SDSS J114816.64+525150.3

Observation data (Epoch )
Constellation	Ursa Major
Right ascension	11h 48m 16.64s
Declination	52° 51′ 50.3″
Redshift	6.419
Apparent magnitude (V)	25.53
See also: Quasar, List of quasars

SDSS J114816.64+525150.3 (J1148+5251) was the most distant known quasar when it was discovered in 2003, at redshift Z=6.419. The quasar is powered by a 3x10⁹ solar mass supermassive black hole.

Imaging with amateur-grade telescope

The Virtual Telescope Project imaged the quasar between March and April 2024, with a 350-millimeter (14 in) Celestron Schmidt–Cassegrain telescope, on a Software Bisque Paramount ME robotic mount. A total of 81, 300-second exposures were combined, for a total of almost 7 hours of exposure, recording sources as faint as about magnitude R=25. The team termed it "the most distant quasar observable at visible wavelengths".

See also

• List of the most distant astronomical objects

References

Sources

• Bertoldi, F.; Cox, P.; Neri, R.; Carilli, C.L.; Walter, F.; Omont, A.; Beelen, A.; Henkel, C.; Fan, X.; Strauss, Michael A.; Menten, K.M. (2003), "High-excitation CO in a quasar host galaxy at z=6.42", Astron.Astrophys., 409: L47–L50, doi:10.48550/arXiv.astro-ph/0307408, We report the detection of high excitation CO emission from the most distant quasar currently known, SDSS J114816.64+525150.3 ...
• Willott, Chris J.; McLure, Ross J.; Jarvis, Matt J. (April 2003), "A 3×109 Msolar Black Hole in the Quasar SDSS J1148+5251 at z=6.41", The Astrophysical Journal, 587 (1): L15–L18, doi:10.1086/375126
• Masi, Gianluca (April 15, 2024), The Virtual Telescope Project makes a record setting observation at the edge of the Universe.

External links

• Williams, Matt (March 16, 2024). "Little Red Dots in Webb Photos Turned Out to Be Quasars". Universe Today.