Galactic Nebula IC 4605

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

Object Description

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+Historic NGC/IC Version 22/9, © 2022 Dr. Wolfgang Steinicke [277]
Designation IC 4605
Type RN+*
Right Ascension (J2000.0) 16h 30m 12.5s
Declination (J2000.0) -25° 06' 53"
Diameter 30 × 30 arcmin
Metric Distance 0.120 kpc
Dreyer Description * 7 in eF, vL neb
Identification, Remarks LBN 1110; ESO 517-*N8; CED 133
Ophiuchus Molecular Cloud
Ophiuchus Molecular Cloud: Star forming region with 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 and NGC 6144. North is left; Canon EOS 20Da, zoom lens 131 mm f:5.6 ; 145 min @ ISO 1600; Astrofarm Tivoli, Namibia, 1345 m ü. M.; © 5. 6. 2011 Eduard von Bergen, Hansjörg Wälchli [29]

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.

Finder Chart Galactic Nebula IC 4605
Galactic Nebula IC 4605 in constellation Scorpius. 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