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Antares - Rho Ophiuchi Complex

The Antares - Rho Ophiuchi Region in Scorpius is one of the most beautiful and colorful areas of the entire night sky.

It contains dark nebulae where lanes of obscuring dust hide background stars, blue reflection nebulae where the dust is illuminated by the reflected light of nearby stars, and red emission nebulae where the hot hydrogen gas itself is glowing and emitting light.

Also visible is a rare orange/yellow reflection nebula around Antares, the brightest star at right center in the image.

Exposure Data
  • Lens: Nikkor 180mm ED AIS manual focus with Fotodiox EOS adapter
  • Focal Length: 180mm
  • Focal Ratio: f/2.8
  • Exposure: 28 x 2min
  • Mount: Losmandy GM100EQ German equatorial mount
  • Guiding: ST-4 autoguided through 130EDT
  • Camera: Modified Canon EOS 1000D (Digital Rebel XS) DSLR
  • Mode: Raw
  • ISO: 1600
  • White Balance: Custom
  • In-Camera Noise Reduction: Off
  • Filter: CLS
  • Temp: 36F
  • Date: May 9, 2010
  • Start Time: 1:55 a.m. EDT
  • Location: Steelmantown, NJ
  • SQM Reading: 20.82
  • Seeing: Guide:A2s Wind:0 Dew:2 Clouds:0
  • Calibration: Master Dark, Master Bias in Images Plus
  • Processing: Aligned and stacked in Images Plus, processed in Photoshop CS5

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