Passage: Due to it being discovered by the radial velocity method, the only known physical parameter for Ross 128 b is its minimum possible mass. The planet is at least 1.35 M⊕, or 1.35 times the mass of Earth (about 8.06×1024 kg). This is slightly more massive than the similar and nearby Proxima Centauri b, with a minimum mass of 1.27 M⊕. The low mass of Ross 128 b implies that it is most likely a rocky Earth-sized planet with a solid surface. However, its radius, and therefore its density, is not known as no transits of this planet have been observed. Ross 128 b would be 0.5 R⊕ (Earth radii) for a pure-iron composition and 3.0 R⊕ for a pure hydrogen-helium composition, both implausible extremes. For a more plausible Earth-like composition, the planet would need to be about 1.10 R⊕ - i.e., 1.1 times the radius of Earth (approximately 7008 km). With that radius, Ross 128 b would be slightly denser than Earth, due to how a rocky planet would become more compact as it increases in size. It would give the planet a gravitational pull around 10.945 m/s2, or about 1.12 times that of Earth.Ross 128 b is calculated to have a temperature similar to that of Earth and potentially conducive to the development of life. The discovery team modelled the planet's potential equilibrium temperature using albedos of 0.100, 0.367, and 0.750. Albedo is the portion of light that is reflected instead of absorbed by a celestial object. With these three albedo parameters, Ross 128 b would have a Teq of either 294 K (21 °C; 70 °F), 269 K (−4 °C; 25 °F), or 213 K (−60 °C; −76 °F). For an Earth-like albedo of 0.3, the planet would have an equilibrium temperature of 280 K (7 °C; 44 °F), about 8 degrees Kelvin lower than Earth's average temperature. The actual temperature of Ross 128 b depends on yet-unknown atmospheric parameters, if it has an atmosphere.In 2018, astronomers, based on near-infrared, high-resolution spectra (APOGEE Spectra), determined the chemical abundances of several elements (C, O, Mg, Al, K, Ca, Ti, and Fe) present in Ross 128...

Question: How many parameters determine the Teq of Ross 128 b?
three albedo parameters