Bellerophon (51 Pegasi b, P13) is a planet that orbits the star 51 Pegasi, located in the constellation Pegasus in the caelregio Testudo 51 light-years away from us. It is notable for being the first planet discovered around an ordinary star, and is the first hot Jupiter found. 51 Pegasi b (abbreviated 51 Peg b), unofficially dubbed Bellerophon / b ɛ ˈ l ɛr ə f ɒ n /, later formally named Dimidium / d ɪ ˈ m ɪ d i ə m /, is an extrasolar planet approximately 50 light-years away in the constellation of Pegasus.It was the first exoplanet to be discovered orbiting a main-sequence star, the Sun-like 51 Pegasi, and marked a breakthrough in astronomical research. Helvetios Radius. 51 Pegasi b was the first, but now we know thousands of exoplanets. SUBSCRIBE https://goo.gl/PLLFPz Learn about the first planet ever discovered around a star like our Sun. 51 Pegasi is a yellow-orange main sequence dwarf star of spectral and luminosity type G4-5 Va, but it had been previously classified as G2-2.5 and sometimes as a subgiant (IV). However, as per the latest reports, the said planet is a gas giant. Its discovery was publicly announced on 1995. 10) 51 Pegasi b probably has a greater radius than that of Jupiter despite its lower mass. 51 Peg b; Alternative planet names: Bellerophon, TYC 1717-2193-1 b, Helvetios b, GJ 882 b, Gaia DR2 2835207319109249920 b, HIP 113357 b, HD 217014 b: Description: 51 Pegasi is a Sun-like star in the constellation Pegasus. As of 2019, astronomers have discovered more than 4,000 exoplanets . The results suggest that 51Peg b may be an inflated hot Jupiter with a high albedo (e.g., an albedo of 0.5 yields a radius of 1.9 ± 0.3 R Jup for a signal amplitude of 6.0 ± 0.4 × 10 -5 ). 9) Moreover, it was originally thought that 51 Pegasi b was the displaced core of a decomposed star and was made of heavy elements. The planet is also called Bellerophon. Di bawahnya, gas-gas yang menyusun planet akan sangat panas sehingga planet akan berpendar merah. The figure of 1.51 that I have given is based on the value in the Simbad Hipparcos Extended Catalogue at the University of Strasbourg from 2012. 51 Pegasi b mungkin memiliki radius yang lebih besar daripada Jupiter meskipun dengan massa yang lebih kecil. The parent star is similar to our Sun but it is a little more massive, bigger, brighter, and cooler. The International Astronomical Union gives the example of 51 Pegasi b, which corresponds to the first planet discovered around 51 Pegasi, which is a star in the constellation Pegasus. The Sun's radius is 695,800km, therefore the star's radius is an estimated 834,202.69.km. But 51 Pegasi b … Hal ini disebabkan atmosfernya yang sangat terpanaskan membengkak menjadi lapisan yang tebal tetapi dengan kerapatan yang rendah. The host star 51 Peg has apparent magnitude of 5.5, with absolute magnitude of 4.7. 51 Peg b; 51 Peg b is an exoplanet orbiting the star 51 Peg, located about 47.9 light-years (14.7 pc) away from Solar System. Helvetios estimated radius has been calculated as being 1.20 times bigger than the Sun. It’s not entirely clear how large 51 Pegasi b is; Open Exoplanet Catalogue indicates a radius of 1.6 R[math]_{J}[/math] [1] (Jupiter radii), whereas The Extrasolar Planet Encyclopaedia indicates a radius of 1.9 ± 0.3 R[math]_{J}[/math] [2]. It is 1.1 times more massive and 1.3 times bigger compared with our Sun. Sun but it is a gas giant the Sun 's radius is an estimated.! Its lower mass, therefore the star 's radius is 695,800km, the! 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