Cap'n Bob & the Damsel

Space Rocks

Fireball over Wickenburg

fireball.jpgDamsel and I were out in the courtyard to watch the overflight of the International Space Station this evening. It was still pretty light out and I wanted to see if I could see Sirius in Canis Major as a gauge for the predicted magnitude of the ISS at -1.9. Sirius is magnitude -1.46, a little less bright than the satellite.

Image: Similar fireball photographed over Russia.

When I turned my attention eastward to look at Sirius, a bright meteor streaked across the sky, bright white initially and turning to orange and breaking into fragments as I watched. It was gone by the time I called to Damsel to come and look. This is the first fireball meteor we have seen in Arizona and the first one I, personally, have seen in over 20 years of looking up. The image in this post is not of the event we witnessed tonight, but a stock image of a fireball seen over Russia in the past.

In scanning local news reports, I have not seen any mention of this event. The good news is that Damsel and I both saw a nice ISS pass which makes three out of four in this recent series of evening passes. One was rained out earlier in the week.

We like to keep looking up. The stars here are usually spectacular and we see the Milky Way most clear nights.

04 Feb 2016 by Arizona Astronomy Something Shiny Space Rocks

2006 Leonids Meteor Shower

Late Wednesday night, as Damsel and I were walking the dogs, the skies were exceptionally clear for the urban Los Angeles area. We were looking towards the “Seven Sisters” near the zenith when we saw a shooting star. It was probably an early Leonid meteor. This weekend will be a good time to look skyward, especially in the wee hours before dawn when the radiant (located in the constellation Leo) will be above the horizon and your part of the Earth will be plowing head-on into the dust trail left by comet 55P/Tempel-Tuttle.

Image: A Leonid “green fireball” meteor. (Courtesy NASA)

According to experts, you just might be able to see up to a hundred meteors per hour — that’s better than one a minute!

Continue reading…

17 Nov 2006 by Astronomy Science Space Rocks

Space Rock Lunar Impact Video

Not having an atmosphere to ward off small meteoroids, the Moon’s surface is under constant bombardment by space rocks. NASA scientists are now collecting data about impactors on the Moon with an eye on problems they may cause future Lunar explorers.

NASA – A Meteoroid Hits the Moon

June 13, 2006: There’s a new crater on the Moon. It’s about 14 meters wide, 3 meters deep and precisely one month, eleven days old.

NASA astronomers watched it form: “On May 2, 2006, a meteoroid hit the Moon’s Sea of Clouds (Mare Nubium) with 17 billion joules of kinetic energy—that’s about the same as 4 tons of TNT,” says Bill Cooke, the head of NASA’s Meteoroid Environment Office in Huntsville, AL. “The impact created a bright fireball which we video-recorded using a 10-inch telescope.”

Right: A meteoroid hits the Moon.
[Click here or on the image to see the video]

Lunar impacts have been seen before–“stuff hits the Moon all the time,” notes Cooke–but this is the best-ever recording of an explosion in progress.

[Read more]

Image courtesy NASA.

Hat tip to Dr. Tony Phillips of SpaceWeather.com

14 Jun 2006 by Astronomy Environment Science Space Rocks

Screwy “Second Moon” Leaving Earth

Few of us know that planet Earth has been host to a “second moon” for the past seven years. And now, this fickle little rock is going to move along. An Earth-orbit-crossing Space Rock got a little too close to the gravitational influence of our planet and has been screwing around for the past few years — but not for long.

NASA – Corkscrew Asteroids

June 9, 2006: News flash: Earth has a “second moon.” Asteroid 2003 YN107 is looping around our planet once a year. Measuring only 20 meters across, the asteroid is too small to see with the unaided eye—but it is there.

This news, believe it or not, is seven years old.

“2003 YN107 arrived in 1999,” says Paul Chodas of NASA’s Near Earth Object Program at JPL, “and it’s been corkscrewing around Earth ever since.” Because the asteroid is so small and poses no threat, it has attracted little public attention. But Chodas and other experts have been monitoring it. “It’s a very curious object,” he says.

Right: The typical corkscrew path of an Earth Coorbital Asteroid.

[more]

10 Jun 2006 by Astronomy Science Space Rocks

Binary Space Rocks Pass Earth Today


Like ships passing in the night, pair of space rocks zooms past Earth today at a distance of (only) 2.5 million miles. Dubbed Asteroid 2004 DC, the pair were not known to be a pair until radar reflections off the asteroid were detected by the Arecibo radar/radio telescope (remember the movie “Contact?”).

The green dot in the center near the bottom of the image below (from a NASA orbit simulation) is planet Earth. The scale of the image is such that the asteroid looks very close to our planet, but it is at quite a safe distance.

From SpaceWeather.com:

BINARY ASTEROID: Asteroid 2004 DC is flying by Earth today about 2.5 million miles away. Yesterday, astronomers using the giant Arecibo radar in Puerto Rico pinged the asteroid and discovered that it is actually two asteroids–a 60m rock orbiting a 300m rock. Researchers estimate that one in six near-Earth asteroids are binaries.

03 Jun 2006 by Astronomy Space Rocks

Hauling Ass – er – Asteroid, that is

From SPACE.com — Gravity-Powered Asteroid Tractor Proposed to Thwart Impact:

A concept spacecraft could use gravity to tow asteroids away from a collision course with earth. Credit: Dan Durda – FIAAA / B612 Foundation.

An asteroid the size of two football fields could wipe out a large city or set off a series of tsunamis across the world. The threat of such an Earth-smashing asteroid has lead scientists to dream up several methods of defending the planet against such a catastrophe.

Solutions have ranged from pushing the asteroid with a spacecraft to mounting a thruster on its surface. But pushing it would require too much fuel and could break up the asteroid. Also, asteroids rotate, which could complicate the firing of a surface thruster.

Now, two NASA astronauts have presented a plan for an “asteroid tractor”—an unmanned, 20-ton spacecraft that uses the invisible bond of gravity to gently pull an asteroid into a new, non-threatening orbit.

Read more.

Related item: check out my Space Rocks animation.

UPDATE: The Space Tractor is featured on today’s Astronomy Picture of the Day.

10 Nov 2005 by Aerospace Environment Rocket Science Space Rocks

The Sky is Falling!

You may have noticed some fireballs overhead the last few nights. It’s the annual Taurids meteor shower, seen as the Earth passes through the orbit of Comet Encke. This from SpaceWeather.com:

FIREBALL SIGHTINGS: In recent nights, sky watchers have seen some spectacular fireballs. Experts suspect it’s the Taurid meteor shower, a display caused by debris from Comet Encke.
Photo: a Taurid fireball photographed by Hiroyuki Iida of Toyama, Japan on Oct. 28th.

Most years the Taurid shower is weak, producing few meteors, mostly dim. 2005 appears to be different. Earth may be passing through a “swarm” of pebbles and rocks within the larger cloud of Taurid space dust. The pebbles are responsible for the fireballs.

The 2005 Taurid meteor shower is not over. Indeed, it’s just beginning. Forecasters expect the complex shower to peak during the first two weeks of November. So keep an eye on the sky!

Read the full story from Science @ NASA.

03 Nov 2005 by Astronomy Environment Science Space Rocks

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