59P/Kearns-Kwee - Photometry


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The Photometry of my comet images is made with MaxIm DL Version 3.22. This program offers a quite good possibility to easily perform the photometry of a series of images.

First I select some reference stars with a magnitude around the comet's mag using TheSky level VI. Only USNO magnitudes are used. The Aperture Radius of the photometry area depends on the size of the inner coma of the comet. In the case of comet 59P/Kearns-Kwee  I selected an aperture of 6. The Gap Width is selected to its maximum size of 10. The Annulus Thickness is set to 5, not too much. The stars should have no neighbors around.


The result of the photometry made by MaxIm DL is the following graph:

It shows the performed photometry data of all selected reference stars and of the comet. The program is automatically snaping the "moving" comet on all images, no manual work has to be done. Finally I save the data on a .CSV file and load them into an excel sheet.

T (JD)

Ref1

Ref2

Ref3

Ref4

Ref5

Ref6

Obj1

245.482.039.925

13.253

15.988

16.237

13.858

15.928

16.117

17.430

245.482.040.281

13.241

16.034

16.234

13.850

15.905

16.116

17.404

245.482.040.636

13.246

15.994

16.223

13.855

15.920

16.141

17.346

245.482.040.992

13.244

16.025

16.221

13.851

15.952

16.087

17.809

245.482.041.347

13.256

15.981

16.226

13.868

15.920

16.128

17.718

245.482.041.702

13.243

16.014

16.238

13.841

15.920

16.124

17.651

245.482.042.057

13.255

16.002

16.245

13.858

15.907

16.113

17.654

245.482.042.413

13.247

16.025

16.221

13.852

15.899

16.136

17.705

 

 

 

 

 

 

 

 

Average

13.248

16.008

16.231

13.854

15.919

16.120

17.590

In excel I compute the average values of the object and use the computed value of 17.590 mag for the comet.

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Copyright: The author of NEO Planner and all sites of this web is Bernhard Haeusler, Dettelbach, Germany, all rights reserved