Galactic Nebula IC 4605

Object Description

IC 4605
IC 4605: Reflection nebula around star i Scorpii in Rho Ophiuchi Molecular Cloud. Crop from DSS [147]
Rho Ophiuchi Wolkenkomplex
Rho Ophiuchi Wolkenkomplex: In visible light (DSS) and Infrared (WISE) [147]

The reflection nebula IC 4605 (LBN 1110) belongs together with IC 4603, IC 4604, the Antares nebula vdB 107, Sharpless 2-9 and many dark clouds to a large area of nebula, the Ophiuchus Molecular Cloud. Its center is about one degree south of the star ρ Ophiuchi, is surrounded by dense dust and is only visible in infrared images. The IC numbers were discovered in 1882 by the American astronomer Edward Barnard, who also recorded the dark clouds B 42, B 44 and B 45. [196, 239, 270, 277]

The Ophiuchus Molecular Cloud, also called Rho Ophiuchus Cloud, is an area with active star formation, which is one of the closest to us at a distance of only about 407 light years. X-ray and infrared observations revealed more than 300 young stars within the large cloud in the center. The age of these stars is estimated to be only 300'000 years - very young compared to the oldest stars in the universe, which are more than twelve billion years old. [460]

«Revised New General Catalogue and Index Catalogue» Dr. Wolfgang Steinicke, 2021 [277]
DesignationIC 4605
TypeRN+*
Right Ascension16h 30m 12.5s
Declination-25° 06' 53"
Diameter30.00 × 30.0 arcmin
Dreyer Description* 7 in eF, vL neb
IdentificationLBN 1110, ESO 517-*N8, CED 133
Ophiuchus Molecular Cloud
Ophiuchus Molecular Cloud: Open cluster Collinder 302 with Ophiuchus molecular cloud (Antares Nebula vdB 107, nebula IC 4603, ρ Ophiuchi nebula IC 4604, nebula IC 4605, Sharpless 2-9, many dark clouds), plus globular clusters M 4 und NGC 6144. North is left; Canon EOS 20Da, Zoom-Objektiv 131 mm f:5.6 ; 145 min @ ISO 1600; Astrofarm Tivoli, Namibia, 1345 m elevation; © 5. 6. 2011 Eduard von Bergen, Hansjörg Wälchli

Finder Chart

The nebula IC 4605 is located in the constellation Scorpius (Scorpio) at the 4.8 mag bright star i Scorpii, about 1.4 degrees north of the bright star Antares (α Scorpii). The best observation time is April to August.

Chart IC 4605
Chart created using SkySafari 6 Pro and STScI Digitized Sky Survey. [149, 160]

References

147Aladin Lite; aladin.u-strasbg.fr/AladinLite (2020-12-23)
149SkySafari 6 Pro, Simulation Curriculum; skysafariastronomy.com
160The STScI Digitized Sky Survey; archive.stsci.edu/cgi-bin/dss_form
196Celestial Atlas by Curtney Seligman; cseligman.com/text/atlas.htm (2020-12-28)
239«On the dark markings of the sky, with a catalogue of 182 such objects» Barnard, E. E.; Astrophysical Journal, 49, 1-24 (1919); DOI:10.1086/142439; Bibcode:1919ApJ....49....1B
270«Catalogue of Bright Nebulae» Lynds, Beverly T.; Astrophysical Journal Supplement, vol. 12, p.163 (1965); DOI:10.1086/190123
277«Historische Deep-Sky Kataloge» von Dr. Wolfgang Steinicke; klima-luft.de/steinicke (2021-02-17)
460Young Stars in Their Baby Blanket of Dust; nasa.gov/mission_pages/spitzer/multimedia/20080211.html (2021-12-30)