Astronomy:NGC 6384

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NGC 6384
NGC 6384 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationOphiuchus
Right ascension 17h 32m 24.302s[1]
Declination+07° 03′ 36.97″[1]
Redshift0.005554[2]
Helio radial velocity1,665 km/s[3]
Distance76.6 Mly (23.5 Mpc)[3]
Characteristics
TypeSAB(r)bc[4]
Mass1.05 × 1011[4] M☉
Size138,000 light years
Other designations
IRAS 17299+0705, UGC 10891, MCG+01-45-001, PGC 60459

NGC 6384 is an intermediate barred spiral galaxy located about 77 million light-years away in the northern part of the constellation Ophiuchus. It was discovered on 10 June 1863 by German-British astronomer Albert Marth.[5]

NGC 6384 has a morphological classification of SAB(r)bc,[4] indicating that it is a weakly barred galaxy (SAB) with an inner ring structure (r) orbiting the bar, and moderate to loosely wound spiral arms (bc).[6] The galaxy is inclined by an angle of 47° to the line of sight, along a position angle of 40°.[7] The estimated mass of the stars in this galaxy is 105 billion times the mass of the Sun.[4]

At one time NGC 6384 was considered a normal galaxy with no activity in the nucleus. However, it is now classified as a transition object (T2), which is thought to be a LINER-type galaxy whose emission-line spectra is contaminated by H II regions in the nucleus.[8]

Supernovae

Three supernovae have been observed in NGC 6384:

  • SN 1971L (Type Ia, mag. 13) was discovered by W. Logan on 24 June 1971, located 27″ east and 20″ north of the nucleus.[9][10] It reached a peak visual magnitude of 12.85 around the end of June.[11] It was situated along a spiral arm, suggesting that the progenitor was not a member of the older, more evolved stellar population of the galaxy.[7]
  • SN 2017drh (Type Ia, mag. 17.9356) was discovered by the Distance Less Than 40 Mpc Survey (DLT40) on 3 May 2017.[12]
  • SN 2024pxl (Type Iax[02cx-like], mag. 17.668) was discovered by the Zwicky Transient Facility on 23 July 2024.[13]

References

  1. ↑ 1.0 1.1 Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W. et al. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal 131 (2): 1163–1183. doi:10.1086/498708. ISSN 0004-6256. Bibcode: 2006AJ....131.1163S. 
  2. ↑ "NASA/IPAC Extragalactic Database". Results for NGC 6384. http://ned.ipac.caltech.edu/byname?objname=NGC+6384. 
  3. ↑ 3.0 3.1 Cappellari, Michele et al. (May 2011), "The ATLAS3D project - I. A volume-limited sample of 260 nearby early-type galaxies: science goals and selection criteria", Monthly Notices of the Royal Astronomical Society 413 (2): 813–836, doi:10.1111/j.1365-2966.2010.18174.x, Bibcode: 2011MNRAS.413..813C. 
  4. ↑ 4.0 4.1 4.2 4.3 Weinzirl, Tim et al. (May 2009), "Bulge n and B/T in High-Mass Galaxies: Constraints on the Origin of Bulges in Hierarchical Models", The Astrophysical Journal 696 (1): 411–447, doi:10.1088/0004-637X/696/1/411, Bibcode: 2009ApJ...696..411W. 
  5. ↑ Seligman, Courtney. "NGC 6384". https://cseligman.com/text/atlas/ngc63a.htm#6384. 
  6. ↑ Buta, Ronald J. et al. (2007), Atlas of Galaxies, Cambridge University Press, pp. 13–17, ISBN 978-0521820486, https://books.google.com/books?id=g-P7dCbB5MEC&pg=PA16. 
  7. ↑ 7.0 7.1 Hakobyan, A. A. et al. (October 2007), "Study of the HII regions in the spiral galaxy NGC6384", Astrophysics 50 (4): 426–439, doi:10.1007/s10511-007-0040-8, Bibcode: 2007Ap.....50..426H. 
  8. ↑ Sánchez-Portal, Miguel; Díaz, Ángeles I. (May 2004), "Structural parameters of nearby emission-line galaxies", Monthly Notices of the Royal Astronomical Society 350 (3): 1087–1106, doi:10.1111/j.1365-2966.2004.07720.x, Bibcode: 2004MNRAS.350.1087S. 
  9. ↑ Marsden, Brian G. (25 June 1971). "Circular No. 2336". Smithsonian Astrophysical Observatory, IAU. http://www.cbat.eps.harvard.edu/IAUCs/IAUC2336.jpg. 
  10. ↑ "SN 1971L". IAU. https://www.wis-tns.org/object/1971L. 
  11. ↑ Barbon, R. et al. (1973), "Observations of five supernovae 1970-71", Memorie della Società Astronomia Italiana 44: 65–85, Bibcode: 1973MmSAI..44...65B. 
  12. ↑ "SN 2017drh". IAU. https://www.wis-tns.org/object/2017drh. 
  13. ↑ "SN 2024pxl". IAU. https://www.wis-tns.org/object/2024pxl. 

Coordinates: Sky map 17h 32m 24.302s, +07° 03′ 36.97″



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