NGC 7000 · CYGNUS WALL AUG 2025
§ DEEP-SKY · TARGET
NGC 7000
Cygnus Wall
- TYPE
- Emission nebula
- CONSTELLATION
- Cygnus
- DISTANCE
- 1,600 ly
- MAGNITUDE
- +4.0
- APPARENT SIZE
- 120' × 100'
ACQUISITION
DATE
Aug 2025
LOCATION
Anza-Borrego, CA · Bortle 2
INTEGRATION
14h 10m
PALETTE
HOO
SUBS
850 × 60s
SEEING
1.8"
FILTERS
Ha 3nm · OIII 3nm
The North America Nebula's 'Cygnus Wall' is a ridge of ionized hydrogen where the dark cloud LDN 935 meets the glow of the larger H-II region. It's one of the few targets that genuinely deserves every hour of Ha you can throw at it.
§ 01 · THE NIGHT
How this one came together
Three nights on a cold desert floor. First night was a bust -- the tracking was garbage because I'd forgotten to re-balance after swapping the filter wheel. Second night got clean subs but the focus drifted after moon-rise. Third night was the charm: six hours of uninterrupted Ha, two on OIII, a temperature that never moved more than a degree. The scope held collimation through the whole run.
§ 02 · PROCESSING
Workflow
- Calibration: dark/flat/bias master stacks from that week
- Stacking: WBPP in PixInsight drizzle 2x
- Gradient removal: GraXpert 0.5px smoothing
- Star removal: StarXTerminator
- HOO palette: OIII to blue Ha to red synthetic green
- Deconvolution: BlurXTerminator corrected-only
- Noise reduction: NoiseXTerminator with a light mask
- Stars re-added in screen saturation clamped
§ 03 · GEAR
Equipment
- SCOPE
- Printed 200/800 Newt · OTA v1.3
- CAMERA
- ASI2600MM Pro · -10°C
- MOUNT
- EQ6-R Pro · polar-aligned ~10"
- FILTERS
- Antlia Ha 3nm · Antlia OIII 3nm
- GUIDING
- OAG · ASI120MM Mini · PHD2