Very strange star photographed in night over Las Vegas

On December 26, 2014, at 8 PM, an American family was in Las Vegas (Nevada) when they were sighting an unusual star in sky. This UFO was larger and brighter than a star. So, what is it?

Witness statement:

My husband, daughter and I were outside on the back patio star gazing toward the eastern sky. We noticed what looked like a very bright star or planet on the Eastern horizon. It was stationary and did not move. It was much larger, extremely larger than any other star. The bright pulsating light seemed to change shape as we watched it. First looked kind of star shaped and pulsating light, than looked like cigar shaped pulsating light, etc. We viewed it for about 30 minutes.