# Graphing Your Data to Make a Map

You now have data for a number of different asteroids. On this page, you will make graphs of your data. These graphs will be maps of the Solar System.

**Explore 3.**Make graphs of the positions of asteroids on September 22nd, 2006. Make graphs of different numbers of asteroids – 10, 500, 1000, and so on.

Use a spreadsheet program to make the graphs. Here are instructions for how to make graphs in Excel .

If you don’t have Microsoft Excel, try one of the following spreadsheet programs (links open in new windows):

OpenOffice (all operating systems)

Put RA on the x-axis and Dec on the y-axis. Again, make sure your graph is twice as long as it is wide. The shape and axes of the graph should look like this:

**Question 4.**How many different graphs did you make? How many asteroids were on each graph?

**Question 5.**What shape do you see in the graphs? How many asteroids did you have to include before you could clearly see the shape?

**Question 6.**Remember that the graph you made is a map of the Solar System as seen from Earth. What do you think that shape you see means? Why does the map look like it does?