NGC 1365

NGC 1365, also known as the Great Barred Spiral Galaxy,[3] is a barred spiral galaxy about 56 million light-years away in the constellation Fornax. The core is an oval shape with an apparent size of about 50″ × 40″.[4] The spiral arms extend in a wide curve north and south from the ends of the east-west bar and form an almost ring like Z-shaped halo.[4] The central mass in an active galactic nucleus rotates close to relativistic limit (the dimensionless spin parameter is larger than 0.84).[5]

Supernovae 2012fr, 2001du, 1983V, and 1957C were observed in NGC 1365.

In February 2013, observations using the NuSTAR satellite have found that the central supermassive black hole of NGC 1365, measured to be about 2 million solar masses in mass, is spinning at almost the speed of light.[6]

NGC 1365

NGC 1365's central region showing dust lanes.

This video sequence shows the rapid brightening and slower fading of a supernova explosion in the galaxy.


An ultraviolet image of NGC 1365 taken with GALEX. Credit: GALEX/NASA.

NGC 1365 ESO

HAWK-I infrared image of NGC 1365. Credit: ESO/P. Grosbøl.

NGC 1365
Credit: ESO
Observation data (J2000 epoch)
Right ascension03h 33m 36.4s[1]
Declination−36° 08′ 25″[1]
Redshift1636 ± 1 km/s[1]
Distance56.2 ± 2.6 Mly (17.2 ± 0.8 Mpc)[2]
Apparent magnitude (V)10.3[1]
Apparent size (V)11′.2 × 6′.2[1]
Other designations
PGC 13179[1]

See also


  1. ^ a b c d e f g "NASA/IPAC Extragalactic Database". Results for NGC 1365. Retrieved 2006-11-21.
  2. ^ Jensen, Joseph B.; Tonry, John L.; Barris, Brian J.; Thompson, Rodger I.; et al. (February 2003). "Measuring Distances and Probing the Unresolved Stellar Populations of Galaxies Using Infrared Surface Brightness Fluctuations". Astrophysical Journal. 583 (2): 712–726. arXiv:astro-ph/0210129. Bibcode:2003ApJ...583..712J. doi:10.1086/345430.
  3. ^ Garlick, Mark A. (2004). Astronomy: A Visual Guide. Firefly Books. p. 293. ISBN 978-1-55297-958-7.
  4. ^ a b Kepple, George Robert; Glen W. Sanner (1998). The Night Sky Observer's Guide. 1. Willmann-Bell, Inc. p. 198. ISBN 0-943396-58-1.
  5. ^ - Unambiguous Determination of the Spin of the Black Hole in NGC 1365
  6. ^ Reynolds, Christopher (2013). "Astrophysics: Black holes in a spin". Nature. 494: 432–433. Bibcode:2013Natur.494..432R. doi:10.1038/494432a. PMID 23446411.

External links

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