If this picture attachment posts properly, you will see a symbol on the bottom left hand corner that looks like a circle with an upside-down cross. This is picture of the sky, from the viewpoint of L.A. looking southeast on February 21, 2011 at 4:18 AM WST, which is 12:18 UTC. That symbol on the ESE horizon is the planet Venus, the third brightest object in the sky after the Sun and Moon. You likely would have first seen it shortly after it rose above the mountains, which according to your description was around 4:30 AM. Your observation was great by the way. One of God’s Creations, Venus is spectacular in the Morning as well as the Evening, just at different times in its cycle. The Greek called it Eosphoros when it was visible in the East and Whesphoros when it was visible in the West, hence the origin of our words east and west. Some time before just Jesus came, the Greek figured out their morning and evening star were the same celestial object. I think Daniel and his Babylonian stargazers knew it hundreds of years earlier. Eventually, the Greek renamed it Phosphoros. It is the same Greek word used in this passage in II Peter as ‘day star’, symbolic of Jesus arising in your heart:
" We have also a more sure word of prophecy; whereunto ye do well that ye take heed, as unto a light that shineth in a dark place, until the day dawn, and the day star arise in your hearts:" - 2Pe 1:19 KJV
The last Word’s Jesus speaks in the Bible in the Book of Revelation are ‘(I am) the bright and morning star’.
" I Jesus have sent mine angel to testify unto you these things in the churches. I am the root and the offspring of David, [and] the bright and morning star." - Rev 22:16 KJV
I believe an event with Venus will herald Jesus’ return as hidden in Daniel’s numbers 1260, 1290 and 1335, but that story is for another day.