LDN & LBN Objects in Cygnus (July 2025)

Object: LDN & LBN Objects in Cygnus (July 2025)

This field captures a rarely photographed region of the constellation Cygnus the Swan in the SHO palette to show an array of LBN (Lynds’ Bright Nebula) and LDN (Lynds’ Dark Nebula) objects.

Included in the field are:

- LBN 179 – Lynds’ Bright Nebula 179 – 1344 light years from Earth.

- LBN 177 – Lynds’ Bright Nebula 177 - between 6,500 and 10,000 light years from Earth

- LBN 174 – Lynds’ Bright Nebula 174 - approximately 1,400 light-years away from Earth

 

- LDN 856 – Lynds’ Dark Nebula 856 - approximately 800 to 1000 light-years from Earth.

- LDN 853 – Lynds’ Dark Nebula 853 – aka Barnard 147 – distance unknown

- LDN 852 – Lynds’ Dark Nebula 852 - distance unknown

- LDN 849 – Lynds’ Dark Nebula 849 - distance unknown

- LDN 848 – Lynds’ Dark Nebula 848 - distance unknown

- LDN 847 – Lynds’ Dark Nebula 847 - distance unknown

 

- NGC6871 – a small, young open cluster of less than 50 blue and white stars about 5135 light years from Earth

Details:

- Acquisition Date: 07/21/2025 to 07/25/2025

- Location: Western Massachusetts, USA

- Imaging Camera: QHY600PH-M -10°C - Mode 1(High Gain) Offset:15 Gain:56

- Telescope: Askar 185 APO 185mm f/7 Triplet Refractor

- Flattener: Askar 1x Full Frame Flattener for 185APO

- Mount: Astro-Physics AP1100 w/GTO4

- Guide scope: Celestron Off Axis Guider

- Guide Camera: ASI174m mini

- Software: Sequence Generator Pro, PixInsight 1.9 Lockhart, Aries Astro Pixel Processor, Adobe Photoshop CS5

 

Filters:

- Chroma Ha 3nm 50mm

- Chroma OIII 3nm 50mm

- Astrodon SII 3nm 50mm

 

Exposure Times:

- Hydrogen Alpha (Ha): 30 x 10min. (300min) bin 1x1

- Oxygen III (OIII):28 x 10min. (280min) bin 1x1

- Sulfur II (SII):34 x 10min. (340min) bin 1x1

 

Total Exposure/Integration:920min. (15.3hr)

 

Sky Quality:

-Magnitude: 19.71

-Bortle Class 5

-1.41 mcd/m^2 Brightness

-1234.6 ucd/m^2 Artificial Brightness

 

 

 

Done