The Ghost of Alnilam and a Near Earth Asteroid

Sometimes, what appears to be a disaster in astronomical imaging actually becomes a nice composition. The photographer’s telescopes normally observe and study near-Earth asteroids. While following the asteroid (11405) 1999 CV3, he was surprised to see an extremely bright star. It was the 1.8 magnitude Alnilam, the middle star in the Belt of Orion. It cast internal reflections throughout the telescope, but fortunately they avoided the asteroid crossing the centre of the field of view. This near-Earth asteroid was approximately 78 million miles away at the time. Alnilam is about 2,000 light years away, meaning the light we are seeing now left the star in biblical times. The light that left the asteroid was about eight minutes old.

Robert Stephens