M17, the Swan nebula (Guillermo (Guy) Yanez)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: Checkmark Nebula · IC 4706 · IC 4707 · Lobster Nebula · M 17 · NGC 6596 · NGC 6618 · Swan Nebula · omega Nebula

M17, the Swan nebula, Guillermo (Guy) Yanez

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M17, the Swan nebula

Link: https://www.flickr.com/photos/ecliptico/50001588348/in/dateposted/

Powered byPixInsight

M17, the Swan nebula

Link: https://www.flickr.com/photos/ecliptico/50001588348/in/dateposted/

Ha/Ha/CLS/OIII+SII

120/120/50/60 minutes

After heavy rain showers on Friday morning, the skies cleared up in the afternoon, allowing classic 5/5 transparency and 3/5 seeing conditions on a cold night. That meant unusually dark skies and twinkling stars. Nebulas love transparency, so it was the perfect occasion to capture the swan in the pond. I just could not keep the guiding under 1.5 arcsec RMS, so the stars appeared a little elongated on the lower right corner of the image. The guiding star was roughly on the center of the frame, but the result looks as if it was near the edge and imposed field curvature. That is kind of puzzling.

Regardless of that issue, I tested a new color palette and it worked at least for me (not sure if everyone will agree). I am not sure about the “true color" issue on narrowband since nebulas are gray scaled images to our eyes anyway. Yet, I tried to capture a pleasant natural color as far as narrowband would permit.

Object Name: M 17

Name 2: Swan Nebula

Object Type: Open Cluster and nebulae

RA (Topocentric): 18h 21m 58.9s

Dec (Topocentric): -16° 10' 22"

Transit Time: 01:36

Other ID: NGC6618

Date: 12-06-20

Constellation: Sagittarius

Constellation (Abbrev.): Sgr

N.I.N.A. Users
Southern Hemisphere Astro
Gimp Processing
KODAK 8300 sensor
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Astroimaging from Chile
Suburban Astrophotography

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Status	Basic success
Started	...
Astrometry.net job	3625465
PixInsight job	n/a
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M17, the Swan nebula

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