# Is the planet Sentia realistic?

In a world I am building, there is a planet named Sentia. Sentia orbits around a G1 star called Prometheus and has two moons, Valkyrie and Cerberus, whose masses add up to around the mass of our moon.

• Sentia's mass is $8,3608*10^{24}$ kilograms.
• The radius is about $7.55*10^6$ meters, and the density is $5.515 \frac{grams}{centimeters^3}$.
• Sentia's gravity is 1 G.
• Sentia's distance from Prometheus is 1.249831552255972 AU, and the luminosity of Prometheus is 1.25 Solar luminosities.
• All water on Sentia is contaminated with high amounts of mercury.

All of the numbers were calculated using equations I found online. Is all this realistic to support human life?

• Just a note: all air and water on Earth have some small amount of mercury (or mercury compounds) in them. As Paracelsus famously said, it is the dose which makes the poison. Commented May 1, 2017 at 17:58
• Do you mean realistic to support human life? Or are you asking if the numbers are realistic, because they are not far off from Earth's. I assume you based this off earth's density and scaled up? Commented May 1, 2017 at 17:59
• Yes, I did base Sentia off of Earth and scaled up, and thank you to whoever formatted this question correctly. I am quite new and have no idea how to format things yet. Commented May 1, 2017 at 18:02
• 1 AU = 149,597,870,700 meters. Your planet's distance to its star has four more significant digits than the definition of an astronomical unit! You might want to scale that back a little, or at least if you're going to such an extreme route, specify whether that's the semi-major or semi-minor axis (and the eccentricity in either case, either by specifying either semi axis and the eccentricity, or both the semi-major and semi-minor axis from which the eccentricity can be derived).
– user
Commented May 1, 2017 at 18:28
• – user
Commented May 1, 2017 at 18:36