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, The star νAnd, The star 32And, The star ρAnd, The star θAnd

Image of the day 04/08/2013

Getting plate-solving status, please wait...
    M31 & Comet Pan-STARRS for 6 consecutive days, 


    M31 & Comet Pan-STARRS for 6 consecutive days

    Technical card

    Resolution: 2048x1365

    Dates:April 6, 2013

    Frames: 200x60"

    Integration: 3.3 hours

    Avg. Moon age: 25.63 days

    Avg. Moon phase: 16.25% job: 86879

    RA center: 8.199 degrees

    DEC center: 41.221 degrees

    Pixel scale: 14.940 arcsec/pixel

    Orientation: 122.101 degrees

    Field radius: 5.106 degrees


    Camera: Canon 500D
    Lens: Day 1-2: EF-85mm & DSS 2x drizzle, f/4, iso 800, 60 seconds
    Day 3-6: EF-200mm 2.8L, f/3.5, iso 800, 60 seconds
    Mount: HL-1
    Filter: Astronomik CLS-ccd filter
    Software used: DSS, PixInsight, PS
    Location: Leicester, UK

    Day 2 -6 are all stacked onto day 1's. Thus form this image.
    The comet should appear to be dimmer each day, however, this phenomenon does not appear on this image because
    1) I have used 85mm and DSS 2x drizzle for the first 2 days, hence a rather low S-N ratio, whereas for day 3-5, I have used 200mm 2.8L therefore a rather hgih S-N ratio.
    2) I used f/4 for the first 2 days and f/3.5 for day 3-5, this caused the brightness difference
    3) PS technique was not so familiar for the first 2 days
    4) Number of frames for day 1-2 were <25 and for day 3-4 >40... this provides the high S-N ratio
    M31 is enhanced with a photo taken back in Sept2012 in Yinna Hill, China



    License: None (All rights reserved)

    Sky plot

    Sky plot


    M31 & Comet Pan-STARRS for 6 consecutive days,