PaRasMoMi-1 in three narrowband renderings. (a) Hα 5 nm; (b) [O III] λ5007 5 nm; (c) composite Hα+[O III]+LRGB. Images obtained with a 12.5 inch AG Optical RC Telescope+QHY 600 Mono CMOS at a remote observatory in Atacama, Chile (P. Dufour), 2021 April 8–18; total integration ∼19 hr 48 minutes. North is up, east is left; field of view approximately 45′ × 45′. The [O III] emission shell is prominent in panel (b) and absent in panel (a), confirming the Hα non-detection. The bow-shock arc associated with HD 48099 is visible near the southwestern boundary of the shell.