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Observation by NORMAN GRAY: Medusa Nebula (Sh2-274/Abell 21) - SHO N...

Uploaded by

NORMAN GRAY

Observer

NORMAN GRAY

Observed

2024 Jan 13 - 19:00

Uploaded

2025 Feb 24 - 18:11

Objects

Sharpless 274

Planetarium overlay









Constellation

Gemini

Field centre

RA: 07h28m
Dec: +13°16'
Position angle: -5°39'

Field size

0°30' × 0°32'

Equipment
  • Askar 151PHQ
  • ZWO ASI 2600MMpro (-20C)
  • 10micron GM3000HPS
  • ZWO 2" filter wheel - Ha (3nm), OIII (3nm), SII (3nm)- all (Chroma)
Exposure

120sec

Location

Stevenage, Hertfordshire

Target name

Medusa Nebula, Sh2-274, Abell 21

Title

Medusa Nebula (Sh2-274/Abell 21) - SHO NB

About this image

Collected over 14 nights from 13Jan - 02Mar 2024.

AstroPixelProcessor (APP) -stacking,  Pixinsight - AutoDBE, SPCC, (Pleiades Astrophoto), BlurXTerminator, NoiseXTerminator, StarXTerminator (Russell Croman Astrophotography),  Lightroom, Photoshop (Adobe) -processing

Imagery merged as an SHO image in Pixinsight.

The due to the faint nature of this nebula there was a problem with noise in the stacked image which delayed my final processing.  Ha was dominant followed by OIII  and then SII.  The OIII image was distinct from Ha and SII with a diffuse nebular centric disstribution.  As with my previous OSC image the latest version of NoiseXterminator allowed me to process the image to an acceptable quality.

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