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On this day sixteen years ago, the Jupiter-bound NASA Galileo spacecraft performed the first-ever asteroid flyby, passing 951 Gaspra, which is seen here in exaggerated color. Credit: NASA/JPL.

Contents  on 29 October '07

• IAU Minor Planet Center
  • NEOCP Activity -- one listing: 1 updated
  • New MPECs -- five MPECs
  • Observers -- 20 observing facilities
• Impact Risk Monitoring -- five objects reported
• Chronology

Resources:

• Consolidated Risk Tables - CRT page
• Old & new CRT Archive
• Ephemerides for risk-rated objects
• Old News Archive & Small Objects Archive

  Note: Due to travel, this Web site and its news pages will update less frequently and at sometimes irregular intervals during the rest of October and early November.

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, which now has its own backup RSS news feed.

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.

<<   Top | Contents | NEOCP | MPECs | Observers | Risks | Chronology | Index   >>

NEOCP Activity  on 29 October '07

The MPC's NEO Confirmation Page has 1 listing: 1 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one updated listing. This was a "one nighter." So far The Tracking News has counted a total of five objects listed on the NEOCP at some point today.

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

<<   Top | Contents | NEOCP | MPECs | Observers | Risks | Chronology | Index   >>

New MPECs  on 29 October '07

Minor Planet Electronic Circulars

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

• MPEC 2007-U81 time-stamped "06:09 UT" - Daily Orbit Update - see below
• MPEC 2007-U82 time-stamped "15:50 UT" - 2007 UL12 - see below
• MPEC 2007-U83 time-stamped "15:53 UT" - 2007 UM12 - see below
• MPEC 2007-U84 time-stamped "16:38 UT" - 2007 UN12 - see below
• MPEC 2007-U85 time-stamped "17:43 UT" - 1990 UO = 2007 UV3

MPEC 2007-U85 - "17:43 UT" - 1990 UO = 2007 UV3

• J90U00O   1990 UO (q=0.285 AU, H=19.7 ~389m) from the Mt. Lemmon Survey (MLS) (Sept. 18.43-44p4)

MPEC 2007-U84 - "16:38 UT" - 2007 UN12

• K07U12N   2007 UN12 (risk-listed, Earth MOID=0.4 LD, H=28.6 ~6m) was discovered at 0856 UT on 21 Oct. by the Catalina Sky Survey (CSS), which observed it at Oct. 21.37-39p3 and 21.44-45p3. The discovery was confirmed by Lindenberg Obs. (Oct. 21.99p3), Schiaparelli Obs. (Oct. 22.09-10p3), Astronomical Research Obs. (ARO) (Oct. 22.30-31p3), Guidestar Obs. (Oct. 22.78-82p4), Gnosca Obs. (Oct. 22.87-88p3), the Spacewatch 1.8m telescope (Oct. 23.21-22p3), LINEAR (Oct. 23.31-36p4), Farpoint Obs. (Oct. 23.31-32p3), Great Shefford Obs. (Oct. 23.88-93p5), Jim Young via Table Mtn. Obs. (Oct. 24.26-30p4), MLS (Oct. 24.30-31p4, 24.40p4 & 25.32p4), and Grasslands Obs. (Oct. 25.40p2). This object is now within ten lunar distances (LD) of Earth, reaching 4.1 LD on 27 Oct.

MPEC 2007-U83 - "15:53 UT" - 2007 UM12

• K07U12M   2007 UM12 (H=21.6 ~162m) was discovered at 0547 UT on 26 Oct. by the MLS, which observed it at Oct. 26.24-27p8 and 27.07-08p4. The discovery was confirmed by Magdalena Ridge Obs. (MRO) (Oct. 27.11-12p9 & 28.13p5), the Siding Spring Survey (SSS) (Oct. 27.48-49p2), ARO (Oct. 28.02-03p3), and Great Shefford Obs. (Oct. 28.89-91p2).

MPEC 2007-U82 - "15:50 UT" - 2007 UL12

• K07U12L   2007 UL12 (risk-listed, q=0.386 AU, Earth MOID=7.9 LD, H=20.4 ~282m) was discovered at 1126 UT on 25 Oct. by the MLS, which observed it at Oct. 25.48-53p7, 26.31-32p4, 26.47p4, and 26.53p4. The discovery was confirmed by ARO (Oct. 28.25-26p3).

<< DOU on 29 Oct. '07 >>  MPEC 2007-U81 - "06:09 UT" - Daily Orbit Update

• Observations of risk-listed objects
• K07U01Y   2007 UY1 (small asteroid, arc=10 days, H=22.8 ~93m) from MRO (Oct. 28.14-15p5)
• K07T72H   2007 TH72 (small asteroid, arc=13 days, H=24.2 ~49m) from MRO (Oct. 28.16-22p5)
• K07T24U   2007 TU24 (arc=17 days, H=20.1 ~323m) from Tenagra II Obs. (Oct. 28.22p3)
• Observations of small asteroids (H>22.0)
• K07U02C   2007 UC2 (arc=10 days, H=23.0 ~85m) from ARO (Oct. 28.04-05p3) and Tenagra II Obs. (Oct. 28.24p3)
• Observations of almost-small asteroids (21.7<H<=22.0)
• K07T66D   2007 TD66 (arc=16 days, H=21.9 ~141m) from ARO (Oct. 28.06-07p3)
• Observations of other objects
• K07U00T   2007 UT (i=45.7°, arc=11 days, H=21.5 ~170m) from Shenton Park Obs. (Oct. 28.64p3) and Begues Obs. (Oct. 28.76p4)
• K07T65R   2007 TR65 (i=43.5°, arc=16 days, H=18.9 ~562m) from Shenton Park Obs. (Oct. 28.64-65p3)
• K07T15G   2007 TG15 (arc=21 days, H=19.7 ~389m) from Lindenberg Obs. (Oct. 28.74-75p3) and Greiner Research Obs. (Oct. 29.01-02p8)
• K07R19V   2007 RV19 (Q=5.322 AU, arc=124 days, H=18.8 ~589m) from Tenagra II Obs. (Oct. 28.20-21p3)
• K07R17W   2007 RW17 (arc=45 days, H=21.4 ~178m) from Tenagra II Obs. (Oct. 28.23p2)
• K07R17U   2007 RU17 (q=0.356 AU, arc=45 days, H=18.2 ~776m) from ARO (Oct. 28.03-04p3) and Tenagra II Obs. (Oct. 28.21p3)
• K07R05F   2007 RF5 (arc=53 days, H=18.4 ~708m) from Petit Jean Mtn. South Obs. (PJMSO) (Oct. 28.25-26p6)
• K07P11U   2007 PU11 (Q=4.384 AU, arc=3 opp, H=16.3 ~1.86 km) from PJMSO (Oct. 28.32-33p6)
• K07L32R   2007 LR32 (arc=156 days, H=17.2 ~1.23 km) from Lindenberg Obs. (Oct. 28.73-74p3)
• K02RB8C   2002 RC118 (Q=4.624 AU, arc=2 opp, H=16.7 ~1.55 km) from PJMSO (Oct. 28.30-31p5)
• 02340   2340 Hathor (1976 UA) from SSS (Oct. 27.51p2)
• 02212   2212 Hephaistos (1978 SB) from PJMSO (Oct. 28.31-32p5)

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Observers  on 29 October '07

A total of 20 observing facilities appear in today's MPECs.

<<   Top | Contents | NEOCP | MPECs | Observers | Risks | Chronology | Index   >>

Impact Risk Monitoring  on 29 October '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 a variant 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" to learn more.

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Chronology  on 29 October '07

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