Contents  on 12 May '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 12 May '08

The MPC's NEO Confirmation Page has 4 listings: 2 new, 2 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new and two updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of twelve objects listed on the NEOCP at some point today.

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 12 May '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-J66 - "21:35 UT" - 2007 OC10


MPEC 2008-J65 - "19:10 UT" - 2008 AL33


MPEC 2008-J64 - "18:04 UT" - Comet C/2008 J3 (McNaught)


MPEC 2008-J63 - "16:33 UT" - 2008 JP24


MPEC 2008-J62 - "16:28 UT" - 2008 JO24


MPEC 2008-J61 - "15:47 UT" - 2008 JL24


<< DOU on 12 May '08 >>  MPEC 2008-J60 - "06:07 UT" - Daily Orbit Update

Observers  on 12 May '08

A total of 28 observing facilities appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 4 in MPECs 2008-J60 & 2008-J61 -- 2008 JW19, 2008 JQ14, 2008 JO20, 2008 JL24
A44Altschwendt Obs. in Austria, 1 in MPEC 2008-J60 -- 2008 FN6
H55Astronomical Research Obs. (ARO) in Illinois, 13 in MPECs 2008-J60 & 2008-J63 -- 2008 JZ7, 2008 JW19, 2008 JS19, 2008 JQ14, 2008 JP24, 2008 JO, 2008 JG, 2008 GV3, 2008 EQ7, 2008 EO6, 2008 EB32, 2001 XW266, 1998 KG3
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2008-J60 -- 137170
300Bisei Spaceguard Center in Japan, 2 in MPEC 2008-J60 -- 2008 JN20, 2008 JM20
I77CEAMIG-REA in Brazil, 1 in MPEC 2008-J63 -- 2008 JP24
703Catalina Sky Survey (CSS) in Arizona, 4 in MPEC 2008-J60 -- 2008 HV4, 2007 VR183, 2004 XN44, 5626
A94Cormons Obs. in Italy, 2 in MPEC 2008-J60 -- 2008 JN20, 2008 HW1
113Drebach Obs. in Germany, 4 in MPECs 2008-J60 & 2008-J63 -- 2008 JU2, 2008 JP24, 2007 VQ4, 2005 NB7
651Grasslands Obs. in Arizona, 2 in MPECs 2008-J60 & 2008-J63 -- 2008 JP24, 2008 JO20
J95Great Shefford Obs. in England, 1 in MPEC 2008-J61 -- 2008 JL24
A17Guidestar Obs. in Germany, 1 in MPEC 2008-J62 -- 2008 JO24
6951Marc W. Buie via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2008-J65 -- 2008 AL33
704LINEAR in New Mexico, 4 in MPECs 2008-J60 & 2008-J61 -- 2008 JL24, 2008 HF2, 2008 DE, 163693
560Madonna di Dossobuono Obs. in Italy, 4 in MPEC 2008-J60 -- 2008 JS19, 2008 JN, 2008 HS3, 2008 GO20
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2008-J60 -- 2008 JO20
474Mt. John Obs. in New Zealand, 7 in MPECs 2008-J60, 2008-J61, 2008-J63 & 2008-J64 -- 2008 JW19, 2008 JP24, 2008 JL24, C/2008 J3, 2006 GQ2, 2004 GA1, 2004 CD39
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2008-J60 & 2008-J62 -- 2008 JO24, 2008 JO20, 2008 FN, 2007 VR183, 10145, 5836
675Mt. Palomar in southern California, 1 in MPEC 2008-J66 -- 2007 OC10
473Remanzacco Obs. in Italy, 1 in MPEC 2008-J60 -- 2008 HW1
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2008-J61 -- 2008 JL24
204Schiaparelli Obs. in Italy, 1 in MPEC 2008-J60 -- 2008 JO20
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2008-J60, 2008-J63 & 2008-J64 -- 2008 JP24, C/2008 J3, 162723
291Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2008-J60 & 2008-J65 -- 2008 JT19, 2008 HU4, 2008 HO3, 2008 HE3, 2008 HB38, 2008 GA110, 2008 FW6, 2008 CB22, 2008 AL33
A78Stia Obs. in Italy, 1 in MPEC 2008-J60 -- 2008 JU2
F85Tiki Obs. in Tahiti, 4 in MPECs 2008-J60, 2008-J61, 2008-J63 & 2008-J64 -- 2008 JS19, 2008 JP24, 2008 JL24, C/2008 J3
H83Timberlake Obs. in Virginia, 1 in MPEC 2008-J60 -- 1866
198Wildberg Obs. in Germany, 3 in MPEC 2008-J60 -- 2005 XE1, 2003 KO2, 1999 FA
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 May '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 JL24JPL Sentry1834209113.1e-07-9.10-9.100JPL: "Analysis based on 39 observations spanning 1.2199 days (2008-May-11.25353 to 2008-May-12.47344)." Diameter approximately 0.004 km. from mean, weighted H=29.4.
2008 JL3JPL Sentry23542024-2100161.2e-04-3.77-3.780JPL: "Analysis based on 29 observations spanning 4.0954 days (2008-May-05.35106 to 2008-May-09.44647)." Diameter approximately 0.029 km. from mean, weighted H=25.3.
2008 JQJPL Sentry2258R E M O V E DJPL: Risk listing removed at 2220 UTC.
2008 JPJPL Sentry2354R E M O V E DJPL: Risk listing removed at 2344 UTC.
2008 HC38JPL Sentry2043202914.8e-08-7.40-7.400JPL: "Analysis based on 32 observations spanning 8.0249 days (2008-Apr-30.29803 to 2008-May-08.32293)." Diameter approximately 0.020 km. from mean, weighted H=26.1.
2008 HB38JPL Sentry2320R E M O V E DJPL: Risk listing removed at 2301 UTC.
2008 HU4JPL Sentry16362040-2086103.0e-04-5.57-5.880JPL: "Analysis based on 43 observations spanning 10.997 days (2008-Apr-30.32444 to 2008-May-11.3218)." Diameter approximately 0.007 km. from mean, weighted H=28.3.
NEODyS15022040-2089183.91e-04-5.45-5.720NEODyS: "Based on 43 optical observations (of which 0 are rejected as outliers) from 2008/04/30.325 to 2008/05/11.323."
2008 HR3JPL Sentry2043R E M O V E DJPL: Risk listing removed at 2039 UTC.
2008 HJJPL Sentry17482077-2106182.2e-04-4.39-4.850JPL: "Analysis based on 78 observations spanning 6.1293 days (2008-Apr-24.24725 to 2008-Apr-30.376536)." Diameter approximately 0.024 km. from mean, weighted H=25.7.
2006 SF281JPL Sentry20432009-21053482.2e-06-5.44-6.600JPL: "Analysis based on 16 observations spanning .02717 days (2006-Sep-30.48927 to 2006-Sep-30.51644)." Diameter approximately 0.020 km. from mean, weighted H=26.2.

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 12 May '08

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

2354Noted that JPL Sentry has posted 2008 JL3 as an impact risk - see above
Noted that JPL Sentry has removed 2008 JP as an impact risk - see above
2320Noted that JPL Sentry has removed 2008 HB38 as an impact risk - see above
2258Noted that JPL Sentry has removed 2008 JQ as an impact risk - see above
2201Grabbed MPEC 2008-J66 - 2007 OC10 - see above
2043Noted that JPL Sentry has updated its 2006 SF281 risk assessment - see above
Noted that JPL Sentry has updated its 2008 HC38 risk assessment - see above
Noted that JPL Sentry has removed 2008 HR3 as an impact risk - see above
Grabbed MPEC 2008-J65 - 2008 AL33 - see above
1903Grabbed MPEC 2008-J64 - Comet C/2008 J3 (McNaught) - see above
1834Noted that JPL Sentry has posted 2008 JL24 as an impact risk - see above
1748Noted that JPL Sentry has updated its 2008 HJ risk assessment - see above
1636Noted that JPL Sentry has updated its 2008 HU4 risk assessment - see above
Grabbed MPEC 2008-J62 - 2008 JO24 - see above
Grabbed MPEC 2008-J63 - 2008 JP24 - see above
1600Grabbed MPEC 2008-J61 - 2008 JL24 - see above
1502Noted that NEODyS has updated its 2008 HU4 risk assessment - see above
1501Grabbed MPEC 2008-J60 - Daily Orbit Update - see above