| NGC 6782 | |
|---|---|
 NGC 6782 imaged by the Hubble Space Telescope | |
| 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] | |
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]
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]
IC 4845 group
NGC 6782 is a member of the IC 4845 galaxy group (also known as LGG 427), which contains 14 members, including NGC 6739, NGC 6746, NGC 6769, NGC 6770, IC 4827, IC 4828, IC 4831, IC 4838, IC 4842, IC 4845, IC 4866, and ESO 141-21.[9][10]
Gallery
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Structure of NGC 6782 -
NGC 6782 with legacy survey -
NGC 6782 Barred Spiral Galaxy (Full Color)
See also
- Messier 94 - a similar spiral galaxy
References
- ^ a b c Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708. ISSN 0004-6256. S2CID 18913331.
- ^ de Vaucouleurs, G.; et al. (1976). Second Reference Catalog of Bright Galaxies. Austin: University of Texas Press. ISBN 978-0-292-75509-3.
- ^ a b c Crook, Aidan C.; et al. (February 2007). "Groups of Galaxies in the Two Micron All Sky Redshift Survey". The Astrophysical Journal. 655 (2): 790–813. arXiv:astro-ph/0610732. Bibcode:2007ApJ...655..790C. doi:10.1086/510201. S2CID 11672751.
- ^ "NASA/IPAC Extragalactic Database". Results for NGC 6782. Retrieved 2007-03-30.
- ^ a b c d Lin, Lien-Hsuan; et al. (September 2008). "Hydrodynamical Simulations of the Barred Spiral Galaxy NGC 6782". The Astrophysical Journal. 684 (2): 1048–1061. arXiv:0805.3613. Bibcode:2008ApJ...684.1048L. doi:10.1086/590247. S2CID 12620956.
- ^ "NGC 6782". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-10-06.
- ^ Seligman, Courtney. "NGC Objects: NGC 6750 - 6799". Retrieved 2020-10-03.
- ^ a b Eskridge, Paul B.; et al. (April 2003). "Ultraviolet-Optical Pixel Maps of Face-on Spiral Galaxies: Clues for Dynamics and Star Formation Histories". The Astrophysical Journal. 586 (2): 923–938. arXiv:astro-ph/0211494. Bibcode:2003ApJ...586..923E. doi:10.1086/367820. S2CID 18725775.
- ^ Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47. Bibcode:1993A&AS..100...47G.
- ^ "LGG 427". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 29 August 2025.
External links
Media related to NGC 6782 at Wikimedia Commons- Hubble Heritage site: Pictures and description
