Young Blue Stars of Nebula IC 4605 in Scorpius | Schulman Telescope

Young Blue Stars of Nebula IC 4605 in Scorpius | Schulman Telescope

This view of the reflection nebula IC 4605 and of young blue stars was acquired by the Schulman Telescope at the University of Arizona's Mount Lemmon SkyCenter. The large blue star in the foreground is called 22 Scorpii. It is a B-type main-sequence star with a stellar classification of B3 V. It is ten million years old and has a high rate of spin with a projected rotational velocity of 169 km/s. The star has about six times the mass of the Sun and is radiating 335 times the Sun's luminosity from its photosphere at an effective temperature of 19,600 Kelvin. This star is embedded in, or adjacent to, the diffuse nebulous cloud IC 4605 located in the western regions of the Rho Ophiuchi cloud complex.

Distance: ~400 light years

Image Details:

Optics: Schulman 32-inch RCOS Telescope

Camera: SBIG STX16803

The 0.81 m (32 in) Schulman Telescope is a Ritchey-Chrétien reflector built by RC Optical Systems and installed in 2010. It is operated by the Mount Lemmon SkyCenter and is Arizona's largest dedicated public observatory. The Schulman Telescope was designed from inception for remote control over the Internet by amateur and professional astrophotographers worldwide. It is currently the world's largest telescope dedicated for this purpose.

Image Credit & Copyright: Adam Block/Mount Lemmon SkyCenter/University of Arizona

Caption Acknowledgements: UA/Wikipedia

Image Date: May 1, 2015

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