List of stars in Crux
Encyclopedia
This is the list of notable star
Star
A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...

s in the constellation
Constellation
In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....

 Crux
Crux
Crux is the smallest of the 88 modern constellations, but is one of the most distinctive. Its name is Latin for cross, and it is dominated by a cross-shaped asterism that is commonly known as the Southern Cross.-Visibility:...

, sorted by decreasing brightness.
Name B
Bayer designation
A Bayer designation is a stellar designation in which a specific star is identified by a Greek letter, followed by the genitive form of its parent constellation's Latin name...

G.
Gould designation
Gould designations for stars are similar to Flamsteed designations in the way that they number stars within a constellation in increasing order of right ascension. Each star is assigned an integer , followed by " G. " , and then the Latin genitive of the constellation it lies in...

HD
Henry Draper Catalogue
The Henry Draper Catalogue 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 , published between 1925 and 1936, which gave classifications for 46,850 more stars, and by the...

HIP RA
Right ascension
Right ascension is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. The other coordinate is the declination.-Explanation:...

Dec
Declination
In astronomy, declination is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. Declination in astronomy is comparable to geographic latitude, but projected onto the celestial sphere. Declination is measured in degrees north and...

vis.
mag.
Apparent magnitude
The apparent magnitude of a celestial body is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere...

abs.
mag.
Absolute magnitude
Absolute magnitude is the measure of a celestial object's intrinsic brightness. it is also the apparent magnitude a star would have if it were 32.6 light years away from Earth...

Dist. (ly) Sp. class
Stellar classification
In astronomy, stellar classification is a classification of stars based on their spectral characteristics. The spectral class of a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are most prominent in the light, giving an objective measure...

Notes
β Cru
Beta Crucis
Mimosa or Becrux is the second brightest star in the constellation Crux and is one of the brightest stars in the night sky....

 
β 46 111123 62434 1.25 −3.92 352 B0.5III Mimosa, Becrux; 20th brightest star; β Cep variable
Beta Cephei variable
Beta Cephei variables are variable stars which exhibit variations in their brightness due to pulsations of the stars' surfaces. The point of maximum brightness roughly corresponds to the maximum contraction of the star. Typically, Beta Cephei variables change in brightness by 0.01 to 0.3...

,
α1 Cru
Alpha Crucis
Acrux is the brightest star in the constellation Crux, the Southern Cross, and, at a combined visual magnitude 0.77, is the twelfth brightest star in the night sky...


(α Cru A)
α1 26 108248 60718 1.4 −3.6 321 B0.5IV Acrux, 23rd brightest star, multiple star
Star system
A star system or stellar system is a small number of stars which orbit each other, bound by gravitational attraction. A large number of stars bound by gravitation is generally called a star cluster or galaxy, although, broadly speaking, they are also star systems.-Binary star systems:A stellar...

, spectroscopic binary
γ Cru A
Gamma Crucis
Gamma Crucis , often called Gacrux, is a red giant star approximately 88 light-years away in the constellation of Crux. Among Portuguese-speaking peoples it is also named "Rubídea" , in reference to its color. The star is the third-brightest star in Crux and one of the brightest stars in the...

 
γ 34 108903 61084 1.59 −0.56 88 M4III Gacrux, triple star
Star system
A star system or stellar system is a small number of stars which orbit each other, bound by gravitational attraction. A large number of stars bound by gravitation is generally called a star cluster or galaxy, although, broadly speaking, they are also star systems.-Binary star systems:A stellar...

, suspected variable
Variable star
A star is classified as variable if its apparent magnitude as seen from Earth changes over time, whether the changes are due to variations in the star's actual luminosity, or to variations in the amount of the star's light that is blocked from reaching Earth...

α2 Cru
Alpha Crucis
Acrux is the brightest star in the constellation Crux, the Southern Cross, and, at a combined visual magnitude 0.77, is the twelfth brightest star in the night sky...


(α Cru B)
α2 27 108249 2.09 −2.88 321 B1V component of the α Cru system
δ Cru  δ 18 106490 59747 2.79 −2.45 364 B2IV β Cep variable;
ε Cru  ε 22 107446 60260 3.59 −0.63 228 K3/K4III suspected variable
μ1 Cru
Mu Crucis
Mu Crucis the 7th brightest starin the constellation Crux, or Southern Cross. It is awide binary of spectral class B stars, each of magnitude 4.0 and 5.1. They lie about 360−380 light years away....

 
μ1 52 112092 63003 4.03 −1.29 377 B2IV-V binary star
Binary star
A binary star is a star system consisting of two stars orbiting around their common center of mass. The brighter star is called the primary and the other is its companion star, comes, or secondary...

ζ Cru
Zeta Crucis
ζ Crucis is a binary star in the constellation Crux. It has an apparent magnitude of 4.06m. The primary star is classified as a blue-white dwarf . The secondary component is much fainter, with an apparent magnitude of 12.49. ζ Crucis is located at about 360 light-years from the Sun....

 
ζ 19 106983 60009 4.06 −1.16 361 B2.5V double star
Double star
In observational astronomy, a double star is a pair of stars that appear close to each other in the sky as seen from Earth when viewed through an optical telescope. This can happen either because the pair forms a binary star, i.e...

η Cru
Eta Crucis
η Crucis is a star in the constellation Crux. It has an apparent magnitude of 4.14m. The star is classified as a yellow-white giant . η Crucis is located at 64 light-years from the Sun....

 
η 10 105211 59072 4.14 2.67 64 F2III double star
θ1 Cru
Theta1 Crucis
θ1 Crucis is a spectroscopic binary star in the constellation Crux. It has an apparent magnitude of 4.32m. The spectral class of the star is Am. θ1 Crucis is located at 230 light-years from the Sun....

 
θ1 6 104671 58758 4.32 0.08 230 Am spectroscopic binary
45 110956 62327 4.62 −0.80 396 B3V double star
λ Cru
Lambda Crucis
Lambda Crucis is a star in theconstellation Crux. The star is classified as a blue-white dwarf . The apparent magnitude of λ Crucis is 4.6, but it is not stable. The star is a...

 
λ 51 112078 63007 4.62 −0.59 360 B4Vn β Cep variable,
ι Cru
Iota Crucis
Iota Crucis is a star in the constellation Crux. It has an apparent magnitude of 4.69m. The star is classified as an orange giant . Iota Crucis is located at 125 light-years from the Sun....

 
ι 44 110829 62268 4.69 1.78 125 K1III optical double
Double star
In observational astronomy, a double star is a pair of stars that appear close to each other in the sky as seen from Earth when viewed through an optical telescope. This can happen either because the pair forms a binary star, i.e...

θ2 Cru
Theta2 Crucis
θ2 Crucis is a spectroscopic binary star in the constellation Crux. This pair of stars complete an orbit every 3.4280 days and they have a low orbital eccentricity that is close to 0.0. θ2 Crucis is located at about 750 light-years from the Sun.The system has a combined mean apparent magnitude of...

 
θ2 7 104841 58867 4.72 −2.10 753 B2IV spectroscopic binary; β Cep variable,
α Cru
Alpha Crucis
Acrux is the brightest star in the constellation Crux, the Southern Cross, and, at a combined visual magnitude 0.77, is the twelfth brightest star in the night sky...

 C
25 108250 4.86 B4IV 25G. Cru; probable optical double with the α Cru system
CH Cru ( 39 G. Cru) 39 110335 61966 4.91 −2.60 1035 B6IV Be star
Be star
A Be star is a B-type star with prominent emission lines of hydrogen in its spectrum. The designation is combined by the spectral class, B, and the lowercase e denoting emission in the spectral classification system. Line emission from other atomic ions might be present as well, but is typically...

μ2 Cru
Mu Crucis
Mu Crucis the 7th brightest starin the constellation Crux, or Southern Cross. It is awide binary of spectral class B stars, each of magnitude 4.0 and 5.1. They lie about 360−380 light years away....

 
μ2 53 112091 63005 5.08 −0.14 361 B5Vne component of μ Cru system; γ Cas variable,
BZ Cru
BZ Crucis
BZ Crucis is a Be star in the constellation Crux, behind the southern Coalsack Nebula. It has a stellar classification of B1IVe, which means it is a...

 
40 110432 62027 5.27 −2.12 982 B2pe high-mass X-ray binary
X-ray binary
X-ray binaries are a class of binary stars that are luminous in X-rays.The X-rays are produced by matter falling from one component, called the donor to the other component, called the accretor, which is compact: a white dwarf, neutron star, or black hole.The infalling matter releases...

; γ Cas variable,
54 112244 63117 5.34 −3.47 1884 O9Ib emission-line star
24 107696 60379 5.38 0.28 342 B9V
BL Cru  29 108396 60781 5.38 −0.82 566 M4/M5III semiregular variable,
2 103961 58379 5.44 −1.00 633 B8III suspected variable
BG Cru  35 108968 61136 5.49 −3.07 1680 F5Ib-G0p 35G. Cru; Cepheid variable
Cepheid variable
A Cepheid is a member of a class of very luminous variable stars. The strong direct relationship between a Cepheid variable's luminosity and pulsation period, secures for Cepheids their status as important standard candles for establishing the Galactic and extragalactic distance scales.Cepheid...

,
1 103884 58326 5.59 −0.73 598 B3V suspected variable
3 104035 58427 5.59 −4.11 2835 A3Ib
DS Cru  47 111613 62732 5.71 −4.10 2991 A2Iab emission-line star; α Cyg variable
Alpha Cygni variable
Alpha Cygni variables are variable stars which exhibit non-radial pulsations, meaning that some portions of the stellar surface are contracting at the same time others parts expand. They are supergiant stars of spectral types B or A...

,
48 111904 62894 5.75 −4.71 4025 B9Ia suspected variable
33 108732 60969 5.78 −0.40 562 M1III suspected variable
κ Cru
HD 111973
κ Cru is a star in star cluster NGC 4755...

 
κ 50 111973 62931 5.98 −2.55 1661 B5Ia member of the Jewel Box star cluster
Star cluster
Star clusters or star clouds are groups of stars. Two types of star clusters can be distinguished: globular clusters are tight groups of hundreds of thousands of very old stars which are gravitationally bound, while open clusters, more loosely clustered groups of stars, generally contain less than...

 (note that κ Cru usually refers to the cluster itself)
15 106068 59517 5.91 −4.96 4866 B9Ia
23 107543 60308 5.91 −2.73 1743 K4III + (F)
9 104933 58921 5.95 −0.59 661 M2III suspected variable
36 109000 61158 5.96 1.62 240 A8III
42 110506 62058 5.99 0.47 414 B9Vn
28 108355 60771 6.02 −0.50 657 B8IV
30 108501 60851 6.05 1.11 317 A0Vn
41 110461 62026 6.06 0.77 372 B9V
13 105841 59396 6.08 1.34 290 F0III
32 108570 60870 6.15 3.02 138 K0/K1III
5 104430 58642 6.16 1.28 309 A1V
DL Cru
DL Crucis
DL Crucis is a variable star in the constellation Crux.-References:*...

 
17 106343 59678 6.20 6.30 ~20000 B1.5Ia α Cyg variable;
31 108530 60861 6.21 0.31 494 K2III
11 105437 59200 6.22 −2.89 2159 K3/K4II
38 109492 61443 6.22 2.89 151 G4IV
8 104900 58901 6.30 1.12 354 B9Vn
108395 60780 6.35 −0.79 874 K4III
4 104111 58469 6.36 −5.85 9022 A8II
43 110532 62084 6.41 −0.14 667 K0/K1III double star
γ Cru B
Gamma Crucis
Gamma Crucis , often called Gacrux, is a red giant star approximately 88 light-years away in the constellation of Crux. Among Portuguese-speaking peoples it is also named "Rubídea" , in reference to its color. The star is the third-brightest star in Crux and one of the brightest stars in the...

 
γ 108925 6.42 A3V component of the γ Cru system
R Cru  107805 60455 6.90 0.94 508 F7Ib/II Cepheid variable,
HD 108147
HD 108147
HD 108147 is a 7th magnitude star in the constellation of Crux in direct line with and very near to the bright star Acrux or Alpha Crucis. It is either a yellow-white or yellow dwarf , slightly brighter and more massive than our Sun. The spectral type is F8 V or G0 V...

 
108147 60644 6.99 4.05 126 F9V has a planet
Extrasolar planet
An extrasolar planet, or exoplanet, is a planet outside the Solar System. A total of such planets have been identified as of . It is now known that a substantial fraction of stars have planets, including perhaps half of all Sun-like stars...

 (b
HD 108147 b
HD 108147 b is a gas giant exoplanet with a minimum mass about half that of Jupiter. It orbits the star in a very tight "torch orbit". The distance between the planet and the star is only a tenth of the distance between Earth and the Sun . A number of such worlds are known to exist, but the...

)

See also

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