G1.5 B Star: Characteristics, Metallicity & Habitability | Astronomy Explained

G1.5 B is a type of star that falls under the G spectral class. G-class stars are yellow-white in color and are often referred to as "yellow dwarfs." They have surface temperatures ranging from 5,000 to 6,000 Kelvin and are slightly cooler than G1 stars. \n\nG1.5 B stars are slightly cooler and less massive than G1 stars. They have a higher metallicity, which means they contain a greater proportion of elements heavier than hydrogen and helium. This higher metallicity can indicate the presence of rocky planets, making G1.5 B stars potential candidates for hosting habitable worlds. \n\nIt is important to note that the designation "G1.5 B" is not a commonly used classification for stars. The spectral classification system typically uses whole numbers to identify spectral types, such as G1 or G2. The addition of a decimal point and a fractional number (e.g., G1.5) is not standard and may refer to a hypothetical or theoretical star.