The new star detection registration is perfect for deep sky images, but there are also two automatic translation-only registrations, one more suited for planetary and bright nebula images, based on Fourier transform, and another more simple targeted at deep-sky images, based on PSF on a single reference star.
One feature still missing for planetary images processing is image deformation, but it is still capable of registering and processing them in an elegant way. Siril is now fully capable to pre-process and process deep sky images. It also provides a basic command line to access various processing functions. It provides a more user-friendly interface than Iris' command line as well as more modern and powerful processing algorithms, but it is not yet as automated as DeepSkyStacker or Registax. Siril is targeted to amateur astronomers having acquired images and wanting to process them in a semi-automatic way. This image was processed using Siril, see other processing results.