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Contains:  NGC 3079, NGC 3073
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NGC 3079 and Twin Quasar QSO 0957+561A/B, 


            Robert Eder
NGC 3079 and Twin Quasar QSO 0957+561A/B

NGC 3079 and Twin Quasar QSO 0957+561A/B

Technical card

Resolution: 1721x1314

Dates:May 24, 2019

30x180" ISO800
Castell H-Alpha 2": 5x180" ISO3200

Integration: 1.8 hours

Darks: ~20

Flats: ~40

Bias: ~100

Avg. Moon age: 20.19 days

Avg. Moon phase: 70.22% job: 2711707

RA center: 150.383 degrees

DEC center: 55.798 degrees

Pixel scale: 1.576 arcsec/pixel

Orientation: 319.694 degrees

Field radius: 0.474 degrees

Locations: Sofienalpe, Vienna, Austria

Data source: Traveller


NGC 3079 is a nice little barred spiral galaxy in the constellation Ursa Major. This is nothing special, if there weren't about 10 arcminutes north two small dots.
This is the twin quasar Q0957 + 561A/B, which appears double by a gravitational lens. Distance 7.8 billion light-years (almost twice as far away as the age of our solar system).
They were discovered in 1979 and it was the first proof that Einstein was right. The light of "A" arrives 417 days earlier than that of "B".
It is said to be one of the farthest objects that can be seen with an amateur telescope 😃



Robert Eder
License: None (All rights reserved)

Sky plot

Sky plot


NGC 3079 and Twin Quasar QSO 0957+561A/B, 


            Robert Eder