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Distant and ancient SPT0615-JD.jpg
SPT0615-JD (closer detailled image) using the NASA/ESA Hubble Space Telescope (the galaxy is located towards the upper left, to the right of the group of two stars and one galaxy)
Observation data
ConstellationPictor [1]
Redshift9.9 [2]
Distance13.27 [2]
Mass~3 ×109 [3] M
Size< 2,500 ly [3]

SPT0615-JD is a galaxy situated within the constellation Pictor, and is the farthest galaxy ever imaged by means of gravitational lensing .[1][2] Brett Salmon of the Space Telescope Science Institute in Baltimore was the lead scientist of the study of the galaxy.[3]

The galaxy was identified in the Hubble telescope Reionization Lensing Cluster Survey (RELICS) and companion S-RELICS Spitzer program and is at the limits of Hubble's detection capabilities.[3] As a consequence of the effect of a gravitational field of a galaxy cluster of an extremely large size,[3] SPT-CL J0615-5746, (abbreviated to SPT0615),[1] situated at a distance closer to earth, light from SPT0615-JD located at a further distance, is amplified and distorted (lensed - Einstein 1936; Khvolson 1924; Link 1936) on its motion to the Hubble telescope. This distortion causes the light from the galaxy to arrive as an image lengthened to an arc of about 2 arcseconds long.[3]

"JD" is short for "J-band Dropout" (the galaxy is not detected in the so-called J-band (F125W)[4] The observed image is of 13.3 billion years ago, indicating the galaxy existed when the universe was about only 500 million years in existence.[3] The galaxy is less than 2,500 light-years across.[3]


  1. ^ a b c I. Karachentsev et al., F. High et al. - Distant and ancient Hubble Space telescope Retrieved 2019-06-10
  2. ^ a b c Salmon, Brett; Coe, Dan; Bradley, Larry; Bradač, Marusa; Huang, Kuang-Han; Strait, Victoria; Oesch, Pascal; Paterno-Mahler, Rachel; Zitrin, Adi; Acebron, Ana; Cibirka, Nathália; Kikuchihara, Shotaro; Oguri, Masamune; Brammer, Gabriel B; Sharon, Keren; Trenti, Michele; Avila, Roberto J; Ogaz, Sara; Andrade-Santos, Felipe; Carrasco, Daniela; Cerny, Catherine; Dawson, William; Frye, Brenda L; Hoag, Austin; Jones, Christine; Mainali, Ramesh; Ouchi, Masami; Rodney, Steven A; Stark, Daniel; Umetsu, Keiichi (2018). "A Candidate z∼10 Galaxy Strongly Lensed into a Spatially Resolved Arc". The Astrophysical Journal. 864: L22. arXiv:1801.03103. doi:10.3847/2041-8213/aadc10.
  3. ^ a b c d e f g h (January 11, 2018) NASA's Great Observatories Team Up to Find Magnified and Stretched Image of Distant Galaxy Jet Propulsion Laboratory, Pasadena, California, Retrieved 2019-06-10
  4. ^ Daniel Coe with CLASH (PI Marc Postman) - Hubble Spies Most Distant Galaxy Yet Retrieved 2019-06-10