M51 + SN 2011dh (Galaxy)
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Also known as: Whirlpool galaxy
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Right ascension: 13h 30m
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Declination: 47° 8'
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Constellation: Ursa Major
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Date/time: 2011.06.21 21:30 UT
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Equipment: 12" f/5 Newtonian
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FoV: 25'
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Magnification and filter(s): 167x
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Seeing: 6/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
Today was the Summer solstice, so it's not surprising that even at 11pm the Western horizon is still shining in bluish colour, however at East the hazy patch of the Summer Milkyway is already easily noticeable. The spiral structure of the M51 is readily visible at 71x, surprisingly easy and so is the supernova SN2011dh, which I estimate to be at 12.3m and is located in the middle of a large outer spiral arm towards ESE from the galactic core. At such a high brightness this supernova is possibly one of the brightest for this year, at a very easy position for Northern hemisphere observers also with much smaller scopes.
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Hi-resolution image: [ reversed sketch | original sketch ]
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