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Contents  on 10 August '07

• Minor-Object News -- twelve items
• Minor-Object Science -- two papers
• IAU Minor Planet Center
  • NEOCP Activity -- seven listings: 5 new, 2 updated
  • New MPECs -- ten MPECs
  • Observers -- 53 observing facilities
• Impact Risk Monitoring -- one object reported
• Chronology

Resources:

• Consolidated Risk Tables - CRT page
• Ephemerides for risk-rated objects
• Ephemerides for small asteroids

The latest news: framed access (best), RSS news feed (flags updates), or redirection - Note: A/CC has a main Web site and a backup site.

Navigation tips: Use the << and >> arrows on the menus for each regular section (Observers, Risks, etc.) to move to the previous and next day's news for that section. Use the Index menu item to access specific days this year through a calendar interface. And use the all-up news archive to access news from any time since A/CC began in early 2002. To keep track of what's new each day, watch the Chronology section.

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Minor-Object News  on 10 August '07

• Bits & pieces: Today is the 35th anniversary of the 1972 Great Daylight Fireball, which may be the closest asteroid flyby ever observed. It was calculated from military satellite data to have passed 58 miles (93 km.) above a point in Montana. A movie of the event can be seen on YouTube, an image is here at Randolph College, and another image and a map of the south-to-north path can be found at the bottom of a 2000 article in the Aerospace Corporation's Crosslink magazine. (A great account of the event written by Gary Kronk is apparently no longer available on the Web.)
        Spacewatch is back on watch, with observing work reported in today's DOU MPEC from yesterday morning, the first since early on July 4th and since the wildfire that threatened Kitt Peak.
        Lykawka and Mukai's science paper, "Resonance sticking in the scattered disk," which was noted by A/CC on July 31st, was reposted today revised at arXiv.org. {permalink}
• "Meteor crash rocks southwestern Hungary," All Hungary News at Caboodle.hu 10 Aug. - Quote: "The southern Transdanubia area of Hungary ... was shaken by the sound of an explosion Sunday afternoon when a melon-sized meteor apparently hit the ground in Bonyhad. Astronomers are analyzing the impact crater, which is two meters deep and seven meters in diameter." - Note: The original article in Hungarian at FN.hu includes a picture of the crater. {permalink}
• "August 9, 2007 Fireball," Cloudbait Observatory 9 Aug. - Quote: "This fireball occurred at 3:43 AM MDT over northeast Colorado... bright enough to light up the overhead clouds... [It] does not appear to be related [to the Perseid meteor shower]." - Note: Cloudbait's home page also has a running collection of lesser fireballs recorded for the past week and, as of today, shows 19 recordings of about nine other events from two all-sky camera sites in central Colorado. Eyewitness accounts are requested. {permalink}
• "Mystery object falls from sky, startles residents," Arizona Republic 9 Aug. - Quote: "Stanley Fosha is looking for what woke him early Wednesday morning with a giant flash of white light and a thunderous boom ... around 2:15 a.m. ... in Scottsdale." {permalink}
• "Double-nosed dog not to be sniffed at," BBC News 10 Aug. - Quote: "The Scientific Exploration Society was in Bolivia to investigate a shallow crater about five miles in width. According to Colonel Blashford-Snell, he has now found evidence that this was caused by a giant meteorite, which struck the Bolivian Amazon Basin up to 30,000 years ago." - Note: You can catch up on this nearly completed expedition at Kota Mama VI Field Report, with the most recent posting four days ago. From July 22nd, after some very difficult slogging, it is stated that "British geologist, James Bryce, and the Bolivian geologists report that the gravimeter (an instrument which shows sub-surface structures) and field surveys were all accomplished and both rock and soil samples were obtained. The results will be analysed at the School of Ocean and Earth Science, Southampton University and at Sergeotecmin in La Paz. This could take up to 6 months, after which it should be possible to state definitely if this is a meteorite crater." {permalink}
• "Meteor Radar," SpaceWeather.com 10 Aug. - Quote: "The University of Western Ontario operates a 17-38 MHz meteor orbit radar [CMOR]. Pictured [here] is their sky map of activity on August 8th [when] the radiant of the Southern Delta Aquarid meteor shower (a relatively minor shower caused by an unknown comet) was actually more active than the Perseids." - Note: SpaceWeather.com has posted a 2007 Perseids gallery that includes a neat Perseids firefly image. {permalink}
  • "'Nature's fireworks' to fill the night sky," Auburn Journal 10 Aug. - Quote: "If staying up all night Sunday isn't your cup of decaf herbal tea, don't stress. [Don Machholz] said the show is still pretty impressive right after the sun sets Sunday." {permalink}
  • "Stargazers set sights on meteors," BBC News 10 Aug. - Quote: "Both hemispheres will receive good views [of the Perseids] but the prime locations will be Western Europe and North America." {permalink}
• Inframatics: The June edition (733Kb PDF) of this quarterly newsletter on low-frequency atmospheric acoustics (infrasound) was posted yesterday or this morning. No meteor events are reported. {permalink}
• "NASA Ames Presentation by Scott Sanford on Stardust Spacecraft," SpaceRef.com 10 Aug. - Quote: "Dr. Scott Sandford presented a Director's Colloquium about samples returned to Earth from a comet named Wild 2 by the Stardust spacecraft. The informative presentation was especially unique because the audience got the chance to wear 3D glasses and view the comet in 3D." - Note: This item links to transcripts of the March presentation in three parts, each with its own link to MP3 audio. {permalink}
• "Ambassador to the Asteroids," LiveScience.com 10 Aug. - Quote: "The first [NEO] workshop was held last May in Strasbourg, France. Next month a workshop will be held in Sibiu, Romania, followed by an April 2008 confab tentatively set for Guanacaste, Costa Rica, and a fourth workshop to be held possibly in September 2008, perhaps in the United States." {permalink}
• "Three-tonne meteorite stolen in Russia," AFP at France 24 10 Aug. - Quote: "The giant rock was stolen from the yard of the Tunguska Space Event foundation, whose director said it was the part of meteor that caused a massive explosion in Siberia in 1908... Foundation director Yury Lavbin ... claimed [in 2004] to have discovered the wreckage of an alien spacecraft during the expedition." - Note: No remnant of the object that caused the Tunguska event has ever been identified. {permalink}

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Minor-Object Science  on 10 August '07

• "Optical Spectroscopic Classification and Membership of Young M Dwarfs in Star-Forming Regions" by Riddick, F.C. with P.F. Roche & P.W. Lucas, abstract & PDF at arXiv.org 10 Aug. - Quote: "The spectral type is a key parameter in calibrating the temperature which is required to estimate the mass of young stars and brown dwarfs. We describe an approach developed to classify low-mass stars and brown dwarfs in the Trapezium Cluster using red optical spectra, which can be applied to other star-forming regions. The classification uses two methods for greater accuracy: the use of narrowband spectral indices which rely on the variation of the strength of molecular lines with spectral type and a comparison with other previously classified young, low-mass objects in the Chamaeleon I star-forming region... A sodium spectral index is used to estimate the surface gravity and to demonstrate quantitatively the difference between young (1-2Myr) objects, and dwarf and giant field stars." {permalink}
• "An optical spectroscopic H-R diagram for low-mass stars and brown dwarfs in Orion" by Riddick, F.C. with P.F. Roche & P.W. Lucas, abstract & PDF at arXiv.org 10 Aug. - Quote: "The masses and temperatures of young low mass stars and brown dwarfs in star-forming regions are not yet well established because of uncertainties in the age of individual objects and the spectral type vs. temperature scale appropriate for objects with ages of only a few Myr. Using multi-object optical spectroscopy, 45 low-mass stars and brown dwarfs in the Trapezium Cluster in Orion have been classified and 44 of these confirmed as bona fide cluster members. The spectral types obtained have been converted to effective temperatures using a temperature scale intermediate between those of dwarfs and giants, which is suitable for young pre-main sequence objects. The objects have been placed on an H-R diagram overlaid with theoretical isochrones." {permalink}

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NEOCP Activity  on 10 August '07

The MPC's NEO Confirmation Page has 7 listings: 5 new, 2 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had five new and two updated listings. All of these were "one nighters." So far Major News has counted a total of eleven objects listed on the NEOCP at some point today.

To learn how observers use the NEOCP, see Suno Observatory's Practical guide on how to observe NEOCP object.

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New MPECs  on 10 August '07

Minor Planet Electronic Circulars

As of last check at 2354 UTC, there have been ten MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

• MPEC 2007-P24 time-stamped "05:35 UT" - 2007 PF6 - see below
• MPEC 2007-P25 time-stamped "06:08 UT" - Daily Orbit Update - see below
• MPEC 2007-P26 time-stamped "16:41 UT" - 2007 PP6 - see below
• MPEC 2007-P27 time-stamped "18:55 UT" - Comet C/2006 U6 (Spacewatch) - see below
• MPEC 2007-P28 time-stamped "19:34 UT" - Comet C/2007 K6 (McNaught) - see below
• MPEC 2007-P29 time-stamped "19:41 UT" - Comet C/2007 M1 (McNaught) - see below
• MPEC 2007-P30 time-stamped "19:45 UT" - Comet C/2007 M3 (LINEAR) - see below
• MPEC 2007-P31 time-stamped "19:53 UT" - Comet P/2007 N1 (McNaught) - see below
• MPEC 2007-P32 time-stamped "19:57 UT" - Comet C/2007 N3 (Lulin) - see below
• MPEC 2007-P33 time-stamped "20:08 UT" - Observations of Comets

MPEC 2007-P33 - "20:08 UT" - Observations of Comets

• PK07H030   P/2007 H3 (Garradd) from Kambah Obs. (July 22.47p2) and Mt. John Obs. (Aug. 7.33p3)
• PK07H010   P/2007 H1 (McNaught) from Smolyan Obs. (July 18.98-00p4, 20.02-03p3 & 23.99-02p7), Ageo Obs. (July 31.70p2), Vitebsk Obs. (Aug. 4.95-96p2 & 9.93-94p3), Gualba Obs. (Aug. 5.01p1), Masquefa Obs. (Aug. 5.05-06p3), Carmelita Obs. (Aug. 5.08-09p3), LINEAR (Aug. 8.33-37p4), Montcabre Obs. (Aug. 9.03-04p2), Atlante Obs. (Aug. 9.10-13p5), CAST Obs. (Aug. 9.98p1), Rodeno Obs. (Aug. 9.99-00p3), Mallorca Obs. (Aug. 10.02p2), and Monte Deva Obs. (Aug. 10.02-04p5)
• CK07O010   C/2007 O1 (LINEAR) from Cordell-Lorenz Obs. (Aug. 3.24-25p3), Kiev Comet Station (Aug. 3.85-87p5), Suno Obs. (Aug. 4.97-98p3), San Marcello Pistoiese Obs. (Aug. 5.83-88p3), Buchloe Obs. (Aug. 5.87p3), and Great Shefford Obs. (Aug. 6.92-93p3)
• CK07K040   C/2007 K4 (Gibbs) from Schiaparelli Obs. (July 4.95p1) and Mt. John Obs. (Aug. 6.38-40p4)
• CK07K010   C/2007 K1 (Lemmon) from Table Mtn. Obs. (July 21.25-28p4) and Schiaparelli Obs. (Aug. 4.04p1 & 4.08p1)
• CK07G010   C/2007 G1 (LINEAR) from Smolyan Obs. (July 18.91-93p4, 19.95-96p5 & 23.87-88p4), Rodeno Obs. (Aug. 3.86-88p3, 4.88-90p3, 6.88-90p3 & 9.95-97p3), Szamotuly-Galowo Obs. (Aug. 3.92p2), Vicksburg Obs. (Aug. 4.13-14p2 & 6.12-13p2), Ageo Obs. (Aug. 4.53p2), CAST Obs. (Aug. 4.84p1), New Millennium Obs. (Aug. 4.86-94p11 & 6.87-92p7), Monte Deva Obs. (Aug. 4.87-89p5 & 8.94-95p3), Masquefa Obs. (Aug. 4.89-90p3 & 6.88-89p3), Vitebsk Obs. (Aug. 4.89-91p5), Gualba Obs. (Aug. 5.88-89p2), Modra Obs. (Aug. 5.88-89p2), and Posadas Obs. (Aug. 8.95-98p3)
• CK06V13Z   C/2006 VZ13 (LINEAR) from CAST Obs. (July 22.84p1, 24.86p1 & Aug. 1.84p1), Vega del Thader Obs. (July 26.86-87p15), Ageo Obs. (July 28.46p3), Chante-Perdrix Obs. (Aug. 3.84-85p3), Rodeno Obs. (Aug. 3.85-86p3 & 4.84-86p3), Schiaparelli Obs. (Aug. 4.85-87p2), and Buchloe Obs. (Aug. 5.84p3)
• CK06O02F   C/2006 OF2 (Broughton) from Smolyan Obs. (July 18.94-96p5, 19.97-99p4 & 23.94-97p7), Kiev Comet Station (Aug. 3.90-92p5), Rodeno Obs. (Aug. 3.92-94p3 & 10.01-02p3), Masquefa Obs. (Aug. 4.03-04p3), Schiaparelli Obs. (Aug. 4.11p1), Reedy Creek Obs. (Aug. 4.67p4), Monte Deva Obs. (Aug. 4.96-98p5, 9.02-03p5 & 9.95-97p5), Mt. Cabreja Obs. (Aug. 5.00-02p2), Gualba Obs. (Aug. 5.03-05p4), Carmelita Obs. (Aug. 5.04p3), LINEAR (Aug. 5.27-31p4), Nazaret Obs. (Aug. 5.97-99p3), Atlante Obs. (Aug. 6.00-02p5), Posadas Obs. (Aug. 6.00-02p3), Montcabre Obs. (Aug. 8.95p3), CAST Obs. (Aug. 9.93p1), and Linceo Obs. (Aug. 9.97-98p3)
• CK06M040   C/2006 M4 (SWAN) from Buchloe Obs. (July 14.02p2), North Ryde Obs. (Aug. 3.65-67p2), and Mt. John Obs. (Aug. 6.61-62p3)
• CK06K040   C/2006 K4 (NEAT) from El Leoncito Obs. (Aug. 5.12-15p5), Kambah Obs. (Aug. 6.55p2), Mt. John Obs. (Aug. 7.50p3), and North Ryde Obs. (Aug. 7.56-58p2, 8.40p1 & 10.40-42p2)
• CK05Y00W   C/2005 YW (LINEAR) from Mt. John Obs. (Aug. 6.44p3) and North Ryde Obs. (Aug. 7.44p1 & 10.46-48p2)
• CK05S040   C/2005 S4 (McNaught) from New Millennium Obs. (Aug. 4.97p1), Schiaparelli Obs. (Aug. 5.02p1), Gualba Obs. (Aug. 5.92p1), and Montana Blanca Obs. (Aug. 7.99p1)
• CK05L030   C/2005 L3 (McNaught) from Smolyan Obs. (July 18.88-90p6, 19.92-93p4 & 23.83-86p5), Remanzacco Obs. (July 26.88p1 & Aug. 6.86p2), Vega del Thader Obs. (July 26.89p11), Ageo Obs. (July 28.59-60p2), Rodeno Obs. (Aug. 3.88-90p3, 6.85-87p3 & 9.92-93p3), Szamotuly-Galowo Obs. (Aug. 3.91p2 & 4.86p3), Posadas Obs. (Aug. 3.92-94p3 & 6.92-94p3), Schiaparelli Obs. (Aug. 4.00-03p2), Vicksburg Obs. (Aug. 4.11-12p2 & 6.15-17p2), Masquefa Obs. (Aug. 4.83-84p3), New Millennium Obs. (Aug. 4.86-93p10 & 6.87-93p7), El Leoncito Obs. (Aug. 4.98-02p5), Mt. Cabreja Obs. (Aug. 4.99-01p2), Calarreona Obs. (Aug. 5.85p3), Buchloe Obs. (Aug. 5.87-88p3), Gualba Obs. (Aug. 5.90p2), Mt. John Obs. (Aug. 7.39-40p3), Hamamatsu-Yuto Obs. (Aug. 7.48-50p5), and Vitebsk Obs. (Aug. 9.89-90p2)
• CK05K010   C/2005 K1 (Skiff) from Mt. John Obs. (June 10.72-73p3 & Aug. 6.55-58p2)
• CK05B010   C/2005 B1 (Christensen) from LINEAR (Aug. 8.35-38p3 & 9.38-43p5)
• CK03W42T   C/2003 WT42 (LINEAR) from Buchloe Obs. (July 13.92-93p3) and Schiaparelli Obs. (Aug. 4.86-88p2)
• 0189   189P/NEAT from Vitebsk Obs. (Aug. 2.86-87p4, 4.92-93p8, 7.89-90p9 & 9.91-92p4), Homburg-Erbach Obs. (Aug. 3.87-89p3), Ageo Obs. (Aug. 4.57-58p3), Szamotuly-Galowo Obs. (Aug. 4.85p3), Masquefa Obs. (Aug. 4.86-87p3), Montcabre Obs. (Aug. 5.86p3 & 9.91p3), Buchloe Obs. (Aug. 5.86p3), Nazaret Obs. (Aug. 5.89-94p3), Gualba Obs. (Aug. 5.90-91p2), Modra Obs. (Aug. 6.84p4), New Millennium Obs. (Aug. 6.92p2), Cordell-Lorenz Obs. (Aug. 8.20-23p2, 9.22p1, 9.27p1, 9.32p1 & 10.20-24p2), and Carmelita Obs. (Aug. 9.85p3)
• 0136   136P/Mueller 3 from LINEAR (Aug. 8.28-33p4 & 9.38-43p3)
• 0093   93P/Lovas 1 from Vitebsk Obs. (Aug. 7.95-96p4), CAST Obs. (Aug. 9.96p1), and Monte Deva Obs. (Aug. 9.99-01p5)
• 0050   50P/Arend from Szamotuly-Galowo Obs. (Aug. 9.06-07p2), CAST Obs. (Aug. 10.00p1), and Monte Deva Obs. (Aug. 10.04-06p4)
• 0029   29P/Schwassmann-Wachmann 1 from Gualba Obs. (July 28.12p3) and Masquefa Obs. (Aug. 5.11-13p3)
• 0017   17P/Holmes from Atlante Obs. (Aug. 3.15-18p3) and Szamotuly-Galowo Obs. (Aug. 9.05p3)
• 0008   8P/Tuttle from Remanzacco Obs. (Aug. 1.02p1), Vitebsk Obs. (Aug. 2.94p4), and Ageo Obs. (Aug. 4.70p2)
• 0002   2P/Encke from North Ryde Obs. (Aug. 4.44-46p2, 5.44p1 & 8.55p1), the Siding Spring Survey (SSS) (Aug. 4.54-56p4), and Masquefa Obs. (Aug. 4.96-98p3)

MPEC 2007-P32 - "19:57 UT" - Comet C/2007 N3 (Lulin)

• CK07N030   C/2007 N3 (Lulin) from Geisei Obs. (July 23.67p1), Masquefa Obs. (Aug. 4.07-12p3), Kiev Comet Station (Aug. 4.89-94p3), Schiaparelli Obs. (Aug. 5.03p1 & 5.12p1), Suno Obs. (Aug. 5.06-08p2), KLENOT (Aug. 5.90p6), Taunus Obs. (Aug. 5.96-00p4), Montcabre Obs. (Aug. 8.99-00p3), LINEAR (Aug. 9.22-27p5), and Cordell-Lorenz Obs. (Aug. 9.26-31p4, 10.18-20p2 & 10.29-32p2)

MPEC 2007-P31 - "19:53 UT" - Comet P/2007 N1 (McNaught)

• PK07N010   P/2007 N1 (McNaught) (q=2.046 AU, Q=4.974 AU, TP=2007 Sept. 13.3154 TT) from Kiev Comet Station (Aug. 6.03-04p4), Cordell-Lorenz Obs. (Aug. 8.40-41p2 & 10.39-41p2), and North Ryde Obs. (Aug. 10.69-70p2)

MPEC 2007-P30 - "19:45 UT" - Comet C/2007 M3 (LINEAR)

• CK07M030   C/2007 M3 (LINEAR) (i=161.8°, q=3.468 AU, Q=316.134 AU, TP=2007 Sept. 4.7610 TT) from Remanzacco Obs. (July 26.86p1), Vega del Thader Obs. (July 26.90-91p9), Kiev Comet Station (Aug. 3.82-84p8), Szamotuly-Galowo Obs. (Aug. 3.91p2), Schiaparelli Obs. (Aug. 4.01-05p2), El Leoncito Obs. (Aug. 4.10-11p2 & 5.03-06p5), Masquefa Obs. (Aug. 4.91-94p3), Suno Obs. (Aug. 4.93-95p3), Montcabre Obs. (Aug. 5.88-89p3), Vicksburg Obs. (Aug. 6.18-19p2), New Millennium Obs. (Aug. 6.88-94p8), Posadas Obs. (Aug. 6.96-97p3), Mt. John Obs. (Aug. 7.41-42p4), Cordell-Lorenz Obs. (Aug. 8.18-21p2), and RAS Obs. Mayhill (Aug. 8.30-31p2)

MPEC 2007-P29 - "19:41 UT" - Comet C/2007 M1 (McNaught)

• CK07M010   C/2007 M1 (McNaught) (i=139.7°, q=7.473 AU, TP=2008 Aug. 11.5327 TT) from Schiaparelli Obs. (Aug. 4.00p1), Suno Obs. (Aug. 4.00-02p2), Kiev Comet Station (Aug. 5.82p2), and Modra Obs. (Aug. 5.91-92p2 & 7.92-93p2)

MPEC 2007-P28 - "19:34 UT" - Comet C/2007 K6 (McNaught)

• CK07K060   C/2007 K6 (McNaught) (i=105.1°, q=3.433 AU, Q=443.756 AU, TP=2007 July 1.46699 TT) from North Ryde Obs. (Aug. 4.48-53p3), Mt. John Obs. (Aug. 6.53p3), and Kambah Obs. (Aug. 6.65-66p2)

MPEC 2007-P27 - "18:55 UT" - Comet C/2006 U6 (Spacewatch)

• CK06U060   C/2006 U6 (Spacewatch) (i=84.9°, q=2.498 AU, Q=4000.586 AU, TP=2008 June 5.47776 TT) from SSS (June 15.77p1), Smolyan Obs. (July 19.05-06p3), and LINEAR (Aug. 5.38-43p5)

MPEC 2007-P26 - "16:41 UT" - 2007 PP6

• K07P06P   2007 PP6 (q=0.321 AU, H=16.9 ~1.41 km) was discovered at 1515 UT 09 Aug. by SSS, which observed it at Aug. 9.64-77p10 and 10.49-53p4.

<< DOU on 10 Aug. '07 >>  MPEC 2007-P25 - "06:08 UT" - Daily Orbit Update

• Observations of small asteroids (H>22.0)
• K07O03H   2007 OH3 (arc=19 days, H=24.5 ~43m) from Astronomical Research Obs. (ARO) (Aug. 7.28-30p2)
• Observations of other objects
• K07P00Q   2007 PQ (arc=5 days, H=20.6 ~257m) from SSS (Aug. 9.43-45p3)
• K07O00Y   2007 OY (arc=22 days, H=20.8 ~234m) from SSS (Aug. 9.70-75p3)
• K07M24L   2007 ML24 (arc=36 days, H=19.2 ~490m) from David Tholen's team on Mauna Kea (July 27.62p3)
• K07M24C   2007 MC24 (arc=41 days, H=19.5 ~426m) from North Ryde Obs. (Aug. 4.57p1)
• K07L32R   2007 LR32 (arc=76 days, H=17.2 ~1.23 km) from New Millennium Obs. (Aug. 7.03-06p4), Atlante Obs. (Aug. 9.01p1 & 9.06p1), and Capannoli Obs. (Aug. 9.92-93p2)
• K07L19V   2007 LV19 (arc=55 days, H=19.9 ~355m) from ARO (Aug. 9.13-16p3)
• K07L15A   2007 LA15 (arc=56 days, H=19.5 ~426m) from El Leoncito Obs. (Aug. 4.00-02p3)
• K07L00S   2007 LS (Q=4.532 AU, arc=62 days, H=17.7 ~977m) from ARO (Aug. 9.09-11p3)
• K07H70D   2007 HD70 (arc=105 days, H=21.0 ~214m) from ARO (Aug. 8.19-20p3)
• K07G05Z   2007 GZ5 (arc=116 days, H=21.2 ~195m) from ARO (Aug. 9.09-10p3)
• K07F42V   2007 FV42 (arc=138 days, H=17.9 ~891m) from El Leoncito Obs. (Aug. 5.23-25p3)
• K07F01K   2007 FK1 (arc=145 days, H=20.2 ~309m) from ARO (Aug. 9.23-24p3)
• K07F01E   2007 FE1 (arc=143 days, H=18.8 ~589m) from El Leoncito Obs. (Aug. 7.14-16p3)
• K07DA3T   2007 DT103 (arc=164 days, H=19.1 ~513m) from Moletai Obs. (April 12.86p1), Atlante Obs. (Aug. 9.08-12p3), and LINEAR (Aug. 9.28-32p5)
• K07C26K   2007 CK26 (arc=2 opp, H=19.0 ~537m) from New Millennium Obs. (Aug. 6.95-96p2 & 7.01p1)
• K05G00G   2005 GG (arc=3 opp, H=16.0 ~2.14 km, q=0.694 AU) from SSS (Aug. 9.51-54p4)
• K04B11E   2004 BE11 (arc=2 opp, H=19.4 ~446m) from LINEAR (Aug. 9.33-37p5)
• K03B43B   2003 BB43 (i=40.9°, arc=3 opp, H=17.0 ~1.35 km) from LINEAR (Aug. 9.28-32p3)
• K00W06G   2000 WG6 (arc=4 opp, H=17.5 ~1.07 km) from SSS (Aug. 9.47-51p4)
• K00Q07T   2000 QT7 (arc=2 opp, H=20.0 ~339m) from LINEAR (Aug. 9.38-43p5)
• J98S36H   1998 SH36 (arc=4 opp, H=20.5 ~269m) from ARO (Aug. 9.26-30p3 at V=22.1)
• J96R03G   1996 RG3 (arc=3 opp, H=18.5 ~676m) from the Spacewatch 1.8m telescope (Aug. 9.25-26p3)
• J88P00A   1988 PA (arc=3 opp, H=17.4 ~1.12 km) from LINEAR (Aug. 9.39-43p4)
• F9495   159495 2000 UV16 from El Leoncito Obs. (Aug. 3.98-00p3 & 6.98-00p3)
• E1874   141874 2002 PO34 from LINEAR (Aug. 9.22-26p4)
• E0158   140158 2001 SX169 from LINEAR (Aug. 9.16-21p4)
• 87309   87309 2000 QP from Atlante Obs. (Aug. 8.90p1 & 8.98p1)
• 66959   66959 1999 XO35 from North Ryde Obs. (Aug. 4.38-40p2)
• 21277   21277 1996 TO5 from Atlante Obs. (Aug. 8.92p1 & 9.03p1)
• 18882   18882 1999 YN4 from El Leoncito Obs. (Aug. 7.11-12p3)
• 16636   16636 1993 QP from El Leoncito Obs. (Aug. 5.20-22p3) and Atlante Obs. (Aug. 8.96-99p2)
• 07350   7350 1993 VA from LINEAR (Aug. 9.21-26p5)
• 05324   5324 Lyapunov (1987 SL) from SSS (Aug. 9.36-38p4)
• 04197   4197 1982 TA from SSS (Aug. 9.37-39p4)
• 02100   2100 Ra-Shalom (1978 RA) from LINEAR (Aug. 9.40-43p4)
• 01685   1685 Toro (1948 OA) from El Leoncito Obs. (Aug. 3.96-97p3 & 6.96-97p3)

MPEC 2007-P24 - "05:35 UT" - 2007 PF6

• K07P06F   2007 PF6 (risk-listed, H=20.3 ~295m) was discovered at 0501 UT 08 Aug. by LINEAR, which observed it at Aug. 8.21-25p4 and 9.27-31p5. The discovery was confirmed by Jim Young via Table Mtn. Obs. (Aug. 9.28-30p4), Vallemare di Borbona Obs. (Aug. 9.88-89p4), and La Canada Obs. (Aug. 9.95-96p3).

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Observers  on 10 August '07

A total of 53 observing facilities appear in today's MPECs.

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Impact Risk Monitoring  on 10 August '07

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from an orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" for more about this.

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Chronology  on 10 August '07

Times are UTC for when the items were noted or added by Major News.