Sh2-91 The Other Veil Nebula
Sh2-91, the Other Veil nebula, is part of supernova remnant G65.2+5.7 which stretches almost 600 light-years across. This portion covers about 230 light-years. The supernova remnant is about 2,500 light-years from Earth. It is thought to be very old, with some estimates as much as 400,000 years.

Sh2-91 is considerably fainter than the commonly known Veil Nebula. To get a clean capture of the fainter detail, 3nm filters are required as well as about 10 hours of total integration tme.

Scope/Mount: StellarVue SV70T Refractor with SFFR-70APO Focal-reducer/Field-flattener, Celestron CI-700 Mount
Camera: ZWO ASI1600MMC monochrome with ZWO LRGB filters and Antlia 3nm SHO filters
Guiding: QHY5L-IIM through Orion Thin OAG, PHD guiding software
Exposure: Ha:(18) 300 secs @ gain=300, Oiii: (18) 300 secs @ gain = 300, RGB: each channel (10) 120 sec @ gain=200
Software: Nebulosity, Pixinsight
Comment: 06-13-2026, Tierra del Sol, CA, good conditions, palette = HOO plus RGB for stars.