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M101 is a large face on multiple spiral barred galaxy in Ursa Major ( The Plough ) .
M101 / Galaxy, type SB M | |
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R.A. | 14h 03m 26.437s (2000.0) |
Dec. | +54° 19' 22.76" (2000.0) |
Apparent Size | 28.5 x 28.3'' |
Radial Velocity | 241 km/s |
Magnitude | +7.72 |
Distance | 20-26 million light years |
Group of Galaxies | m101 group |
Other IDs | UGC8981, NGC 5457,PGC50063 UGC 6937,MCG 9-23-28 |
Scope | 135mm Canon Lens |
Mount | Vixen GP-DX unguided |
Exposure | 80 mins total , 80 x 1 min unguided. |
Post-processing | AA3, Dark framed,gradient removed. |
Filters | IR |
Camera | Starlight Express hx516 |
Location | Claines Top Observatory |
Date | 11th April 2005 |
First attempt at using a standard canon SLR lens attached to my hx516. The Astrovid adaptor had to
be lathed down such that the focal point could be reached. Very happy with this shot & will be able
to image M31 , M33 , M42 , the virgo cluster & others in one shot.
I had to 1/2 close the shutter manually, as too much light caused the stars to seriously pinch on one side.
No sharpening or any post processing on this image.
Weather cool , no moon, seeing average until the clouds rolled in.
The negative image shows a few local fainter galaxies in the M101 group.
Scope | 8" Intes Micro MN-86 with 0.5 Focal reducer |
Mount | EQ6 unguided |
Exposure | 33 mins total , 100 x 20 sec |
Post-processing | AA3, Dark framed,gradient removed, gentle DDP |
Filters | IR |
Camera | Starlight Express hx516 with ICX424AL chip |
Location | Claines |
Date | 11th July 2005 |