Imaging telescopes or lenses: Astro-Tech AT8IN
Imaging cameras: ZWO ASI1600MM-Cool
Mounts: Skywatcher NEQ-6 Pro Synscan
Guiding telescopes or lenses: Astro-Tech AT8IN
Guiding cameras: ZWO AS120MM-Mini
Focal reducers: High Point Scientific Coma Corrector Photo & Visual For Netwonian Telescopes 2"
Software: DeepSkyStacker · Silicon Fields StarTools 1.3 · AstroPlanner · PHD2 Guiding · Sequence Generator Pro · EQASCOM · photoshop
Filters: ZWO Red 31 mm · ZWO Green 31 mm · ZWO H-alpha 7nm · ZWO Blue 31 mm
Accessory: Orion Thin Off Axis Guider (TOAG) · Robert Brown's Arduino ASCOM Focuser Pro DIY · ZWO EFW filter wheel
Dates:Aug. 27, 2019 , Aug. 28, 2019
Frames:
ZWO Blue 31 mm: 23x180" (gain: 139.00) -20C bin 1x1
ZWO Green 31 mm: 20x180" (gain: 139.00) -20C bin 1x1
ZWO H-alpha 7nm: 34x300" (gain: 139.00) -20C bin 1x1
ZWO Red 31 mm: 20x180" (gain: 139.00) -20C bin 1x1
Integration: 6.0 hours
Avg. Moon age: 26.72 days
Avg. Moon phase: 8.98%
Bortle Dark-Sky Scale: 5.00
Astrometry.net job: 3007398
RA center: 0h 1' 31"
DEC center: +64° 36' 0"
Pixel scale: 1.719 arcsec/pixel
Orientation: 3.727 degrees
Field radius: 0.692 degrees
Resolution: 2298x1770
Locations: Mapleton Lateral Observatory, Mapleton, Utah, United States
Data source: Backyard
8100 ± 1000 LY
I thought I could do better with this object than in the past, so gave it an attempt. It shows up reasonably well in Hα but with shorter exposures using R, G, and B the nebulosity hardly shows at all. Neither did I get anything in SII. These kinds of objects usually don’t show much in OIII so I was lazy and didn’t try that, although I see online that its center does emit a little in OIII.
Date: 27, 28 Aug 2019
Subject: Sh2-170, Small Rosette Nebula
Scope: AT8IN+High Point Scientific Coma Corrector
Filters: ZWO 31 mm diameter unmounted 7 nm Hα, OIII
Mount: EQ-6 (EQMOD 2.000j)+PEC
Guiding: Orion Thin Off-axis Guider + ASI120MM-mini +PHD 2.6.6 (Win 10 ASCOM)
Camera: ASI1600MM-Cool, -20 °C, Gain 139 Offset 21
Acquisition: Sequence Generator Pro 3.1.0.213
Exposure: 34x300 Hα, 20x180 R, 20x180 G, 23x180 B
Stacking: Deep Sky Stacker 4.2.2 (64-bit) dark+flat+bias, κ-σ stacking with κ = 1.5.
Processing: StarTools 1.4.352: Software binned 2x2, cropped, wiped, developed, HDR optimized, deconvoluted, and untrack denoised the Hα. Combined R, G, & B in StarTools, binned 2x2, cropped, developed, HDR optimized, boosted saturation and untracked denoised. Combined Hα and R (50% each) in Photoshop and used the combination as the R layer. Used Hα as luminance. Curves & Levels, saturation boost, capped by some layer-masked saturation boost for just the nebula. AstroFrame.
| ZWO ASI1600MM/QHY163M |
| Image the Universe |
| Narrowband imaging |
Comments