North America Nebula (NGC 7000) & Pelican Nebula (IC 5070)

NGC 7000 + IC 5070
NGC 7000 + IC 5070: Northamerica and Pelican Nebula in Cygnus; Refraktor Pentax 75 SDHF at f/4.8 (Reducer); Canon EOS 20Da; 10 Micron GM 2000 QCI Ultraportable; 42x5 min @ 800 ASA; Gurnigelpass, 1600 m AMSL; © 29. 8. 2008 Manuel Jung [45]
NGC 7000
NGC 7000: Northamerica and Pelican Nebula; Celestron RASA 11" f/2.22; ZWO ASI6200 Pro; Tentlingen; © 2020 Peter Kocher [33]

History

On 24 October 1786 the German-British astronomer William Herschel discovered an open star cluster which he cataloged as VIII 58 (class VIII = coarsely scattered clusters of stars) which he described as «cluster of pretty large scattered stars, not very rich». In the same night he discovered a very large nebula which he cataloged as V 37 and noted: «very large diffused nebulosity, brighter in the middle, 7 or 8' long, 6' broad and losing itself very gradually and imperceptibly.» [464] Later the star cluster VIII 58 got the designation GC 4620 in John Herschels «General Catalogue» and NGC 6997 in John Dreyers «New General Catalogue». The nebula became known as NGC 7000. [313, 467] The name «North America Nebula» can be traced back to the German astronomer Dr. Max Wolf (1863-1932) because the outlines of the luminous H-II region with the dark cloud reminded him of it. [4]

42 years later, on 28 October 1828 William Herschel son John discovered another «poor , little compressed cluster» which he cataloged first as h 2094 and then as GC 4617. That cluster received the designation NGC 6996 in John Dreyers «New General Catalogue». [313, 467]

Max Wolf took a picture of this region on 1 June 1891 and discovered further nebulae that were added as IC 5067 and IC 5070. On 7 September 1899 the British astronomer Thomas Espin reported another patch of this giant emission nebula which later got the designation IC 5067. [277]

NGC 7000
NGC 7000: Detail section of NGC 7000 (North America Nebula); 500 mm Cassegrain 3625 mm f/7.2; SBIG STL11K; 120+45+45+45 min LRGB; Bernese Highlands; © 2011 Radek Chromik [32]
IC 5070
IC 5070: Detail section of IC 5070 (Pelican Nebula); 500 mm Cassegrain 3625 mm f/7.2; SBIG STL11K; 150+40+40+40 min LRGB; Bernese Highlands; © 2011 Radek Chromik [32]
IC 5070
IC 5070: Pelican Nebula; Celestron RASA 11" f/2.22; ZWO ASI6200 Pro; Tentlingen; © 2020 Peter Kocher [33]

Physical Properties

NGC 7000 is a large cloud composed of glowing gas and dark dust. The western portion, which appears separated by a dark cloud, has the designation IC 5070 and is nicknamed the «Pelican Nebula» because it somewhat resembles a seated pelican, holding its long beak to its chest and looking east toward the North America Nebula. About 1.5° south of it there is another glowing nebula, which has been given the designation IC 5068.

The star Deneb (α Cygni) is traditionally considered the main source making the H-II region glow, but it is also likely that several stars in this region are doing their part. The open star cluster NGC 6997 appears in the middle of the nebula, but whether it's at the same distance is uncertain. The distance to the nebula is estimated at about 1600 light-years, which roughly corresponds to the calculated distance of the star Deneb. The star's true distance from the nebula cannot be much less than 70 light-years. The nebula itself is about 45 light-years across. [4]

Revised+Historic NGC/IC Version 22/9, © 2022 Dr. Wolfgang Steinicke [277]
Name RA Dec Type bMag vMag B-V SB Dim PA z D(z) MD Dreyer Description Identification, Remarks
NGC 6996 20 56 30.0 +45 28 24 OCL (III2p) 10.0 5 1.500 Cl, P, lC OCL 197, in Milky Way
NGC 6997 20 56 30.0 +44 39 00 OCL (III2p) 10.0 8 0.620 Cl, P, lC, st L OCL 197
NGC 7000 20 59 18.0 +44 31 00 EN 4.0 5.0 120 × 100 0.795 F, eeL, dif nebulosity LBN 373, North America nebula
IC 5067 20 47 50.0 +44 22 00 EN 8.0 25 × 10 0.600 F LBN 353, CED 183A, Pelican nebula
IC 5068 20 50 30.0 +42 28 42 EN 40 × 30 0.600 vF LBN 328, CED 183B
IC 5070 20 51 00.0 +44 24 06 EN 8.0 60 × 50 0.600 F, dif LBN 350, CED 183C, Pelican nebula

Finder Chart

The North America Nebula lies only about 3° west of the bright star Deneb (α Cygni) in the constellation Cygnus. In the months of April to November it is highest in the sky at night and can be best observed.

Finder Chart North America Nebula (NGC 7000) & Pelican Nebula (IC 5070)
North America Nebula (NGC 7000) & Pelican Nebula (IC 5070) in constellation Cygnus. 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]
NGC 7000
NGC 7000: NGC/IC designations in North America and Pelican Nebula. Top right Deneb (α Cygni). Section off DSS2 [147]

Visual Observation

300 mm Aperture: With the Tele Vue 21 mm Ethos eyepiece, you can achieve a field of view of 1.75° at just 1.2 meters focal length, allowing you to overlook the entire Caribbean dark cloud with Florida and Mexico. Using an O-III filter, the contrast becomes even more pronounced. It's worth wandering along the nebula with the telescope and enjoying this star-rich region of the Milky Way. This is one of my favorite objects with the short Newtonian telescope. — 300 mm f/4 Popp-Newton, Bernd Nies

More Objects Nearby (±15°)

References

  • [4] «Burnham's Celestial Handbook: An Observer's Guide to the Universe Beyond the Solar System» by Robert Burnham; Dover Publications, Inc.; Voume I: ISBN 0-486-23567-X; Volume II: ISBN 0-486-23568-8; Volume III: ISBN 0-486-23673-0; archive.org/details/burnhams-celestial-handbook-3
  • [32] Astrofotografie by Radek, Bernie and Dragan; sternwarte.ch
  • [33] Sternwarte Tentlingen MPC A16, Peter Kocher; astropeter.ch
  • [45] Astro-, Landschafts- und Reisefotografie sowie Teleskopbau, Manuel Jung; sternklar.ch
  • [147] Aladin Lite; aladin.unistra.fr/AladinLite
  • [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
  • [464] «Catalogue of a second thousand of new nebulae and clusters of stars; with a few introductory remarks on the construction of the heavens» William Herschel, Philosophical Transactions of the Royal Society of London, 1 January 1789; DOI:10.1098/rstl.1789.0021
  • [467] «Catalogue of nebulae and clusters of stars» John Frederick William Herschel, Philosophical Transactions of the Royal Society of London, 1 January 1864; DOI:10.1098/rstl.1864.0001