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Contents  on 1 September '07

• Minor-Object News -- seven items
• Minor-Object Science -- one paper
• IAU Minor Planet Center
  • NEOCP Activity
  • New MPECs -- four MPECs
  • Observers -- eleven 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 1 September '07

• "First Impressions," SETI Inst. 1 Sept. - Quote: "The 2007 Aurigid shower was a spectacular display ... onboard the NASA sponsored Aurigid MAC mission. The two Gulfstream GV aircraft ... travelled from Utah towards California and on to the Pacific Ocean. Results from our near-real time flux counts indicate that the shower peaked around 04:10-04:15 PDT (11:10-11:15 UT)... The shower lasted at least two hours, from about 3:15 to 5:15 PDT, but may have started earlier and was still ongoing at 6 PDT." {permalink}
  • "2007 Aurigids," SpaceWeather.com 1 Sept. - Note: Growing image gallery. {permalink}
  • "2007 Aurigid Shower," Cloudbait Observatory 1 Sept. - Quote: "This is a composite image of 49 meteors collected between sunset on August 31 through sunrise on September 1. Nearly all the events happened between 04:45 and 05:45 MDT." - Note: Also a video and a frequency chart. {permalink}
  • "Alpha-Aurigids 2007," IMO 1 Sept. - Note: This page has been updating and will continue to update as more reports come in. {permalink}
• Bits & pieces: Ten KBO discoveries, made from 2003 to 2005 and announced in two MPECs today (see below), are coded to JPL's NEAT program with its Mt. Palomar telescope, but are the work of Mike Brown, Chad Trujillo and David Rabinowitz. (Four objects with temporary target designations are included in a table in a paper Brown posted yesterday -- see below, footnoted as "discovered in the All-Sky Caltech Survey" and in process to receive MPC designations.) Also not credited by program code is whoever found 2007 KN4 in NEAT's Mt. Palomar observations from October 2001 published in today's DOU MPEC.
        The Planetary Exploration Newsletter (PEN) in an edition yesterday carried an announcement of "a new website for research and analysis news" at NASA Science Mission Directorate.
        Some follow-ups to note: Cloudbait Observatory updated its August 19th Colorado fireball report on the 22nd, obtaining a path calculation but still concluding that there were probably no resulting meteorites. Part two of NASA Astrobiology Magazine's article on "Are Planetary Systems Filled to Capacity?" was published August 20th. It tells how a protoplanetary disk, in progressing from dust to planetesimals to planetary embryos, "remains dynamically well behaved" until the embryos have swept up most of the disk's mass, and then "all hell breaks loose." {permalink}
• "Meteorite doorstop excites Western Canadian scientists," CBC News 31 Aug. - Quote: "The rock from space was discovered in 1999 in a field west of Davidson." - Note: See a link to more info yesterday. {permalink}
• "Cosmic Cockroaches," Science@NASA 31 Aug. - Quote: "Astronomers have long known that PAHs are abundant not only on Earth but throughout the cosmos -- they've been found in comet dust, meteorites and many cold interstellar clouds -- but who knew they were so tough? "This is our first evidence that PAHs can withstand a supernova blast," [Achim Tappe] says." {permalink}

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Minor-Object Science  on 1 September '07

• "Near Infrared Spectra of Centaurs and Kuiper Belt Objects" by Barkume, K.M. with M.E. Brown & E.L. Schaller, PDF from Michael E. Brown 31 Aug. - Quote: "We present here an extensive survey of near infrared spectra of Kuiper belt objects (KBOs) and Centaurs taken with the Keck I Telescope. We find that most spectra in our sample are well characterized by a combination of water ice and a featureless continuum. A comparative analysis reveals that the near Infrared (NIR) spectral properties have little correlation to the visible colors or albedo, with the exception of the fragment KBOs produced from the giant impact on 2003 EL61. The results suggest that the surface composition of KBOs is heterogeneous, though the exposure of water ice may be controlled by geophysical processes. The Centaurs also display diverse spectral properties, but the source of the variability remains unclear. The results for both the KBOs and the Centaurs point to inherent heterogeneity in either the processes acting on these objects or materials from which they formed." {permalink}

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NEOCP Activity  on 1 September '07

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty and hasn't been noted by Major News as active yet today (last checked at 2354 UTC).

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New MPECs  on 1 September '07

Minor Planet Electronic Circulars

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

• MPEC 2007-R01 time-stamped "06:07 UT" - Daily Orbit Update - see below
• MPEC 2007-R02 time-stamped "18:49 UT" - 2003 UY413, 2003 UZ413, 2004 NT33, 2005 CA79, 2005 CB79, 2005 UQ513 - see below
• MPEC 2007-R03 time-stamped "20:23 UT" - 2004 PF115, 2004 PG115, 2004 XA192, 2005 QU182 - see below
• MPEC 2007-R04 time-stamped "21:43 UT" - Comet P/2007 N1 = 2000 P3 (McNaught)

MPEC 2007-R04 - "21:43 UT" - Comet P/2007 N1 = 2000 P3 (McNaught)

• PK07N010   P/2007 N1 (McNaught) (q=2.090 AU, Q=5.023 AU, TP=2001 Jan. 12.75938 TT) from Geisei Obs. (Aug. 24.77p1) and Kiev Comet Station (Aug. 25.04-05p2)
• PK00P030   P/2000 P3 from NEAT's USAF Haleakala telescope (2000 Aug. 5.35-37p3 & 2000 Nov. 30.25-27p3) and LONEOS (2000 Aug. 21.34-40p4)

MPEC 2007-R03 - "20:23 UT" - 2004 PF115, 2004 PG115, 2004 XA192, 2005 QU182

• K05QI2U   2005 QU182 was discovered at 0828 UT 30 Aug. 2005 by NEAT's Mt. Palomar telescope, which observed it at 2005 Aug. 30.35p1, 2005 Aug. 30.43p1, 2005 Aug. 30.49p1, 2005 Oct. 12.23p1, 2005 Oct. 12.30p1, and 2005 Nov. 5.10-13p2.
• K04XJ2A   2004 XA192 was discovered at 0451 UT 12 Dec. 2004 by NEAT/Palomar, which observed it at 2004 Dec. 12.20p1, 2004 Dec. 12.27p1, 2004 Dec. 12.35p1, 2005 March 11.20p1, and 2005 March 13.15p1.
• K04PB5G   2004 PG115 was discovered at 0541 UT 04 Aug. 2004 by NEAT/Palomar, which observed it at 2004 Aug. 4.24p1, 2004 Aug. 4.31p1, and 2004 Aug. 4.38p1. The discovery was confirmed by Mt. Palomar (2004 June 18.37p1 & 2004 June 19.37p1).
• K04PB5F   2004 PF115 was discovered at 0640 UT 07 Aug. 2004 by NEAT/Palomar, which observed it at 2004 Aug. 7.28p1, 2004 Aug. 7.34p1, 2004 Aug. 7.42p1, 2004 Sept. 23.18p1, and 2004 Sept. 23.22p1.

MPEC 2007-R02 - "18:49 UT" - 2003 UY413, 2003 UZ413, 2004 NT33, 2005 CA79, 2005 CB79, 2005 UQ513

• K05Up3Q   2005 UQ513 (q=36.698 AU, Q=49.930 AU, H=4.1 ~513 km) was discovered at 0328 UT 21 Oct. 2005 by NEAT/Palomar, which observed it at 2005 Oct. 21.14p1, 2005 Oct. 21.21p1, 2005 Oct. 21.28p1, 2005 Oct. 22.11p1, 2005 Oct. 22.18p1, 2005 Oct. 22.26p1, 2005 Oct. 23.10p1, 2005 Oct. 23.17p1, 2005 Oct. 23.23p1, 2005 Oct. 24.10p1, 2005 Oct. 24.16p1, 2005 Oct. 24.23p1, 2005 Oct. 26.28p1, 2005 Oct. 26.34p1, 2005 Oct. 26.41p1, 2005 Nov. 4.11-14p3, 2005 Nov. 30.12p1, 2005 Nov. 30.17p1, 2006 Sept. 15.13p1, 2006 Sept. 16.35p1, 2006 Sept. 16.40p1, 2006 Sept. 23.44p1, 2006 Sept. 25.18p1, and 2006 Sept. 26.31p1.
• K05C79B   2005 CB79 (q=37.102 AU, Q=49.411 AU, H=5.4 ~282 km) was discovered at 0649 UT 06 Feb. 2005 by NEAT/Palomar, which observed it at 2005 Feb. 6.28-34p6, 2005 March 11.34p1, 2005 March 13.22p1, 2006 Feb. 23.34p1, 2006 Feb. 23.39p1, 2006 March 25.22p1, and 2006 March 25.32p1.
• K05C79A   2005 CA79 (q=37.007 AU, Q=58.333 AU, H=5.5 ~269 km) was discovered at 0612 UT 01 Feb. 2005 by NEAT/Palomar, which observed it at 2005 Feb. 1.26p1, 2005 Feb. 1.33p1, 2005 Feb. 1.39p1, 2005 Feb. 2.21p1, 2005 Feb. 2.27p1, 2005 Feb. 2.34p1, 2005 April 13.13p2, 2005 April 14.13-16p2, 2005 Nov. 5.45p1, 2005 Nov. 5.50p1, 2006 March 25.21p1, and 2006 March 25.31p1.
• K04N33T   2004 NT33 (q=36.857 AU, Q=50.436 AU, H=5.3 ~295 km) was discovered at 0537 UT 13 July 2004 by NEAT/Palomar, which observed it at 2004 July 13.23p1, 2004 July 13.31p1, 2004 July 13.38p1, 2005 July 3.28p1, 2005 July 3.34p1, 2005 July 3.41p1, 2005 July 4.33p1, 2005 July 4.41p1, 2005 July 4.47p1, 2005 July 29.38p1, 2005 July 30.29p1, 2006 Sept. 14.15p1, 2006 Sept. 15.12p1, and 2006 Sept. 16.31p1.
• K03Uf3Z   2003 UZ413 (q=30.583 AU, Q=47.251 AU, H=4.7 ~389 km) was discovered at 0628 UT 21 Oct. 2003 by NEAT/Palomar, which observed it at 2003 Aug. 30.39p1, 2003 Sept. 29.36p1, 2003 Oct. 21.27p1, 2003 Oct. 21.34p1, 2003 Oct. 21.41p1, 2006 Sept. 14.52p1, 2006 Sept. 16.35p1, 2006 Sept. 16.39p1, 2006 Sept. 23.41p1, and 2006 Sept. 24.40p1.
• K03Uf3Y   2003 UY413 (q=28.380 AU, Q=104.544 AU, H=5.7 ~245 km) was discovered at 0429 UT 19 Oct. 2003 by NEAT/Palomar, which observed it at 2003 Oct. 19.19p1, 2003 Oct. 19.27p1 at R=22.1, 2003 Oct. 19.33p1, 2004 Sept. 22.40p1, 2004 Sept. 22.47p1, 2004 Sept. 23.41p1, and 2004 Sept. 23.47p1. The discovery was confirmed by Cerro Tololo Inter-American Obs. (CTIO) (2003 Nov. 28.02p1 & 2003 Nov. 28.11p1).

<< DOU on 1 Sept. '07 >>  MPEC 2007-R01 - "06:07 UT" - Daily Orbit Update

• K07P25H   2007 PH25 (i=53.2°, Q=4.615 AU, arc=19 days, H=16.6 ~1.62 km) from Shenton Park Obs. (Aug. 31.89-90p3)
• K07P09R   2007 PR9 (arc=19 days, H=20.6 ~257m) from program code "(" via Australian Natl. Univ. 1m telescope (Aug. 30.62p3)
• K07P06P   2007 PP6 (q=0.361 AU, arc=22 days, H=17.1 ~1.29 km) from Shenton Park Obs. (Aug. 31.50-51p3)
• K07K04N   2007 KN4 (Q=5.446 AU, arc=3 opp, H=17.0 ~1.35 km) from NEAT/Palomar (2001 Oct. 12.50-52p2, 2001 Oct. 20.51-53p2 & 2001 Oct. 21.39-43p3)
• K07D41A   2007 DA41 (arc=3 opp, H=17.5 ~1.07 km) from Remanzacco Obs. (Aug. 31.92p1)
• 53426   53426 1999 SL5 from Herrenberg Obs. (Aug. 30.88-89p3)

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Observers  on 1 September '07

Eleven observing facilities appear in today's MPECs.

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Impact Risk Monitoring  on 1 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 1 September '07

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