# 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. – AlexP May 1 '17 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? – Firelight May 1 '17 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. – Loveranimal999 May 1 '17 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 May 1 '17 at 18:28
• – user May 1 '17 at 18:36