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Data
 


Globular Clusters SDB
for all sky plotting

  • Cataloged data in TheSky explained in detail

  • Download the SDB 27K Zipped file

  • Data Wizard (TheSky6 Professional Edition)

  • Instructions for adding SDB files to TheSky6

  • What is an SDB?

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    Downloads

    Here are the steps necessary to create the SDB file that contains all Globular Clusters using the TheSky's Data Wizard. A database query is made by selecting the NGC/IC catalogs and the Query is limited to only the Globular Clusters, Open Clusters, and Clusters with Nebulosity.

    When the above Download the SDB as been downloaded and unzipped it needs to be added to the Active list of SDB's using Data | Database Manger - Instructions for adding SDB files to TheSky6

     

    NOTE: If you want to refine the database query even further you can limit it to only Open Clusters and or Globular Clusters and or Clusters+Nebulosity. This example shows a query on ALL Clusters.

     

    WARNING! Because the NGC/IC data contains many objects that do not have a magnitude associated with them (309 total) if you add a magnitude filter to the query you will not get the results you expect. Many of the bright clusters will not be found by the magnitude filter because they have been assigned a default value of magnitude 30.00.

    Query the NGC/IC data

    For all Clusters - Open, Globular, and Globular+Nebulosity

    Select the fields of interest

    Check the fields you want

    When the Query has been defined you can run the query and then you will see your results. The following query has resulted in 870 Clusters.

    The end result

    All clusters sorted by magnitude

    Exporting the text file

    When you have the results you want the data can be Exported to an ASCII text file and then compiled into an SDB file.

    The result! All Clusters plotted at all zoom levels. Note the all sky distribution of the clusters.

    Wide Field showing ALL Clusters

    Cool!

    Magnitude 30 - What gives?

    Because the NGC/IC data has objects that do not have a magnitude (they have a non existent magnitude) these have been assigned magnitude 30.

    Attribute filter Magnitude = 30

    309 Cluster with a non existent magnitude

    Cataloged data in TheSky explained in detail