PSR J1719-1438 b’s surface gravity

in space


Comparison of Earth, PSR J1719-1438 b, and Jupiter

Diamond planets-specifically PSR J1719-1438 b-have my eye today. I tried to describe this chthonian planet to Eadaoin earlier, but I fell short because I couldn’t visualize some elements myself.

The formula for surface gravity of a planet is:

gplanet = G * M / r2

PSR J1719-1438 b has (both estimated) a mass of ~1.02 Mj and an equatorial radius of 0.4 Rj. So

Mplanet = (1.89813 * 1027) * 1.02 = 1.936572 * 1027
Rplanet = 69911 * 0.4 = 27964.4 = 2.27964 * 107
= (6.67 * 10-11) * (1.936572 * 1027) / (2.27964 * 107)2
= 248.55754152183457648718
= 248.55754152183457648718 / 9.81
= 25.3371601959 g

PSR J1719-1438 b’s surface gravity is ~25.3 times that of Earth. That isn’t too far off the Sun’s surface gravity of 27.94 g. You would die horribly, in agonizing pain, in several different simultaneous ways over the course of the following hour, while blind, if you ever set foot on PSR J1719-1438 b.

You would not, thankfully, die instantly! :)



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