Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  M 31, Great Nebula in Andromeda, NGC 224, M 32, NGC 221, M 110, NGC 205
Getting plate-solving status, please wait...
Experiment: M31 on a Goto Alt Az.  WITHOUT dark frames calibration, 





    
        

            Tej Dyal
Experiment: M31 on a Goto Alt Az.  WITHOUT dark frames calibration

Experiment: M31 on a Goto Alt Az. WITHOUT dark frames calibration

Technical card

Resolution: 4980x3140

Dates:Sept. 21, 2014

Frames: 15x26"

Integration: 0.1 hours

Avg. Moon age: 27.02 days

Avg. Moon phase: 6.95%

Astrometry.net job: 378163

RA center: 10.526 degrees

DEC center: 41.381 degrees

Pixel scale: 1.777 arcsec/pixel

Orientation: 121.710 degrees

Field radius: 1.453 degrees

Description

This is the second version of my experiment in which I am trying to determine the differences in noise reduction etc that adding dark frames have. This version is the stacking of subs WITHOUT dark frames.

I leave it to you to judge the difference between this and the calibrated version :)

However, an expert astrophotographer questions the quality of my dark frames. good point. So my experiment will continue :)

My full discussion on this is on the FLamsteed Astronomy Society forum:

http://flamsteed.info/forums/topic/my-week-in-dark-skies-brecon-beacon/page/3/#post-8429

As with the other image I am also trying to show here, that it is possible to image deep space objects with a Celestron Nexstar mount (a Goto Alt Az) despite the general concensus that goto Alt Az mounts are useless for deep space imaging. It is certainly not ideal but what I am trying to show here is that it is not THAT bad! For those that own a Goto Alt Az, give it a go. DSS will correct the field rotatation issue that Alt Az mounts have. the lower the imaging object's declination, the higher the exposure you can go.

This was 15 frames of 26 second exposures at ISO 6400.

Now this was taken reasonably dark skies in Brecon Beacon, Wales. But I will be adding some other images I had taken of nebulas and clusters in heavily light polluted London.

Comments

Author

IamTJ
Tej Dyal
License: None (All rights reserved)
1500
Like

Sky plot

Sky plot

Histogram

Experiment: M31 on a Goto Alt Az.  WITHOUT dark frames calibration, 





    
        

            Tej Dyal