Hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  Checkmark Nebula  ·  IC 4701  ·  IC 4706  ·  IC 4707  ·  Lobster Nebula  ·  M 17  ·  M 18  ·  NGC 6596  ·  NGC 6613  ·  NGC 6618  ·  Swan Nebula  ·  omega Nebula
Getting plate-solving status, please wait...
M17 - Omega Nebula (Bicolor palette), 


            Diego Cartes
M17 - Omega Nebula (Bicolor palette)
Powered byPixInsight

M17 - Omega Nebula (Bicolor palette)

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 OIII -7nm 36mm  ·  ZWO H-alpha 36mm

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

Dates:July 13, 2020July 14, 2020July 15, 2020July 16, 2020

ZWO OIII -7nm 36mm: 37x600" bin 1x1
ZWO H-alpha 36mm: 41x600" bin 1x1

Integration: 13.0 hours

Darks: ~50

Flats: ~20

Bias: ~50

Avg. Moon age: 23.96 days

Avg. Moon phase: 31.60%

Astrometry.net job: 3675568

RA center: 18h 21' 12"

DEC center: -16° 6' 28"

Pixel scale: 2.058 arcsec/pixel

Orientation: 220.698 degrees

Field radius: 1.645 degrees

Resolution: 4608x3448

Data source: Backyard


The Omega Nebula, also known as the Swan Nebula, Checkmark Nebula, and the Horseshoe Nebula (catalogued as Messier 17 or M17 or NGC 6618) is an H II region in the constellation Sagittarius. It was discovered by Philippe Loys de Chéseaux in 1745. Charles Messier catalogued it in 1764. It is located in the rich starfields of the Sagittarius area of the Milky Way. (Wikipedia).

Just had three clear nights before clouds return, so i tried to capture a bright nebula to continue my hunting of Messier Catalog Objets. The image is made of data captured using HAlpha and OIII filters, totalizing 13 hours of integration time.


Sky plot

Sky plot


M17 - Omega Nebula (Bicolor palette), 


            Diego Cartes

In these public groups

Cloudy Nights