Astronomy:NGC 3195

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Short description: Planetary nebula in the constellation Chamaeleon
NGC 3195
Emission nebula
Planetary nebula
Caldwell 109.jpg
A Hubble Space Telescope (HST) image of NGC 3195.
Credit: HST/NASA/ESA.
Observation data: J2000 epoch
Right ascension 10h 09m 20.910s[1]
Declination−80° 51′ 30.73″[1]
Distance6,440 ly (1,975 pc)[2] ly
Apparent magnitude (V)11.6[3]
Apparent dimensions (V)1.33′[2]
ConstellationChamaeleon
DesignationsCaldwell 109, Hen 2-44, Sa2-57, PK 296-20.1, PN G296.6-20.0, ESO 19-2[4]
See also: Lists of nebulae

NGC 3195 (also known as Caldwell 109) is a planetary nebula located in the southern constellation of Chamaeleon. Discovered by Sir John Herschel in 1835,[3] this 11.6 apparent magnitude[3] planetary nebula is slightly oval in shape, with dimensions of 40×35 arc seconds, and can be seen visually in telescopic apertures of 10.5 centimetres (4.1 in) at low magnifications.[5]

Spectroscopy reveals that NGC 3195 is approaching Earth at 17 kilometres per second (11 mi/s), while the nebulosity is expanding at around 40 kilometres per second (25 mi/s). The central star is listed as >15.3V or 16.1B magnitude. An analysis of Gaia data suggests that the central star is a binary system.[6] Distance is estimated at about 1.7 kpc.

References

  1. ↑ 1.0 1.1 Kerber, F. et al. (September 2003). "Galactic Planetary Nebulae and their central stars. I. An accurate and homogeneous set of coordinates". Astronomy and Astrophysics 408 (3): 1029–1035. doi:10.1051/0004-6361:20031046. Bibcode: 2003A&A...408.1029K. 
  2. ↑ 2.0 2.1 Stanghellini, L. et al. (2008). "The Magellanic Cloud Calibration of the Galactic Planetary Nebula Distance Scale". The Astrophysical Journal 689 (1): 194–202. doi:10.1086/592395. Bibcode: 2008ApJ...689..194S. 
  3. ↑ 3.0 3.1 3.2 Seligman, Courtney. "New General Catalogue objects: NGC 3150 - 3199". https://cseligman.com/text/atlas/ngc31a.htm#3195. 
  4. ↑ "NGC 3195". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+3195. 
  5. ↑ O'Meara, Stephen James (2014), Deep-Sky Companions: The Messier Objects, Deep-sky companions, Cambridge University Press, p. 499, ISBN 978-1107018372, https://books.google.com/books?id=MMfxDAAAQBAJ&pg=PA499 
  6. ↑ Chornay, N.; Walton, N. A.; Jones, D.; Boffin, H. M. J.; Rejkuba, M.; Wesson, R. (2021). "Towards a more complete sample of binary central stars of planetary nebulae with Gaia". Astronomy & Astrophysics 648: A95. doi:10.1051/0004-6361/202140288. Bibcode: 2021A&A...648A..95C. 

External links



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