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Contents  on 30 January '08

• Radar Astrometry -- one object
• IAU Minor Planet Center
  • NEOCP Activity -- five listings: 4 new, 1 updated
  • New MPECs -- five MPECs
  • Observers -- nineteen observing facilities
• Impact Risk Monitoring -- four objects
• Chronology

Resources:

• Consolidated Risk Tables - the CRT page
• Earth's Busy Neighborhood Traffic Report
• Ephemerides for risk-rated and nearby objects
• Old & new CRT Archive
• Old News Archive & Small Objects Archive

The latest A/CC news is available via framed access,  RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate 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 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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Radar Astrometry  on 30 January '08

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added the following small-body radar observing work:

Data addition noted at 2000 UTC when the database was dated 30 Jan.

• 2007 TU24 from Arecibo (transmit) with Green Bank (receive) at Jan. 28.85 (velocity) - see links

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NEOCP Activity  on 30 January '08

The MPC's NEO Confirmation Page has 5 listings: 4 new, 1 updated

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

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New MPECs  on 30 January '08

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 2008-B62 time-stamped "07:09 UT" - Daily Orbit Update - see below
• MPEC 2008-B63 time-stamped "16:45 UT" - 2008 BC15 - see below
• MPEC 2008-B64 time-stamped "16:48 UT" - 2008 BD15 - see below
• MPEC 2008-B65 time-stamped "16:54 UT" - 2008 BE15 - see below
• MPEC 2008-B66 time-stamped "23:32 UT" - 2008 BH16

MPEC 2008-B66 - "23:32 UT" - 2008 BH16

• K08B16H   2008 BH16 (H=20.6 ~257m) was discovered at 0908 UT on 30 Jan. by the Catalina Sky Survey (CSS), which observed it at Jan. 30.38-43p6. The discovery was confirmed by Farpoint Obs. (Jan. 30.41-42p3) and Skylive Obs. (Jan. 30.93-95p4).

MPEC 2008-B65 - "16:54 UT" - 2008 BE15

• K08B15E   2008 BE15 (risk-listed, Earth MOID=4.9 LD, H=24.7 ~39m) was discovered at 0911 UT on 30 Jan. by the CSS, which observed it at Jan. 30.38-43p8 and 30.48p4. The discovery was confirmed by Farpoint Obs. (Jan. 30.43-44p4). This object will be coming within ten lunar distances (LD) of Earth, reaching 9.9 LD on 5 Feb.

MPEC 2008-B64 - "16:48 UT" - 2008 BD15

• K08B15D   2008 BD15 (Earth MOID=4.2 LD, H=20.7 ~245m) was discovered at 0730 UT on 30 Jan. by the CSS, which observed it at Jan. 30.31-37p8 and 30.44p4. The discovery was confirmed by Farpoint Obs. (Jan. 30.38-39p3).

MPEC 2008-B63 - "16:45 UT" - 2008 BC15

• K08B15C   2008 BC15 (risk-listed, Earth MOID=0.5 LD, H=26.7 ~15m) was discovered at 0729 UT on 30 Jan. by the CSS, which observed it at Jan. 30.31-37p8 and 30.44-49p8. The discovery was confirmed by Farpoint Obs. (Jan. 30.39-40p4). This object is now within ten lunar distances (LD) of Earth, reaching 0.8 LD on 31 Jan. (INTRUDER).

<< DOU on 30 Jan. '08 >>  MPEC 2008-B62 - "07:09 UT" - Daily Orbit Update

• Observations of risk-listed objects
• K08A04F   2008 AF4 (arc=20 days, H=19.8 ~371m) from Balzaretto Obs. (Jan. 29.89-91p5), Consell Obs. (Jan. 29.96p5), and Powell Obs. (Jan. 30.19-20p4)
• K07Y56V   2007 YV56 (arc=30 days, H=21.0 ~214m) from Powell Obs. (Jan. 30.23-24p3)
• Observations of recently (no longer) risk-listed objects
• K08A33N   2008 AN33 (Q=4.341 AU, arc=12 days, H=18.9 ~562m) from Astronomical Research Obs. (ARO) (Jan. 27.38-39p3)
• K08A33L   2008 AL33 (small asteroid, arc=12 days, H=22.8 ~93m) from ARO (Jan. 27.17-19p3)
• K08A33K   2008 AK33 (arc=15 days, H=20.6 ~257m) from the Spacewatch 1.8m telescope (Jan. 30.21-22p3)
• K07Y56Q   2007 YQ56 (arc=30 days, H=19.9 ~355m) from Spacewatch 1.8m (Jan. 30.11-13p3)
• K07Y56M   2007 YM56 (small asteroid, arc=29 days, H=22.3 ~117m) from ARO (Jan. 28.17-18p3)
• K07Y29V   2007 YV29 (arc=2 opp, H=18.8 ~589m) from Gnosca Obs. (Jan. 29.79-81p2)
• K07X11K   2007 XK11 (Q=4.490 AU, arc=50 days, H=19.2 ~490m) from ARO (Jan. 25.10-13p3 at V=22.1)
• Observations of almost-small asteroids (21.7<H<=22.0)
• K08A30Z   2008 AZ30 (arc=18 days, H=21.9 ~141m) from ARO (Jan. 25.16p1) and Spacewatch 1.8m (Jan. 30.16-17p3)
• Observations of other objects
• K08A33M   2008 AM33 (arc=12 days, H=21.4 ~178m) from ARO (Jan. 27.34-35p3)
• K08A32F   2008 AF32 (arc=17 days, H=21.0 ~214m) from Powell Obs. (Jan. 30.25-26p3)
• K08A28V   2008 AV28 (arc=42 days, H=19.6 ~407m) from ARO (Jan. 28.23-24p3) and Spacewatch 1.8m (Jan. 30.15p3)
• K07Y58Z   2007 YZ58 (arc=25 days, H=19.6 ~407m) from ARO (Jan. 25.18-19p2)
• K07Y56O   2007 YO56 (arc=29 days, H=20.2 ~309m) from ARO (Jan. 28.19-20p2)
• K07Y01F   2007 YF1 (Q=4.001 AU, arc=43 days, H=18.7 ~616m) from ARO (Jan. 27.13-14p4 & 28.22-23p3)
• K07W03Y   2007 WY3 (Q=4.938 AU, arc=68 days, H=18.2 ~776m) from ARO (Jan. 25.21-24p3)
• K07T24U   2007 TU24 (arc=111 days, H=20.6 ~257m) from Stia Obs. (Jan. 29.72-73p4), Montana Blanca Obs. (Jan. 29.82-83p3), Verona Obs. (Jan. 29.84p5), CAST Obs. (Jan. 29.87p5), Remanzacco Obs. (Jan. 29.87-90p5), and Consell Obs. (Jan. 29.94-95p10)
• K07T23C   2007 TC23 (Q=4.524 AU, arc=109 days, H=20.5 ~269m) from ARO (Jan. 27.36-38p3)
• K07E88H   2007 EH88 (arc=3 opp, H=19.8 ~371m) from ARO (Jan. 23.28-30p3)
• K03B35T   2003 BT35 (i=57.3°, arc=3 opp, H=18.6 ~645m) from ARO (Jan. 27.41-42p3)
• K02S00Z   2002 SZ (arc=3 opp, H=20.4 ~282m) from ARO (Jan. 25.35-38p3)
• K00E26J   2000 EJ26 (arc=3 opp, H=19.3 ~467m) from ARO (Jan. 27.37-39p3)
• K00C59H   2000 CH59 (arc=3 opp, H=19.9 ~355m) from Mandi Obs. (Jan. 29.94-96p3)
• J93U00D   1993 UD (arc=4 opp, H=20.2 ~309m) from ARO (Jan. 27.40-42p3 at V=22.1)
• G2161   162161 1999 DK3 from ARO (Jan. 25.32-34p3)
• F4555   154555 2003 HA from CSS (2007 Oct. 10.49-50p4)
• F3591   153591 2001 SN263 from Dark Roseanne Obs. (Jan. 28.98p1 & 29.04-08p2)
• D6793   136793 1997 AQ18 from LINEAR (Jan. 29.22-27p5)
• A1869   101869 1999 MM from LINEAR (Jan. 29.15-20p5)
• 99248   99248 2001 KY66 from ARO (Jan. 25.39-40p3)
• 34613   34613 2000 UR13 from LINEAR (Jan. 29.28-33p5)
• 33342   33342 1998 WT24 from LINEAR (Jan. 29.10-13p4)
• 21374   21374 1997 WS22 from CSS (2007 Oct. 10.45-48p4)
• 18736   18736 1998 NU from LINEAR (Jan. 29.15-20p5)
• 04954   4954 Eric (1990 SQ) from LINEAR (Jan. 29.15-19p5)
• 03102   3102 Krok (1981 QA) from ARO (Jan. 25.30-31p3)

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Observers  on 30 January '08

Nineteen observing facilities appear in today's MPECs.

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Impact Risk Monitoring  on 30 January '08

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 30 January '08

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