Hemisphere:  Northern  ·  Constellation: Taurus (Tau)  ·  Contains:  1 Gem  ·  103 Tau  ·  104 m Tau  ·  105 Tau  ·  106 l Tau  ·  108 Tau  ·  109 n Tau  ·  11 mu. Aur  ·  111 Tau  ·  112 bet Tau  ·  114 o Tau  ·  115 Tau  ·  117 Tau  ·  118 Tau  ·  119 CE Tau  ·  12.26  ·  12.34  ·  12.68  ·  120 Tau  ·  121 Tau  ·  122 Tau  ·  123 zet Tau  ·  125 Tau  ·  13.41  ·  13.79  ·  130 Tau  ·  132 Tau  ·  136 Tau  ·  139 Tau  ·  14 Aur  ·  And 130 more.
Sh2-240 - The Spaghetti Nebula (Widefield), 



    
        

            lefty7283
Powered byPixInsight

Sh2-240 - The Spaghetti Nebula (Widefield)

Sh2-240 - The Spaghetti Nebula (Widefield), 



    
        

            lefty7283
Powered byPixInsight

Sh2-240 - The Spaghetti Nebula (Widefield)

Technical card

Imaging telescopes or lenses: Tamron 17-50mm F2.8

Imaging cameras: ZWO ASI1600MM-Pro

Mounts: Orion Sirius EQ-G

Guiding telescopes or lenses: Agena 50mm Deluxe Straight-Through Finder / Guide Scope with Helical Focuser

Guiding cameras: ZWO ASI 120 MC

Software: Nighttime Imaging 'N' Astronomy  ·  PixInsight 1.8 Ripley PixInsight

Filters: Astrodon Ha 31mm 5nm  ·  Astrodon OIII 31mm 3nm

Accessory: ZWO EFW 8 x 1.25″/31mm


Dates:Dec. 30, 2019Dec. 31, 2019Jan. 5, 2020

Frames:
Astrodon Ha 31mm 5nm: 82x600" (13h 40') (gain: 139.00) -20C
Astrodon OIII 31mm 3nm: 27x600" (4h 30') (gain: 139.00) -20C

Integration: 18h 10'

Darks: 30

Avg. Moon age: 6.18 days

Avg. Moon phase: 38.25%

Bortle Dark-Sky Scale: 6.33


Astrometry.net job: 3234642

RA center: 5h 41' 17"

DEC center: +27° 55' 3"

Pixel scale: 11.219 arcsec/pixel

Orientation: -88.285 degrees

Field radius: 13.976 degrees


Resolution: 7229x5421

Data source: Backyard

Description

This has been the most difficult object I've gone after so far! The [Spaghetti Nebula in the middle](https://i.imgur.com/NwRs5Zz.jpg) is a stupidly faint supernova remnant caused by a star exploding about 40,000 years ago. It was difficult to pull out the nebulosity while keeping the noise down, and I spent quite a bit of time working on star reduction to further emphasize the nebula. [I also ran StarNet++ to make a completely starless version](https://i.imgur.com/gJWUL2q.jpg), but it leaves a lot of artifacts when zoomed in. I doubt I'll continue using this lens for astrophotography due to its aberrations, even when stopped down. Captured on December 30th and 31st, 2019, and January 5th, 2020 from a bortle 6 zone.



**[Equipment:](https://i.imgur.com/BYyK1wu.jpg)**

* TPO 6" F/4 Imaging Newtonian

* Orion Sirius EQ-G

* ZWO ASI1600MM-Pro

* Skywatcher Quattro Coma Corrector

* ZWO EFW 8x1.25"/31mm

* Astronomik LRGB+CLS Filters- 31mm

* Astrodon 31mm Ha 5nm, Oiii 3nm

* Agena 50mm Deluxe Straight-Through Guide Scope

* ZWO ASI-120MC for guiding

* Moonlite Autofocuser

**Acquisition:** 18 hours 10 minutes (Camera at Unity Gain, -20°C)

* Ha- 79x600"

* Oiii- 27x600"

* Darks- 30

**Capture Software:**

* EQMod mount control. Captured using [N.I.N.A.](https://nighttime-imaging.eu/) and PHD2 for guiding and dithering.

**[PixInsight Processing](https://i.imgur.com/w69oGOS.png):**

* BatchPreProcessing

* StarAlignment

* [Blink](https://youtu.be/sJeuWZNWImE?t=40)

* ImageIntegration

* DrizzleIntrgration

* DynamicCrop

* AutomaticBackgroundExtraction 2X

* TGV/MMT Noise reduction per channel

* Pixelmath to combine channels (HOO combination)

* PhotometricColorCalibration (Narrowband working mode)

* STF stretch applied via HistogramTransformation

* LRGBCombination using stretched Ha as luminance

* ACDNR

* ColorCalibration

* [Curve](https://i.imgur.com/M0qzbaV.jpg)Transformation

* PixelMath ([Star De-emphasis method by Adam Block](https://adamblockstudios.com/articles/star_demph))

* MMT Noise reduction

* More CurveTransformations

* MorphologicalTransformation to reduce star sizes

* Resample to 80%

* Annotation

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