2026-07-07:  LDN183

I imaged LDN183 with a Stellarvue SV80ST air spaced apochromat with 0.8x focal reducer and field flattener.  The effective focal length was 384 mm at F/4.8.  The imaging camera was a ZWO ASI2600MC pro cooled to 0C at a gain of 100.  It was off-axis guided by a QHY LII camera and controlled with PHD2.  The system was mounted on a Celestron Advanced VX equatorial head and controlled through Sequence Generator Pro 4.5. 

The image consists of 32 frames x 5 minutes for a total exposure time of 2 hours 40 minutes.  Calibration was done with 16 bias, dark and flat frames.  The image was processed in PixInsight 1.9.4.

It was taken at Starry Meadows during the 2026 Rocky Mountain Star Stare, hosted by the Astronomical Society of Colorado Springs.  The dark sky site is located northwest of Gardner at an altitude of 2300 meters or 7,600 feet.

<Plate Solve>

Creation software ........ PixInsight 1.9.4 / ImageSolver 6.4.2 (Windows)

Projection origin ........ [3084.571658 2036.063871] px -> [RA: 15 55 38.437 Dec: -2 54 13.21]

Resolution ............... 1.999 arcsec/px  Rotation ................. 5.882 deg

Observation start time ... 2026-06-13 04:26:16 UTC  end time ..... 2026-06-13 07:15:58 UTC

Geodetic coordinates ..... 105 11 32 W 37 50 33 N 2294 m

Focal distance ........... 388.03 mm  Pixel size ............... 3.76 um

Field of view ............ 3d 25' 27.9" x 2d 15' 38.6"

Image center ............. RA: 15 55 38.437 Dec: -2 54 13.21 ex: +0.009137 px ey: +0.216197 px