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71 Cancri ...
This is the list of notable stars in the constellation Cancer. The 121 stars are sorted by decreasing brightness, beginning with Beta Cancri, the brightest star in Cancer. See also *Lists of stars by constellation References Bibliography * * * * * * * * {{DEFAULTSORT:List of stars in Cancer *List Cancer Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body. These contrast with benign tumors, which do not spread. Possible signs and symptoms include a lump, abnormal b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Notability (astronomical Objects)
Notability is the property of being worthy of notice, having fame, or being considered to be of a high degree of interest, significance, or distinction. It also refers to the capacity to be such. Persons who are notable due to public responsibility, accomplishments, or, even, mere participation in the celebrity industry are said to have a public profile. The concept arises in the philosophy of aesthetics regarding aesthetic appraisal.Aesthetic Appraisal', Philosophy (1975), 50: 189–204, Evan Simpson There are criticisms of art galleries determining monetary valuation, or valuation so as to determine what or what not to display, being based on notability of the artist, rather than inherent quality of the art work. Notability arises in decisions on coverage questions in journalism. Marketers and newspapers may try to create notability to create celebrity, Celebrity, fame, or wikt:notoriety, notoriety, or to increase sales, as in the yellow press. The privileged class are somet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stellar Classification
In astronomy, stellar classification is the classification of stars based on their stellar spectrum, spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a Prism (optics), prism or diffraction grating into a spectrum exhibiting the Continuum (spectrum), rainbow of colors interspersed with spectral lines. Each line indicates a particular chemical element or molecule, with the line strength indicating the abundance of that element. The strengths of the different spectral lines vary mainly due to the temperature of the photosphere, although in some cases there are true abundance differences. The ''spectral class'' of a star is a short code primarily summarizing the ionization state, giving an objective measure of the photosphere's temperature. Most stars are currently classified under the Morgan–Keenan (MK) system using the letters ''O'', ''B'', ''A'', ''F'', ''G'', ''K'', and ''M'', a sequence from the hottest (''O'' type) to the coo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Omicron1 Cancri
Omicron1 Cancri, Latinised from ο1 Cancri, is a solitary, white-hued star in the zodiac constellation of Cancer. It is visible to the naked eye with an apparent visual magnitude of +5.20. Based upon an annual parallax shift of 21.87 mas as seen from Earth, this star is located around 149 light-years from the Sun. It most likely forms a co-moving pair with Omicron2 Cancri. With a stellar classification of A5 III, this appears to be an evolved, A-type giant star. At the age of about 600 million years, it has double the mass of the Sun and 1.86 times the Sun's radius. Omicron1 Cancri is radiating 13.4 times the solar luminosity from its photosphere at an effective temperature of about . Omicron1 Cancri has an infrared excess, indicating it surrounded by a circumstellar debris disk A debris disk (American English), or debris disc (Commonwealth English), is a circumstellar disk of dust and debris in orbit around a star. Sometimes these disks co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xi Cancri
Xi Cancri (ξ Cancri, abbreviated Xi Cnc, ξ Cnc) is a spectroscopic binary star system in the zodiac constellation of Cancer. It is visible to the naked eye with an apparent visual magnitude of +5.15. Based upon parallax measurements obtained during the ''Hipparcos'' mission, it is roughly 370 light-years distant from the Sun. The two components are designated Xi Cancri A (formally named Nahn ) and B. Nomenclature ''ξ Cancri'' ( Latinised to ''Xi Cancri'') is the system's Bayer designation. The designations of the two components as ''Xi Cancri A'' and ''B'' derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU). Xi Cancri together with Lambda Leonis (Alterf) were the Persian ''Nahn'', "the Nose", and the Coptic ''Piautos'', "the Eye", both lunar asterisms. ''Nahn'' was also the name given to Xi Cancri in a 1971 NASA technical memorandum. In 2016, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chi Cancri
Chi Cancri, Latinized from χ Cancri, is a candidate astrometric binary star system in the northern zodiac constellation of Cancer. It has a yellow-white hue and is dimly visible to the naked eye with an apparent visual magnitude of 5.14. The system is located at a distance of 59 light years from the Sun, based on parallax, and is drifting further away with a radial velocity of +33 km/s. It is estimated to have made its closest approach some 274,000 years ago when it came to within . The visible component of this system is an F-type main-sequence star with a stellar classification of F6V, where the luminosity class of 'V' indicates it is generating energy through core hydrogen fusion. The star is 5.8 billion years old and is spinning with a projected rotational velocity of just 4.2 km/s. It has about the same mass as the Sun but 1.4 times the Sun's radius. Chi Cancri is radiating 2.4 times the luminosity of the Sun from its photosphere at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
8 Cancri
8 Cancri is a single, white-hued star in the zodiac constellation of Cancer. It has an apparent visual magnitude of +5.14, which indicates it is faintly visible to the naked eye under suitable viewing conditions. The distance to this star, as determined from its annual parallax shift of 15.20 mas, is around 215 light years. A radial velocity of +21 km/s indicates it is moving away from the Sun. This is an A-type main-sequence star with a stellar classification of A1 V. It is a young star with an estimated age of just 144 million years, and has a high rate of spin with a projected rotational velocity of 173 km/s. 8 Cancri has 2.37 times the mass of the Sun and is radiating 36.6 times the Sun's luminosity from its photosphere at an effective temperature The effective temperature of a body such as a star or planet is the temperature of a black body that would emit the same total amount of electromagnetic radiation. Effective temperature is of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Double Star
In observational astronomy, a double star or visual double is a pair of stars that appear close to each other as viewed from Earth, especially with the aid of optical telescopes. This occurs because the pair either forms a binary star (i.e. a binary system of stars in mutual orbit, gravitationally bound to each other) or is an ''optical double'', a chance line-of-sight alignment of two stars at different distances from the observer. Binary stars are important to stellar astronomers as knowledge of their motions allows direct calculation of stellar mass and other stellar parameters. The only (possible) case of "binary star" whose two components are separately visible to the naked eye is the case of Mizar and Alcor (though actually a multiple-star system), but it is not known for sure whether Mizar and Alcor are gravitationally bound. Since the beginning of the 1780s, both professional and amateur double star observers have telescopically measured the distances and angles between d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quaternary Star
A star system or stellar system is a small number of stars that orbit each other, bound by gravitational attraction. A large group of stars bound by gravitation is generally called a ''star cluster'' or ''galaxy'', although, broadly speaking, they are also star systems. Star systems are not to be confused with planetary systems, which include planets and similar bodies (such as comets). A star system of two stars is known as a ''binary star'', ''binary star system'' or ''physical double star''. If there are no tidal effects, no perturbation from other forces, and no transfer of mass from one star to the other, such a system is stable, and both stars will trace out an elliptical orbit around the barycenter of the system indefinitely. ''(See Two-body problem)''. Examples of binary systems are Sirius, Procyon and Cygnus X-1, the last of which probably consists of a star and a black hole. Multiple star systems A multiple star system consists of three or more stars that appear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zeta Cancri
Zeta Cancri (ζ Cancri, abbreviated Zeta Cnc, ζ Cnc) is a multiple star system in the constellation of Cancer. It is approximately 83.4 light-years from Earth, and has a combined apparent magnitude of +4.67. Since it is near the ecliptic, it can be occulted by the Moon and, very rarely, by planets. The system is constituted as follows: * A binary pair designated Zeta1 Cancri or, alternatively, Zeta Cancri AB, the two components of which are themselves designated Zeta1 Cancri A or, simply, Zeta Cancri A (formally also named Tegmine , the traditional name of the Zeta Cancri system) and Zeta1/Zeta Cancri B. * A triple star system designated Zeta2 Cancri or alternatively Zeta Cancri C, consisting of a single star primary, designated Zeta2/Zeta Cancri Ca, together with a secondary binary pair, designated Zeta2/Zeta Cancri Cb. The binary pair's two components are themselves designated Zeta2/Zeta Cancri Cb1 and Cb2. Nomenclature ''ζ Cancri'' ( Latinised to ''Zeta Cancri'') is the sys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gamma Cancri
Gamma Cancri, or γ Cancri, is a star in the northern constellation of Cancer. It is formally named Asellus Borealis , the traditional name of the system. Based on parallax measurements, it is located at a distance of approximately 181 light years from the Sun. The star is drifting further away with a radial velocity of 29 km/s. In 1910 this star was reported to be a spectroscopic binary by O. J. Lee, but is now considered a single star. Since it is near the ecliptic, it can be occulted by the Moon and, very rarely, by planets. Nomenclature ''γ Cancri'' ( Latinised to ''Gamma Cancri'') is the star's Bayer designation. It bore the traditional name ''Asellus Borealis'' (Latin for "northern donkey"). In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN) to catalogue and standardize proper names for stars. The WGSN decided to attribute proper names to individual stars rather than entire multiple systems. It approved the name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alpha Cancri
Alpha Cancri (α Cancri, abbreviated Alpha Cnc, α Cnc), also named Acubens , is a star system in the constellation of Cancer. Nomenclature ''α Cancri'' ( Latinised to ''Alpha Cancri'') is the star's Bayer designation. The traditional name ''Acubens'' (Açubens) is derived from the Arabic , 'the claws'. A second name, Sertan , derives from the Arabic ''al-saraṭān'', 'the crab'. The International Astronomical Union Working Group on Star Names (WGSN) choose 'Acubens' as the proper name for this star. Properties Alpha Cancri is a fourth-magnitude star with an apparent magnitude of 4.20, making it barely visible to the naked eye under good lighting conditions. Nevertheless, it is 23 times more luminous than the Sun. Its stellar classification is given as kA7VmF0/2III/IVSr, indicating an Am star with calcium K-lines similar to an A7 main sequence star and hydrogen lines more like an F0 giant or subgiant star. The distance of Alpha Cancri calculated from the Gaia Data ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iota Cancri
Iota Cancri (ι Cnc, ι Cancri) is a double star in the constellation Cancer approximately 300 light years from Earth. The two stars of ι Cancri are separated by 30 arcseconds, changing only slowly. Although no orbit has been derived, the two stars show a large common proper motion and are assumed to be gravitationally related. The brighter star, ι Cancri A, is a yellow G-type giant with an apparent magnitude of +4.02. It is a mild barium star, thought to be formed by mass transfer of enriched material from an asymptotic giant branch star onto a less evolved companion. No such donor has been detected in the ι Cancri system, but it is assumed that there is an unseen white dwarf. The fainter of the two stars, ι Cancri B, is a white A-type main sequence dwarf with an apparent magnitude Apparent magnitude () is a measure of the brightness of a star or other astronomical object observed from Earth. An object's apparent magnitude depends on its intrinsic lumin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
