Earth's temporary moon 2006 RH120 = 6R10DB9 
 imaged on 15 June 2006 at Great Shefford Obs.

The temporary natural Earth satellite previously known by its discovery designation, 6R10DB9, was today officially designated 2006 RH120 in MPEC 2008-D12 (see below) with an orbit solution credited to Paul Chodas at JPL. This copyrighted imagery is from Great Shefford Observatory from June 15th of last year, a week before the tiny asteroid was last tracked optically and shortly after it was observed by radar. See links for more info.


Contents  on 18 February '08

Resources:

The latest A/CC news is available via framed access, RSS news feed 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.

NEOCP Activity  on 18 February '08

The MPC's NEO Confirmation Page has 4 listings: 4 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four updated listings. Of these, three were "one nighters."

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

New MPECs  on 18 February '08

Minor Planet Electronic Circulars

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


MPEC 2008-D12 - "14:05 UT" - 2006 RH120


<< DOU on 18 Feb. '08 >>  MPEC 2008-D11 - "07:10 UT" - Daily Orbit Update


MPEC 2008-D10 - "00:55 UT" - Observations of Comets


MPEC 2008-D09 - "00:41 UT" - Comet C/2008 C1 (Chen-Gao)


MPEC 2008-D08 - "00:35 UT" - Comet C/2008 A1 (McNaught)


MPEC 2008-D07 - "00:32 UT" - Comet C/2007 Y2 (McNaught)


MPEC 2008-D06 - "00:29 UT" - Comet C/2007 Y1 (LINEAR)

Observers  on 18 February '08

A total of 69 observing facilities appear in today's MPECs.

CodeObserver / observatory
834AAAA Buenos Aires Obs. in Argentina, 3 in MPECs 2008-D08 & 2008-D10 -- C/2008 A1, C/2007 T1, C/2006 Q1
349Ageo Obs. in Japan, 8 in MPECs 2008-D06 & 2008-D10 -- C/2007 Y1, C/2007 T5, C/2007 M2, C/2006 S5, 192P, 180P, 124P, 70P
B37Ametlla del Valles Obs. in Spain, 10 in MPEC 2008-D10 -- C/2007 B2, P/2005 SB216, 180P, 172P, 124P, 110P, 79P, 74P, 65P, 29P
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2008-D11 -- 2008 CS1
J51Atlante Obs. in the Canary Islands, 7 in MPECs 2008-D09, 2008-D10 & 2008-D11 -- 2008 CN1, C/2008 C1, 2007 TG8, C/2007 B2, 2006 DU62, 2005 EK70, 1620
467Auckland Obs. in New Zealand, 1 in MPEC 2008-D10 -- 26P
B48Bocholt Obs. in Germany, 2 in MPEC 2008-D10 -- C/2007 T5, C/2006 S5
B59Borken Obs., 2 in MPEC 2008-D10 -- C/2007 B2, 124P
215Buchloe Obs. in Germany, 1 in MPEC 2008-D10 -- P/2007 T4
235CAST Obs. in Italy, 9 in MPECs 2008-D06, 2008-D09 & 2008-D10 -- C/2008 C1, C/2007 Y1, P/2007 T6, C/2007 S2, 180P, 110P, 65P, 29P, 7P
B09Capannoli Obs. in Italy, 2 in MPEC 2008-D10 -- C/2006 S5, 128P
703Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2008-D10 & 2008-D12 -- P/2007 T6, C/2007 M2, C/2007 D3, 2006 RH120, 183P, 179P, 172P, 108P, 65P, 7P
693Catalina Station in Arizona, 1 in MPEC 2008-D12 -- 2006 RH120
A77Chante-Perdrix Obs. in France, 3 in MPEC 2008-D10 -- C/2007 W3, C/2007 S2, 29P
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2008-D09 -- C/2008 C1
448Desert Moon Obs. in New Mexico, 5 in MPEC 2008-D11 -- 2008 CR116, 2008 CN1, 2008 CL72, 2008 CD22, 153591
J36El Olivo Obs. in Spain, 1 in MPEC 2008-D10 -- C/2007 D1
A27Eridanus Obs. in Germany, 1 in MPEC 2008-D11 -- 2007 TU24
734Farpoint Obs. in Kansas, 1 in MPEC 2008-D10 -- C/2002 VQ94
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2008-D11 -- 2007 DA
683Goodricke-Pigott Obs. in Arizona, 2 in MPEC 2008-D11 -- 3288, 1864
J95Great Shefford Obs. in England, 5 in MPECs 2008-D11 & 2008-D12 -- 2008 CR118, 2008 CP, 2008 CM20, 2008 AF4, 2006 RH120
458Guadarrama Obs. in Spain, 3 in MPEC 2008-D10 -- C/2006 S5, 46P, 29P
442Gualba Obs. in Spain, 3 in MPEC 2008-D10 -- C/2007 W1, C/2007 B2, 124P
379Hamamatsu-Yuto Obs. in Japan, 4 in MPEC 2008-D11 -- 2008 CN1, 2007 TG8, 2005 TU45, 2005 EK70
D88Hiratsuka Obs., 8 in MPECs 2008-D08, 2008-D09 & 2008-D10 -- C/2008 C1, C/2008 A1, P/2007 VQ11, C/2007 U1, C/2006 W3, 93P, 74P, 50P
048Hradec Kralove Obs. in the Czech Republic, 9 in MPECs 2008-D09 & 2008-D10 -- C/2008 C1, C/2007 W1, C/2007 B2, C/2006 W3, C/2006 S5, 110P, 93P, 46P, 29P
E14Hunters Hill Obs. in Australian Capital Territory, 1 in MPEC 2008-D11 -- 1620
246KLENOT in the Czech Republic, 2 in MPECs 2008-D10 & 2008-D11 -- 2008 CL116, 180P
415Kambah Obs. in the Australian Capital Territory, 8 in MPECs 2008-D07, 2008-D08 & 2008-D10 -- C/2008 A1, C/2007 Y2, C/2007 T1, C/2006 Q1, P/2006 HR30, C/2006 E1, 26P, 8P
585Kiev Comet Station in the Ukraine, 4 in MPECs 2008-D06, 2008-D09 & 2008-D10 -- C/2008 C1, C/2007 Y1, C/2006 S5, 172P
J66Kinver Obs. in England, 2 in MPEC 2008-D11 -- 2008 AF4, 2007 RX19
046Klet Obs. in the Czech Republic, 5 in MPECs 2008-D09 & 2008-D10 -- C/2008 C1, C/2007 B2, C/2006 S5, 65P, 29P
704LINEAR in New Mexico, 14 in MPECs 2008-D06 & 2008-D10 -- C/2007 Y1, C/2007 W1, P/2007 T6, C/2007 S2, C/2007 M2, C/2007 D3, C/2006 S5, P/2005 SB216, 191P, 179P, 173P, 128P, 79P, 65P
699LONEOS in Arizona, 5 in MPEC 2008-D10 -- P/2007 VQ11, P/2007 T6, C/2007 M2, 191P, 70P
J34La Fecha Obs. in Spain, 2 in MPECs 2008-D09 & 2008-D10 -- C/2008 C1, 29P
J38La Vara Obs. in Spain, 14 in MPECs 2008-D09 & 2008-D10 -- C/2008 C1, C/2007 W1, C/2007 T5, C/2006 W3, C/2006 S5, 191P, 173P, 110P, 93P, 65P, 50P, 46P, 29P, 17P
J59Linceo Obs. in Spain, 1 in MPEC 2008-D10 -- C/2006 S5
130Lumezzane Obs. in Italy, 4 in MPEC 2008-D10 -- P/2007 VQ11, C/2007 T5, 180P, 124P
232Masquefa Obs. in Spain, 2 in MPEC 2008-D10 -- C/2007 W1, C/2007 B2
A06Mataro Obs. in Spain, 8 in MPECs 2008-D10 & 2008-D11 -- C/2007 M2, C/2007 B2, C/2006 S5, 153591, 11398, 1620, 93P, 17P
118Modra Obs. in Slovakia, 1 in MPEC 2008-D11 -- 153591
J46Montana Blanca Obs. in the Canary Islands, 3 in MPECs 2008-D09, 2008-D10 & 2008-D11 -- C/2008 C1, 3554, 93P
213Montcabre Obs. in Spain, 6 in MPECs 2008-D09 & 2008-D10 -- C/2008 C1, C/2007 W1, C/2007 B2, 124P, 46P, 29P
945Monte Deva Obs. in Spain, 13 in MPECs 2008-D09 & 2008-D10 -- C/2008 C1, C/2007 W1, C/2007 U1, C/2007 B2, C/2006 W3, C/2006 S5, 180P, 124P, 110P, 93P, 65P, 46P, 17P
900Moriyama Obs. in Japan, 5 in MPEC 2008-D10 -- C/2007 B2, 93P, 65P, 46P, 17P
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2008-D10 & 2008-D12 -- C/2006 S5, 2006 RH120, 173P, 110P
J47Nazaret Obs. in Spain, 5 in MPECs 2008-D09 & 2008-D10 -- C/2008 C1, P/2007 T6, 46P, 29P, 7P
423North Ryde Obs. in New South Wales, 2 in MPECs 2008-D07 & 2008-D08 -- C/2008 A1, C/2007 Y2
H06RAS Obs. Mayhill in New Mexico, 3 in MPECs 2008-D09 & 2008-D10 -- C/2008 C1, 46P, 29P
473Remanzacco Obs. in Italy, 1 in MPEC 2008-D10 -- 29P
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2008-D12 -- 2006 RH120
233San Vito Obs. in Italy, 2 in MPEC 2008-D11 -- 2005 EK70, 4450
204Schiaparelli Obs. in Italy, 20 in MPECs 2008-D09, 2008-D10 & 2008-D11 -- 2008 CP, 2008 CN1, C/2008 C1, 2008 BD15, C/2007 W3, C/2007 W1, P/2007 VQ11, P/2007 T4, C/2007 M2, C/2007 D1, C/2007 B2, C/2006 W3, 2006 DU62, 2005 EK70, C/2002 VQ94, 183P, 179P, 108P, 74P, 70P
E12Siding Spring Survey (SSS) in New South Wales, 4 in MPECs 2008-D10, 2008-D11 & 2008-D12 -- 2008 CN70, 2008 CG119, 2006 RH120, P/2006 HR30
510Siegen Obs. in Germany, 1 in MPEC 2008-D10 -- 46P
H85Silver Spring Obs. in Maryland, 1 in MPEC 2008-D11 -- 2008 CP
B31Southern African Large Telescope in South Africa, 1 in MPEC 2008-D12 -- 2006 RH120
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2008-D12 -- 2006 RH120
A97Stammersdorf Obs. in Austria, 2 in MPECs 2008-D09 & 2008-D10 -- C/2008 C1, 17P
B30Szamotuly-Galowo Obs. in Poland, 12 in MPEC 2008-D10 -- P/2007 T6, C/2006 W3, C/2006 S5, 191P, 110P, 93P, 74P, 65P, 50P, 29P, 17P, 8P
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-D11 -- 2008 CE119
G72University Hills Obs. in southern California, 6 in MPEC 2008-D11 -- 2008 CR116, 2008 CN1, 2008 CL1, 2007 TU24, 2007 TG8, 2006 DU62
A48Verona Obs. in Italy, 1 in MPEC 2008-D10 -- 180P
H47Vicksburg Obs. in Mississippi, 2 in MPEC 2008-D10 -- 191P, 74P
138Village-Neuf Obs. in France, 1 in MPEC 2008-D10 -- 46P
B42Vitebsk Obs. in Belarus, 3 in MPEC 2008-D10 -- 93P, 50P, 46P
198Wildberg Obs. in Germany, 1 in MPEC 2008-D11 -- 2004 XP164
C42Xingming Obs. in China, 3 in MPECs 2008-D09 & 2008-D10 -- C/2008 C1, 46P, 29P

Impact Risk Monitoring  on 18 February '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2354 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) risk pages.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2008 CL116NEODyS1548207839.36e-08-4.69-4.930NEODyS: "Based on 57 optical observations (of which 0 are rejected as outliers) from 2008/02/10.407 to 2008/02/17.074."
2008 AF4NEODyS21592078-2089101.25e-05-2.57-2.650NEODyS: "Based on 547 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/02/18.021."

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.

Chronology  on 18 February '08

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

2159Noted that NEODyS has updated its 2008 AF4 risk assessment - see above
1548Noted that NEODyS has updated its 2008 CL116 risk assessment - see above
Grabbed MPEC 2008-D11 - Daily Orbit Update - see above
Grabbed MPEC 2008-D12 - 2006 RH120 - see above
0200Grabbed MPEC 2008-D06 - Comet C/2007 Y1 (LINEAR) - see above
Grabbed MPEC 2008-D07 - Comet C/2007 Y2 (McNaught) - see above
Grabbed MPEC 2008-D08 - Comet C/2008 A1 (McNaught) - see above
Grabbed MPEC 2008-D09 - Comet C/2008 C1 (Chen-Gao) - see above
Grabbed MPEC 2008-D10 - Observations of Comets - see above