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Contents  on 22 December '08

• Radar Astrometry -- one object
• IAU Minor Planet Center
  • NEOCP Activity -- five listings: 1 new, 4 updated
  • New MPECs -- 20 MPECs
• Observers -- 26 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 22 December '08

Radar observation of one object

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

Data update noted at 0058 UTC when the database was dated 21 Dec.

• 2008 EV5 from Goldstone DSS-14 70m antenna (Dec. 21.33 range) - see links

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NEOCP Activity  on 22 December '08

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

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and four updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of 29 objects listed on the NEOCP at some point today.

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

New MPECs  on 22 December '08

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 20 MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

• MPEC 2008-Y24 time-stamped "03:13 UT" - 2007 TS19 - see below
• MPEC 2008-Y25 time-stamped "03:59 UT" - 2000 BL19 - see below
• MPEC 2008-Y26 time-stamped "07:05 UT" - Daily Orbit Update - see below
• MPEC 2008-Y27 time-stamped "12:26 UT" - 2008 CH116 - see below
• MPEC 2008-Y28 time-stamped "14:18 UT" - 2005 YX128 - see below
• MPEC 2008-Y29 time-stamped "17:05 UT" - 2008 YJ2 - see below
• MPEC 2008-Y30 time-stamped "17:08 UT" - 2008 YK2 - see below
• MPEC 2008-Y31 time-stamped "17:11 UT" - 2008 YL2 - see below
• MPEC 2008-Y32 time-stamped "17:14 UT" - 2008 YM2 - see below
• MPEC 2008-Y33 time-stamped "17:17 UT" - 2008 YN2 - see below
• MPEC 2008-Y34 time-stamped "17:20 UT" - 2008 YO2 - see below
• MPEC 2008-Y35 time-stamped "17:24 UT" - 2008 YP2 - see below
• MPEC 2008-Y36 time-stamped "17:27 UT" - 2008 YQ2 - see below
• MPEC 2008-Y37 time-stamped "17:29 UT" - 2008 YR2 - see below
• MPEC 2008-Y38 time-stamped "19:11 UT" - 2008 YB3 - see below
• MPEC 2008-Y39 time-stamped "19:14 UT" - 2008 YC3 - see below
• MPEC 2008-Y40 time-stamped "19:16 UT" - 2008 YD3 - see below
• MPEC 2008-Y41 time-stamped "19:28 UT" - 2008 YE3 - see below
• MPEC 2008-Y42 time-stamped "21:34 UT" - 2008 YF3 - see below
• MPEC 2008-Y43 time-stamped "21:39 UT" - 2008 YG3

MPEC 2008-Y43 - "21:39 UT" - 2008 YG3

• K08Y03G   2008 YG3 (borderline-small, H=21.9 ~141m) was discovered at 0732 UT on 22 Dec. by the Catalina Sky Survey (CSS), which observed it at Dec. 22.31-37p7. The discovery was confirmed by Naef Obs. (Dec. 22.76-78p3), Engelhardt Obs. Zelenchukskaya Station (Dec. 22.81p3), and Calar Alto Obs. (Dec. 22.84p3).

MPEC 2008-Y42 - "21:34 UT" - 2008 YF3

• K08Y03F   2008 YF3 (H=21.3 ~186m) was discovered at 0633 UT on 21 Dec. by LINEAR, which observed it at Dec. 21.27-30p3. The discovery was confirmed by Calar Alto Obs. (Dec. 22.14p3 & 22.87p3), Sabino Canyon Obs. (Dec. 22.35-36p2), and Naef Obs. (Dec. 22.85-88p3).

MPEC 2008-Y41 - "19:28 UT" - 2008 YE3

• K08Y03E   2008 YE3 (Q=4.538 AU, H=20.2 ~309m) was discovered at 0936 UT on 22 Dec. by CSS, which observed it at Dec. 22.40-42p4 and 22.50-52p4. The discovery was confirmed by Tzec Maun Obs. Mayhill (Dec. 22.51-52p6).

MPEC 2008-Y40 - "19:16 UT" - 2008 YD3

• K08Y03D   2008 YD3 (risk-listed, H=26.2 ~19m) was discovered at 0813 UT on 22 Dec. by the Mt. Lemmon Survey (MLS), which observed it at Dec. 22.34-38p8 at V=20.6-22.2 and 22.48-49p4 at V=21.8-22.2.

MPEC 2008-Y39 - "19:14 UT" - 2008 YC3

• K08Y03C   2008 YC3 (risk-listed, Earth MOID=2.0 LD, H=25.4 ~28m) was discovered at 0603 UT on 22 Dec. by CSS, which observed it at Dec. 22.25-31p7 and 22.36p3. The discovery was confirmed by Naef Obs. (Dec. 22.75-76p3).

MPEC 2008-Y38 - "19:11 UT" - 2008 YB3

• K08Y03B   2008 YB3 (i=104.6°, q=5.502 AU, Q=32.637 AU, H=9.2 ~49.0 km) was discovered at 1441 UT on 18 Dec. by the Siding Spring Survey (SSS), which observed it at Dec. 18.61-65p4, 18.75p1, 19.54p1, 19.64p1, and 22.71-72p3.

MPEC 2008-Y37 - "17:29 UT" - 2008 YR2

• K08Y02R   2008 YR2 (H=19.0 ~537m) was discovered at 1258 UT on 21 Dec. by CSS, which observed it at Dec. 21.54-55p4. The discovery was confirmed by Calar Alto Obs. (Dec. 22.07-08p3) and MLS (Dec. 22.45-47p4).

MPEC 2008-Y36 - "17:27 UT" - 2008 YQ2

• K08Y02Q   2008 YQ2 (small asteroid, Earth MOID=7.5 LD, H=24.7 ~39m) was discovered at 0955 UT on 21 Dec. by CSS, which observed it at Dec. 21.41-44p7 and 22.37-39p4. The discovery was confirmed by Magdalena Ridge Obs. (MRO) (Dec. 21.45-47p7 & 22.24-25p5), Schiaparelli Obs. (Dec. 21.00p2), Remanzacco Obs. (Dec. 22.01p1), Calar Alto Obs. (Dec. 22.06p3), MLS (Dec. 22.32p3), and Sabino Canyon Obs. (Dec. 22.41p3). This object will be coming within ten lunar distances (LD) of Earth, reaching 8.8 LD on 24 Dec.

MPEC 2008-Y35 - "17:24 UT" - 2008 YP2

• K08Y02P   2008 YP2 (small asteroid, H=23.4 ~71m) was discovered at 0813 UT on 21 Dec. by MLS, which observed it at Dec. 21.34-40p8 and 22.19-21p4. The discovery was confirmed by Calar Alto Obs. (Dec. 21.91-92p3), the Spacewatch 1.8m telescope (Dec. 22.23p3), and Sandlot Obs. (Dec. 22.24-25p2).

MPEC 2008-Y34 - "17:20 UT" - 2008 YO2

• K08Y02O   2008 YO2 (risk-listed, Earth MOID=0.2 LD, H=25.2 ~31m) was discovered at 0357 UT on 21 Dec. by MLS, which observed it at Dec. 21.17-22p8, 21.31p4, and 22.12p4. The discovery was confirmed by MRO (Dec. 21.25-26p4 & 22.14-17p5).

MPEC 2008-Y33 - "17:17 UT" - 2008 YN2

• K08Y02N   2008 YN2 (risk-listed, Earth MOID=2.7 LD, H=26.2 ~19m) was discovered at 0326 UT on 21 Dec. by MLS, which observed it at Dec. 21.14-19p8, 21.28-29p4, and 22.13p4. The discovery was confirmed by CSS (Dec. 21.20p4), MRO (Dec. 21.21-23p4), Calar Alto Obs. (Dec. 21.80-81p3), Schiaparelli Obs. (Dec. 21.89p1 & 21.94p1), and Sandlot Obs. (Dec. 22.19-22p3).

MPEC 2008-Y32 - "17:14 UT" - 2008 YM2

• K08Y02M   2008 YM2 (small asteroid, H=23.9 ~56m) was discovered at 0255 UT on 21 Dec. by MLS, which observed it at Dec. 21.12-14p4, 21.18-21p8, and 22.12-13p4. The discovery was confirmed by MRO (Dec. 21.18-20p5), CSS (Dec. 21.20p4), Calar Alto Obs. (Dec. 21.79p4), Schiaparelli Obs. (Dec. 21.80p1 & 21.85p1), and Sandlot Obs. (Dec. 22.09-11p3).

MPEC 2008-Y31 - "17:11 UT" - 2008 YL2

• K08Y02L   2008 YL2 (small asteroid, Earth MOID=4.7 LD, H=24.5 ~43m) was discovered at 0232 UT on 21 Dec. by MLS, which observed it at Dec. 21.11-16p8, 21.24p3, and 22.13p4. The discovery was confirmed by MRO (Dec. 21.14-17p6), CSS (Dec. 21.19-20p8 & 22.25-30p10), Schiaparelli Obs. (Dec. 21.78p2 & 21.82p1), Calar Alto Obs. (Dec. 21.86p3), Sormano Obs. (Dec. 21.90-91p3), Sandlot Obs. (Dec. 22.14-15p3), and Sabino Canyon Obs. (Dec. 22.32p3).

MPEC 2008-Y30 - "17:08 UT" - 2008 YK2

• K08Y02K   2008 YK2 (H=19.4 ~446m) was discovered at 0751 UT on 20 Dec. by LINEAR, which observed it at Dec. 20.33-38p5 and 21.32-37p5. The discovery was confirmed by CAST Obs. (Dec. 20.95-96p3), Bergen-Enkheim Obs. (Dec. 20.97-01p6), Farra d'Isonzo Obs. (Dec. 20.97-98p3), Calar Alto Obs. (Dec. 21.01p3), Winer Obs. (Dec. 21.19-20p3), La Sagra Obs. (Dec. 21.22-25p3), Sabino Canyon Obs. (Dec. 21.27p3), MRO (Dec. 21.28-29p5), Sormano Obs. (Dec. 21.92p3), Remanzacco Obs. (Dec. 21.94p2), Schiaparelli Obs. (Dec. 21.98-99p3), E. Guido via RAS Obs. Mayhill (Dec. 22.35-36p3), and Moriyama Obs. (Dec. 22.64-66p4).

MPEC 2008-Y29 - "17:05 UT" - 2008 YJ2

• K08Y02J   2008 YJ2 (H=21.1 ~204m) was discovered at 0331 UT on 20 Dec. by LINEAR, which observed it at Dec. 20.15-19p4 and 21.06-11p4. The discovery was confirmed by MLS (Dec. 21.10p4), MRO (Dec. 21.11-12p5), Jim Young via Table Mtn. Obs. (Dec. 21.13-16p5), Winer Obs. (Dec. 21.16-17p3), Spacewatch 1.8m (Dec. 21.17-18p3), Sabino Canyon Obs. (Dec. 21.18-19p2), Schiaparelli Obs. (Dec. 21.74-75p3), Calar Alto Obs. (Dec. 21.76p3), New Millennium Obs. (Dec. 21.83-85p9), Sormano Obs. (Dec. 21.84p3), Remanzacco Obs. (Dec. 21.90p2), and Sandlot Obs. (Dec. 22.00-02p2).

MPEC 2008-Y28 - "14:18 UT" - 2005 YX128

• K05YC8X   2005 YX128 (H=18.9 ~562m) from MLS (Dec. 21.34-40p8 at V=20.8-22.3 & 22.19-21p4 at V=21.2-21.4), Calar Alto Obs. (Dec. 21.87p3), and Spacewatch 1.8m (Dec. 22.21-22p3)

MPEC 2008-Y27 - "12:26 UT" - 2008 CH116

• K08CB6H   2008 CH116 (q=0.273 AU, H=19.0 ~537m) from Calar Alto Obs. (Dec. 21.22-23p3 & 22.23-25p3)

<< DOU on 22 Dec. '08 >>  MPEC 2008-Y26 - "07:05 UT" - Daily Orbit Update

No observations of objects are reported.

MPEC 2008-Y25 - "03:59 UT" - 2000 BL19

• K00B19L   2000 BL19 (Q=4.472 AU, H=19.9 ~355m) from Calar Alto Obs. (Dec. 21.15-17p3 & 21.96-99p3)

MPEC 2008-Y24 - "03:13 UT" - 2007 TS19

• K07T19S   2007 TS19 (H=20.6 ~257m) from David Tholen's team on Mauna Kea (Sept. 16.42p1 at R=20.9 & Oct. 21.27p1 at R=22.3)

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Observers  on 22 December '08

A total of 26 observing facilities appear in today's MPECs.

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

Impact Risk Monitoring  on 22 December '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 22 December '08

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