The planet named Niflheim is the fourth planet of Nu Puppis, right
angle 6:36, declension-43:09; B8 type star, blue-white and hot, 148
light years distant from Earth, which will require a speed in excess
of light to reach it.
Niflheim is 462,000,000 miles from its primary, a little less than the
distance of Jupiter from our sun. It thus does not receive too great a
total amount of energy, but what it does receive is of high potential,
a large fraction of it being in the ultra-violet and higher
frequencies. (Watch out for really super-special sunburn, etc., on
unwarned personnel.)
The gravity of Niflheim is approximately 1 g, the atmospheric pressure
approximately 1 atmosphere, and the average ambient temperature
about-60°C;-76°F.