Planetary Nebula IC 5117

IC 5117
IC 5117: Planetary nebula in Cygnus; 500 mm Cassegrain f=5800 mm f/11.4; SBIG STL11K; 50+50+50+50 min LRGB; Bernese Highlands; © 2005 Radek Chromik [32]

History

The planetary nebula IC 5117 was discovered in 1905 by the Scottish-American astronomer Williamina Fleming. Dreyer described the nebula in his 1910 second index catalog as «planetary, stellar». [196, 315]

Physical Properties

In fact, with an angular extent of only 1.2 arcseconds, the PN can hardly be distinguished from a star. The apparent brightness measured in different filters: V 16.7 mag, J 11.3 mag, H 10.7 mag, K 9.5 mag.

IC 5117 is a very young and compact planetary nebula. The gas surrounding the central star is still very dense with 90'000 molecules per cubic centimeter and very hot with a temperature of 12'000 Kelvin. The central star is estimated to have a temperature of 120'000 Kelvin. The distance is estimated to be 3 kpc (about 9700 light years). Exact measurements are not available. [337]

«Strasbourg-ESO Catalogue of Galactic Planetary Nebulae» Acker et al., 1992 [141]
DesignationsPN G089.8-05.1: IC 5117, PK 89-05.1, ARO 112, VV 266, VV' 552
Right Ascension (J2000.0)21h 32m 31s
Declination (J2000.0)+44° 35' 48"
Dimensions 1.2" (optical), 1.5" (radio)
Distance 2.5 kpc
Radial Velocity-26.1 ± 1.3 km/s
Expansion Velocity 16.5 (O-III) 21.5 (N-II) km/s
C-Star DesignationsAG82 431, CSI +44-21305 0, EM* CDS 1256, HD 205211
C-Star MagnitudeB: 17.5, V: 16.7
C-Star Spectral TypeWR
DiscovererFLEMING 1905

Finder Chart

The planetary nebula IC 5117 is located in the constellation Cygnus. The best observation time is January to December

Cygnus: Planetary Nebula IC 5117
Finder Chart Planetary Nebula IC 5117
19:59
06:06 | 87.9°
16:13
Charts created using SkySafari 6 Pro and STScI Digitized Sky Survey. Limiting magnitudes: Constellation chart ~6.5 mag, DSS2 close-ups ~20 mag. Times are shown for timezone UTC, Latitude 46.7996°, Longitude 8.23225°, Horizon height 5°, Date 2025-05-05. [149, 160]

Objects Within a Radius of 10°

Egg Nebula
CRL 2688
Humason 1-2
IC 1369
Pelican Nebula
IC 5070
IC 5076
Cocoon Nebula
IC 5146
Messier 39
Minkowski 1-79
Mexico Nebula
NGC 7000
Cheeseburger Nebula
NGC 7026
NGC 7027
NGC 7048
NGC 7243
Moth Nebula
Sh 1-89
V 1331 Cygni

References

  • [32] Astrofotografie; Radek, Bernie and Dragan; sternwarte.ch
  • [141] Strasbourg-ESO Catalogue of Galactic Planetary Nebulae; A. Acker, F. Ochsenbein, B. Stenholm, R. Tylenda, J. Marcout, C. Schohn; European Southern Observatory; ISBN 3-923524-41-2 (1992); Bibcode:1992secg.book.....A; cdsarc.unistra.fr/viz-bin/cat/V/84
  • [149] SkySafari 6 Pro, Simulation Curriculum; skysafariastronomy.com
  • [160] The STScI Digitized Sky Survey; archive.stsci.edu/cgi-bin/dss_form
  • [196] Celestial Atlas; Curtney Seligman; cseligman.com/text/atlas.htm; 2020-12-28
  • [315] Second Index Catalogue of Nebulae and Clusters of Stars; containing objects found in the years 1895 to 1907, with Notes and Corrections to the New General Catalogue and to the Index Catalogue for 1888–94; Dreyer, J. L. E.; Memoirs of the Royal Astronomical Society. 59: 105–198 (1910); Bibcode:1910MmRAS..59..105D
  • [337] Optical Spectrum of the Compact Planetary Nebula IC 5117; Siek Hyung, Lawrence H. Aller, Walter A. Feibelman, and Seong-Jae Lee; The Astrophysical Journal, Volume 563, Number 2, 2001; DOI:10.1086/323962