News
2018, July 6 - A fresh-looking 18-g meteorite was found in the Central Kalahari Game Reserve during a search effort dedicated to finding debris from asteroid 2018 LA. The search was guided by Peter Jenniskens and conducted by three Botswana institutes, the Botswana International University of Science and Technology (BIUST), the Botswana Geosience Institute (BGI) and the University of Botswana at Maun Okavango Research Institute (ORI), and supported by Central Kalahari Game Reserve staff. Peter Jenniskens teamed with Oliver Moses of ORI (to the right in image above) and recovered video security camera footage in Maun and Rakops that helped constrain the disruption point and focus the search. Images were calibrated from star background by Jim Albers. Tim Cooper from ASSA calibrated videos to the south. Jelle Assink and Laslo Evers of the KNMI provided atmospheric wind data. The first meteorite was found by team member Lesedi Seitshiro on Saturday June 23 (center front in photo).
2018, June 2 - A small asteroid 2018 LA impacted Earth's atmosphere over Botswana today after it was spotted in space 8 hours prior by the Catalina Sky Survey (Richard Kowalski).
2017, October 2 - The airborne team provides support during NASA Ames Arcjet experiments on ablation of stony and iron meteorites. A unique opportunity to study a meteor up close. [Presentation]
[Public talk on WT1190F reentry]
[re-entry video]
2016, February 2 - Today, NASA Ames released a feature article about the publication of the AIAA SciTech 2016 paper on WT1190F. In addition, a new re-entry video was released.
2016, January 19 - At noon, there will be a Public talk on our project as part of the SETI Institute Weekly Colloquium.
2016, January 14 - The new observations now make the Trans-Lunar Injection Module of Lunar Prospector (a NASA-Ames led mission) the leading candidate for WT1190F's identity.
[Story on Nature.com]
2016, January 5 - The team's first results from the analysis of our WT1190F reentry video data were presented during a special session on Aerothermo-chemistry of Natural Meteors at the AIAA SciTech 2016 meeting in San Diego.
[Scientific paper: AIAA-2016-0999]
Wide field view of the WT1190F reentry as recorded by the SETI Institute team (compilation of all video frames, aircraft roll removed). This gives a good impression of the naked eye visibility.
Narrow field view recorded by the Dexter Southfield team, showing part of a single frame from a movie camera.
First results video
2015, November 13 - SUCCESS! Just back from completing instrument calibrations. The International Astronomical Center in Abu Dhabi issued a brief summary with some of our results of the airborne campaign a few hours ago. The remaining challenge proved to be the weather. It was raining in Sri Lanka. Much of our flight to the area saw haze above our flight altitude at 45,000 ft, but our navigator, pilot and first officer found a small clearing and managed to put the aircraft there at the right time. We had a perfect view of the WT1190F reentry, which was bright by naked eye. We have incredible imaging data and also succeeded in doing quality spectroscopy at blue and red wavelengths, which is a first for us in daytime conditions. Most successful was the team of Ron Dantowitz of Dexter Southfield, but also the IAC and UAE Space Agency teams did great.
Later stage of reentry as observed by the UAE Space Agency team.
2015, November 12 - Ready for deployment. After a day of hard work that saw the aircraft interior transformed into a small laboratory, over twenty cameras are now mounted and ready for deployment tomorrow. So far, so good. The weather could still make it challenging to position the aircraft at the right location in the right orientation to see the entry. Also, we hope that the object has enough mass and kinetic energy to see the entry in the daytime sky. If it does, the images below give an overview of the instrument teams onboard intent on observing the entry, from front to back of the aircraft (All photo's: IAC/UAE Space Agency/NASA/ESA).
In the galley: Jim Albers of the SETI Institute worked with Mike Koop to provide gps and timing data to the instruments.
Ron Dantowitz of Dexter Southfield (left) and Forrest Gasdia of Embry Riddle Aeronautical University will try to zoom in on the reentry with a Red Epic movie camera and several spectrographs in search of spectral signatures that could identify the nature of the object.
Host Mohammad Odeh (with video headset display) and Khalfan Al-Noimy of the International Astronomical Center in the United Arab Emirates will operate a second Red Epic camera with a wider field of view and a third spectrographic camera to document the fragmentation sequence.
Peter Jenniskens of the SETI Institute will operate eleven staring cameras with a wider field of view, including two spectographic cameras, to catch the reentry if pointing efforts fail.
Khalfan Al-Remeithi and Khaled Al Hasmi of the UAE Space Agency will attempt to point a narrow field imager to the reentry for high resolution fragmentation studies.
Stefan Loehle (foreground) and Fabian Zander of the Institut fuer Raumfahrtsysteme of the University of Stuttgart, Germany, will use an optical fiber to collect light and feed it to a small Echelle spectrograph for high-resolution spectroscopy studies of plasma processes and ablation emission signatures.
WT1190F is approaching Earth and now visible in small telescopes. This image was obtained by Marco Langbroek, Netherlands, using remotely the 0.61-m telescope of MPC G68 (click image to see it move).
2015, November 12 - The final trajectory update from our consortium support team has the impact location narrowly defined and a time uncertainty of only +/- 0.19s, reaching 100 km altitude at 06:18:22.35 UT on November 13.
2015, November 11 - All team members and their instruments arrived in Abu Dhabi this morning. Today was a day of introductions. We met with organizer Mohammad Odeh, director of the Internatonal Astronomical Center, and had lunch with Ahalfan Al-Noimy, IAC president and fellow traveler. We then visited the Al Bateen airport and met with Khalfan Al-Remeithi and Khaled Al Hashmi of the UAE Space Agency. We had our first tour of the G450 aircraft in the afternoon and met with the veteran pilot and first officer who will direct our flight. We made fit checks of our instrument setups and discussed the challenges of observing this reentry. Tomorrow, we will continue the instrument setups.
2015, November 11 - We received further trajectory updates, the formal precision now +/- 4.4 seconds in time. We are keeping an eye on the weather conditions near Sri Lanka.
Clay Center Observatory pointed narrow-field cameras for imaging and daytime spectroscopy
2015, November 9 - Ron Dantowitz of Clay Center Observatory of Dexter Southfield in Brookline, MA, is pleased to report that their team's instrument checks for high spatial resolution imaging and spectroscopy went well and they are on route to Abu Dhabi.
SETI Institute staring cameras against backdrop of Genesis capsule reentry.
2015, November 8 - Peter Jenniskens reports that the SETI Institute staring cameras for low-spatial resolution imaging and daytime slit-less spectroscopy have been tested and are ready for deployment.
Instrument tests at the Institute for Space Systems in Stuttgart, Germany (right) using the Moon in the daytime sky as a target.
2015, November 6 - The entry will be in broad daylight and perhaps difficult to spot. Stefan Loehle reports that the ESA-sponsored team from the Institut fuer Raumfahrtsysteme (IRS) successfullly tested their optical fiber-fed Echelle spectrograph by pointing to the Moon in the daylight sky. They are packed and ready for deployment.
2015, November 6 - The latest update from the Next TC3 Consortium Asteroid Detection and Early Warning team has the time and location of the WT1190F atmopsheric entry narrowed to better than +/-8 seconds in time and sufficiently accurate in position for flight planning purposes.
2015, November 4 - The International Astronomical Center (IAC) in Abu Dhabi announced today that the United Arab Emirates is sponsoring an airborne observing campaign to study the entry of space debris object WT1190F. The first practice mission for a future rapid response to an announced small asteroid impact is underway! The IAC and the United Arab Emirates Space Agency will host a team of veteran U.S. and German observers of spacecraft re-entries to study the predicted re-entry of an approximately 1-meter piece of space debris returning to Earth on an asteroid-like orbit near Sri Lanka on November 13, 2015.
More here: [IAC Announcement]
[ESA Blog]
WT1190F on November 3, in an image by Bill Ryan at Magdalena Ridge Observatory.
2015, November 4 - Next TC3 Consortium member Eileen Ryan reports that WT1190F was detected at Magdalena Ridge Observatory last night. The object was about V = 20.5 magnitude. Adding to observations by Nick Moskovitz at Lowell Observatory, using the Discovery Channel Telescope on October 27, this now is narrowing the uncertainty ellipse for the entry location.
Projected impact area for artificial object WT1190F
calculated by Bill Gray. Actual area is more uncertain than plotted here due to the nature of the object. A better location will emerge in the next orbit.
2015, October 22 - A small about 1-m sized piece of space debris, called WT1190F, was discovered on October 3 in a very wide 23-day orbit around Earth. The object will have its next perigee on October 24, then impact Earth on November 13 [ESA release]. The impact area is over the Indian ocean near Sri Lanka (see figure above). Because of its wide orbit, the object will impact Earth's atmosphere on a trajectory much like that of small natural asteroids, causing an artificial meteor at a known time and place. The nominal location is just off the coast of Sri Lanka, but the uncertainty is still significant. For observers in southern Sri Lanka, if skies are clear, it may result in a visible meteor in the daytime sky lasting a few seconds (perhaps not so easy to see), at around 11:50 a.m. local time (06:20 UT). The view will be better at altitude aboven clouds. Place and time are still uncertain. The location will be better known following the October 24 perigee. Astronomers are encouraged to observe WT1190F at the time of perigee around October 24 and provide more astrometric measurements as well as light curve data to evaluate shape and orientation of the object during entry. Ephemeris for this object in the sky is given at the Minor Planet Center" distant satellite page and this website by Bill Gray.
More information: [website by Bill Gray]; [Wikipedia]
2015, September 7 - A fireball is widely filmed from Bangkok, Thailand. Working with Matipon Tangmatitham, a student at the University of Michigan, and Saran Poshyachinda, deputy director of the National Astronomical Research Institute of Thailand, we are supporting efforts to reconstruct the firball trajectory, in the hope that this will lead to the recovery of meteorites.
2015, September 2 - Ozan Unsalan of the University of Istanbul in Turkey, and principal investigator of the Turkish Meteorite Network, informed us about a meteorite fall near the village of Saricicek (meaning "yellow flower") in Bingol province in eastern Turkey. Peter Jenniskens was invited to assist in the University of Istanbul field expedition and visited the area from September 26 to October 5. Video-recorded shadows from the fireball at Bingol University and Muss Alparslan Universty (108 km east of Bingol) were calibrated for trajectory reconstruction. The meteorite strewn field was surveyed and meteorite location and mass information collected. Local lead Nezir Ergun of Saricicek donated material for an international consortium study, which is underway. [Pictures of the field work]
2015, August 7 - Davide Farnocchia of NASA JPL executes an early warning practice during IAU General Assembly in Hawaii. Newly detected object is quickly recovered by Tim Lister in remote observations from South Africa and found not to impact Earth.
2015, July 9 - Peter Jenniskens presents the project at the first NASA Ames Planetary Defense Workshop. Jay Grinstead of NASA Ames presents a poster on the potential capabilities of US government aircraft for this project.
2015, June 6-9 - Peter Jenniskens teams with Hans Nielsen and Ned Rozell of the University of Alaska at Fairbanks to investigate the February 26, 2015, fireball. Jenniskens and Rozell conduct a field study with field guide Garreth Jones in the arctic, just south of Brooks Range.
2015, May 13 - We received our first early alert from the NASA JPL Sentry System today at 2:15 am. First tracklet had large errors and low impact probability. Case was dismissed 5.5 hours later after more observations had come in.
2015, April 13 - The case of 2012 TC4 is discussed here: close encounter on October 12, 2017, but no impact.
2015, April 7 - With permission, the Minor Planet Center (Jose Luis Galache) provides the table right, showing the asteroid close approaches to Earth. The list is updated daily. Efforts are under way to see if it is possible to provide such information less than 24 hours out.
2015, April 1 - Jenniskens presents the Next TC3 Consortium plans during a SOFIA Collogium at NASA Ames. The potential use of the SOFIA airborne infrared observatory for observing an asteroid impact is discussed. At least a week of warning time may be required.
2015, March 26 - Nick Moskovitz of Lowell Observatory, P.I. of MANOS, visited the SETI Institute and NASA Ames Research Center. Jim Albers showed him the CAMS station at Sunnyvale.
2015, March 23 - The Next TC3 Consortium will attempt to provide input data to the modeling efforts by the NASA Ames program for Planetary Defense.
2015, February 26 - An 0.51 kt impact over Alaska is under investigation. We are working with Prof. Hans Nielsen of the Geophysical Institute of the University of Alaska at Fairbanks. Reports of the event came in too late to avoid fresh snow on the ground.
Ten of the 31-person strong ATV5 team during upload, ready to deploy in a next opportunity. From left to right: Ron Dantowitz (Dexter Southfield), Fabian Zander (U. Stuttgart), Ferdinand Fahlbush (Astos), Thomas Marynowski (U. Stuttgart), Marek Kozubal (Dexter Southfield), Stefan Loehle (U. Stuttgart), Peter Jenniskens (SETI Institute), Sven Weikert (Astos), Dave Buttsworth (U. Southern Queensland), and Forrest Gasdia (Embry Riddle Aeronautical University).
2015, February 27 - Ron Dantowitz joins Peter Jenniskens and other researchers in an airborne observing campaign to study the shallow reentry of ESA's fifth and final Automated Transfer Vehicle (ATV5, Georges Lemaitre). Unfortunately, on February 3, the spacecraft develops a battery problem and has to be re-entered
immediately after undock in daytime conditions, well before the February 27 date targeted for a night-time reentry. The mission is postponed until a future opportunity to study a shallow spacecraft entry. All efforts remain a great test of observing processes and hones the team to be prepared for a next announced asteroid impact.
2015, January 25 - Effective today, Tim Spahr has resigned as director of the Minor Planet Center. SAO scenior astrophysicist Matthew Holman has been appointed as interim director. Jose Luis Galache will be our future point of contact at the Minor Planet Center.
2014, November 30 - The ATLAS project posted an update today saying they are on schedule to become online at the end of 2015. [More here]