Contents  on 18 April '09

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 April '09

The MPC's NEO Confirmation Page has 5 listings: 2 new, 3 updated

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

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

New MPECs  on 18 April '09

Minor Planet Electronic Circulars

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


MPEC 2009-H16 - "17:57 UT" - 1990 UA = 2009 FJ44


MPEC 2009-H15 - "15:19 UT" - Observations of Comets


MPEC 2009-H14 - "15:06 UT" - Comet C/2009 G1 (STEREO)


MPEC 2009-H13 - "15:01 UT" - Comet C/2009 F6 (Yi-SWAN)


MPEC 2009-H12 - "14:57 UT" - Comet C/2009 F5 (McNaught)


MPEC 2009-H11 - "14:53 UT" - Comet C/2009 F4 (McNaught)


MPEC 2009-H10 - "14:50 UT" - Comet C/2009 F2 (McNaught)


MPEC 2009-H09 - "13:37 UT" - 2009 HG


MPEC 2009-H08 - "13:34 UT" - 2009 HF


MPEC 2009-H07 - "13:31 UT" - 2009 HE


MPEC 2009-H06 - "13:28 UT" - 2009 HD


MPEC 2009-H05 - "13:25 UT" - 2009 HC


<< DOU on 18 Apr. '09 >>  MPEC 2009-H04 - "06:06 UT" - Daily Orbit Update

Observers  on 18 April '09

A total of 67 observing facilities appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 18 in MPECs 2009-H12, 2009-H13, 2009-H14 & 2009-H15 -- C/2009 G1, C/2009 F6, C/2009 F5, C/2009 B2, P/2008 Y2, C/2008 T2, C/2007 Q3, C/2007 D1, C/2006 W3, C/2006 U6, C/2006 Q1, C/2006 OF2, 210P, 209P, 144P, 67P, 22P, 19P
H55Astronomical Research Obs. (ARO) in Illinois, 31 in MPECs 2009-H04, 2009-H05, 2009-H07, 2009-H08 & 2009-H09 -- 2009 HG, 2009 HF, 2009 HE, 2009 HC, 2009 FY29, 2009 FP29, 2009 FL25, 2009 FJ44, 2009 FJ30, 2009 FJ, 2009 FH44, 2009 EQ2, 2009 ED1, 2009 DZ42, 2009 DN1, 2009 DF1, 2009 DE47, 2009 CZ2, 2009 CR4, 2009 CO5, 2008 YR2, 2008 WL60, 2008 UV91, 2008 TQ2, 2008 SW150, 2008 OB9, 2005 SA71, 2005 EJ94, 2003 OU, 2000 TG2, 1999 GY5
J51Atlante Obs. in the Canary Islands, 3 in MPEC 2009-H15 -- 143P, 77P, 65P
467Auckland Obs. in New Zealand, 4 in MPEC 2009-H15 -- C/2007 Q3, C/2007 N3, C/2007 G1, C/2007 B2
A81Balzaretto Obs. in Italy, 2 in MPEC 2009-H15 -- 74P, 65P
I32Beta Orionis Obs. in Argentina, 5 in MPECs 2009-H12 & 2009-H15 -- C/2009 F5, C/2007 G1, 144P, 116P, 74P
127Bornheim Obs. in Germany, 1 in MPEC 2009-H15 -- C/2007 N3
215Buchloe Obs. in Germany, 7 in MPEC 2009-H15 -- C/2008 T2, C/2007 N3, C/2006 OF2, 144P, 116P, 77P, 65P
670Camarillo Obs. in southern California, 1 in MPEC 2009-H05 -- 2009 HC
B20Carmelita Obs. in Spain, 3 in MPEC 2009-H15 -- 116P, 77P, 65P
160Castelmartini Obs. in Italy, 3 in MPEC 2009-H15 -- C/2008 T2, C/2007 N3, C/2006 OF2
703Catalina Sky Survey (CSS) in Arizona, 15 in MPECs 2009-H04 & 2009-H08 -- 2009 HF, 2009 FY29, 2008 SW150, 2008 SV11, 2006 WZ2, 2004 FU64, 2003 UN12, 2000 KN44, 39557, 207945, 177614, 155334, 5693, 3554, 719
A77Chante-Perdrix Obs. in France, 1 in MPEC 2009-H15 -- 204P
850Cordell-Lorenz Obs. in Tennessee, 2 in MPECs 2009-H05 & 2009-H06 -- 2009 HD, 2009 HC
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 2 in MPEC 2009-H04 -- 2009 FJ30, 2008 SV11
I21El Condor Obs. in Argentina, 4 in MPECs 2009-H04 & 2009-H15 -- 2009 FJ30, C/2007 Q3, 116P, 22P
J19El Maestrat Obs. in Spain, 1 in MPEC 2009-H15 -- 116P
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 3 in MPECs 2009-H13 & 2009-H15 -- C/2009 F6, P/2008 Y2, C/2008 Q1
E85Farm Cove Obs. in New Zealand, 3 in MPECs 2009-H11, 2009-H12 & 2009-H15 -- C/2009 F5, C/2009 F4, C/2008 FK75
E94Gisborne Obs. in New Zealand, 2 in MPECs 2009-H12 & 2009-H14 -- C/2009 G1, C/2009 F5
651Grasslands Obs. in Arizona, 5 in MPECs 2009-H05, 2009-H06, 2009-H07, 2009-H08 & 2009-H09 -- 2009 HG, 2009 HF, 2009 HE, 2009 HD, 2009 HC
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2009-H15 -- C/2007 G1
442Gualba Obs. in Spain, 2 in MPEC 2009-H15 -- C/2007 N3, 29P
A17Guidestar Obs. in Germany, 1 in MPEC 2009-H15 -- C/2006 Q1
379Hamamatsu-Yuto Obs. in Japan, 7 in MPEC 2009-H15 -- C/2008 T2, C/2008 Q1, C/2007 N3, C/2006 Q1, C/2005 L3, 144P, 116P
A91Hankasalmi Obs., 1 in MPEC 2009-H13 -- C/2009 F6
H25Harvest Moon Obs., 1 in MPEC 2009-H04 -- 2009 DO111
196Homburg-Erbach Obs. in Germany, 5 in MPECs 2009-H04 & 2009-H15 -- C/2005 L3, 138883, 3103, 77P, 65P
J39Ingenio Obs. in the Canary Islands, 4 in MPEC 2009-H15 -- C/2007 N3, C/2006 OF2, 116P, 29P
857Iowa Robotic Obs. in Arizona, 1 in MPEC 2009-H15 -- P/2009 F7
987Isle of Man Obs. on the Isle of Man, 3 in MPECs 2009-H13 & 2009-H15 -- C/2009 F6, C/2008 T2, C/2007 N3
D32JiangNanTianChi Obs. in China, 2 in MPEC 2009-H15 -- 144P, 29P
415Kambah Obs. in the Australian Capital Territory, 1 in MPEC 2009-H15 -- P/2009 F7
585Kiev Comet Station in the Ukraine, 5 in MPECs 2009-H11, 2009-H12, 2009-H13 & 2009-H15 -- C/2009 F6, C/2009 F5, C/2009 F4, 29P, 22P
704LINEAR in New Mexico, 7 in MPECs 2009-H04, 2009-H06 & 2009-H15 -- 2009 HD, C/2007 D3, 2007 BT2, 138883, 210P, 88P, 77P
J38La Vara Obs. in Spain, 9 in MPEC 2009-H15 -- C/2008 T2, C/2007 N3, C/2006 OF2, 144P, 88P, 77P, 74P, 67P, 29P
I36Los Campitos Obs. in Argentina, 6 in MPEC 2009-H15 -- C/2007 Q3, C/2007 G1, C/2007 B2, 144P, 116P, 22P
B82Maidbronn Obs. in Germany, 9 in MPECs 2009-H13 & 2009-H15 -- C/2009 F6, C/2008 T2, C/2008 A1, C/2007 N3, C/2006 OF2, 144P, 116P, 29P, 19P
J40Malaga Obs. in Spain, 9 in MPEC 2009-H15 -- C/2008 FK75, 144P, 143P, 116P, 88P, 67P, 65P, 29P, 19P
232Masquefa Obs. in Spain, 4 in MPEC 2009-H15 -- C/2006 Q1, C/2005 L3, 77P, 65P
213Montcabre Obs. in Spain, 8 in MPECs 2009-H11, 2009-H12, 2009-H13 & 2009-H15 -- P/2009 F7, C/2009 F6, C/2009 F5, C/2009 F4, C/2007 N3, 67P, 29P, 19P
945Monte Deva Obs. in Spain, 10 in MPECs 2009-H13 & 2009-H15 -- C/2009 F6, C/2008 T2, C/2007 N3, C/2006 Q1, C/2006 OF2, C/2005 L3, 144P, 116P, 67P, 65P
900Moriyama Obs. in Japan, 10 in MPEC 2009-H15 -- C/2008 T2, C/2008 A1, C/2007 Q3, C/2007 N3, C/2006 OF2, 144P, 116P, 74P, 67P, 29P
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2009-H04, 2009-H07, 2009-H08, 2009-H15 & 2009-H16 -- 2009 HF, 2009 HE, 1990 UA, 159635, 154993, 5620, 210P
A13Naef Obs. in Switzerland, 1 in MPEC 2009-H15 -- 210P
J47Nazaret Obs. in Spain, 13 in MPEC 2009-H15 -- P/2009 F7, C/2008 T2, C/2007 N3, C/2006 U6, C/2006 OF2, C/2005 L3, 144P, 116P, 88P, 74P, 67P, 29P, 19P
423North Ryde Obs. in New South Wales, 4 in MPECs 2009-H10, 2009-H11, 2009-H12 & 2009-H15 -- C/2009 F5, C/2009 F4, C/2009 F2, C/2007 G1
A32Panker Obs. in Germany, 13 in MPEC 2009-H15 -- C/2008 T2, C/2008 A1, C/2007 N3, C/2006 OF2, C/2005 L3, 144P, 116P, 77P, 74P, 67P, 65P, 29P, 19P
B49Paus Obs. in Spain, 2 in MPEC 2009-H15 -- C/2005 L3, 19P
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2009-H15 -- C/2009 B2, P/2008 Y2, C/2007 N3, 144P, 74P, 29P
D29Purple Mtn. Obs. XuYi Station (XuYi Sta.) in China, 2 in MPEC 2009-H15 -- C/2007 N3, 88P
H06RAS Obs. Mayhill in New Mexico, 3 in MPECs 2009-H13 & 2009-H15 -- P/2009 F7, C/2009 F6, C/2006 W3
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-H05 -- 2009 HC
D90RAS Obs. Moorook in South Australia, 1 in MPEC 2009-H14 -- C/2009 G1
473Remanzacco Obs. in Italy, 1 in MPEC 2009-H15 -- C/2009 B2
939Rodeno Obs. in Spain, 10 in MPEC 2009-H15 -- C/2008 T2, C/2007 N3, C/2006 Q1, C/2005 L3, 144P, 116P, 77P, 74P, 65P, 29P
461SZTE Asteroid Program (SZTE) in Hungary, 4 in MPECs 2009-H05 & 2009-H15 -- 2009 HC, C/2007 N3, C/2007 D1, C/2002 VQ94
B70Sant Celoni Obs. in Spain, 1 in MPEC 2009-H15 -- C/2008 Q1
204Schiaparelli Obs. in Italy, 14 in MPECs 2009-H12, 2009-H13, 2009-H14 & 2009-H15 -- C/2009 G1, C/2009 F6, C/2009 F5, C/2008 Q1, C/2008 A1, C/2007 D3, C/2006 W3, C/2006 U6, C/2006 Q1, C/2002 VQ94, 210P, 183P, 143P, 77P
E12Siding Spring Survey (SSS) in New South Wales, 6 in MPECs 2009-H04, 2009-H09, 2009-H10, 2009-H12 & 2009-H15 -- 2009 HG, 2009 FP28, C/2009 F5, C/2009 F2, 2008 YR2, 183P
510Siegen Obs. in Germany, 4 in MPECs 2009-H13 & 2009-H15 -- C/2009 F6, C/2008 Q1, C/2005 L3, 65P
071Smolyan Obs. in Bulgaria, 10 in MPECs 2009-H04 & 2009-H15 -- C/2007 N3, C/2006 W3, C/2006 OF2, 89355, 22771, 162900, 152931, 144P, 67P, 29P
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2009-H05 & 2009-H15 -- 2009 HC, P/2008 CL94
291Spacewatch 1.8m telescope in Arizona, 15 in MPECs 2009-H04, 2009-H05, 2009-H07 & 2009-H15 -- 2009 HE, 2009 HC, 2009 FY10, 2009 FF19, 2009 FF, 2009 EF3, 2009 DZ42, 2009 CB3, P/2008 Y2, 2008 XE2, C/2007 N3, 2003 WO7, 2000 QK130, 216P, 204P
A97Stammersdorf Obs. in Austria, 3 in MPEC 2009-H15 -- C/2008 T2, C/2006 OF2, 144P
H53Thompsonville Obs. in Illinois, 2 in MPEC 2009-H04 -- 175706, 3554
B42Vitebsk Obs. in Belarus, 2 in MPEC 2009-H15 -- 116P, 74P
367Yatsuka Obs. in Japan, 8 in MPECs 2009-H13, 2009-H14 & 2009-H15 -- C/2009 G1, C/2009 F6, C/2007 N3, C/2006 W3, 209P, 144P, 67P, 29P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 18 April '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 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.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few objects.
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
2009 HEJPL Sentry15202022-2103257.2e-09-5.40-6.040JPL: "Analysis based on 21 observations spanning .96937 days (2009-Apr-17.30454 to 2009-Apr-18.27391)." Diameter approximately 0.267 km. from mean, weighted H=20.5.
2009 HCJPL Sentry15202093-209685.2e-07-6.68-7.090JPL: "Analysis based on 37 observations spanning 1.1487 days (2009-Apr-17.23164 to 2009-Apr-18.3803)." Diameter approximately 0.036 km. from mean, weighted H=24.9.
2009 FJNEODyS15212058-208842.38e-05-4.65-4.670NEODyS: "Based on 131 optical observations (of which 7 are rejected as outliers) from 2009/03/17.245 to 2009/04/17.274."
JPL Sentry15202058-2107102.4e-05-4.64-4.670JPL: "Analysis based on 124 observations spanning 30.964 days (2009-Mar-17.30916 to 2009-Apr-17.27361)." Diameter approximately 0.036 km. from mean, weighted H=24.9.

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 April '09

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

1801Grabbed MPEC 2009-H16 - 1990 UA = 2009 FJ44 - see above
1549Grabbed MPEC 2009-H15 - Observations of Comets - see above
1521Noted that NEODyS has updated its 2009 FJ risk assessment - see above
Grabbed MPEC 2009-H04 - Daily Orbit Update - see above
Grabbed MPEC 2009-H05 - 2009 HC - see above
Grabbed MPEC 2009-H06 - 2009 HD - see above
Grabbed MPEC 2009-H07 - 2009 HE - see above
Grabbed MPEC 2009-H08 - 2009 HF - see above
Grabbed MPEC 2009-H09 - 2009 HG - see above
Grabbed MPEC 2009-H10 - Comet C/2009 F2 (McNaught) - see above
Grabbed MPEC 2009-H12 - Comet C/2009 F5 (McNaught) - see above
Grabbed MPEC 2009-H13 - Comet C/2009 F6 (Yi-SWAN) - see above
Grabbed MPEC 2009-H14 - Comet C/2009 G1 (STEREO) - see above
1520Noted that JPL Sentry has updated its 2009 FJ risk assessment - see above
Noted that JPL Sentry has posted 2009 HC as an impact risk - see above
Noted that JPL Sentry has posted 2009 HE as an impact risk - see above
Grabbed MPEC 2009-H11 - Comet C/2009 F4 (McNaught) - see above