NGC 6753

NGC 6753 is a massive^[5] unbarred spiral galaxy,^[5] seen almost exactly face-on, in the southern constellation of Pavo.^[6] It was discovered by the English astronomer John Herschel on July 5, 1836.^[9] The galaxy is located at a distance of 142 million light years from the Milky Way,^[5] and is receding with a heliocentric radial velocity of 3,140 km/s.^[4] It does not display any indications of a recent interaction with another galaxy or cluster.^[5]

NGC 6753
NGC 6753 imaged by the Hubble Space Telescope[1]
Observation data (J2000 epoch)
Constellation	Pavo
Right ascension	19h 11m 23.635s[2]
Declination	−57° 02′ 58.44″[2]
Redshift	0.010421±0.000087[3]
Heliocentric radial velocity	3,140 km/s[4]
Distance	142 Mly (43.6 Mpc)[5]
Apparent magnitude (V)	11.9[6]
Apparent magnitude (B)	11.84[7]
Characteristics
Type	(R)SA(r)b[8]
Mass	~1013[5] M☉
Apparent size (V)	2′.4 x 2′.1[6]
Other designations
NGC 6753, PGC 62870[7]

The morphological class of NGC 6753 is (R)SA(r)b,^[8] indicating it is a spiral without an inner bar feature (SA), displaying outer (R) and inner (r) ring structures, and moderately wound spiral arms. It is being viewed nearly face-on with a galactic plane inclination by 30° to the line of sight from the Earth.^[5] The galaxy is flocculent in appearance with a prominent central region.^[8] The virial mass of the galaxy is ~1×10¹³ M_☉, while the stellar mass is 3.2×10¹¹ M_☉. It has a star formation rate of 15.5 M_☉·yr⁻¹, which is confined to a radius of 15 kpc around the core.^[5] The most active region of star formation is the inner ring.^[10] It has a hot, X-ray luminous corona^[6] that extends out to a radius of 50 kpc.^[5]

Supernovae

Three supernovae have been discovered in NGC 6753:

• SN 2000cj was discovered by Robert Evans on May 14, 2000. It was positioned against a spiral arm at an offset 35″ east and 19″ south of the galaxy nucleus.^[11] The spectrum showed this to be a Type Ia supernova.^[12]
• On May 13, 2005, Type Ic supernovae SN 2005cb was spotted by the Brazilian Supernovae Search team.^[13] It was offset 16″ west and 19″ north of the nucleus and reached a peak magnitude of 15.6.^[14]
• The Type II-P supernova SN 2019mhm was discovered by the BOSS team on August 2, 2019. This transient was spotted close to maximum with a magnitude of 16.6, but showed no radio emission.^[15][16]

See also

• List of NGC objects (6001–7000)