Using the SQL Search Tool
Open the SQL Search tool.
You will see a textbox with a submit button below. Copy the following query and paste it into the textbox (deleting what is already there). Click "CSV" to request
results as a CSV (comma-separated value) file. Click Submit. Results will appear in a new window. Wait for all the results to appear — it should take between
one and three minutes for the query to run.
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select
s.objid, s.ra, s.dec, s.u, s.g, s.r, s.i, s.z
from
star s
join
dbo.fGetNearbyObjEq(229.0128,-0.1082,3) n
on n.objid = s.objid
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When the query is finished, save the results to your computer using the "Save" command in your browser. Be sure to save the file as plain text (not HTML), and to
give the file extension .csv.
Use Excel's "Import Text File" option to open the results in Excel (see SkyServer Graphing and
Analyzing Data tutorial to learn how to import). Look at the results.
The first column, "objid," is the SDSS's Object ID for each star. You can use this number to look up each star in the
Explore tool. The next two
numbers are the star's ra and dec. The next five numbers are the magnitudes u,g,r,i,z, which you will use to make your H-R diagram.
Now that you have your data, click the Previous button to go back to the previous page,
where you will make your H-R diagram.
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