Observation by Ian Sharp: M81 and M82 - 78.5 Hours Exposure

Uploaded by

Mr Ian David Sharp

Observer

Ian Sharp

Observed

2021 Apr 25 - 00:00

Uploaded

2021 Nov 10 - 12:14

Objects

M81
M82

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Constellation

Ursa Major

Field centre

RA: 09^h55^m
Dec: +69°17'
Position angle: +88°38'

Field size

1°04' × 0°51'

Equipment

StellaMira 104mm ED2 Triplet f/6.25 APO Refractor
Starlight XPress TRIUS PRO 694 mono CCD camera
10Micron GM 1000 HPS mount
Starlight Xpress 7 position 1.25" filter wheel
Optolong LRGB, Ha, OIII, SII filters
Starlight XPress OAG
Starlight Xpress LoadStar V2 guide camera

Exposure

Total of 78.5 hours

Location

PixelSkies, Castilléjar in the province of Granada, Andalucia

Target name

M81 and M82

Title

M81 and M82 - 78.5 Hours Exposure

About this image

Here is the deepest image I have ever processed, taken with my remote setup in Spain. Images were captured in April and May 2012.

Exposures : Red 112 x 300s, Green 112 x 300s, Blue 98 x 300s, Luminance 287 x 300s, HA 83 x 1200s

All calibrated with bias, dark and flat frames. All processing in PixInsight. Telescope control and image acquisition with Sequence Generator Pro. Guiding by PHD2 software.

More details are here: http://www.astro-sharp.com/2021/11/10/78-5-hours-exposure-on-m81-and-m82/

Pictures of the equipment are here: http://www.astro-sharp.com/2021/10/23/my-new-remote-setup-in-spain/

Files associated with this observation

M81M82_PixelSkies_IDS_2400px.jpg (1.6 MB)

Like this image

Nik Szymanek, Ron Arbour, Martina McGovern, Tim Haymes, Manolo_Rodriguez, Callum Potter, Grant Privett, Graham Winstanley, Tor Schofield, Peter Carson, Philip Jennings, Callum Wingrove, Dr Paul Leyland, Ian Jarrett

Comments

Grant Privett, 2021 Nov 11 - 19:26 UTC

Serious question: has anyone on the BAA website had a longer exposure than this?

Mr Ian David Sharp, Dr Paul Leyland

Mr Ian David Sharp, 2021 Nov 14 - 03:05 UTC

Interestingly, the number of exposures before rejection was about 98 hours!

Dr Paul Leyland, 2021 Nov 29 - 17:12 UTC

Some of the GCs show up nicely as orange "stars".

Mr Ian David Sharp

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