Centaurus A — The Aftermath of a Galactic Collision

Centaurus A (NGC 5128) is one of the closest giant galaxies beyond our Local Group and one of the most striking examples of a galaxy shaped by a past merger.
Centaurus A is not an easy target from poluted city skies. Its bright core hides delicate structures that demand patience, good conditions, and time — three things that rarely cooperate at once. This image was captured under far-from-ideal skies and with limited integration time, which made the challenge even sharper.
Even so, the result brought an unexpected reward. Subtle shell structures around the halo emerged more clearly than I anticipated, along with the intricate dark lanes that give this galaxy its unmistakable appearance. What truly surprised me came later, during inspection in Aladin: dozens of globular clusters surrounding Centaurus A became detectable across the field — quiet companions orbiting a galaxy still marked by the aftermath of an ancient merger.
Despite the constraints, this image felt like a small victory — the kind that reminds us why some targets keep calling us back.

Technical Details
NGC 5128 — Centaurus A
GSO 200 mm f/5 Newtonian
HEQ5 Pro mount
IMX571 camera
Antlia Quadband filter
32 × 480 s (4h16m total)
Captured from Vitória, Brazil — Bortle 8/9
Processed in PixInsight

Autore: Erly Alexandrino (sito)