It's impossible to tell you the exact bright star in the eastern sky at 5 am without knowing your location and the current date.

Here's why:

* The Earth's Rotation: The stars appear to move across the sky due to the Earth's rotation. What's visible in the east at 5 am will change depending on where you are on the globe.

* Time of Year: The position of stars changes throughout the year as the Earth orbits the Sun.

To find out what bright star you're seeing, you can:

1. Use a Stargazing App: Download a stargazing app like SkySafari, Stellarium, or Star Walk 2. Enter your location and the date/time, and the app will show you a map of the stars visible in your sky.

2. Consult an Online Star Chart: Many websites offer interactive star charts, like the one on the website of the International Astronomical Union (IAU). You can enter your location and date/time to see the star chart for your location.

Tip: If the star is particularly bright and has a reddish hue, it might be Mars!