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Within the 'W' asterism formed by Cassiopeia's five major stars lies Cassiopeia A (Cas A). It is the remnant of a supernova that took place approximately 300 years ago (as observed now from Earth; it is 10,000 light-years away), [40] and has the distinction of being the strongest radio source observable outside the Solar System.
This is the list of notable stars in the constellation Cassiopeia, sorted by decreasing brightness. Name B F Var HD HIP RA Dec vis. ... has 5-6 planets: HR 9059: V1022:
Epsilon Cassiopeiae or ε Cassiopeiae, officially named Segin (/ ˈ s ɛ ɡ ɪ n /), [10] [11] is a single [12] star in the northern constellation of Cassiopeia.With an apparent visual magnitude of 3.4, this is one of the brightest stars in the constellation.
For hypothetical planets in a circular orbit around the individual members of this star system, this maximum orbital radius is computed to be 9.5 AU for the primary and 7.1 AU for the secondary. (Note that the orbit of Mars is 1.5 AU from the Sun.) A planet orbiting outside of both stars would need to be at least 235 AU distant. [24]
Rho Cassiopeiae (/ ˌ r oʊ k æ s i ə ˈ p iː aɪ,-s i oʊ-,-iː /; ρ Cas, ρ Cassiopeiae) is a yellow hypergiant star in the constellation Cassiopeia.It is about 8,150 light-years (2,500 pc) from Earth, yet can still be seen by the naked eye as it is over 300,000 times brighter than the Sun.
HD 219134 (also known as Gliese 892 or HR 8832) is a main-sequence star in the constellation of Cassiopeia. It is smaller and less luminous than the Sun, with a spectral class of K3V, which makes it an orange-hued star. HD 219134 is relatively close to our system, with an estimated distance of 21.34 light years.
Upsilon 2 Cassiopeiae, Latinised from υ 2 Cassiopeiae, is a solitary star in the constellation of Cassiopeia, a few degrees to the south of Gamma Cassiopeiae.It has the proper name Castula / ˈ k æ s t j ʊ l ə /, which has been officially adopted by the IAU. [7]
Kappa Cassiopeiae and its bow shock. Spitzer infrared image (NASA/JPL-Caltech). Kappa Cassiopeiae (κ Cas, κ Cassiopeiae) is a star in the constellation Cassiopeia.. κ Cassiopeiae has an unusual spectrum that has anomalously weak nitrogen lines, taken as an actual nitrogen deficiency in the atmosphere.