Coming Attraction: Geminid Meteor Shower 2011

It’s the finale of this year’s meteor showers: The Geminids will start appearing on Dec. 7 and should reach peak activity around the 13th and 14th. This shower could put on a display of up to 100+ meteors (shooting stars) per hour under good viewing conditions.

However, conditions this year are not ideal with the presence of a waning gibbous Moon (which will be up from mid-evening until morning). But seeing meteors every few minutes is quite possible. Geminid meteors are often slow and bright with persistent coloured trails which can linger for a while after the meteor has burned up.

There is something unusual about the Geminid meteor shower, as normally meteor showers are caused by the Earth ploughing through the debris streams created by comets and their tails. But the object that created the specific stream of debris associated with the Geminids is not a dusty icy comet, but a rocky asteroid called Phaethon 3200.

Phaethon 3200 belongs to a group of asteroids whose orbit cross the Earth’s. It turns out to be an unusual member of that group: Not only does it pass closer to the Sun than the others but it also has a different colour, suggesting a different composition to most asteroids.

Credit: Adrian West

One of the curious things about the Geminid particles is that they are more solid than meteoroids known to come from comets. This is good for meteor watchers; giving us brighter meteors.

Observations by astronomers over decades have shown that meteor rates have increased as we reach denser parts of the stream.

It is not known exactly when the asteroid was deflected into its current orbit, but if it was originally a comet it would have taken a long time for all the ices to have been lost. However, it is possible that it may have been a stony asteroid with pockets of ice.

We are unsure of the origins and appearance of Phaethon 3200, but its orbit has left us with a unique legacy every December, with little steaks of light known as the Geminid meteor shower.

You will only need your eyes to watch the meteor shower, you do not need telescopes binoculars etc, but you will need to be patient and comfortable. See this handy guide on how to observe meteors

During a meteor shower, meteors originate from a point in the sky called the radiant and this gives rise to the showers name e.g. The Geminids radiant is in Gemini, Perseids radiant is in Perseus etc.

Don’t be mislead by thinking you have to look in a particular part of or direction of the sky, as meteors will appear anywhere and will do so at random. You will notice that if you trace back their path or trajectory it will bring you to the meteor showers radiant. The exception to this rule is when you see a sporadic or rogue meteor.

Tell your friends, tell your familly and tell everyone to look up and join in with the Geminid meteorwatch on the 12th to the 14th December 2011. Use the #meteorwatch hashtag on twitter and visit for tips and guides on how to see and enjoy the Geminids and other meteor showers.

Credit: Wally Pacholka

13 Replies to “Coming Attraction: Geminid Meteor Shower 2011”

  1. Thanks for the heads up! Pun intended!
    On another note, and sorry to abscond with your comment section but the home page header is shocking in two ways…stars within the circumference of the moon AND if the crescent were really like that in the sky, the sun would still be UP! Please, there are graphic artists who know a little about space! Myself included…graphic on way.

  2. I was wondering what I saw last night but is sure did not seem like a “shooting star” seemed more like a star on fire then poof it was gone.

  3. I JUST witnessed one of these in the most unlikely place i’d think i’d see one. My friend and I are in Naperville, IL. and just drove past a Meijer, but right before that we saw a flashing green light that looked like a Meteor or some sort of Shooting star and it lasted forever it seemed, then just got lost among the dark atmosphere. Amazing. I will never forget. Life’s little treasures =)

    1. I live in Chicago and last night on my way home I saw the same thing. It was incredible! It was bright, was lit for like 5 seconds, then just disappeared.

    2. That thing was HUGE! It came down below the clouds and kept getting brighter! It looked more like a comet.

  4. My husband is a police officer who works the midnight shift, and he saw one a little before midnight on Dec. 7th. Said it was beautiful!

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