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Garrad on March 1st, 


            José J. Chambó

Technical card

Resolution: 1280x853

Dates:March 1, 2012

Frames: 8x185" ISO400

Integration: 0.4 hours

Darks: ~10

Flats: ~10

Bias: ~100

Avg. Moon age: 7.79 days

Avg. Moon phase: 54.33%

Bortle Dark-Sky Scale: 6.00

Mean SQM: 18.90

Mean FWHM: 4.65

Temperature: 7.00


Although with maximum brightness because your second approaching to Earth, in this image the comet Garradd shows a coma near 10' of diameter and 6.5 magnitude. Spite of this, it can see barely your dust tail leftwards and gas tail toward right and down.

More info into the Blog  C O M E T O G R A F I A  (in Spanish)



José J. Chambó
License: Attribution-NonCommercial-NoDerivs Creative Commons


Garrad on March 1st, 


            José J. Chambó