[netsec_burn]

We've already detected all asteroids with that mass in our solar system [1]. There are smaller ones that won't end life on Earth that are still concerning, but the quandary is we have almost nothing to do even if we detected a threat from an asteroid.

[1] https://youtu.be/4Wrc4fHSCpw

[Qem]

Only in the near planetary region of the solar system. There's lots of comets with very long periods we didn't detect yet, because their last visit to the inner solar system was centuries or even millennia ago.

[gitfan86]

If only someone was trying to build a spaceship company that could launch massive payloads everyday.

[ceejayoz]

> We've already detected all asteroids with that mass in our solar system.

We really haven't. We found Sedna in 2003. Makemake and Eris in 2005.