sun is classified as g2v type of star.
sun is classified as g2v type of star.
sun is classified as what type of star?
g2v
a g-type main-sequence star (spectral type: g-v), often (and imprecisely) called a yellow dwarf, or g dwarf star, is a main-sequence star (luminosity class v) of spectral type g. such a star has about 0.84 to 1.15 solar masses and surface temperature of between 5,300 and 6,000 k. like other main-sequence stars, a g-type main-sequence star is converting the element hydrogen to helium in its core by means of nuclear fusion. the sun, the star to which the earth is gravitationally bound in the solar system and the object with the largest apparent magnitude, is an example of a g-type main-sequence star (g2v type). each second, the sun fuses approximately 600 million tons of hydrogen to helium, converting about 4 million tons of matter to energy. besides the sun, other well-known examples of g-type main-sequence stars include alpha centauri a, tau ceti, and 51 pegasi.
g-type main-sequence star
ty pyxidis is an eclipsing binary star whose apparent magnitude ranges from 6.85 to 7.5 over 3.2 days. the two components are both of spectral type g5iv with a diameter 2.2 times, and mass 1.2 times that of the sun, and revolve around each other every 3.2 days. the system is classified as a rs canum venaticorum variable, a binary system with prominent starspot activity, and lies 184 ± 5 light-years away. the system emits x-rays, and analysing the emission curve over time led researchers to conclude that there was a loop of material arcing between the two stars. rz pyxidis is another eclipsing binary system, made up of two young stars less than 200,000 years old. both are hot blue-white stars of spectral type b7v and are around 2.5 times the size of the sun. one is around five times as luminous as the sun and the other around four times as luminous. the system is classified as a beta lyrae variable, the apparent magnitude varying from 8.83 to 9.72 over 0.66 days. xx pyxidis is one of the more-studied members of a class of stars known as delta scuti variables—short period (six hours at most) pulsating stars that have been used as standard candles and as subjects to study astroseismology. astronomers made more sense of its pulsations when it became clear that it is also a binary star system. the main star is a white main sequence star of spectral type a4v that is around 1.85 ± 0.05 times as massive as the sun. its companion is most likely a red dwarf of spectral type m3v, around 0.3 times as massive as the sun. the two are very close—possibly only 3 times the diameter of the sun between them—and orbit each other every 1.15 days. the brighter star is deformed into an egg shape.
pyxis