HFG1 and Abell 6 in HOO, 59.4 hours from a Bortle 7 backyard

HFG1 is a faint planetary nebula in Cassiopeia. The bow shock forms as its binary central star (V664 Cas) ploughs through the interstellar medium, and it trails a long, faint OIII wake. Abell 6, a much smaller planetary nebula, shares the field. The frame is about 49′ × 32′.

https://app.astrobin.com/u/kcross

Equipment

Telescope: Vixen VC200L with 0.71× reducer (200 mm, 1294 mm, f/6.5)

Camera: ZWO ASI294MM Pro, −10 °C, gain 120, offset 8, bin 2 (0.74″/px)

Mount: 10Micron GM1000 HPS

Filters: Baader Ha 6.5 nm, Baader OIII 8.5nm, ZWO EFW

Focus and rotation: ZWO EAF, ZWO CAA

Acquisition: N.I.N.A. with Target Scheduler, in a roll-off-roof backyard observatory

Acquisition (October 2026, 10 nights)

Filter Subs Exposure Total

Ha. 664 180 s 33.2 h

OIII 524 180 s 26.2 h

Total 1188 59.4 h

OIII was shot on the darker nights with the moon down.…