claim: Foot Locker is a Canadian store chain.
evidence: Lambda Andromedae -LRB- λ And , λ Andromedae -RRB- is the Bayer designation for a binary star in the northern constellation of Andromeda .. Andromeda. Andromeda ( constellation ). Bayer designation. Bayer designation. binary star. binary star. constellation. constellation. At an estimated distance of approximately 86.1 ly from Earth , it has an apparent visual magnitude of +3.8 .. Earth. Earth. apparent visual magnitude. apparent visual magnitude. This is bright enough to be seen with the naked eye .. bright enough. Bortle Dark-Sky Scale. Lambda Andromedae is a single-lined spectroscopic binary with an orbital period of 20.5212 days .. spectroscopic binary. spectroscopic binary. The spectrum of the primary matches a stellar classification of G8 III-IV , suggesting that it is an evolved star that lies part way between the subgiant and giant stages .. spectrum. spectrum. stellar classification. stellar classification. evolved star. stellar evolution. subgiant. subgiant star. giant. giant star. The mass of this star is similar to the Sun , but it has expanded to around seven times the Sun 's radius .. It is radiating over 23 times the luminosity of the Sun from its outer envelope at an effective temperature of 4,800 K , giving it the characteristic yellow hue of a G-type star .. outer envelope. stellar atmosphere. effective temperature. effective temperature. This is an RS Canum Venaticorum variable and its brightness varies by 0.225 magnitudes , reaching a maximum of 3.70 , with a period of 54.2 days .. RS Canum Venaticorum variable. RS Canum Venaticorum variable. Such variability is theorized to occur because of tidal friction , which results in chromospheric activity .. chromospheric. chromosphere. activity. Stellar magnetic field. However , the orbit of this system is nearly circular , so the cause of this system 's variability remains uncertain .. The X-ray luminosity of this star , as measured by the ROSAT satellite , is .. ROSAT. ROSAT