Observation by Dean Ashton: The M81 Group over 3-Years

Uploaded by

Dean Ashton

Observer

Dean Ashton

Observed

2023 Mar 24 - 15:53

Uploaded

2023 Mar 24 - 16:06

Objects

M81
M82

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Constellation

Ursa Major

Field centre

RA: 09^h55^m
Dec: +69°18'
Position angle: +89°46'

Field size

1°00' × 0°42'

Equipment

Celestron 9.25 EdgeHD at /f7
QHY268C Camera
Optolong L-Pro, Optolong L-eNhance and Optolong L-eXtreme Filters
Celestron CGEM mount.

Exposure

/f7 195x600s

Location

St Austell, Cornwall

Target name

Bodes Galaxy & Cigar Galaxy

Title

The M81 Group over 3-Years

About this image

Three of the M81 group galaxies including the M81 irregular satellite galaxy UGC5336 or Holmberg IX. This is a 2-panel mosaic with a total integration time of 32.5 hours. Sub-frames have been taken in January, February and March of 2021, 2022 and 2023. The Cornish weather makes collecting long exposures tricky. The answer is to be patient and collect more data each year and build up the image.

The majority of light sub-frames were taken using an Optolong L-Pro filter for the broad RGB images. Optolong L-eNhance and L-eXtreme filters were also used, particularly with M82, to emphasise the hydrogen-alpha emission regions of the galaxies.

All calibration, integration, processing and mosaic building was completed with PixInsight.

Files associated with this observation

M81_M82_195x600s_DAshton.jpg (2.0 MB)

Like this image

Manolo_Rodriguez, Ron Morley, Jonathon Elliott, Ron Johnson, Simon Paul Davis, Graham Winstanley, Martina McGovern

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