English: This is one of the light echoes caused by the Eta Carinae eruption.
I used archived DECam images to create a gif that spans over 3 years. The position is similar to the light echo studied by Smith et al. 2018, but they used to study only a small part.
Image Credit: NSF, AURA, NOAO
Telescope: CTIO Blanco 4 metre telescope
Instument: DECam
filters: g, r, i
RA: 161.02426 d
DEC: -60.307519 d
Epochs: 2015, 2016, 2017, 2018
Software: NOAO Data Lab, SAO DS9, Photoshop Elements 12