Hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  IC 4263  ·  M 51  ·  NGC 5169  ·  NGC 5173  ·  NGC 5194  ·  NGC 5195  ·  NGC 5198  ·  Whirlpool galaxy
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Messier Object 51 - Whirlpool Galaxy, 


Messier Object 51 - Whirlpool Galaxy
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Messier Object 51 - Whirlpool Galaxy

Technical card

Imaging telescopes or lenses: Stellarvue SV105

Mounts: Takahashi EM-200 Temma2

Guiding telescopes or lenses: Orion ST 80

Software: PHD guiding  ·  PixInsight  ·  Nebulosity

Filters: Hutech IDAS LPS P2 2"

Dates:June 4, 2010

Frames:Hutech IDAS LPS P2 2": 1x2400" -25C bin 1x1

Integration: 0.7 hours

Avg. Moon age: 21.77 days

Avg. Moon phase: 54.00%

Basic astrometry details

Astrometry.net job: 98525

RA center: 13h 30' 0"

DEC center: +47° 12' 14"

Pixel scale: 2.299 arcsec/pixel

Orientation: 88.334 degrees

Field radius: 0.718 degrees

Resolution: 620x392


This image depicts the larger spiral galaxy (M51) and its smaller companion galaxy (NGC 5195). These galaxies are of particular interest because they are interacting with one another due to an actual collision approximately 600 million years ago. You can see the elongated "tail" of the spiral galaxy as its smaller companion distorts the outermost parts of the structure. Of interest here is that this is a likely fate for our own Milky Way and the Andromeda Galaxy. These two galaxies are expected to collide in about 3 billion years. Our Sun will still be alive by then, but much nearer to the end of its life (and the inevitable red-giant phase).

These galaxies are located in the constellation Canes Venatici some 27 million light years distant. Despite its official location, this galaxy pair is very close the the "crook" of the Big Dipper (Mizar) in the north.

Also of note here is that this image was originally intended as a test of the new EM-200, but this single frame turned out ok, I think.


Sky plot

Sky plot


Messier Object 51 - Whirlpool Galaxy,