2021 Michael A. Siniscalchi
Home

What's New

About

Gallery

Odds n Ends
Contact

    LDN899
       Dark Nebula in Cygnus
       RA:20h 23m 49s  Dec: +42 39' 45"  ~Size - 5.6'

Click on image for a mouse over starless & color version
   This 6 panel mosaic of LDN899 also captures other objects including NGC6914 reflection nebula, LBN270, LBN273, LBN274, LBN279, LDN897 & LDN900.
The starless version on the next page better displays the structure and also enhances what looks like a dusty ghost emerging.

Location & Date
Backyard, Abbott Observatory- Long Island, NY,  September/October 2021
Telescope
TMB130SS F/7 APO, Moonlite focuser, Losmandy G11 Gemini
Image scale 1.54 arcsec/pixel
Camera
SBIG ST-10XME
Baader  Ha R G B  filters
CCD temp -10C
Exposures
Ha 18x10m  Red-6x5m Green -6x5m Blue-6x5m   Bin 1x1  per each mosaic panel
Planning & Acquisition
Image mosaic planning - Sequence Generator Pro
Image acquisition - Sequence Generator  & PHD2 (guiding)
Processing
CCDStack - calibration, debloom
Astro Pixel Porocessor - normalize, stacking, mosaic assembly
Adobe Photoshop -   Ha+RGB Color processing, Noise reduction, JPEG conversion
This is a 6 panel mosaic
30 minute exposure in Blue
There was rotator position slippage during these frames
30 minute exposure in Green
30 minute exposure in Red
180 minute exposure in Ha

Click here for full color version