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Cancer is one of the twelve constellations of the zodiac and is located in the Northern celestial hemisphere. Its name is Latin for crab and it is commonly represented as one. Cancer is a medium-size constellation with an area of 506 square degrees and its stars are rather faint, its brightest star Beta Cancri having an apparent magnitude of 3.5.
Beta Cancri (β Cancri, abbreviated Beta Cnc, β Cnc), also named Tarf / ˈ t ɑːr f /, [10] is the brightest star in the zodiacal constellation of Cancer.It has an apparent visual magnitude of +3.5 [2] and an absolute magnitude of −1.2. [6]
• HD = Henry Draper Catalogue designation number • HIP = Hipparcos Catalogue designation number • RA = Right ascension for the Epoch/Equinox J2000.0 • Dec = Declination for the Epoch/Equinox J2000.0 • vis. mag. = visual magnitude (m or m v), also known as apparent magnitude • abs. mag. = absolute magnitude (M v)
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: [1]
δ Cancri (Latinised to Delta Cancri) is the system's Bayer designation.The designations of the two constituents Delta Cancri A and B, and those of A's components - Delta Cancri Aa and Ab - derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).
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. [12]
HD 73344 is a F-type main-sequence star, a star hotter and brighter than the Sun that fuses atoms of hydrogen into helium at its core.It is 22% larger, 20% more massive [5] and 80% more luminous, [6] and its effective temperature is 448 degrees hotter, at 6,220 K (5,950 °C).
Gamma Cancri, or γ Cancri, is a star in the northern constellation of Cancer. It is formally named Asellus Borealis / ə ˈ s ɛ l ə s b ɒ r i ˈ æ l ɪ s /, the traditional name of the system. [12] Based on parallax measurements, it is located at a distance of approximately 181 light years from the Sun.