IC 1795 - March 2012



About the image…

Image title –IC 1795.
Taken at – Observatorio del Teide (Canary Islands – Spain; 16º 30' 35" W, 28º 18' 00" N).
Telescope – IAC80 (82cm diameter).
Instrument– CCD E2V 42-40.
Focal Ratio – Cassegrain f/11.3.
Exposure – Halpha: 2x1200s (x6), B: 2x60s (x6), V: 2x230s (x6), R: 3x120s (x6).
Image size – 2x3 mosaic, 3,575 x 5,144 pixels (18.1 x 26.1 arcmin).
Software – IRAF, PixInsight, Photoshop CS5.
Images taken and reduced by –
Pablo Rodríguez-Gil and Pablo Bonet.
Text – Pablo Rodríguez-Gil.

IC 1795 is a vast HII region of gas and obscuring dust clouds where new stars are being produced. The OB association of young stars inside IC 1795 ionises the diffuse HII region in the W3 giant molecular cloud complex. This region is located in the Perseus arm of the Galaxy, and contains several spectacular areas of high- and low-mass star formation: W3-North, W3-Main and W3-OH (Roccatagliata et al. 2011). IC 1795 is located right at the tip of the heart in the famous Heart Nebula (IC 1805). Also known as NGC 896, this star factory can be found in the constellation Cassiopeia. The OB association is believed to lie at the same distance as W3-OH. From maser kinematics this has accurately been measured to be 2.0 kpc (Xu et al. 2006; Hachisuka et al. 2006). This month's AIM was obtained with the 0.82-m IAC80 telescope, and is actually a HαBVR mosaic of 2x3 images.