What is the definition of a G2 star?

1 Answer
Jan 31, 2016

From the hottest to coolest (O B A F G K M) classification, G is yellowish orange (5th of 7) Temperature-related categories. 0 - 9 is an improved classification. An associated class is G2.


Illustrative example: For G2, surface-temperature range is 5500 deg K - 10000 deg K.Sun is of spectral class G2V. The Roman five V is for luminosity characteristic, from the ratings I II III IV V. Luminosity unit L = 1 is against 385 E+26 watts.of Sun..