Contents  on 17 April '08

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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 17 April '08

The MPC's NEO Confirmation Page has 2 listings: 1 new, 1 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and one updated listing. Both of these were "one nighters." The Tracking News counted a total of eleven objects listed on the NEOCP at some point on this day.

New MPECs  on 17 April '08

Minor Planet Electronic Circulars

There were five MPECs issued this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-H06 - "21:49 UT" - 2008 BT18


MPEC 2008-H05 - "14:35 UT" - Observations of Comets


MPEC 2008-H04 - "14:24 UT" - Comet C/2008 E3 (Garradd)


MPEC 2008-H03 - "14:17 UT" - Comet C/2008 C1 (Chen-Gao)


<< DOU on 17 Apr. '08 >>  MPEC 2008-H02 - "06:10 UT" - Daily Orbit Update

Observers  on 17 April '08

A total of 45 observing facilities appeared in this day's MPECs.

CodeObserver / observatory
H077300 Obs. in New Mexico, 1 in MPEC 2008-H05 -- C/2005 L3
834AAAA Buenos Aires Obs. in Argentina, 2 in MPEC 2008-H05 -- C/2007 W1, C/2006 Q1
349Ageo Obs. in Japan, 5 in MPEC 2008-H05 -- C/2007 N3, C/2007 M2, C/2006 W3, P/2005 SB216, 65P
H55Astronomical Research Obs. (ARO) in Illinois, 18 in MPEC 2008-H02 -- 2008 GX21, 2008 GV3, 2008 GU20, 2008 GS3, 2008 GP20, 2008 GO20, 2008 GL20, 2008 GD, 2008 GB4, 2008 GB21, 2008 GB110, 2008 GA4, 2008 FO, 2008 FC, 2008 EX84, 2008 EQ7, 2008 CZ118, 2008 BT18
J51Atlante Obs. in the Canary Islands, 2 in MPEC 2008-H05 -- C/2006 Q1, 180P
467Auckland Obs. in New Zealand, 14 in MPECs 2008-H04 & 2008-H05 -- C/2008 E3, C/2008 A1, C/2007 W1, C/2007 T1, C/2007 Q3, C/2007 N3, C/2007 D1, C/2007 B2, C/2006 U6, C/2006 S5, C/2006 Q1, C/2006 K4, 70P, 8P
B59Borken Obs. in Germany, 1 in MPEC 2008-H05 -- C/2007 M2
215Buchloe Obs. in Germany, 11 in MPECs 2008-H03 & 2008-H05 -- C/2008 C1, C/2007 T1, 197P, 187P, 110P, 93P, 74P, 50P, 46P, 22P, 17P
235CAST Obs. in Italy, 2 in MPEC 2008-H05 -- 187P, 22P
B20Carmelita Obs. in Spain, 2 in MPECs 2008-H03 & 2008-H05 -- C/2008 C1, 46P
703Catalina Sky Survey (CSS) in Arizona, 12 in MPECs 2008-H02 & 2008-H05 -- 2008 FN6, 2007 VY7, C/2007 B2, P/2005 SB216, C/2005 L3, 85236, 4954, 4544, 3554, 172P, 124P, 74P
B24Cesson Obs. in France, 1 in MPEC 2008-H05 -- 124P
A77Chante-Perdrix Obs. in France, 4 in MPECs 2008-H02 & 2008-H05 -- 9162, 46P, 29P, 17P
E85Farm Cove Obs., 3 in MPEC 2008-H05 -- C/2007 W1, C/2007 B2, C/2006 S5
372Geisei Obs. in Japan, 7 in MPECs 2008-H03 & 2008-H05 -- C/2008 C1, C/2007 B2, C/2006 Q1, 70P, 46P, 22P, 7P
H51Greiner Research Obs. (GRO) in Wisconsin, 5 in MPECs 2008-H02 & 2008-H05 -- 2008 GW20, 2008 GV3, 2008 FU6, C/2007 W1, 2005 NB7
415Kambah Obs. in the Australian Capital Territory, 2 in MPEC 2008-H05 -- C/2007 M3, C/2006 XA1
585Kiev Comet Station in the Ukraine, 4 in MPECs 2008-H03 & 2008-H05 -- C/2008 C1, 197P, 124P, 46P
704LINEAR in New Mexico, 13 in MPECs 2008-H02 & 2008-H05 -- 2008 BC22, C/2007 W1, C/2007 M3, C/2007 M2, C/2007 G1, 2001 HY7, 164202, 153591, 6456, 187P, 172P, 158P, 29P
J38La Vara Obs. in Spain, 4 in MPEC 2008-H05 -- C/2007 W1, C/2007 B2, 93P, 46P
844Los Molinos Obs. in Uruguay, 1 in MPEC 2008-H05 -- 124P
A02Masia Cal Maciarol Modul 8 in Spain, 1 in MPEC 2008-H05 -- 158P
232Masquefa Obs. in Spain, 7 in MPEC 2008-H05 -- C/2007 W1, C/2007 G1, C/2007 B2, C/2005 L3, 180P, 124P, 70P
A06Mataro Obs. in Spain, 3 in MPECs 2008-H03 & 2008-H05 -- C/2008 C1, 46P, 29P
152Moletai Obs. in Lithuania, 2 in MPECs 2008-H03 & 2008-H05 -- C/2008 C1, 46P
213Montcabre Obs. in Spain, 1 in MPEC 2008-H05 -- 46P
945Monte Deva Obs. in Spain, 3 in MPEC 2008-H05 -- C/2007 W1, C/2007 B2, C/2005 L3
900Moriyama Obs. in Japan, 5 in MPEC 2008-H05 -- C/2007 W1, C/2007 M2, C/2007 B2, 70P, 50P
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2008-H02 & 2008-H05 -- 2008 GH110, 2008 GD, 2008 FU6, C/2007 B2, C/2005 L3, 36183, 70P, 46P, 22P, 4P
566NEAT's GEODSS Haleakala telescope in Hawaii, 1 in MPEC 2008-H06 -- 2008 BT18
D81Nagano Obs., 1 in MPEC 2008-H05 -- 22P
J47Nazaret Obs. in Spain, 8 in MPECs 2008-H03 & 2008-H05 -- C/2008 C1, C/2007 W1, C/2006 S5, 180P, 158P, 70P, 29P, 17P
J29Nira Obs., 5 in MPECs 2008-H03 & 2008-H05 -- C/2008 C1, 110P, 93P, 46P, 29P
423North Ryde Obs. in New South Wales, 4 in MPECs 2008-H04 & 2008-H05 -- C/2008 E3, C/2008 A1, C/2006 K4, 8P
261&Rob Matson in southern California using the Palomar Digitized Sky Survey in southern California, 1 in MPEC 2008-H06 -- 2008 BT18
B49Paus Obs. in Spain, 1 in MPEC 2008-H05 -- 180P
H06RAS Obs. Mayhill in New Mexico, 2 in MPEC 2008-H05 -- C/2007 W1, C/2007 B2
939Rodeno Obs. in Spain, 1 in MPEC 2008-H05 -- 93P
204Schiaparelli Obs. in Italy, 8 in MPEC 2008-H05 -- C/2007 D1, P/2005 SB216, 197P, 180P, 158P, 124P, 22P, 4P
691Spacewatch 0.9m telescope in Arizona, 7 in MPECs 2008-H02 & 2008-H05 -- 2008 GZ3, 2008 GA4, 2008 FT6, C/2007 D1, 2006 KV86, 3757, 158P
A97Stammersdorf Obs. in Austria, 1 in MPEC 2008-H03 -- C/2008 C1
629Szeged Obs. in Hungary, 3 in MPECs 2008-H03 & 2008-H05 -- C/2008 C1, C/2007 W1, 46P
A92Urseanu Obs. in Romania, 1 in MPEC 2008-H05 -- C/2007 W1
J70Vega del Thader Obs. in Spain, 1 in MPEC 2008-H05 -- C/2007 W1
B42Vitebsk Obs. in Belarus, 9 in MPEC 2008-H05 -- C/2007 B2, C/2006 W3, C/2006 S5, C/2005 L3, 110P, 65P, 46P, 17P, 7P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 April '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2356 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 GH110JPL Sentry1422R E M O V E DJPL: Risk listing removed at 0944 UTC.
NEODyS1422R E M O V E D-

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 17 April '08

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

2356Grabbed MPEC 2008-H06 - 2008 BT18 - see above
1624Grabbed MPEC 2008-H03 - Comet C/2008 C1 (Chen-Gao) - see above
Grabbed MPEC 2008-H04 - Comet C/2008 E3 (Garradd) - see above
Grabbed MPEC 2008-H05 - Observations of Comets - see above
1423Grabbed MPEC 2008-H02 - Daily Orbit Update - see above
1422Noted that JPL Sentry has removed 2008 GH110 as an impact risk - see above
Noted that NEODyS has removed 2008 GH110 as an impact risk - see above