Meet Geminid


Tomorrow the annual Geminid meteor shower peaks. Every December Earth crosses paths with asteroid 3200 Phaethon – more accurately, asteroid junk left behind when Phaeton orbits extremely close to the sun.  Extreme solar heat causes expansion and “cracking”, a process responsible for trails of asteroid debris. 3200 Phaethon may be a paltry 5 Km. across, yet delivers a respectable average of 120 meteors an hour.

Technically visible anywhere on the planet, Geminids are considered a Northern Hemisphere show.Named for their radiant point, constellation Gemini – the higher Gemini rises, the more fireballs we see. Northern latitudes lay eyes on a early rising, high soaring Gemini, southern latitudes can still say hello – they just have to wait a little longer (or earlier if you consider pre-dawn morning).

Gaze toward the eastern horizon – Gemini reaches its highest point around 2 AM. Get away from city lights, settle in, give yourself 20 minutes oor so until your eyes adjust, and above all – happy Geminids.

http://earthsky.org/space/everything-you-need-to-know-geminid-meteor-shower

The Geminid meteors radiate from near star Castor in Gemini.

Geminids and Gibbous Moons


When the Geminid meteor shower peaks on Dec. 13 and 14, a pesky, almost full moon is poised to steal fireball thunder. The annual Geminids are one of the most prolific night shows, with an average of 120 meteors an hour. As if losing ISON wasn’t bad enough; a bright winter moon is expected to reduce visible meteors 2 – 5 fold.

Annual meteor showers result from earth’s orbit intersecting debris from a sun orbiting comet. Radiant point, is the name given to this intersection. Debris from comet 3200 Phaethon happens to intersect our orbit in the vicinity of constellation Gemini, hence – Geminids. To find Gemini, look for the star Castor, low on the east, north-east sky around 9 PM. Castor is one of the brightest stars in the sky and along with Pollux, make up the ” twin brothers ” of Gemini. The reason Geminids produce so many visible meteors is that the constellation and radiant point swing upward; by 2 AM the point is directly above you in the sky. The angle of the radiant, translates into no poor seats for this show – you can see it from anywhere, with 2 AM as your prime time.

This year we have a waxing gibbous moon to deal with – not a deal breaker, but grounds for some new rules. Since the nearly full moon is so bright, you should wait until the moon sets. This year pre-dawn moon set offers the best view. Get out of town – away from city lights – and give yourself a few minutes to adjust to the darkness. Gibbous moon aside – I guarantee you’ll see fireballs – you don’t even have to find Gemini, the Geminids have a crazy way of appearing to come from any direction.

http://earthsky.org/astronomy-essentials/radiant-point-for-geminid-meteor-shower

To find out when the moon sets in your little corner of the world – a link…..

http://www.usno.navy.mil/USNO/astronomical-applications/data-services

Ponder the last time you wished upon a falling star.

Jupiter, Castor and Pollux rise at early-to-mid evening in early December but at dusk or nightfall  by the month's end.

Jupiter, Castor and Pollux rise at early-to-mid evening in early December but at dusk or nightfall by the month’s end.

Geminid Meteor Shower


The weather outside is frightful, the Geminid shower is delightful. Peaking on Dec. 13 and 14, for those willing to bundle up in pre-dawn hours; expect up to 100 meteors an hour. Named the Geminid meteor shower as it appears to come from the direction of constellation Gemini. Geminid is believed to be debris from comet 3200 Phaethon, Phaethon broke apart after one too many close orbits to the sun melted its icy exterior.

According to earthsky.org the best time to witness Geminid is between 1 and 3 AM on Dec. 14. Bundle up, drive far from city lights, and restore your soul.

The bright streak of a Geminid meteor pierces the night sky over California's Mojave Desert during the annual meteor shower's 2009 peak.

A bright Geminid meteor pierces the night sky over California’s Mojave Desert in 2009.

Photograph by Wally Pacholka, TWAN