C/2006 W3 (Christensen) - 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 C/2006 W3 (Christensen) I select the Aperture of 10. Also 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.

Obj1 = comet, Ref1-Ref6 = Stars

2008-12-07 by Bernhard Haeusler, Maidbronn, Germany


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

245.481.519.069

11.531

13.266

12.860

10.914

11.748

13.912

12.645

245.481.519.284

11.527

13.272

12.863

10.929

11.742

13.897

12.654

245.481.519.500

11.518

13.279

12.870

10.916

11.740

13.906

12.681

245.481.519.715

11.484

13.306

12.901

10.860

11.755

13.924

12.751

245.481.519.930

11.505

13.280

12.883

10.937

11.723

13.902

12.735

245.481.520.145

11.520

13.275

12.877

10.950

11.714

13.893

12.721

245.481.520.361

11.556

13.239

12.847

11.030

11.693

13.865

12.678

245.481.520.577

11.517

13.270

12.872

10.973

11.708

13.889

12.704

245.481.520.792

11.496

13.289

12.891

10.918

11.729

13.906

12.713

245.481.521.008

11.505

13.273

12.880

10.949

11.722

13.901

12.679

245.481.521.224

11.588

13.215

12.824

11.084

11.683

13.836

12.589

245.481.521.439

11.504

13.281

12.885

10.937

11.720

13.902

12.633

245.481.521.654

11.502

13.284

12.879

10.938

11.722

13.905

12.629

245.481.521.870

11.547

13.242

12.849

11.020

11.697

13.874

12.560

245.481.522.086

11.562

13.236

12.846

11.030

11.691

13.865

12.580

245.481.522.301

11.549

13.253

12.858

11.006

11.698

13.867

12.617

245.481.522.516

11.609

13.203

12.812

11.103

11.682

13.822

12.589

245.481.522.732

11.612

13.197

12.810

11.108

11.681

13.822

12.610

245.481.522.947

11.551

13.241

12.848

11.024

11.693

13.873

12.683

245.481.523.163

11.563

13.232

12.842

11.050

11.689

13.853

12.687

245.481.523.379

11.570

13.234

12.841

11.049

11.687

13.849

12.692

245.481.523.595

11.580

13.225

12.830

11.074

11.681

13.840

12.681

245.481.523.811

11.577

13.225

12.837

11.052

11.687

13.852

12.680

245.481.524.026

11.550

13.248

12.852

11.016

11.695

13.869

12.675

245.481.524.242

11.604

13.208

12.818

11.092

11.682

13.826

12.613

245.481.524.458

11.566

13.230

12.840

11.053

11.690

13.852

12.630

245.481.524.674

11.534

13.259

12.866

10.992

11.704

13.876

12.665

245.481.524.890

11.545

13.254

12.861

11.008

11.697

13.864

12.658

245.481.525.106

11.530

13.264

12.874

10.971

11.705

13.886

12.677

245.481.525.322

11.544

13.259

12.870

10.981

11.704

13.872

12.674

245.481.525.537

11.563

13.239

12.847

11.028

11.691

13.863

12.652

245.481.525.752

11.587

13.223

12.826

11.068

11.684

13.842

12.628

245.481.525.968

11.574

13.231

12.837

11.053

11.683

13.852

12.654

245.481.526.183

11.567

13.233

12.841

11.046

11.687

13.856

12.650

245.481.526.399

11.530

13.261

12.863

10.993

11.703

13.880

12.671

245.481.526.615

11.509

13.276

12.879

10.955

11.718

13.893

12.669

245.481.526.830

11.528

13.270

12.874

10.964

11.710

13.884

12.658

245.481.527.046

11.530

13.263

12.868

10.980

11.708

13.881

12.642

245.481.527.261

11.556

13.240

12.851

11.018

11.694

13.870

12.613

245.481.527.477

11.521

13.267

12.869

10.980

11.704

13.889

12.631

245.481.527.692

11.591

13.217

12.822

11.083

11.679

13.837

12.563

245.481.527.908

11.566

13.241

12.840

11.044

11.686

13.852

12.574

245.481.528.123

11.486

13.298

12.897

10.902

11.734

13.913

12.660

245.481.528.339

11.514

13.278

12.881

10.945

11.718

13.894

12.650

245.481.528.556

11.541

13.249

12.857

11.017

11.691

13.875

12.640

245.481.528.772

11.527

13.268

12.875

10.965

11.705

13.890

12.666

245.481.528.987

11.584

13.224

12.827

11.080

11.676

13.839

12.617

245.481.529.203

11.498

13.291

12.891

10.924

11.718

13.907

12.715

245.481.529.418

11.584

13.226

12.831

11.065

11.681

13.843

12.656

245.481.529.634

11.567

13.239

12.848

11.039

11.687

13.850

12.675

245.481.529.850

11.553

13.244

12.853

11.027

11.692

13.862

12.682

245.481.530.065

11.499

13.286

12.883

10.935

11.718

13.909

12.728

245.481.530.281

11.452

13.334

12.935

10.786

11.766

13.957

12.792

245.481.530.497

11.522

13.258

12.870

10.982

11.705

13.893

12.701

245.481.530.713

11.533

13.259

12.863

10.985

11.700

13.889

12.702

245.481.530.928

11.513

13.282

12.879

10.933

11.718

13.905

12.726

245.481.531.144

11.542

13.255

12.859

11.013

11.698

13.862

12.695

245.481.531.360

11.539

13.258

12.857

11.009

11.699

13.868

12.695

245.481.531.575

11.484

13.299

12.886

10.912

11.729

13.919

12.737

245.481.531.791

11.518

13.272

12.865

10.977

11.710

13.888

12.691

245.481.532.007

11.508

13.278

12.877

10.951

11.716

13.900

12.703

245.481.532.222

11.507

13.283

12.877

10.956

11.712

13.895

12.685

245.481.532.438

11.538

13.266

12.861

10.992

11.696

13.877

12.640

245.481.532.654

11.530

13.265

12.861

11.011

11.695

13.867

12.617

245.481.532.870

11.514

13.270

12.871

10.979

11.707

13.889

12.598

245.481.533.086

11.488

13.296

12.891

10.910

11.725

13.919

12.610

245.481.533.301

11.496

13.297

12.886

10.920

11.725

13.906

12.597

245.481.533.517

11.526

13.265

12.863

10.994

11.700

13.882

12.581

245.481.533.733

11.491

13.288

12.888

10.933

11.725

13.906

12.623

245.481.533.949

11.478

13.298

12.892

10.905

11.729

13.928

12.632

 

 

 

 

 

 

 

 

Average

11.536

13.259

12.862

10.989

11.705

13.879

12.659

In excel I compute the average values of the object and use the computed value of 12.66 mag for the comet.

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Copyright of all sites and images of this web: Bernhard Haeusler, Rimpar, Germany   MPC code: B82 Maidbronn