M 57

M57—The Ring Nebula

M57—The Ring Nebula (NGC 6720)

Image Data

Telescope: 10″ Aries f/15 Maksutov-Cassegrain on Astro-Physics 900GTO German Equatorial
Accessories: Moravian G1-0300 as Off-Axis Guider, 0.67X Astro-Physics CCD Telecompressor
Resolution: 0.42″/pixel
Instrument: SBIG ST-4000XCM
Exposures: 30×2 min RGB
Filter(s): IDAS LPS
Exposure Date: 29 June 2010
Seeing, FWHM: 1.6″
Processing Software: MaximDL, PixInsight, Photoshop
Image Acquisition Software: MaximDL, TheSky6, CCDAutoPilot, FocusMax, PinPoint

Object Data

Constellation: Lyra
Type: Planetary Nebula

Processing Procedure

This image uses R channel as Luminosity (RRGB), post-processed using HDR Wavelet Transforms in PixInsight. No color calibration has been done. Calibration only with dark and bias frames.



1978ApJ...219L..33B Detection of molecular hydrogen emission from five planetary nebulae Beckwith, S.; Gatley, I.; Persson, S. E.; Astrophysical Journal, Part 2 - Letters to the Editor, vol. 219, Jan. 1, 1978, p. L33-L35, L37, L38. Jan 1978
1970ApJ...161..917A The Spectra of Thirty-Three Gaseous Nebulae in the Yellow-Green Region Obtained with an Electronic Camera. Aller, Lawrence H.; Walker, Merle F.; Astrophysical Journal, vol. 161, p.917 Sep 1970
1997A&A...324.1123B The chemical evolution of planetary nebulae. Bachiller, R.; Forveille, T.; Huggins, P. J.; Cox, P.; Astronomy and Astrophysics, v.324, p.1123-1134 Aug 1997
1983ApJ...267..630B The ionization structure of planetary nebulae. III - NGC 7009 Barker, T.; Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 267, April 15, 1983, p. 630-637. Apr 1983
2002AJ....123.3329O Knots in Nearby Planetary Nebulae O'Dell, C. R.; Balick, B.; Hajian, A. R.; Henney, W. J.; Burkert, A.; The Astronomical Journal, Volume 123, Issue 6, pp. 3329-3347. Jun 2002
1978ApJ...222..384G Electron collisional excitation cross sections for Fe III and Fe VI and iron abundances in gaseous nebulae Garstang, R. H.; Robb, W. D.; Rountree, S. P.; Astrophysical Journal, Part 1, vol. 222, May 15, 1978, p. 384-397. May 1978
1997ApJ...477..218G 3He in Planetary Nebulae: A Challenge to Stellar Evolution Models Galli, Daniele; Stanghellini, Letizia; Tosi, Monica; Palla, Francesco; The Astrophysical Journal, Volume 477, Issue 1, pp. 218-225. Mar 1997
1960ApJ...131..537M Electron Densities in Two Planetary Nebulae. Minkowski, R.; Osterbrock, D.; Astrophysical Journal, vol. 131, p.537 May 1960
1994ApJ...421..600K The bipolar symmetry of ring-like planetary nebulae: Molecular hydrogen emission from halos Kastner, Joel H.; Gatley, Ian; Merrill, K. M.; Probst, R.; Weintraub, David; Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 421, no. 2, p. 600-604 Feb 1994
1960ApJ...131..541O Electron Densities in Planetary Nebulae. Osterbrock, Donald E.; Astrophysical Journal, vol. 131, p.541 May 1960

Other 114 records retrieved but not showed.

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