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Contains:  California nebula, NGC 1499, The star ξPer
Getting plate-solving status, please wait...
NGC 1499 - California Nebula, 


            Min Xie
NGC 1499 - California Nebula
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NGC 1499 - California Nebula

Technical card

Imaging telescopes or lenses: William Optics Gran Turismo 81 APO (2018)  ·  William Optics Camera Angle Rotator

Imaging cameras: ASI1600mm Pro

Mounts: Celestron Advanced VX

Guiding telescopes or lenses: QHYCCD PoleMaster  ·  QHYCCD QHYOAG-S  ·  Celestron StarSense

Guiding cameras: QHYCCD QHY5II-M

Focal reducers: William Optics Flat6A-II (x0.80)

Software: Adobe Photoshop CC 2016  ·  Astro Pixel Processor  ·  Sequence Generator Pro  ·  PixInsight 1.8 Ripley  ·  Adobe Lightroom 2017

Filters: Astrodon 3nm Ha 31mm

Accessory: PrimaLuceLab Sesto Senso Robotic Focusing Motor  ·  ZWO EFW  ·  Celestron SkySync GPS  ·  Kingdel NC860 (i7-8550U)

Dates:Oct. 28, 2018

Frames:Astrodon 3nm Ha 31mm: 72x180" (gain: 200.00) -20C bin 1x1

Integration: 3.6 hours

Darks: ~30

Flats: ~80

Bias: ~40

Avg. Moon age: 18.71 days

Avg. Moon phase: 83.36%

Bortle Dark-Sky Scale: 9.00

Mean SQM: 18.00

Temperature: 15.00

Basic astrometry details job: 2344022

RA center: 3h 59' 51"

DEC center: +36° 30' 7"

Pixel scale: 4.674 arcsec/pixel

Orientation: 183.409 degrees

Field radius: 1.498 degrees

Resolution: 1920x1280

Locations: Backyard, Coppell, Texas, United States

Data source: Backyard


After long ... long .. 2 months of raining in North Texas, a 3-night clear sky window finally happened. The original plan is to capture a full set of Ha, S-II and O-III on California Nebula over 3 nights. But things happened, eventually the outcome of the weekend nights are 3.65 hours of Ha, 4.65 hours of S-II and 4.85 hours of O-III from my white zone backyard.

And I found out, the poor 4.0+ hours of S-II and O-III are nothing in the post processing. The first look at the integrated masters told me directly that the data is far from enough. Duh...

Okay, Ha data first. Here it comes.

- Astro Pixel Processor: Stacking (Calibration, Integration)
- PixInsight: Star Alignment
- PixInsight: Dynamic Crop
- PixInsight: Dynamic Background Extraction (# of passes)
- PixInsight: Deconvolution
- PixInsight: PixelMath Background Naturalization
- PixInsight: MultiscaleLinearTransform (Noise Reduction)
- PixInsight: ScreenTransferFunction / HistogramTransformation -> non-Linear state
- Photoshop: Google Nik Collection
- Lightroom: Final Touch-up

... I need a f2.0 300mm lens ...



Min Xie
License: Attribution-NonCommercial Creative Commons

Sky plot

Sky plot


NGC 1499 - California Nebula, 


            Min Xie