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2019-05-23 21:51:04 UTC

Consider a black hole with a mass of 4 x 10^20 Kg

The radius would be about 594 nanometers

The temperature would be about 92.6 degrees F

the surface gravity (a force) would be about 7.6 x 10^22 m/s^2

it would last a long time, say 1.7 x 10^38 years

Luminosity would be dim dim dim at 2.22 x 10-9 Watt

So, how close could you get without being sucked in? What would be a safe distance?

Perhaps you could estimate using Newton's inverse square law.

The radius would be about 594 nanometers

The temperature would be about 92.6 degrees F

the surface gravity (a force) would be about 7.6 x 10^22 m/s^2

it would last a long time, say 1.7 x 10^38 years

Luminosity would be dim dim dim at 2.22 x 10-9 Watt

So, how close could you get without being sucked in? What would be a safe distance?

Perhaps you could estimate using Newton's inverse square law.