Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  NGC 3073  ·  NGC 3079
Q0957+561, twin Quasar by gravitational lens, 



    
        

            UN73
Q0957+561, twin Quasar by gravitational lens
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Q0957+561, twin Quasar by gravitational lens

Q0957+561, twin Quasar by gravitational lens, 



    
        

            UN73
Q0957+561, twin Quasar by gravitational lens
Powered byPixInsight

Q0957+561, twin Quasar by gravitational lens

Technical card

Imaging telescopes or lenses: Skywatcher 150/750 Explorer PDS BD

Imaging cameras: Canon EOS 80 D  ·  Canon EOS 70 D mod

Mounts: Skywatcher AZ-EQ6 PRO

Guiding telescopes or lenses: Guidescope 50/180

Guiding cameras: ZWO ASI 120 MM

Software: Astro Pixel Processor  ·  Photoshop CS6

Accessory: GPU KomakorrF4


Dates:March 18, 2020March 28, 2020

Frames:
6x210" (21')
24x240" (1h 36')

Integration: 1h 57'

Avg. Moon age: 13.93 days

Avg. Moon phase: 21.86%


Basic astrometry details

Astrometry.net job: 3505948

RA center: 10h 1' 38"

DEC center: +55° 45' 28"

Pixel scale: 1.100 arcsec/pixel

Orientation: 339.177 degrees

Field radius: 0.367 degrees


Resolution: 2000x1333

Locations: Leebergwiese, Großmugl, Austria; Ebenwaldhöhe, Kleinzell, Austria

Data source: Traveller

Description

Strongly cropped this seems to be the sensible limit of my setup.
The enlargement in the pic has been drizzled.

The twin Quasar Q0957+561 in Ursa Major is actually one Quasar where a gravitational lens produces two images of the Quasar. Light distance travel is around 9 billion years. The difference of the light travel time of both Quasar images is 1,14 years. Their magnitudes are 16.5 and 16.7, they are 6" apart. The main component of the gravitational lens is a galaxy cluster with a light travel time of around 4 billion years. It is invisible in the pic with the brightest galaxy being 21.9 mag.

Although the picture itself is unspectacular, I´m quite thrilled of being able to capture the effect of a gravitational lens and an object that is in such an enormous distance.

Comments

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Q0957+561, twin Quasar by gravitational lens, 



    
        

            UN73