IC 4539

IC 4539 is a type SABb^[1] intermediate spiral galaxy located in Corona Borealis. Its redshift is 0.061307,^[2] which corresponds IC 4539 to be 845 million light-years from Earth.^[3] It has an apparent dimension of 0.40 x 0.4 arcmin, meaning the galaxy is about 95,000 light-years across.^[4] IC 4539 was discovered by Stephane Javelle on June 23, 1903, who found it "as faint, small, round with a very brighter middle."^[5][6]

IC 4539
Sloan Digital Sky Survey image of IC 4539
Observation data (J2000 epoch)
Constellation	Corona Borealis
Right ascension	15h 18m 31.15s
Declination	+32d 23m 34.27s
Redshift	0.061307
Heliocentric radial velocity	18,365 km/s
Distance	845 Mly (259.1 Mpc)
Apparent magnitude (V)	16.3
Apparent magnitude (B)	15.5
Surface brightness	13.4
Characteristics
Type	SB?, SABb
Apparent size (V)	0.40' x 0.4'
Other designations
MCG +06-34-003, PGC 54642, SIT 0129-1, IRAS F15165+3234