 A star at the location had earlier been catalogued as WOS 48, a possible S-type star, on the basis of strong LaO bands in its spectrum.On the basis of infrared photometry, IRAS 15194-5115 was given the variable star designation II Lupi in 1995, although the variability type was still unknown.More detailed infrared photometry confirmed that II Lupi was a Mira variable and showed regular variations with a period of 675 days over 18 years.