Astro Calendar

2017 Events

January

January 1: Crescent Moon 4° below Venus
January 2: Crescent Moon 3° below Mars
January 3-4: Quadrantids meteor shower
January 12: Venus 22 arc-minutes north of Neptune
January 31: Waxing crescent Moon near Venus and Mars

February

February 10: Penumbral lunar eclipse at moonrise
February 11: Comet 45P/Honda-Mrkos-Pajdusakova passes near Earth
February 16: Venus at brigthtest (mag -4.8)
February 26: Mars 0.5° above Uranus

April

April 7th: Jupiter at opposition
April 7th: Comet 41P/Tuttle-Giacobini-Kresak passes near Earth (brightest)

August

August 21st: Total Solar Eclipse for North America

Recent Posts

Animation – Movement of Comet 41P

The word “planet” comes from the Greek work “planan” which means to wander. Early star gazers noticed that some bright stars moved with respect to other fixed stars.  Those bright stars are our closest planets: Mercury, Venus, Mars, Jupiter and Saturn. Comets also move a fair bit across the sky, but the origin of the word has more to do about stars “with long hair” than it’s traveling behavior.

Last weekend I managed to photograph comet 41P//Tuttle–Giacobini–Kresák, and I identified in my blog that it’s movement was visible frame to frame. Well I’ve finally gotten around to create a small animation of that movement. For those wondering what’s the comet’s velocity, it’s currently travelling at 37.4 km/s.

Animation of comet 41P/Tuttle–Giacobini–Kresák (45 minutes)

Animation of comet 41P/Tuttle–Giacobini–Kresák (41 minutes)

The above is composed of 32 frames, each a 1 minute exposure spanning a time of 41 minutes. You are probably thinking “it should be 32 minutes, not 41!”. That is because I have a delay between each frame to allow the camera to send the photo to the computer. Hence between the first and last frame, 41 minutes have elapsed.

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