IC 434 | The Horsehead Nebula


The Horsehead Nebula is part of a dark cloud in the constellation Orion, which stands out in front of the red glowing emission nebula IC 434 with a silhouette similar to a horse's head. The nebula is approximately 1500 light years away from Earth and appears to be a quarter of the size of the Earth's moon. Due to its equatorial position, it can be observed from all inhabited areas of the Earth.

The Horsehead Nebula was discovered as early as 1887 with the help of the then new photography. Williamina Fleming, entrusted with the examination of the photographic plates by the director of the Harvard College Observatory, Edward Charles Pickering, recognized the nebula as a semicircular indentation in an emission nebula.

Today, the Horsehead Nebula is a very popular object to photograph. 



Sony a7s astromodified


APM 152/1200 LZOS refractor


Self-made fork mount


No filtering for this shot


137 x 120 seconds (4.5h)


Stacked and calibrated with flats, darks and bias in Astropixelprocessor

Edited with Pixinsight and Photoshop