HD 206267

HD 206267 sits in the middle of the large emission nebula IC 1396 (also called the Elephant’s Trunk Nebula).  Spectroscopic studies have shown that this system consists of a binary with a 3.7 day orbital period  and a third component.  The spectral type of the system as a whole is O6.5V (see Wojdowski et al., 2002).  The maximum terminal velocity of the stellar wind from HD 206267 has been estimated to be ~3,225 km/s.

This very hot triple system is ionizing the surrounding emission nebula.  The intense radiation pressure and stellar winds from this object are thought to be compressing parts of the surrounding molecular cloud resulting in triggered star formation.  An image of HD 206267 (indicated by the green arrow) and the surrounding nebula is shown below.

ic1396_hd206267

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