Originally Posted by
Mistral
Nah. Traditional Christian eschatology regarding the Revelationary Apocalypse has the great earthquake that dislocates all the mountains of the world and sets islands adrift fairly early on. We still get to enjoy all of the stars falling from the sky, the four angels who presage the fifth angel and the Seal of God (which marks 144k Jews), a mountain-sized comet (so, not this one) that will plunge into the sea and turn one-third of the water to blood, kill one-third of all organisms (including plankton?), and sinking one-third of all ships. Then there's the talking eagle, a bottomless pit that will open and release locusts to sting all except the marked, death will become (temporarily) impossible, the locusts will turn into monsters and butcher one-third of all people, a red dragon that will knock a third of the stars (the ones fell, remember?) from the heavens, Leviathan and the Antichrist (Kyogre and Groudon...seriously), seven plagues carried by seven angels, the destruction of Babylon (wait...), the destruction of all islands, the death of the Antichrist. Then, a thousand years later (yay, millenialism), the pit reopens, Satan tries again and fails, and God gets fed up and just creates Heaven on Earth.
That's...*snrk*. People are identifying Elenin with Nibiru, now? Nibiru, identified as Planet X, was a fictional construct created to explain oddities in the orbit of Uranus and Neptune, which seemed reasonable at the time given that Neptune had been discovered by tracking oddities in Uranus' orbit. Unfortunately, the equations were just off. When the ephemeris data for these planets was fed into the correct equations, they were in accord with the observed orbits. Nibiru does not exist. Sitchin, the person who equated this scientific concept with his new-age hookum, was an idiot; he didn't even know the Sumerian word for planet, and he was pretending to be an expert in Sumerian catastrophism. His concept of the catastrophism actually came from the Sumerian origin story - it was how they thought the Earth came to be, not how it would end. If Nibiru did exist, we would have seen its effect on the orbits of all of the planets for the last few centuries. That picture is not Nibiru. It's not even Elenin. Even if it was Nibiru, and it massed as much as Jupiter (which is more massive than you're suggesting), it still wouldn't set off earthquakes at closest approach. Phenomena like Io's tectonic activity occur because of a regular orbital resonance that causes the crustal layer to pull and tug back and forth. Pulling and tugging "forth and forth" won't do it, especially under such a limited time frame, unless you get near the Roche limit, in which case the people on the planet are going to have bigger concerns than earthquakes. And no, closest approach is not near the Roche limit.
Right, here is the observed knowledge of C/2010 X1, popularly referred to as Elenin. Its coma, at its largest, was 200 000 kilometres, almost six months ago, which is probably where your "five times bigger" originated (though, to be fair, that's closer to a hundred times bigger). However, a coma is merely a tenuous gas cloud, created by the solar wind driving sublimated vapor off the nucleus, which is the only solid material in the comet, and spans an estimated 3-4 kilometres. As the comet recedes from the sun, the weakening effect of the solar wind causes the coma to shrink. It masses so little, and its orbit is so eccentric, that planetary interactions have a dominating effect on it, such that we need to use barycentric rather than conventionally heliocentric calculations from the Solar System's net center of mass. In addition, C/2010 X1, in August 19, was struck by a CME, accelerating its apparent collapse and disintegration. There's some question whether we'll even be able to see it at all from Earth even at closest approach, due to the rapid decay in its apparent magnitude. It's not going to be the end of the world. It's not even going to be the end of the world as we know it.