Astroid 2006 BL8 to pass the Earth at 502 000 km.

On Friday 26 July 2013, at 2.35 am GMT, the asteroid 2006 BL8 will pass the Earth at a distance of 503 000 km, roughly 9.3 time the average distance between the Earth and the Moon. There is no danger of the asteroid hitting the Earth, and even if it did, since it is only 48 m across, it is unlikely that much of it would make it through the atmosphere. 

The orbit's of 2006 BL8 and the inner four planets of the Solar System. Image created using the JPL Small Body Database Browser.

2006 BL8 (the name means the 211th object discovered in the second half of January 2006) is an Apollo Group Asteroid (i.e. one who's orbit crosses that of the Earth) with an orbital period of 434 days, which takes it out from the Sunas far as the orbit of Mars and in nearly to the orbit of Venus, though it is unlikely to interact with either of those planets, as its orbit is oblique to the plain of the Solar System, so that it is above that plain when near to the orbit of Venus and bellow that plain when near the orbit of Mars.

The orbit of 2006 BL8 relative to the plain of the Solar System. Image created using the JPL Small Body Database Browser.

See also Asteroid 2013 NJ4 makes a close pass to the Earth, The ejecta of Main-Belt Comet P/2012 T1 (PANSTARRS), Asteroid 2013 NH4 passes by the Earth, Ancient meteorite found in Minnesota field and Imaging near-Earth asteroid (162421) 2000 ET70.

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The Geminid Meteors.

The Geminid Meteors peak each year on or around the night 13-14 December radiating from a point in the constellation of Gemini. They are visible from around the globe, but are harder to observe in the southern hemisphere, since Gemini does not rise far above the horizon at this time of year. They were first observed in 1860, and have apparently been gradually getting brighter each year since then, leading some scientists to speculate that the path of the meteor shower might have recently been perturbed by the planet Jupiter, shifting it into the Earth's path.

The point of origin of the Geminid Meteors. Meteor Showers Online.

Oddly for a meteor shower, the Geminids do not appear to be related to a comet, but instead are associated with an object called 3200 Phaethon, which is classed as an Apollo Asteroid (an asteroid with an orbit that crosses that of the Earth). 3200 Phaeton has a highly elliptical orbit, which takes it in as close as 0.14 Au (14% of the distance between the Earth and the Sun, more than twice as close as Mercury) and out as far as 2.4 AU (2.4 times as far from the Sun as the Earth or 1.6 times as far as Mars). 3200 Phaethon does not appear to produce any sort of halo (a cloud of material produced by the evaporation of gas ice from the surface of a comet, thought to be the source of most meteor showers); rather it appears dark in colour an is classed as a B-type Carbonaceous Asteroid, thought to have a surface covering of  anhydrous silicates, hydrated clay minerals, organic polymers, magnetite, and sulphides.

The orbit of 3200 Phaeton. Image created using the JPL Small-Body Database Browser.

See also The Leonid Meteors, Four more asteroids found to be co-orbitals of Neptune, Asteroid 2012 TC4 passes within 95 000 km of the Earth, Comet C/2012 S1 (ISON) to pass within 60 000 000 km of the Earth and The Perseid Meteors. 

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