AAVSO Alert Notice 422: Observing Campaign on Hubble’s First Variable in M31: M31_V1AAVSO Alert Notice 422: Observing Campaign on Hubble’s First Variable in M31: M31_V1
AAVSO Alert Notice 422:<br /> Observing Campaign on Hubble’s First Variable in M31: M31_V1<br /> July 16, 2010 <p>An observing campaign is being carried out on M31_V1, the first variable star discovered in