Gravitationally Lensed Quasar Q0957+561 (Pawel Zgrzebnicki)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa)

Gravitationally Lensed Quasar Q0957+561

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

Gravitationally Lensed Quasar Q0957+561

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

"The Twin Quasar (also known as Twin QSO, Double Quasar, SBS 0957+561, TXS 0957+561, Q0957+561 or QSO 0957+561 A/B), was discovered in 1979 and was the first identified gravitationally lensed object. It is a quasar that appears as two images, a result from gravitational lensing caused by the galaxy YGKOW G1 that is located in the line of sight between Earth and the quasar. [...] Slight spectral differences between quasar A and quasar B can be explained by different densities of the intergalactic medium in the light paths, resulting in differing extinction. 30 years of observation made it clear that image A of the quasar reaches earth about 14 months earlier than the corresponding image B, resulting in a difference of path length of 1.1 ly."

Source: https://en.wikipedia.org/wiki/Twin_Quasar

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Status	Advanced success
Started	...
Astrometry.net job	3374782
PixInsight job	FQS5S9GC9EYC5RYILAAMUBUC6X73WG9L
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	10h01m23s.178
RA (top/left)	10h01m59s.198
RA (top/right)	10h01m54s.126
RA (bottom/right)	10h00m46s.917
RA (bottom/left)	10h00m52s.366

Dec (center)	+55°54′22″.69
Dec (top/left)	+55°47′52″.94
Dec (top/right)	+56°01′22″.33
Dec (bottom/right)	+56°00′51″.65
Dec (bottom/left)	+55°47′22″.26

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Gravitationally Lensed Quasar Q0957+561

Gravitationally Lensed Quasar Q0957+561

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Gravitationally Lensed Quasar Q0957+561

Gravitationally Lensed Quasar Q0957+561

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