British Astronomical Association
Supporting amateur astronomers since 1890

BAA Images Picture of the week

Observation by Martina McGovern: Messier 81 in Ursa Major

Uploaded by

Paul Downing, FRAS

Observer

Martina McGovern

Observed

2020 Nov 23 - 23:00

Uploaded

2020 Dec 12 - 10:36

Objects

M81

Planetarium overlay









Constellation

Ursa Major

Field centre

RA: 09h55m
Dec: +69°04'
Position angle: +78°15'

Field size

0°30' × 0°20'

Equipment
  • Celestron Edge HD 8” SCT, SkyWatcher HEQ5 PRO
  • ZWO ASI294MC Pro, main camera
  • ZWO ASIAir Pro, ZWO EAF (Electronic Automatic Focuser) & Dual-Speed 2-inch Crayford Focuser for SCT’s
  • ZWO 60mm Guide scope, ZWO ASI120MM mini, Guide camera
  • Optolong L-Pro Broadband filter, Optolong L-eXtreme dual band filter (Ha & OIII)
Exposure

Approx 5hrs of L-pro data & 40mins L-eXtreme data; 180s & Darks, Flats & Dark flats. Camera settings were Gain 225, cooled to T -15C

Location

Near Cambridge, UK

Target name

Messier 81

Title

Messier 81 in Ursa Major

About this image

Martina comments that she hasn’t had a clear night in so so long – until 22nd November, so she stayed up right through until 6am the next day.  She has wanted to try to capture this galaxy image for a while now, and success at last.

 

From Wikipedia: M81 Bodes Galaxy is a grand design spiral galaxy about 12 Million light years away, with a diameter of 90,000 light years, in the constellation Ursa Major. Due to its proximity to Earth, large size, and active galactic nucleus (which harbours a supermassive black hole), Messier 81 has been studied extensively by professional astronomers.

Files associated with this observation
Like this image
Comments
Test User
Test User, 2020 Dec 13 - 00:41 UTC

Lovely image!

Callum Potter
Callum Potter, 2020 Dec 13 - 12:46 UTC

That's a very nice image of M81 - captures the subtlety of the structure in the spiral arms nicely.

Martin Lewis
Martin Lewis, 2020 Dec 13 - 23:37 UTC

Well-deserved POTW Martina

Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of work by third parties is expressly forbidden without the consent of the copyright holder. By submitting images to this online gallery, you grant the BAA permission to reproduce them in any of our publications.