NASA experts will hold a teleconference for news media at 4 p.m. EST today to discuss a meteor that streaked through the skies over Russia’s Urals region this morning.
Scientists have determined the Russia meteor is not related to asteroid 2012 DA14 that will pass safely pass Earth today at a distance of more than 17,000 miles. Early assessments of the Russia meteor indicate it was about one-third the size of 2012 DA14 and traveling in a different direction.
Panelists for the teleconference are:
— Bill Cooke, lead for the Meteoroid Environments Office at NASA’s Marshall Space Flight Center in Huntsville, Ala. — Paul Chodas, research scientist in the Near Earth Object Program Office at NASA’s Jet Propulsion Laboratory in Pasadena, Calif.
The teleconference will be carried live online at:
This morning at 6:43 AM Central Standard Time, eyewitnesses across Texas and adjacent states saw a very bright fireball streaking across the sky, moving roughly east to west. It was also recorded by a NASA meteor camera in Mayhill, New Mexico some five hundred miles to the West, which is very unusual and testifies to the brightness of the event. This was not the re-entry of Kosmos 2251, which was destroyed in a collision with an Iridium satellite in February 2009; it is a meteor, most likely a fragment from the asteroid belt and not associated with the Geminid meteor shower.
Preliminary results indicate that there are meteorites from this meteor on the ground north of Houston, Texas–analysis is currently underway to refine the impact area. If pieces are recovered, it will be the 13th meteorite fall recorded in the state since 1909, and the first since Ash Creek, which fell in February of 2009.
A video (in Windows Media format) of the fireball as recorded by the NASA camera in New Mexico is attached to this message. The Moon is the bright object at lower center; the fireball is on the horizon at left and is surrounded by a white box when the camera detects it. Up is north, and left is east in the video.
There was a bright fireball visible over north Georgia, eastern Tennessee, and South Carolina at 7:02:36 PM EST last night. All 4 NASA meteor cameras in the SouthEast picked it up 48 miles above the town of Rossville, just south of Chattanooga, moving at 9 miles per second (32,400 mph) slightly north of east. The meteor appears to have ablated (“burned up”) at 23 miles altitude SW of of Ocoee, TN. Though unusual, it is unlikely that this object produced any noticeable meteorites on the ground.
Orbit indicates that this meteor was asteroidal in origin, with an aphelion (farthest point from the Sun) in the main asteroid belt between Mars and Jupiter.
Asteroid 433 Eros made a close approach to Earth the morning of January 31st coming within 0.17 AU (15 million miles) of our planet. In this set of images taken that morning, the bright moving dot near the center of the field is the 21 mile long Eros. Somewhere on that tiny point of light rests a United States spacecraft — Near Shoemaker — which touched down on the asteroid’s surface on February 12, 2001 after completing 230 orbits around Eros.
In the animation you will also notice over 20 streaks of light moving almost horizontally across the field of view. What we did not realize at the time of imaging was that Eros was at approximately the declination of geosynchronous communication satellites! These satellites are orbiting some 22,236 miles above the earth in the “Clark belt.” We were able to identify most of the satellites seen and found quite a variety.
Included in the video are Brazilian satellites (Brazilsat B2, Star One C2); American satellites (Galaxy 11); Canadian satellites (Nimiq 4, Anik F1); Venezuelan satellites (Venesat-1); weather satellites (GEOS 12); television satellites (DirecTV 1-R); radio satellites (XM 3, Sirius FM); and Internet satellites (WildBlue – 1).
MSFC’s all sky meteor camera recorded this bright meteor last night (November 1st) at 9:04 pm CDT. Blazing across the sky at 40 miles per second (144,000 mph), the 1 inch visitor from space took only 3.3 seconds to go 132 miles, starting at a point just northeast of Athens, Alabama and burning up west of Tuscaloosa.
A wide field meteor camera at NASA’s Marshall Space Flight Center recorded this spectacular meteor breaking up in Earth’s atmosphere on Sept. 30, 2011, 8:37 p.m. EDT. Also visible is a star-like object moving slowly toward the upper middle of the field of view — the upper stage of the Zenit booster that launched the Russian Cosmos 2219 intelligence satellite back in 1992. Orbiting 500 miles above Earth, this empty rocket body can get bright enough to be seen with the unaided eye.
Initial speed: 23.6 km/s (52,800 mph) Start location: 84.131 W, 33.981 N, Altitude 104.6 km (65.0 miles) End location: 84.109 W, 33.524 N, Altitude 41.3 km (25.7 miles)
View from all sky camera located at Huntsville, Al.
View from all sky camera located at Tullahoma, Tenn.
View from all sky camera located at Cartersville, Ga.
The meteor was too bright for the all sky camera in Cartersville, Ga., to accurately determine the center of light, so manual analysis will be required to determine a more accurate end point. Results will be posted here on the blog as they become available.
Video and image credits: NASA/MSFC/Meteoroid Environment Office
Three meteoroids were seen hitting the moon last week — all of them possible pieces of Comet Halley! The Eta Aquariid — the meteor shower caused from Comet Halley, see post below — radiant was positioned so that almost the entire visible part of the moon was exposed to it. On the evenings of May 9-11, members of the Meteoroid Environment Office were out doing lunar observations and a meteoroid impact was seen each night.
The peak of the Eta Aquariids was the morning of May 5, but the rate is still high and meteors associated with this shower were still seen last week in multiple cameras over Alabama and surrounding states.
The following images are stills from the videos recorded those evenings; the impacts are seen on the dark portion of the moon.
The movie below is the meteoroid impact from May 11 and after taking into account the brightness of the flash and the large amount of glare from the moon, this is one of the largest impacts we have seen to date!
What are the signs of spring? They are as familiar as a blooming daffodil, a songbird at dawn, a surprising shaft of warmth from the afternoon sun. And, oh yes, don’t forget the meteors.
“Spring is fireball season,” says Bill Cooke of NASA’s Meteoroid Environment Center. “For reasons we don’t fully understand, the rate of bright meteors climbs during the weeks around the vernal equinox.”
In other seasons, a person willing to watch the sky from dusk to dawn could expect to see around 10 random or “sporadic” fireballs. A fireball is a meteor brighter than the planet Venus. Earth is bombarded by them as our planet plows through the jetsam and flotsam of space–i.e., fragments of broken asteroids and decaying comets that litter the inner solar system.
In spring, fireballs are more abundant. Their nightly rate mysteriously climbs 10% to 30%.
“We’ve known about this phenomenon for more than 30 years,” says Cooke. “It’s not only fireballs that are affected. Meteorite falls–space rocks that actually hit the ground–are more common in spring as well1.”
Researchers who study Earth’s meteoroid environment have never come up with a satisfactory explanation for the extra fireballs. In fact, the more they think about it, the stranger it gets…