Hemisphere:  Southern  ·  Constellation: Scorpius (Sco)  ·  Contains:  B48  ·  IC 4628  ·  IC4628  ·  NGC 6231  ·  NGC 6242  ·  NGC6231  ·  NGC6242  ·  PK344+02.1
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IC 4628 - Prawn Nebula in Scorpius (Narrowband HA), 


            Diego Cartes
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IC 4628 - Prawn Nebula in Scorpius (Narrowband HA)

Imaging telescopes or lenses: Televue TV-76

Imaging cameras: ZWO ASI 1600MM Cooled Pro

Mounts: Celestron Advanced VX

Guiding telescopes or lenses: Celestron 50mm Guide Scope  ·  ZWO 60mm Guidescope

Guiding cameras: ZWO ASI 290mm Mini

Focal reducers: Televue 0.8x focal reducer / field flattener

Software: PixInsight 1.8 Pisinsight 1.8  ·  Sequence Generator Pro

Filters: ZWO H-alpha 36mm

Accessory: ZWO 7x 36mm Filter Wheel (EFW)  ·  Intel NUC  ·  Arduino ASCOM Focuser Pro2  ·  QHYCCD Polemaster

Dates:May 16, 2020May 17, 2020May 18, 2020

Frames:ZWO H-alpha 36mm: 86x600" bin 1x1

Integration: 14.3 hours

Darks: ~50

Flats: ~25

Bias: ~50

Avg. Moon age: 24.77 days

Avg. Moon phase: 23.82%

Astrometry.net job: 3550922

RA center: 16h 56' 23"

DEC center: -40° 29' 51"

Pixel scale: 2.058 arcsec/pixel

Orientation: -33.788 degrees

Field radius: 1.666 degrees

Resolution: 4656x3520

Locations: Backyard, Colina, Region Metropolitana, Chile

Data source: Backyard


Prawn Nebula, also known as IC 4628, is an emission nebula located in the Sagittarius Arm of the Milky Way, around 6,000 light-years from Earth in the constellation Scorpius. It forms part of the tail of the "False Comet" anchored by the bright open cluster NGC 6231. (Wikipedia)

This image was made using only the information captured using a H-Alpha filter. It allows to see the detail inside the nebula, mainly some gas globules that probably will be the birthplace to new stars.


Sky plot

Sky plot


IC 4628 - Prawn Nebula in Scorpius (Narrowband HA), 


            Diego Cartes

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