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SDSS J1038+4849 Smiling lens

Technical card

Imaging telescope or lens: CELESTRON Edge HD 800

Imaging camera: Atik 460ex

Mount: Sky-Watcher EQ8

Guiding telescope or lens: CELESTRON Edge HD 800

Guiding camera: Starlight Xpress Lodestar-C

Focal reducer: Celestron EdgeHD 8 0.7x Reducer

Software: Absoft Neat ImagePHD guidingPhotoshop CC

Filters: GBRL

Accessories: Starlight Xpress OAGStarlight Xpress SX USB Filter Wheel 5x2"

Resolution: 2390x1594

Dates: March 25, 2017

B: 14x600"
G: 16x600"
L: 158x600"
R: 16x600"

Integration: 34.0 hours

Avg. Moon age: 26.23 days

Avg. Moon phase: 11.85% job: 1531553

RA center: 159.679 degrees

DEC center: 48.822 degrees

Pixel scale: 0.621 arcsec/pixel

Orientation: -130.193 degrees

Field radius: 0.248 degrees


After seeing beautiful images of this objet from Josh Smith and Detlef Hartmann, I had to try it myself. My image is a bit disappointing but I could not convince myself to throw away all that exposure time.

The two eyes of the smiling face are galaxies 4.5 billions light years from Earth. Their strong gravitationnal field bends space-time and distort light coming from galaxies behind.

I included an image from the Hubble Space Telescope for comparison.




Sky plot

Sky plot


SDSS J1038+4849 Smiling lens , AstroGG