I have been keeping a watch out for killer asteroids, having bought a cheap telescope from the junk shop, hence supplying the first line of defence for Australia. I have not seen much in the night sky yet, just a few huge mossies that landed on the lenses. Then there are these articles documenting near misses, and some strikes, almost every day by small space rocks:
https://www.express.co.uk/news/science/1175533/Asteroid-news-impact-asteroid-hit-earth-nasa-warning-space-latest-updates
https://www.express.co.uk/news/science/1171930/Asteroid-news-chance-of-impact-asteroid-hit-earth-Lembit-Opik-asteroid-warning
https://www.express.co.uk/news/science/1176211/asteroid-news-nasa-space-agency-earth-science-news-latest
https://science.nasa.gov/science-news/science-at-nasa/2014/16nov_bolides
https://www.txstate-epdc.net/just-frequently-meteors-hit-earth/
https://www.cbc.ca/news/technology/dangerous-meteors-hit-earth-way-more-often-than-thought-1.2417013
“Event similar to Chelyabinsk meteor strike happen once every 30 years, not 150
Scientists studying the terrifying meteor that exploded without warning over a Russian city last winter say the threat of space rocks smashing into Earth is bigger than they thought. Meteors about the size of the one that streaked through the sky at 67,000 kilometres per hour and burst over Chelyabinsk in February — and ones even larger and more dangerous — are probably four to five times more likely to hit the planet than scientists believed before the fireball, according to three studies published Wednesday in the journals Nature and Science. Until Chelyabinsk, NASA had looked only for space rocks about 30 metres wide and bigger, figuring there was little danger below that.