M60 galaxy / neighbor NGC4647 - short exposures trial - (Wanni)

Celestial hemisphere: Northern · Constellation: Virgo (Vir) · Contains: M 60 · NGC 4637 · NGC 4638 · NGC 4647 · NGC 4649

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M60 galaxy / neighbor NGC4647 - short exposures trial -

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M60 galaxy / neighbor NGC4647 - short exposures trial -

Following up my trials on relativ short exposures of deep space objects,

this is another intermediate result :

All in all my feeling is I should increase from now 10sec to 20sec, in order to get

very dim objects, like NGC464, out of the noise.

short exposures advantages are clear :

- forgiving of guiding errors, cleanup of bad seeing conditions or satellite crossings

typically 10% subs in total

- possibility for ALT/AZ mounts to image deep space objects : Dobson telescopes etc.

the disadvantage :

- at least for my camera setup, it takes 10 sec for exposure and 10 sec. for download

of one image. So in fact doubling the telescope time.

and not to forget we need at least 50% of dark images : very important for short exposures!

flats didn't really help

- not to forget vast amount of disk space required

Final
Original
C

C

Description: Many thank's to Johny, I guess it's better now!

Uploaded: ...

"Nordish by nature"

Deep Space : Galaxies
Messier object catalog : 48 of 110

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Status	Advanced success
Started	...
Astrometry.net job	3435572
PixInsight job	V5G9FTHY4KM0Z61FPKJK12YP6YBD2V7S
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	12h43m42s.60
RA (top/left)	12h44m39s.73
RA (top/right)	12h42m45s.85
RA (bottom/right)	12h42m45s.39
RA (bottom/left)	12h44m39s.43

Dec (center)	+11°33′50″.0
Dec (top/left)	+11°22′39″.4
Dec (top/right)	+11°22′31″.9
Dec (bottom/right)	+11°45′00″.2
Dec (bottom/left)	+11°45′07″.2

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M60 galaxy / neighbor NGC4647 - short exposures trial -

M60 galaxy / neighbor NGC4647 - short exposures trial -

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M60 galaxy / neighbor NGC4647 - short exposures trial -

M60 galaxy / neighbor NGC4647 - short exposures trial -

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