Hemisphere:  Northern  ·  Constellation: Hercules (Her)  ·  Contains:  Solar system body or event
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Garradd & M92: Virtual encounter, 


            José J. Chambó
Garradd & M92: Virtual encounter
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Garradd & M92: Virtual encounter

Technical card

Imaging telescopes or lenses: GSO Newton 8" f/4

Imaging cameras: Canon EOS 350D / Digital Rebel XT

Mounts: LXD75

Guiding telescopes or lenses: Bresser Skylux 70/700

Guiding cameras: Meade DSI

Software: PHD guiding  ·  DeepSkyStacker  ·  PixInsight LE  ·  APT - Astro Photography Tool

Accessory: Teleskop-Service Coma Corrector

Dates:Feb. 3, 2012

Frames: 1x210" ISO400

Integration: 0.1 hours

Darks: ~8

Flats: ~10

Bias: ~100

Avg. Moon age: 10.38 days

Avg. Moon phase: 79.76%

Bortle Dark-Sky Scale: 6.00

Mean SQM: 19.00

Mean FWHM: 5.11

Temperature: -1.00

Basic astrometry details

Astrometry.net job: 4344957

RA center: 17h 15' 5"

DEC center: +43° 0' 21"

Pixel scale: 4.693 arcsec/pixel

Orientation: 359.278 degrees

Field radius: 0.974 degrees

Resolution: 1200x890

Locations: Vallés - Valencia (Spain), Vallés, Valencia, Spain

Data source: Unknown


Virtual encounter: far of Mars' orbit at 12.5 light-minutes from Earth, the comet Garradd shines with 7 magnitude and shows your wide dust tail that opens in fan behind, and your long and stretched ion tail that extends toward right (barely visible into image). At left and in the end of our galaxy, at 5.000 light-years away, the globular cluster M92 contains thousand old stars, wich together shine in our sky with 6 magnitude, more than the comet infinitely near.

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


Sky plot

Sky plot


Garradd & M92: Virtual encounter, 


            José J. Chambó

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