The fourth planet of Gavu, HIP 11915 (also known as HD 16008), Tarn is one of two in its Goldilocks Zone, the range where liquid water exists. Both Tarn and Zweelot, its closest neighbor in space, are inhabited terrestrial (rocky) planets. HIP 11915 is slightly less metallic than Sol. It is approximately the same age.
Circumference:
Tarn is larger than Earth with a circumference of 31280 km. versus Earth’s 24900 km.
Atmosphere:
Tarn’s atmosphere consists mostly of nitrogen and oxygen. Excess energy received in tropical regions is redistributed by atmospheric and ocean circulation to polar regions. The coriolis effect is present in both northern and southern hemisphere. Winds in temperate regions move similar to the rotation, and the air flows back the opposite direction t the equator. The climate is more severe in general than Earth’s.
Orbit:
Tarn’s solar orbit of Gavu is 384 days.
Satellites and Calendar:
It has two moons. They are named after the gods associated with them.
The large moon, Darn, has an orbit of 24 days. The small moon, Desh (the Fast moon, Darn’s son) has an orbit of 8 days. There are 48 orbits per Tarn solar orbit. There are 16 orbits of the large moon per Tarn solar orbit. The small moon is much closer than the large moon. Both moons are tidally locked.
Planet Speed at Equator (km/h): 1600
For comparison purposes:
Mercury 10.9
Venus 6.5
Earth 1670
Mars 867
Jupiter 45600
Saturn 37000
Uranus 10900
Neptune 8460
Pluto 47
Gravity:
At approximately 10 m/s**2, the gravitational pull exerted by the planet is large than Earth, but only slightly (about 2%).
