AAVSO Alert Notice 427: Observing Campaign on BM Ori and the Trapezium RegionAAVSO Alert Notice 427: Observing Campaign on BM Ori and the Trapezium Region
AAVSO Alert Notice 427<br /> Observing campaign on BM Ori and the Trapezium region<br /> November 23, 2010<br /> <p></p> <p>The AAVSO requests ground-based observations of the Trapezium region of the Orion Nebula (M42),