Part XIII
Tables

Table I
Right Ascension and Declination Calibration Stars

To use these stars to set the right ascension (RA) setting circle, it is assumed the telescope is properly aligned, just center one of the stars, from the table above, in the eyepiece and rotate the RA setting circle until it reads that star's RA. The setting circle is now calibrated and a new star can now be found by moving the telescope to the new star's listed RA and DEC.

Note:
The RA and DEC are given in hours / minutes and degrees / minutes respectively. The Declination circle of the telescope can also be checked with these stars.

Reference:
THE BRIGHT STAR CATALOG, Fourth Revised Edition 1982

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Table II
UBV Calibration Stars

Reference:
THE BRIGHT STAR CATALOG, Fourth Revised Edition 1982

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Table III
Stars for Determining 1st-Order Extinction Coefficients

It is important when observing the above stars for determination of the First-Order Extinction Coefficients that the stars be picked for B - V close to zero and U - B close to zero. In addition, it is very important that the stars vary in altitude by about 60 degrees. If the stars are too close together, very misleading results can be obtained.

Reference:
THE BRIGHT STAR CATALOG, Fourth Revised Edition 1982

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Table IV
Suggested Program Stars

 

 

Present Page Version as of 23 March 2004

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