NGC6604 in Serpens (September 2025)

Object: NGC6604 and surrounding nebulosity in Serpens (SHO Palette) (September 2025)

This is a busy field of view to be sure. The highlight is NGC 6604, a young, compact open cluster of stars in the constellation of Serpens, positioned just north of the Eagle Nebula (NGC 6611). The cluster is located at a distance of 4,580 light years from our Sun.

NGC6604 is still undergoing star formation and it lies at the heart of an H II region with the identifier S54. The cluster has an estimated age of 6.5 million years and contains several massive stars of the OB type. One of the stars is the high mass triple star system HD 167971 and is one of the most luminous stars in the galaxy.

Also included in the FOV:

-NGC6625 - an Open Cluster in the Scutum constellation

-SH2-53 (lower left corner) a group of small bright nebula.

-SH2-54- an extended bright nebula in the constellation of Serpens.

-LBN 70- Lynds Bright Nebula

-LBN 71 – Lynds Bright Nebula

-LBN 72 – Lynds Bright Nebula

-LDN 394 – Lynds Dark Nebula

-LDN 405 – Lynds Dark Nebula

-LDN 406 – Lynds Dark Nebula

-LDN 414 – Lynds Dark Nebula

Details:

- Acquisition Date: 09/19/2025 to 09/20/2025

- Location: Jenkin’s Beach - Green Lake in Dedham, Maine, USA

- Imaging Camera: ZWO ASI2600MM PRO @ -10°C -Gain 100 Offset 50

- Filterwheel: ZWO EFW 7 x 36mm

- Telescope: William Optics RedCat 71 f/4.9 APO Imaging Astrograph with WIFD

- Focuser ZWO EAF

- Mount: Sky-Watcher - Wave 150i Strainwave Mount

- Guide scope: ZWO OAG-L

- Guide Camera: ZWO - ASI220MM Mini

- Software: NINA, PixInsight 1.9 Lockhart, Aries Astro Pixel Processor, Adobe Photoshop CS5

 

Filters:

- Antlia Ha 3nm 36mm

- Antlia OIII 3nm 36mm

- Antlia SII 3nm 36mm

 

Exposure Times:

- Hydrogen Alpha (Ha): 10 x 5min. (50min) bin 1x1

- Oxygen III (OIII):10 x 5min. (50min) bin 1x1

- Sulfur II (SII):11 x 5min. (55min) bin 1x1

 

Total Exposure/Integration:155min. (2.58hr)

 

Sky Quality:

SQM- 21.83 mag/arcsec2

Brightness- 0.201 mcd/m2

Artificial bright. -29.8 μcd/m2

Ratio - 0.174

Bortle class 3

 

 

 

Done