Right, lets try this again.
I'm making a planet for a book I'm writing. I want to know if the planet I outline here is scientifically probable, able to support life, and what the climate would feasibly be like, compared to Earth.
First off, the planet is a terrestrial world, about 1.1 Earth masses and 1.04 Earth radii, giving it a surface gravity of 1.144, comparable to Neptune. It orbits a K-Type star, at a distance of 1.2 AU. It has an Albedo of 0.088, lending to a rich ash colored geology. It's axial tilt is 12 degrees, and its orbited by a moon around 0.0268 Earth masses, and a radius of 0.22 Earth radii. Said moon's Bond Albedo is about 0.20. Overall, I'm going for something along the lines of a mini Arakis in terms of look for the moon. Its orbit is 384,400 km from the planet.
Now, things get complicated with this last feature - a silicate debris ring, about the mass of Ceres (0.00016 Earth masses). It's inner edge being 2.56 Earth Radii from the surface, and 3.48 Earth Radii at its outer edge, making it 0.92 Earth Radii long. Since I'm bad at math, lets say its about 9.5 km thick. Their Bond Albedo is about 0.03.
I also have some more specific questions, along with my general ones above:
- Would black body radiation from the ash-colored deserts lead to the planet becoming warmer than Earth, or would dust being kicked up in the upper atmosphere make it cooler? Or would the two factors cancel each-other out?
- Would the rings cause an annual oscillation between antarctic temperatures and tropical temperatures where their shadow is cast upon the planet? Would this lead to massive storm-fronts and a general lack of plant-life around the tropics?
- Apart from more mild seasons, how would a 12 degree axial tilt affect climate on the planet's surface?
- Do I have to reduce the size of the moon to allow the rings to exist along geologic time-scales?
- If plant-life can exist on the planet, what color would they be to maximize energy absorption from a K-Type star?
Please also let me know if any other glaring problems become obvious from what I've outlined here. I want this to be as scientifically accurate as possible, so I can have a better idea of what needs to change and what's working well. Thank you in advance for your help!
Sun Characteristics): The Sun is a K-Type Star, with a Luminosity of 0.79 L and a temperature of 5518 K. According to the calculator Sonvar provided (thanks, by the way!), its Inner Habitable Zone is 0.845 AU, and Outer Habitable Zone is 1.49 AU. It's Stellar Flux on the inside of the HZ is 1.107, and on the outside is 0.356.
Water on the planet): Ideally, I was hoping the planet would have comparable amounts of water to Earth, maybe about 72%? If it means anything, I was thinking it'd have two main continents: one in the northern hemisphere, about the size of Eurasia, and one near the equator, about the size of Central America. It'd have a chain of islands comparable to South-East Asia in size off of the latter continent.