NGC 6782

NGC 6782 is a barred spiral galaxy located in the southern constellation of Pavo, at a distance of approximately 173 megalight-years from the Milky Way.^[3] It was discovered on July 12, 1834 by English astronomer John Herschel. John L. E. Dreyer described it as, "considerably faint, considerably small, round, a little brighter middle, 9th magnitude star to south".^[7] The morphological classification of NGC 6782 is (R₁R′₂)SB(r)a, indicating a barred spiral galaxy with a multiple ring system and tightly-wound spiral arms.^[5] It is seen nearly face-on,^[8] being inclined by an angle of 27.2°±0.2° to the line of sight from the Earth.^[5]

NGC 6781
A Hubble Space Telescope (HST) image of NGC 6782.
Observation data (J2000 epoch)
Constellation	Pavo
Right ascension	19h 23m 57.935s[1]
Declination	−59° 55′ 21.04″[1]
Redshift	0.012462±0.000123[2]
Heliocentric radial velocity	3,736 km/s[3]
Distance	173 Mly (53 Mpc)[3]
Apparent magnitude (V)	11.8[4]
Characteristics
Type	(R1R′2)SB(r)a[5]
Apparent size (V)	1′.197 × 0′.814[1] (NIR)
Other designations
LEDA 63168, ESO 142-1, 2MASX J19235793-5955210, NGC 6782, PGC 63168[6]

At the galactic core is an almost circular nuclear ring at the inner Lindblad resonance. This is attached to the primary bar, which extends out to a somewhat pointy, diamond-shaped inner ring. It is actually a double-barred galaxy, with an interior bar inside the nuclear ring. A pair of faint spiral arms extend out from the inner ring to the outer parts of the galaxy, where it joints a double outer ring system.^[5] Both inner rings of the galaxy are undergoing star formation, producing hot OB stars, with little star formation occurring in the remainder.^[8]