SDSS J114816.64+525150.3

SDSS J114816.64+525150.3 (J1148+5251) was the most distant known quasar when it was discovered in 2003, at redshift Z=6.419.^[2] The quasar is powered by a 3 billion solar mass supermassive black hole.^[3]

SDSS J114816.64+525150.3
SDSS J114816.64+525150.3 captured by Two Micron All Sky Survey
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[1]
See also: Quasar, List of quasars

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".^[4]

See also

• List of the most distant astronomical objects