September 3, 2020

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Its traditional name, Menkib, means “the shoulder” in Arabic. is the third brightest star in the constellation. Majaess D.; Turner D.; Lane D.; Krajci T. "Parallaxes and proper motions for 20 open clusters as based on the new Hipparcos catalogue", Deep Infrared ZAMS Fits to Benchmark Open Clusters Hosting delta Scuti Stars, https://simple.wikipedia.org/w/index.php?title=Alpha_Persei_Cluster&oldid=6692902, Creative Commons Attribution/Share-Alike License. But in the past there had been some debate over its status as a cluster, hence the titles "association" and "group" used to describe it. These types are designated, in order of decreasing temperature, by the letters O, B, A, F, G, K, and M. A yellow supergiant F star, However, the stars are identified as types B to G, which means the coolest is yellow in color. Also designated as Melotte 20 (Mel 20), it's now generally accepted as a true open cluster. To the naked eye, the cluster consists of several blue spectral type B type stars. It is the brightest star in the Perseus constellation. X Persei: This a binary star system. With an effective temperature of 6,350 K, it is about 5,000 times more luminous than the Sun. [1][2], Since the distance by the independent analyses agree, the cluster is an important rung on the cosmic distance ladder. Algol . Rho Persei is classified as a semiregular Mu Cephei type variable star. The estimated age of the cluster is between 50 and 70 million years. It is notable for being home to supernova SN 2006gy, a supernova event in 2006 that was the second brightest object ever recorded. 3.39), Miram (Eta Per, mag. Kappa Persei is a triple star system about 112 light-years away. It is an eclipsing binary that ranges in magnitude from 2.3 to 3.5 over a period of 2.9 days. 3.7/3.8), the planetary nebula Messier 76, also known as the Little Dumbbell Nebula (mag. In Hawaii, the star is known as Hinali’i. Members include Delta, Psi, Sigma, Epsilon, 29, 30, 34, and 48 Persei. It has a similar spectrum to Procyon, though the latter star is much less luminous. From an observational standpoint, the cluster is huge, spanning about three degrees, so it requires an instrument with a very wide field -- binoculars are ideal. Alpha Persei (α Per) is the brightest star in the constellation of Perseus, just outshining the constellation's best known star Algol. I have personally photographed a number of deep-sky objects in the constellation Perseus using a camera and telescope. The image below is a photograph of Mirfak from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. It is one of the 48 ancient constellations listed by the 2nd-century astronomer Ptolemy, and is part of the 88 modern constellations defined by the International Astronomical Union (IAU). Alpha Persei Cluster (Melotte 20, Collinder 39). Procyon A is thus F5 IV, a subgiantstar. The Alpha Persei Cluster (also known as Melotte 20 or Collinder 39) is an open cluster in the constellation of Perseus. [3][4], From Simple English Wikipedia, the free encyclopedia. 3.79), Nu Persei (mag. NGC 1528 includes many stars of magnitude eight and fainter. The celestial hero Perseus boarders the constellations, to the south, Auriga to the east, Cassiopeia to the north, and the, It is one of the 48 ancient constellations listed by the 2nd-century, Perseus is best spotted in the northern hemisphere’s fall and winter sky. This phrase refers to the elbow of the Pleiades. It has a surface temperature of 37,000 kelvins. It is the 24th largest constellation in the heavens. its name comes from a long Arabic phrase that means 'the elbow of the The star can be seen without binoculars. Mirfak . instrumental in defining the nature of such stars (and may be a very modest Since 1943, the spectrum of Alpha Persei has served as one of the stabl… Mirfak The most luminous member is the ~2nd magnitude white-yellow supergiant Mirfak, also known as Alpha Persei. It is an emission nebula in Perseus, about 1000 light-years distant. With an apparent magnitude of 1.806, it is the brightest star in Perseus, outshining the more famous Algol, and the 33rd brightest star in the sky. From the meteors’ trajectory, the shower appears to. The debris comes into our atmosphere at 133,200 mph (214,400 km per hour) and burns up forming the, shower. Menkib belongs to the spectral class O7.5III. The galactic plane of the Milky Way passes through Perseus but is much less obvious than elsewhere in the sky as it is mostly obscured by molecular clouds. 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