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Contents  on 3 September '07

• Minor-Object News -- five items
• Minor-Object Science -- five papers
• IAU Minor Planet Center
  • NEOCP Activity -- six listings: 2 new, 4 updated
  • New MPECs -- one MPEC
  • Observers -- thirteen observing facilities
• Impact Risk Monitoring -- nothing to report
• 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 3 September '07

• "Chuffed by comet naming," Timaru Herald 4 Sept. - Quote: "When the first images were taken with Mt John's 1m McLellan telescope on August 22, [Alan Gilmore] routinely recorded the measurements but did not think too much of it. 'It looked just like another asteroid'... [Later] astronomers at Siding Spring in Australia and Guangzhou in China ... noticed it showed a very tiny and faint tail, confirming its cometary nature." - Note: This is comet comet P/2007 Q2 (Gilmore). See its first MPEC on August 30th with an early orbit calculation that puts it on a path from the other side of Mars out toward Saturn, passing perihelion on August 23rd. {permalink}
• "Scientists find 400 meteorites in Oman," Khaleej Times 3 Sept. - Quote: "The discoveries were made by a joint Oman-Swiss team that was on a quest for meteorites in the Sultanate ... the result of joint scientific co-operation between the Commerce and Industry Ministry's Directorate-General of Minerals, and the University of Berne of Switzerland." {permalink}
• "USU duo captures meteor data via jet," Salt Lake Tribune 3 Sept. - Quote: "Utah State University senior Dan Burton and his physics professor Mike Taylor got to see a rare [Aurigids] meteor shower from 47,000 feet this weekend. On Saturday, the two were among a 24-member, international team of scientists that took to the night sky in two privately owned jets for the NASA-sponsored Aurigid Multi-Instrument Aircraft Campaign Mission." {permalink}
  • "USU Researchers on Airborne Mission to Capture Meteor Images," Utah State Univ. 30 Aug. - Quote: "[Undergraduate] physics student Dan Burton and his mentor, physics professor Mike Taylor, are among a [team who late on Aug. 31st will] fly through the night and early morning to study the elusive remnants of a comet debris stream created some two millennia ago... Photographing shooting stars is a skill Taylor has honed on a number of NASA missions [including when] he and colleagues successfully captured video of the reentry of NASA's Stardust capsule, which 'acted like a giant meteor.'" {permalink}
• "September Is Time To Read About Hurricanes," The Day 3 Sept. - Quote: "A fire ball ... was observed and heard about 10:40 p.m. Thursday, Aug. 16 ... on the Groton side of Mystic... Sightings of this fire ball were also telephoned to me from Salem and Old Lyme." - Note: This report is from Don Treworgy, director of the Mystic Seaport planetarium. {permalink}

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Minor-Object Science  on 3 September '07

• "Observation of False Spherical Micrometeorites" by Anselmo, Attilio, abstract & PDF at arXiv.org 3 Sept. - Quote: "The work describes the results of the study of the spherical particles that can be found in the environment and that were often considered as micrometeorites. The results have demonstrated that in the most of cases these spherical particles are the results of the human activity." - Note: The author finds an "inhomogeneous" distribution of spherical particles with magnetic properties and cites not just soldering but also grinding wheels and cigarette lighters as complicating sources. {permalink}
• "Zooming into the large circumstellar disk in M 17" by Nielbock, M. with R. Chini, V.H. Hoffmeister & 3 others, abstract & PDF at arXiv.org 3 Sept. - Quote: "We want to characterise the emission in the centre of the 24 000 AU large circumstellar disk in M 17... The large M 17 disk is obviously associated with an intermediate to high-mass protostar that accretes material from the disk and expels part of it through a symmetric bipolar outflow. The protostar is embedded in circumstellar material." {permalink}
• "Evidence for Accretion in the High-resolution X-ray Spectrum of the T Tauri Star System Hen 3-600" by Huenemoerder, David P. with Joel H. Kastner, Paola Testa & 2 others, abstract & PDF at arXiv.org 3 Sept. - Quote: "All of the signatures of Hen 3-600 that are potential diagnostics of accretion activity -- X-ray emission, UV excess, H-alpha emission, and weak infrared excess -- suggest that its components represent a transition phase between rapidly accreting, classical T Tauri stars and non-accreting, weak-lined T Tauri stars." {permalink}
• "VLBA determination of the distance to nearby star-forming regions II. Hubble 4 and HDE 283572 in Taurus" by Torres, Rosa M. with Laurent Loinard, Amy J. Mioduszewski & Luis F. Rodriguez, abstract & PDF at arXiv.org 3 Sept. - Quote: "[We] estimate the mean distance to the Taurus association to be 137 pc with a dispersion (most probably reflecting the depth of the complex) of about 20 pc." {permalink}
• "Ambipolar Diffusion in Molecular Cloud Cores and the Gravomagneto Catastrophe" by Adams, Fred C. with Frank H. Shu, abstract & PDF at arXiv.org 3 Sept. - Quote: "This paper re-examines the problem of ambipolar diffusion as a mechanism for the production and runaway evolution of centrally condensed molecular cloud cores, a process that has been termed the gravomagneto catastrophe... In conjunction with previous work showing that ambipolar diffusion takes place more quickly in the presence of turbulent fluctuations... the resultant theory provides a viable working hypothesis for the formation of isolated molecular-cloud cores and their subsequent collapse to form stars and planetary systems." {permalink}

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NEOCP Activity  on 3 September '07

The MPC's NEO Confirmation Page has 6 listings: 2 new, 4 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new and four updated listings. Of these, two were "one nighters."

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

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New MPECs  on 3 September '07

Minor Planet Electronic Circulars

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

<< DOU on 3 Sept. '07 >>  MPEC 2007-R06 - "06:07 UT" - Daily Orbit Update

• Observations of small asteroids (H>22.0)
• K07P08D   2007 PD8 (arc=13 days, H=22.5 ~107m) from the Siding Spring Survey (SSS) (Aug. 21.75p1 & 23.66p2)
• K07J16G   2007 JG16 (arc=114 days, H=23.6 ~65m) from Astronomical Research Obs. (ARO) (Sept. 2.25-28p3 at V=22.1-3)
• K02RD7P   2002 RP137 (arc=2 opp, H=23.0 ~85m) from Saint-Barthelemy Obs. (Sept. 2.88-89p5)
• Observations of other objects
• K07Q03E   2007 QE3 (arc=11 days, H=19.9 ~355m) from Greiner Research Obs. (Sept. 2.17-18p8)
• K07Q02K   2007 QK2 (arc=12 days, H=20.6 ~257m) from Lumezzane Obs. (Sept. 1.88-89p2), Greiner Research Obs. (Sept. 2.13-14p10), and Petit Jean Mtn. South Obs. (PJMSO) (Sept. 2.23-24p7)
• K07Q02A   2007 QA2 (arc=16 days, H=20.8 ~234m) from PJMSO (Sept. 2.27-29p6)
• K07P11U   2007 PU11 (Q=4.384 AU, arc=3 opp, H=16.3 ~1.86 km) from Castelmartini Obs. (Sept. 1.98-99p3)
• K07P08E   2007 PE8 (arc=111 days, H=19.4 ~446m) from Castelmartini Obs. (Sept. 1.87p3), Santa Mama Obs. (Sept. 1.96-97p6), and PJMSO (Sept. 2.26p7)
• K07O00Y   2007 OY (arc=44 days, H=20.9 ~224m) from SSS (Aug. 23.70-71p2) and ANU 1m - Sarneczky? via Australian Natl. Univ. 1m telescope (Aug. 31.64-66p6)
• K07N04S   2007 NS4 (arc=39 days, H=19.0 ~537m) from SSS (Aug. 23.39-40p2)
• K07M24C   2007 MC24 (arc=68 days, H=19.5 ~426m) from ANU 1m - Sarneczky? (Aug. 31.66-68p4)
• K07L32R   2007 LR32 (arc=100 days, H=17.2 ~1.23 km) from PJMSO (Sept. 2.30-31p6) and Eschenberg Obs. (Sept. 2.78-79p7)
• K07L00V   2007 LV (arc=2 opp, H=18.1 ~812m) from Shenton Park Obs. (Sept. 2.65-67p2)
• K07H15E   2007 HE15 (arc=133 days, H=19.5 ~426m) from ARO (Sept. 2.27-28p4)
• K07D83B   2007 DB83 (arc=3 opp, H=18.3 ~741m) from New Millennium Obs. (April 17.84-87p3)
• K05S00G   2005 SG (arc=4 opp, H=19.0 ~537m) from ANU 1m - Sarneczky? (Sept. 1.78-79p3)
• K04O11T   2004 OT11 (arc=3 opp, H=17.3 ~1.17 km) from Schiaparelli Obs. (Sept. 1.88-89p3)
• K04K01E   2004 KE1 (arc=2 opp, H=21.6 ~162m) from Shenton Park Obs. (Sept. 2.74p2)
• K03H32Q   2003 HQ32 (arc=4 opp, H=18.1 ~812m) from ARO (Sept. 2.31-34p3 at V=22.2)
• K02N04N   2002 NN4 (arc=4 opp, H=20.0 ~339m) from Santa Mama Obs. (Sept. 1.85-88p9) and PJMSO (Sept. 2.21-22p6)
• J99J03U   1999 JU3 (arc=4 opp, H=19.3 ~467m) from Eschenberg Obs. (Sept. 2.80p3)
• J96F03O   1996 FO3 (arc=3 opp, H=20.5 ~269m) from ARO (Sept. 2.29-33p3 at V=22.5-6)
• F4453   154453 2003 CJ11 from New Millennium Obs. (April 16.85p1 & 17.85-88p3)
• F4330   154330 2002 VX94 from ARO (Sept. 2.29-30p3)
• F4007   154007 2002 BY from New Millennium Obs. (April 17.84p1)
• E5656   145656 4788 P-L from PJMSO (Sept. 2.19-21p5)
• D8883   138883 2000 YL29 from New Millennium Obs. (April 17.85-88p2)
• 86324   86324 1999 WA2 from PJMSO (Sept. 2.18-19p5)
• 86039   86039 1999 NC43 from New Millennium Obs. (April 16.82-84p2 & 17.82-87p4)
• 53426   53426 1999 SL5 from Lumezzane Obs. (Sept. 1.87p4)
• 31669   31669 1999 JT6 from ANU 1m - Sarneczky? (Sept. 1.65-66p3)
• 04544   4544 Xanthus (1989 FB) from New Millennium Obs. (April 16.83p1, 16.87p1 & 17.83-87p4)
• 04257   4257 Ubasti (1987 QA) from New Millennium Obs. (April 18.05-09p4)

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Observers  on 3 September '07

Thirteen observing facilities appear in today's MPEC.

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Impact Risk Monitoring  on 3 September '07

At last check (NEODyS and JPL at 2354 UTC) there was no risk monitoring news to report yet today. See the CRT for activity in the last month.

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Chronology  on 3 September '07

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