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Contents  on 23 January '08

• IAU Minor Planet Center
  • NEOCP Activity -- two listings: 2 updated
  • New MPECs -- three MPECs
  • Observers -- five observing facilities
• Impact Risk Monitoring -- one object
• 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.

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

NEOCP Activity  on 23 January '08

The MPC's NEO Confirmation Page has 2 listings: 2 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two updated listings.

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 23 January '08

Minor Planet Electronic Circulars

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

• MPEC 2008-B35 time-stamped "04:41 UT" - Comets C/2007 W9, 2007 W10, 2007 W11, 2007 W12 (SOHO) - see below
• MPEC 2008-B36 time-stamped "04:48 UT" - Comets C/2007 X1, 2007 X2, 2007 X3, 2007 X4, 2007 X5 (SOHO) - see below
• MPEC 2008-B37 time-stamped "07:10 UT" - Daily Orbit Update

<< DOU on 23 Jan. '08 >>  MPEC 2008-B37 - "07:10 UT" - Daily Orbit Update

• Observations of risk-listed objects
• K08A04F   2008 AF4 (arc=13 days, H=19.8 ~371m) from Greiner Research Obs. (Jan. 23.17p10)
• Observations of recently (no longer) risk-listed objects
• K08A04E   2008 AE4 (small asteroid, arc=11 days, H=23.8 ~59m) from the Mt. Lemmon Survey (MLS) (Jan. 21.28p4)
• Observations of small asteroids (H>22.0)
• K07Y56T   2007 YT56 (arc=19 days, H=23.4 ~71m) from the Spacewatch 0.9m telescope (Jan. 19.15p1)
• Observations of other objects
• K08A28V   2008 AV28 (arc=32 days, H=19.5 ~426m) from Spacewatch 0.9m (Jan. 20.36-39p3)
• K06N00M   2006 NM (Q=4.498 AU, arc=2 opp, H=16.3 ~1.86 km) from Spacewatch 0.9m (Jan. 19.23-26p3)
• K06K01T   2006 KT1 (arc=3 opp, H=16.6 ~1.62 km) from Spacewatch 0.9m (Jan. 19.28-32p2 & 20.23-25p2)
• K06BE8A   2006 BA148 (arc=2 opp, H=18.5 ~676m) from Spacewatch 0.9m (Jan. 20.47-51p3)
• K04BC1G   2004 BG121 (arc=3 opp, H=18.9 ~562m) from Spacewatch 0.9m (Jan. 20.24-27p3)
• K03Q90B   2003 QB90 (arc=3 opp, H=18.1 ~812m) from Spacewatch 0.9m (Jan. 19.23p1)
• J99R28Q   1999 RQ28 (arc=2 opp, H=20.7 ~245m) from Spacewatch 0.9m (Jan. 20.34p1)
• H0891   170891 2004 TY16 from Greiner Research Obs. (Jan. 23.15p9)
• G2058   162058 1997 AE12 from Spacewatch 0.9m (Jan. 20.42-45p3)
• F3591   153591 2001 SN263 from Greiner Research Obs. (Jan. 23.13p10)
• 68359   68359 2001 OZ13 from Greiner Research Obs. (Jan. 23.16-17p7)
• 66407   66407 1999 LQ28 from Bergen-Enkheim Obs. (Jan. 22.93-96p6)
• 09172   9172 Abhramu (1989 OB) from Spacewatch 0.9m (Jan. 20.13-16p3)
• 05131   5131 1990 BG from Greiner Research Obs. (Jan. 23.16p8)
• 04954   4954 Eric (1990 SQ) from Greiner Research Obs. (Jan. 23.13-14p10)
• 01685   1685 Toro (1948 OA) from Greiner Research Obs. (Jan. 23.11p9)
• 01036   1036 Ganymed (1924 TD) from Greiner Research Obs. (Jan. 23.11-12p26)

MPEC 2008-B36 - "04:48 UT" - Comets C/2007 X1, 2007 X2, 2007 X3, 2007 X4, 2007 X5 (SOHO)

• CK07X050   C/2007 X5 from the LASCO Coronagraph 3 on the Solar & Heliospheric Obs. (SOHO) (Dec. 7.68p2, 7.72-78p8, 7.85-86p4, 7.93p2, 7.97-03p8, 8.07-11p6, 8.18p2, 8.22-28p8 & 8.32-36p4) and the LASCO Coronagraph 2 on the Solar & Heliospheric Obs. (SOHO) (Dec. 8.40-54p18)
• CK07X040   C/2007 X4 from SOHO C3 (Dec. 5.39-53p14, 5.57p2, 5.64-78p16, 5.82-93p12, 5.97-03p8 & 6.07-15p10) and SOHO C2 (Dec. 6.16-35p28)
• CK07X030   C/2007 X3 from SOHO C2 (Dec. 4.81-85p8, 4.92-94p4 & 4.98p2)
• CK07X020   C/2007 X2 from SOHO C2 (Dec. 4.71-84p18)
• CK07X010   C/2007 X1 from SOHO C2 (Dec. 3.06-23p26)

MPEC 2008-B35 - "04:41 UT" - Comets C/2007 W9, 2007 W10, 2007 W11, 2007 W12 (SOHO)

• CK07W120   C/2007 W12 from SOHO C2 (Nov. 30.83-85p6 & 30.90-02p16)
• CK07W110   C/2007 W11 from SOHO C2 (Nov. 29.35-52p26)
• CK07W100   C/2007 W10 from SOHO C2 (Nov. 24.13-22p24)
• CK07W090   C/2007 W9 from SOHO C2 (Nov. 23.22-28p18)

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Observers  on 23 January '08

Five observing facilities appear in today's MPECs.

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Impact Risk Monitoring  on 23 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 23 January '08

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