Galactic Nebula NGC 6813

NGC 6813
NGC 6813: Galactic nebula in Vulpecula; 500 mm Cassegrain 3625 mm f/7.2; SBIG STL11K; 290+3*60 min LRGB; Bernese Highlands; © 2015 Radek Chromik [32]

History

The emission nebula NGC 6813 was discovered on 7 August 1864 by the German astronomer Albert Marth using William Lassell's 48 inch f/9.4 Newtonian telescope in Malta. [277, 396] He described the object as «two stars in very faint, small nebula». [313]

In 1946 the German astronomer Rudolph Minkowski published a list of emission nebulae which he discovered on photographic plates exposed by William C. Miller with the 10 inch telescope at Mount Wilson Observatory. There he classified NGC 6813 (also Min 1-93) as a diffuse one or strange nebula, noting that Heber D. Curtis observed a visually continuous spectrum in 1918, but the nebula showed fairly strong Hα emission. [397]

Physical Properties

On Simbad, NGC 6813 is classified as interstellar matter. No distance information can be found. [145] The designation IRAS 19383+2711 indicates an infrared source, which is due to a star cluster embedded in dense gas and dust from which only the far-infrared emission can be seen. [398] A strong source of microwave radiation in the 6.7 GHz line, a so-called methanol maser, was also found, indicating the formation of massive stars. [399] NGC 6813 is an ultra-compact H-II region in which stars are formed.

Revised+Historic NGC/IC Version 22/9, © 2022 Dr. Wolfgang Steinicke [277]
Designation NGC 6813
Type EN
Right Ascension (J2000.0) 19h 40m 24.0s
Declination (J2000.0) +27° 18' 34"
Diameter 3 × 3 arcmin
Metric Distance 1.500 kpc
Identification, Remarks GC 5944; SG 3.148

Finder Chart

The galactic nebula NGC 6813 is located in the constellation Vulpecula. The best observation time is March to December.

Finder Chart Galactic Nebula NGC 6813
Galactic Nebula NGC 6813 in constellation Vulpecula. Charts created using SkySafari 6 Pro and STScI Digitized Sky Survey. Limiting magnitudes: Constellation chart ~6.5 mag, DSS2 close-ups ~20 mag. [149, 160]

Objects Within a Radius of 15°

References

  • [32] Astrofotografie by Radek, Bernie and Dragan; sternwarte.ch
  • [145] SIMBAD astronomical database; simbad.u-strasbg.fr/simbad
  • [149] SkySafari 6 Pro, Simulation Curriculum; skysafariastronomy.com
  • [160] The STScI Digitized Sky Survey; archive.stsci.edu/cgi-bin/dss_form
  • [277] «Historische Deep-Sky Kataloge» von Dr. Wolfgang Steinicke; klima-luft.de/steinicke (2021-02-17)
  • [313] «A New General Catalogue of Nebulae and Clusters of Stars, being the Catalogue of the late Sir John F.W. Herschel, Bart., revised, corrected, and enlarged» Dreyer, J. L. E. (1888); Memoirs of the Royal Astronomical Society. 49: 1–237; Bibcode:1888MmRAS..49....1D
  • [396] «William Lassell's (1799-1880) telescopes and the discovery of Triton» Pedro Ré; astrosurf.com/re/william_lassell_telescopes.pdf (2021-06-25)
  • [397] «New Emission Nebulae» R. Minkowski; Publications of the Astronomical Society of the Pacific, Volume 58, Number 344, 1946; DOI:10.1086/125855
  • [398] «New infrared star clusters in the Northern and Equatorial Milky Way with 2MASS» E. Bica, C. M. Dutra, J. Soares and B. Barbuy; A&A Volume 404, Number 1, June II 2003; DOI:10.1051/0004-6361:20030486
  • [399] «New detections of 51-60 A+-methanol masers towards IRAS sources.» van der Walt, D. J. ; Gaylard, M. J. ; MacLeod, G. C.; Astronomy and Astrophysics Supplement, v.110, p.81; April 1995; Bibcode:1995&AS..110...81V