NGC 6744

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Galaxy
NGC 6744
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Image taken with the Wide Field Imager at the MPG / ESO 2.2 meter telescope in the La Silla Observatory
Image taken with the Wide Field Imager at the MPG / ESO 2.2 meter telescope in the La Silla Observatory
AladinLite
Constellation peacock
Position
equinox :  J2000.0 , epoch : J2000.0
Right ascension 19 h 09 m 46.1 s
declination -63 ° 51 ′ 27 ″
Appearance
Morphological type SAB (r) bc / LINER  
Brightness  (visual) 8.3 mag
Brightness  (B-band) 9.1 mag
Angular expansion 20.1 ′ × 12.9 ′
Position angle 15 °
Surface brightness 14.2 mag / arcmin²
Physical data
Affiliation NGC-6744 Group,
Virgo Supercluster  
Redshift 0.002805 ± 0.000007  
Radial velocity (841 ± 2) km / s  
Stroke distance
v rad  / H 0 		(33 ± 2)  x  10 6  ly
(10.2 ± 0.7)  Mpc 
history
discovery James Dunlop
Discovery date June 30, 1826
Catalog names
NGC  6744 • PGC  62836 • ESO  104-42 • IRAS  19050-6354 • 2MASX  J19094609-6351271 • SGC  190501-6356.2 • GC  4464 • h  3776 • AM 1905-635 • Dun  262 • HIPASS  J1909-63a • LDCE 1321 NED003

NGC 6744 is a barred spiral galaxy of the Hubble type SBbc in the constellation Peacock . NGC 6744 has a magnitude of 8.3 mag and an angular extent of 20.1 × 12.9 arc minutes . This makes it one of the apparently brightest and largest galaxies in our night sky. It is about 33 million light years away from the Milky Way and has a diameter of almost 150,000 light years. The galaxy has a distinct spiral structure , and in its center there is a weakly defined bar . This consists mainly of old stars that glow yellowish.

Red spots can be seen in the spiral arms - clouds of gas and dust in which there are young, massive stars that emit an intense ultraviolet light. This radiation stimulates the gas in the vicinity of the stars to glow. In the optical spectral it reveals itself primarily by for hydrogen typical reddish light of the H-alpha - spectral line .

NGC 6744 has an irregular companion galaxy called NGC 6744A (in the picture the small spot on the bottom right).

James Dunlop discovered NGC 6744 on June 30, 1826.

Recordings

  • Ultraviolet image of the galaxy using GALEX

  • High-resolution image of the central area of ​​the galaxy from the Hubble Space Telescope

Web links

Commons : NGC 6744  - collection of images, videos, and audio files

Individual evidence

  1. ↑ a b c d NASA / IPAC EXTRAGALACTIC DATABASE
  2. ↑ a b c d e SEDS: NGC 6744
  3. ↑ http://www.eso.org/public/germany/news/eso1118/
  4. ↑ NGC 6744 - a twin of our Milky Way galaxy? ; in: Stars and Space , August 2011, p. 16
  5. ↑ Seligman