Hemisphere:  Northern  ·  Contains:  M 60  ·  M60  ·  NGC 4637  ·  NGC 4638  ·  NGC 4647  ·  NGC 4649  ·  NGC4637  ·  NGC4638  ·  NGC4647
Getting plate-solving status, please wait...
M60 galaxy / neighbor NGC4647 - short exposures trial -, 



    
        

            Wanni
Powered byPixInsight

M60 galaxy / neighbor NGC4647 - short exposures trial -

Imaging telescopes or lenses: Meade LX200 8" GPS

Imaging cameras: Atik Cameras Atik 383 L+ Color

Mounts: Meade Equatorial Wedge on Tripod

Guiding telescopes or lenses: Meade ETX70-AT

Guiding cameras: Meade DSI Pro

Software: Fitswork4  ·  Artemis capture


Dates:April 19, 2020

Frames: 360x10" -20C bin 1x1

Integration: 1.0 hours

Darks: ~180

Avg. Moon age: 26.30 days

Avg. Moon phase: 11.36%

Temperature: 9.00


Astrometry.net job: 3435572

RA center: 12h 43' 42"

DEC center: +11° 33' 50"

Pixel scale: 1.163 arcsec/pixel

Orientation: -179.755 degrees

Field radius: 0.298 degrees


Resolution: 1440x1159

Locations: Home Observatory, Syke, Niedersachsen, Germany

Data source: Backyard

Description

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

Comments

Author

wanni60
Wanni
License: None (All rights reserved)
620
Like

Revisions

  • Final
    M60 galaxy / neighbor NGC4647 - short exposures trial -, 



    
        

            Wanni
    Original
  • M60 galaxy / neighbor NGC4647 - short exposures trial -, 



    
        

            Wanni
    C

C

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

Sky plot

Sky plot

Histogram

M60 galaxy / neighbor NGC4647 - short exposures trial -, 



    
        

            Wanni

In these public groups

"Nordish by nature"