Here's a link to a FB group on 3i Atlas. There are a lot of Alien believers in there, I would say a majority believe it is some sort of Alien technology.

These are my personal posts on that page. I tend to be the voice of reason, so if you are stressed that Aliens are coming, read my posts, they should bring you back down. 

Here is a page with the current position of 3i Atlas comet.

Below is the original 11W article:

3i/Atlas is traveling at an incredible 137,000 MPH. Proxima Centauri is the nearest star to our star (the Sun) and is 25 trillion miles away. If it were traveling from that Solar System, it would take 20,831 years to get to Earth at 137k MPH (25,000,000,000,000 / 137000 / 24 / 365). The Universe's size is incredible indeed.

Even at its closest point, 3i will never be visible to the naked eye, and will barely be visible with the best telescopes built by mankind, it is just too small and far away. It is 219 million miles from Earth today. Earth's orbit will bring it as close as 170 million miles, as 3i continues to move away from Earth's orbit day by day. 3i's location, as of today (below). 

Earth is moving closer towards 3i/Atlas (think of it like a slow Safety taking a bad angle on a RB, as he heads away and towards the endzone). Earth moves around the Sun at 67,000 mph, less than half the speed 3i is moving at. On December 19th of this year, this (marked in blue X's below) will be its closest point. I am colorblind, so it could be purple X's lol. I just chose the color randomly.