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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
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
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
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
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
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
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
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
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
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)
astronomy Stellar atmosphere Stellar birthline Stellar black hole Stellar cartography Stellar chemistry Stellar chonography Stellar classification Stellar cluster
List_of_stellar_properties
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
Topics referred to by the same term
an effect in transistor physics Early, a synonym for hotter in stellar classification Search for "early" on Wikipedia. All pages with titles beginning
Early
Multiple-star system in the constellation of Perseus
designated component A, is an orange-hued (K–type) bright giant with a stellar classification of K1II. The star is around 50 million years old with 6.8 times
58_Persei
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
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
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_Grace_Roman
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
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
Topics referred to by the same term
Yellow star may refer to: A yellow star in stellar classification A yellow badge, a cloth patch that Jews were ordered to wear on their clothes Any plant
Yellow_star
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
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
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)
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
Star in the constellation Libra
The primary, component A, is a B-type main sequence star with a stellar classification of B2.5 V. It is estimated to hold more than seven times the mass
Tau_Librae
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
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 Cetus
Circular Celestial Granary. This is an aging giant star with a stellar classification of K1 III, having exhausted the supply of hydrogen at its core and
75_Ceti
Double star in the constellation Andromeda
parallax shift of 4.95 mas, it is located 659 light years away. The stellar classification of 45 And is B7 III-IV, matching an evolving subgiant/giant star
45_Andromedae
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
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
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
spectral classification scheme is a two-dimensional classification based on temperature and luminosity. stellar designation stellar dynamics stellar envelope
Glossary_of_astronomy
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
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
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
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
Orange-hued star in the constellation Pegasus
234″ yr−1. This is an ordinary K-type main sequence star with a stellar classification of K2V. The age of the star is poorly constrained, but is estimated
BD+14_4559
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 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
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 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 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
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
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
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
Star in the constellation Ursa Minor
drifting further closer with a radial velocity of about –13 km/s. The stellar classification of Zeta UMi is A3Vn, a notation that indicates this is an A-type
Zeta_Ursae_Minoris
Star in the constellation Cassiopeia
around 711,700 years. This is a K-type main-sequence star with a stellar classification of K0.5V. Low-level chromospheric activity has been detected, with
HD_7924
Lithuanian astronomer (1936–2021)
seven-color intermediate band system, optimized for photometric stellar classification. In 1996 he was elected a Corresponding Member of the Lithuanian
Vytautas_Straižys
Star in the constellation Aquarius
velocity of 40 km/s. This object is an aging G-type giant star with a stellar classification of G8 III, although Houk and Swift (1999) found a class of K1 IV
30_Aquarii
Binary star in the constellation Aries
with a stellar classification of F8 IV. The secondary star, component B, is a magnitude 7.95 F-type main-sequence star with a stellar classification of F9 V
10_Arietis
stellar astronomy 1200 BC — Chinese star names appear on oracle bones used for divination. 134 BC — Hipparchus creates the magnitude scale of stellar
Timeline_of_stellar_astronomy
Star in the constellation Columba
trajectories radial to the point of intersection. Mu Columbae has a stellar classification of O9.5 V, presenting as a massive O-type main-sequence star. It
Mu_Columbae
American astronomer (1911–2007)
American astronomer who is known for her work on the Yerkes system of stellar classification, also called the MKK system. Kellman was born in Walworth, Wisconsin
Edith_Kellman
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 Lacerta
−4.5 km/s. This is an ordinary A-type main-sequence star with a stellar classification of A1 V, which indicates it is generating energy through hydrogen
Alpha_Lacertae
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
Binary star in the constellation Andromeda
is a B-type main sequence star with a stellar classification of B5 V. The fainter secondary has a classification of F8 V, which makes it an F-type main
Nu_Andromedae
Topics referred to by the same term
specific G-4 or G-6), a relatively poor grade of collectable coin G, a stellar classification for yellowish stars G, part of a provisional designation in astronomy
G_(disambiguation)
Star in the constellation Aquila
separate and unrelated object. The spectrum of ν Aql A matches a stellar classification of F3, with the luminosity class of Ib indicating this is a supergiant
Nu_Aquilae
Star in the constellation Centaurus
star with 8.2 times the mass of the Sun. The spectrum matches a stellar classification of B1 III, indicating this is an evolved giant star. It is radiating
Epsilon_Centauri
Star in the constellation Boötes
orbiting this star in 2018. This is an evolving red giant star with a stellar classification of G4 III-IV Fe-1, with the notation indicating the spectrum shows
24_Boötis
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 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
Star in the constellation Taurus
Asterope is a blue-white hued B-type main sequence star with a stellar classification of B8 V. It is a single star with around three times the mass of
Asterope_(star)
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
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
Binary stellar systems in the constellation Monoceros
70,000 years ago in a stellar encounter, and dubbed it Scholz's Star. The primary is a red dwarf with a stellar classification of M9±1 and 86±2 Jupiter
Scholz's_Star
Peculiar star in the constellation Cassiopeia
association of co-moving stars. This is a massive O-type star with a stellar classification of O4–8f?p. It has around 42 times the mass of the Sun and 19 times
HD_108
Star in the constellation Taurus
is drifting further away with a radial velocity of +17 km/s. The stellar classification for this object is K7Ve, matching a K-type main-sequence star that
AA_Tauri
Binary star in the constellation Crux
two F-type main-sequence stars with similar masses and a matching stellar classification of F5 V. Their orbital period is less than 100 days. A distant circumbinary
HD_106906
Star in the constellation Apus
2 million years ago. It has an absolute magnitude of 5.75. The stellar classification of HD 137388 is K2IV, matching that of an evolving subgiant star
HD_137388
Single star in the constellation Pegasus
of −8 km/s. This object is an A-type main-sequence star with a stellar classification of A2V. It is 448 million years old with a high rate of spin, with
Theta_Pegasi
Red dwarf in constellation of Draco
magnitude of 11.06. This is an M-type main-sequence star with a stellar classification of M1.5V. It is spinning slowly with a rotation period of roughly
Gliese_625
Star in the constellation Serpens
constellation Serpens and has a below naked-eye visual magnitude of 9.69. A stellar classification of K7 Vk means it is a small main-sequence star mostly generating
Gliese_710
Star in the constellation Lynx
of 8.58, it is too faint to be seen with the naked eye. It has a stellar classification of K3V, which classifies it as a main sequence star (like the Sun)
HD_48948
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 in the constellation Hydra
magnitude of 10.07. This is a small M-type main-sequence star with a stellar classification of M2V. It is an older star with a rotation period of roughly 73 days
Gliese_433
Topics referred to by the same term
Y-chromosomal Adam and Haplogroup A (Y-DNA) A0, a subdivision in stellar classification Non-breaking space, which has hexadecimal representation A0 (sometimes
A0
Type of variable star
relatively high space velocity and low luminosities for stars of their stellar classification. These properties distinguish the SX Phoenicis variables from their
SX_Phoenicis_variable
Variable star
occulted by the moon and planets. This is a G-type giant star with a stellar classification of G6/8III. With an estimated age of 282 million years, it is an
Omega2_Scorpii
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)
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
Topics referred to by the same term
Baseband processor, a device in a network interface Bp star, a stellar classification Before Present, a time scale used in science with "Present" being
BP_(disambiguation)
Star in the constellation Delphinus
moving closer to the Sun with a radial velocity of −19 km/s. With a stellar classification of B6 III or B6IV, it presents as an aging giant or subgiant star
Epsilon_Delphini
Star in the constellation Cetus
group of co-moving stars. This is an aging red giant star with a stellar classification of M1 III, currently on the asymptotic giant branch. In 1959, Alan
7_Ceti
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
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
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
Star in the constellation Dorado
2391 supercluster. This is an F-type main-sequence star with a stellar classification of F1V. It is a pulsating variable that varies in brightness by
Gamma_Doradus
Star in the constellation Draco
spectrum of HD 176693 matches an F-type main-sequence star with a stellar classification of F8V. The star is older than the Sun, at 7.15 billion years. It
HD_176693
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
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 Ophiuchus
solar masses. The mass of the secondary suggests that it has a stellar classification in the range K5V to K7V, which indicates it is a main sequence star
Alpha_Ophiuchi
Star in the constellation Hercules
away in around 328,000 years. This is an aging giant star with a stellar classification of K2IIIab. It is a red clump giant, meaning it is on the horizontal
109_Herculis
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
Star in the constellation Apus
it toward the south celestial pole. This is a giant star with a stellar classification of K3IIICN0.5, indicating that this star has consumed the hydrogen
Alpha_Apodis
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 five
Stellar_black_hole
Star in the constellation Pisces
has an absolute magnitude of 0.62. An evolved red giant with a stellar classification K0 III, the star has moved off the main sequence by cooling and
HD_6
Star in the constellation Hercules
velocity of 10 km/s. This is a G-type main-sequence star with a stellar classification of G0. It has 1.15 times the mass and 1.43 times the girth of the
HD_152843
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STELLAR CLASSIFICATION
STELLAR CLASSIFICATION
STELLAR CLASSIFICATION
STELLAR CLASSIFICATION
STELLAR CLASSIFICATION
STELLAR CLASSIFICATION
STELLAR CLASSIFICATION
STELLAR CLASSIFICATION
STELLAR CLASSIFICATION
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