Observation by NORMAN GRAY: Medusa Nebula (Sh2-274/Abell 21) - OSC

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NORMAN GRAY

Observer

NORMAN GRAY

Observed

2024 Jan 09 - 19:30

Uploaded

2025 Feb 24 - 17:04

Objects

Sharpless 274

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Constellation

Gemini

Field centre

RA: 07^h28^m
Dec: +13°17'
Position angle: -20°18'

Field size

0°29' × 0°31'

Equipment

Takahashi FSQ-106EDX4
ZWO ASI2600MCpro (-20C)
RainbowAstro RST135 (equatorial mode)
2" LoGlow filter (Chroma)

Exposure

120sec, Gain 100, offset 50

Location

Stevenage, Hertfordshire

Target name

Sh2-274, Abell 21, Medusa Nebula

Title

Medusa Nebula (Sh2-274/Abell 21) - OSC

About this image

Collected over 10 nights from 9Jan - 18Feb 2024.

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

The due to the faint nature of this nebula there was a problem with noise in the stacked image which delayed my final processing. The latest version of NoiseXterminator allowed me to process the image to an acceptable quality.

The central star WISEA J072902.72+131448.6 (pale blue dot) is clearly visible. This is an unusual star, referred to as a PG 1159 type and possesses a hydrogen-deficient atmosphere and is transitioning between the central star of a planetary nebula to being a hot white dwarf.

Files associated with this observation

Sh2_274_OSC_blend-2-2.jpg (874.0 kB)

Like this image

Dominic Ford, Simon Paul Davis, Graham Winstanley, Brendan Tynan, Manolo_Rodriguez, Mike Greenhill-Hooper

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