I do not care, @PZLAgencies. I only crave science (there must be a special reason for otherwise). Fine by me.

@Tallisar however, due to my lore, the lifespan will stay at 10 billion years

@Tallisar oh ok thought you were in the real scale

You are incorrect because you did not do the calculations, @PZLAgencies. I used the equation (10 * M ^ -2.5), where M is the mass of the star in solar masses. I am aware this equation is not accurate for very low or high mass stars, so I anticipated some inaccuracy. This is why I said "approximately", and not that "it is". Moreover, I did not use RSS scale. If I did use RSS scale (that is, multiply the radius by 5), then the main-sequence life expectancy would be 45.3 billion years, and its mass would be 0.5467 solar masses. With all of this being said, you are consequently wrong.
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EDIT: You said that the original expectancy is inapplicable because it does apply in the J:NO scale, however, I only used the given values which were already in J:NO scale.

@Tallisar I searched the answer myself, and got 106,000,000,000,000 years, close enough to yours. However, this doesn't apply in the Juno scale. Before that, I searched your answer and the searches said that you were incorrect for some reason

@Tallisar if you were talking about the real scale, that would probably be correct. However, I make bodies in Juno's 1/5 scale.

With the given data, the actual "life expectancy"--or in this case, the main-sequence life span--of this star would be approximately 140.9 trillion years (150 m/s2 surface gravity, 139 101 716 m radius, and 0.0219 solar masses).