Tag Archives: Fireballs

Looking Up!

dragon reads ebook final mergedSky events for December 2015

RASCal Geoff Gaherty posts an excellent blog for sky events. He tends to concentrate on the moon, planets, and brightest stars, so it’s great for urban star gazers armed with digital devices. You might want to bookmark the site and return to it when the mood grabs you.

On the 3rd of December, Japan’s Hayabasa 2 spacecraft, on a six year mission to catch and sample an asteroid, will fly past Earth. Earth’s gravity will slingshot the spacecraft toward its target, 162173 Ryugu, which Hayabasa 2 is expected to reach in July 2018. This animation from JAXA (the Japanese space agency) previews the flyby. READ MORE: http://www.spaceweather.com/


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You will not want to miss the Geminid meteor shower, which always puts on a good show.   The peak nights are expected to be on December 13-14 (night of December 13 till dawn December 14) and 14-15 (night of December 14 till dawn December 15).

orbits
In this diagram of the inner solar system, all of The fireball orbits intersect at a single point–Earth. The orbits are color-coded by velocity, from slow (red) to fast (blue). Click for larger view

Every night, a network of NASA all-sky cameras scans the skies above the United States for meteoritic fireballs. On Dec. 2, 2015, the network reported 27 fireballs. Automated software maintained by NASA’s Meteoroid Environment Office calculates their orbits, velocity, penetration depth in Earth’s atmosphere and many other characteristics. Daily results are presented on Spaceweather.com