structure
Quadruple star system in the constellation Hercules
is fairly similar to the Sun although more highly evolved with a stellar classification of G5 IV. Since 1943, the spectrum of this star has served as one
Mu_Herculis
Binary star system in the constellation Gemini
a stellar classification of K2III. It is most likely fusing helium in its core in a position on the H-R diagram called the red clump. The stellar radius
HD_59686
Red dwarf star in the constellation Dorado
thick disk star. This is a small M-type main-sequence star with a stellar classification of M3.5V. It has a relatively low activity level for a red dwarf
Gliese_163
Binary star system in the constellation Reticulum
characteristics to the Sun, so they are considered solar analogs. Their stellar classification is nearly identical to that of the Sun. ζ1 has 95% of the Sun's
Zeta_Reticuli
Star in the constellation of Hercules
primary, component A, presents as a G-type main-sequence star with a stellar classification of G2 V. It is considered an excellent solar twin candidate, although
HD_164595
light-years from Earth • Sp. class = Spectral class of the star in the stellar classification system • Notes = Common name(s) or alternate name(s); comments;
List_of_stars_in_Sagitta
Star in the constellation Ursa Major
making them a contact binary system. As a result, they have the same stellar classification of F8Vp, which matches the spectrum of a main-sequence star that
W_Ursae_Majoris
Star in the constellation Centaurus
located at a distance of around 306 light-years (94 parsecs). The stellar classification of this star is B1.5 Vne, indicating that it is a B-type main sequence
Eta_Centauri
Topics referred to by the same term
Maersk Line M-class Melbourne tram M-class Sydney tram M class, a stellar classification M class, a class of solar flare Class M (disambiguation) M type
M_class
Star in the constellation Aquila
of two intermediate-mass B-type main sequence stars; each has a stellar classification of B3 V. They are detached components, which means the two stars
Sigma_Aquilae
Quadruple star system in the constellation Auriga
circular orbit with a period of 3.7887 days. The visible member has a stellar classification of A9 IV or A V, depending on the source. In 1966, Ivan John Danziger
14_Aurigae
Star in the constellation Serpens
larger and 9% more massive than the Sun, although it has a similar stellar classification. It is shining with nearly double the Sun's luminosity and this
Lambda_Serpentis
Topics referred to by the same term
Association category Class A share, a class of stock shares Class A, a stellar classification Class A, a retired type of United States Army Service Uniform Class
Class_A
Black hole formed by a collapsed star
A stellar black hole (or stellar-mass black hole) is a black hole formed by the gravitational collapse of a star. They have masses ranging from about 5
Stellar_black_hole
Star in the constellation Aquila
component, Omicron Aquilae A, is an F-type main sequence star with a stellar classification of F8 V. It has about 125% of the mass of the Sun and 148% of the
Omicron_Aquilae
Star in the constellation Draco
is visible to the naked eye as a faint orange-hued star with a stellar classification of 5.43. Based upon an annual parallax shift of 4.16 mas as seen
7_Draconis
American astronomer (1944–2018)
recognized expert on the topic of hot, massive stars, particularly their stellar classification. Walborn served as a researcher at the Space Telescope Science Institute
Nolan_R._Walborn
Star in the Ursa Major constellation
proper motion traversing the sky at the rate of 0.381″ yr−1. The stellar classification of 61 UMa is G8V, matching a late G-type main-sequence star. Since
61_Ursae_Majoris
Star of relatively small size and low luminosity
than about 13 Jupiter masses. Chandrasekhar limit Dwarf planet Stellar classification Sub-brown dwarf Subdwarf Ultra-cool dwarf "Glossary term: Dwarf
Dwarf_star
light-years from Earth • Sp. class = Spectral class of the star in the stellar classification system • Notes = Common name(s) or alternate name(s); comments;
List_of_stars_in_Equuleus
Red giant star in the constellation Camelopardlis
radial velocity of −5 km/s. This is an evolved red giant star with a stellar classification of M0 III. It is a suspected variable star with a pulsation period
HD_36384
Hydrogen spectral series
Hydrogen spectral series Lyman series Rydberg formula Balmer jump Stellar classification Nave, C. R. (2006). "Hydrogen Spectrum". HyperPhysics. Georgia State
Balmer_series
Correlation among statistics of a star
correlation is independent of spectral type and is applicable to stellar classification main sequence types G, K, and Red giant type M. The greater the
Wilson–Bappu_effect
Binary star in the constellation Scorpius
(about 33 billion km). Antares is a red supergiant star with a stellar classification of M1.5Iab-Ib, and is indicated to be a spectral standard for that
Antares
Topics referred to by the same term
A whitish-blue class of stars in the Morgan–Keenan system; see Stellar classification Part of the provisional designation of a comet (e.g., C/1760 A1)
A_(disambiguation)
Star in the constellation Apus
absolute magnitude of −1.45. This is an aging bright giant with a stellar classification of K0.5IIbCN1, where the suffix notation indicates an anomalous
HR_6135
Star in the constellation Sagitta
radial velocity of −22 km/s. This is an evolved red giant with a stellar classification of G8 IIIa CN 0.5. The suffix notation indicates a mild overabundance
Beta_Sagittae
Star in the constellation Pisces
follow a common heading through space. This well-studied star has a stellar classification A7 V, indicating it is an A-type main-sequence star that is generating
Lambda_Piscium
Star in the constellation Ophiuchus
association of massive stars to the Sun. This is a massive Be star with a stellar classification of B2Vne, where the 'n' indicates "nebulous" lines due to rapid
Chi_Ophiuchi
Nachos Stellar classification sequence: O B A F G K M R N S Oh Be A Fine Girl/Guy, Kiss Me Right Now, Sweetheart! Revised stellar classification sequence:
List_of_mnemonics
Red giant star in the constellation Andromeda
of 1.7 billion years, this is an evolved red giant star with a stellar classification of K3- III CN0.5. The suffix notation indicates a mild enhancement
51_Andromedae
Topics referred to by the same term
effect, a concept in econometrics Late, a synonym for cooler in stellar classification All pages with titles beginning with Late All pages with titles
Late
Star in the constellation Orion
English: the First Star of Turtle Beak.) Meissa is a giant star with a stellar classification of O9 III and an apparent visible magnitude 3.54. It is an enormous
Meissa
STELLAR CLASSIFICATION
STELLAR CLASSIFICATION
Female
English
English name derived from Latin stella, STELLA means "star."
Female
Romanian
Romanian name derived from Latin stella, STELA means "star."
Surname or Lastname
English
English : nickname from Middle English snell ‘quick’, ‘lively’ + the French pejorative suffix -ard.
Girl/Female
Indian
Truly, Kind person, Beautiful
Surname or Lastname
German
German : nickname for a calm individual, variant of Still 1.English : topographic name for someone who lived by a fish trap in a river (see Still 2).German : habitational name from Still in Alsace.
Female
Esperanto
Esperanto name STELARA means "like a constellation."Â
Surname or Lastname
English
English : byname for a valiant or resolute person, from a reduced pronunciation of Middle English stalward, stalworth ‘stalwart’ (an Old English compound of stǣl ‘place’ + wierðe ‘worthy’).
Surname or Lastname
English
English : occupational name from Old French telier ‘weaver’, ‘linen-weaver’.German : variant of Tell 2 and 3.Dutch : occupational name for a teller, a marketplace official.Jewish (Ashkenazic) : either a metonymic occupational name for a dish maker or a nickname, from German Teller, Yiddish teler ‘plate’.Catalan : from a derivative of Tell 4.This name is recorded in Beverwijck in New Netherland (Albany, NY) in the mid 17th century.
Surname or Lastname
German and Jewish (Ashkenazic)
German and Jewish (Ashkenazic) : occupational name for a joiner, from a word of Slavic origin. Compare Polish Stolarz.German (Switzerland and Upper Rhine) : habitational name for someone from a place called Stolle, near Zurich (now called Stollen).English : occupational name for a stole maker, from an agent derivative of Middle English stole ‘stole’.
Girl/Female
Indian, Tamil
Loveable
Surname or Lastname
English and Scottish
English and Scottish : topographic name, a variant of Sell 1.English and Scottish : occupational name for a saddler, from Anglo-Norman French seller (Old French sellier, Latin sellarius, a derivative of sella ‘seat’, ‘saddle’).English and Scottish : metonymic occupational name for someone employed in the cellars of a great house or monastery, from Anglo-Norman French celler ‘cellar’ (Old French cellier), or a reduction of the Middle English agent derivative cellerer.English and Scottish : occupational name for a tradesman or merchant, from an agent derivative of Middle English sell(en) ‘to sell’ (Old English sellan ‘to hand over, deliver’).German : probably a habitational name from a place named Sella near Hoyerswerda.
Male
Romanian
Romanian form of Greek Stylianos, STELIAN means "pillar."
Girl/Female
Latin Spanish American French
Star.
Girl/Female
Latin Swedish American French
Star.
Girl/Female
Muslim
Truly, Kind person, Beautiful
Girl/Female
Arabic, Muslim
Little Mountain; Truly; Kind Person; Beautiful
Girl/Female
Muslim/Islamic
Truely Kind person , Beautiful
Girl/Female
Latin
From Atella.
Male
Scottish
Modern form of Scottish Eallair, ELLAR means "superior of a church cell."
Surname or Lastname
English and South German
English and South German : occupational name for a reciter, from an agent derivative of Middle English spell(en), Middle High German spellen ‘to tell or relate’. In the case of the English surname there has probably been some confusion with Spiller.German : habitational name for someone from Spelle near Rheine.Variant of Spiller 1.
STELLAR CLASSIFICATION
STELLAR CLASSIFICATION
Male
Hebrew
Variant spelling of Hebrew Gavri, GAVRIE means "man of God"Â or "warrior of God."
Girl/Female
Indian
Sunlight; Shine; Light
Girl/Female
Indian, Tamil
Strong; Bright
Boy/Male
Hindu, Indian
Soft Eshwar Stuff
Girl/Female
Hindu, Indian
Combination of Rose and Anna
Male
Swedish
Swedish pet form of Scandinavian Ludvig, LUDDE means "famous warrior."Â
Male
Arthurian
, lord of the Misty Lake.
Girl/Female
Indian
Of wide eyes
Boy/Male
Irish
One vigor.
Surname or Lastname
English and Scottish
English and Scottish : patronymic from a Middle English male personal name: in most cases probably Allen, but other possibilities include a variant of Ellis or a short form of Alexander. In some instances, it may be from a female personal name, Alise or Alice (see Allis).
STELLAR CLASSIFICATION
STELLAR CLASSIFICATION
STELLAR CLASSIFICATION
STELLAR CLASSIFICATION
STELLAR CLASSIFICATION
v. t.
To cover, or provide with, a sollar.
n.
Same as Stealer.
a.
See Stilar.
a.
Of or pertaining to Atella, in ancient Italy; as, Atellan plays; farcical; ribald.
n.
A fortune teller.
a.
Full of unpropitious stellar influences; unpropitious; ill-boding.
a.
Minutely stellate.
n.
Alt. of Shellac
a.
Consisting of, or proceeding from, the stars; stellar; stellary; as, starry light; starry flame.
n.
A wood seller.
n.
One who, or that which, shells; as, an oyster sheller; a corn sheller.
n.
The rytina; -- called also stellerine.
n.
A farcical drama performed at Atella.
n.
One who tells stories; a narrator of anecdotes,incidents, or fictitious tales; as, an amusing story-teller.
a.
Alt. of Stellary
pl.
of Stela
n.
The space or storerooms of a cellar; a cellar.
a.
Of or pertaining to stars; astral; as, a stellar figure; stellary orbs.
n.
A fortune teller.
a.
Full of stars; starry; as, stellar regions.