Green comet Nishimura will reach closest point to Earth today, and it won't be back for another 430 years

[admin]

The comet Nishimura, which was only discovered in August, will soon be slingshotted around the sun and back out toward the edge of the solar system where it will remain for centuries.

Green comet Nishimura will reach closest point to Earth today, and it won't be back for another 430 years : Read more

 

[mikehcox]

The orbit can't be hyperbolic if it's coming back in 400 years. Objects in hyperbolic or parabolic orbits never come back. Objects in elliptical obits return.