Contents  on 13 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 13 May '08

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

When last checked at 2354 UTC today, the Minor Planet Center's NEO 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 nine 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 13 May '08

Minor Planet Electronic Circulars

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


MPEC 2008-J69 - "17:22 UT" - Comet C/2008 J4 (McNaught)


MPEC 2008-J68 - "15:23 UT" - Comet P/2008 J2 (Beshore)


<< DOU on 13 May '08 >>  MPEC 2008-J67 - "06:07 UT" - Daily Orbit Update

Observers  on 13 May '08

A total of 33 observing facilities appear in today's MPECs.

CodeObserver / observatory
834AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2008-J68 -- P/2008 J2
349Ageo Obs. in Japan, 1 in MPEC 2008-J68 -- P/2008 J2
J24Altamira Obs., 1 in MPEC 2008-J68 -- P/2008 J2
H55Astronomical Research Obs. (ARO) in Illinois, 18 in MPEC 2008-J67 -- 2008 JZ7, 2008 JW19, 2008 JT19, 2008 JS19, 2008 JR14, 2008 JQ, 2008 JP, 2008 JN20, 2008 JM20, 2008 HH, 2008 GR3, 2008 GF, 2008 FW5, 2008 DY, 2008 CD22, 2007 XA23, 2006 SJ134, 2003 AA
J51Atlante Obs. in the Canary Islands, 3 in MPECs 2008-J67 & 2008-J68 -- P/2008 J2, 137170, 11398
703Catalina Sky Survey (CSS) in Arizona, 7 in MPEC 2008-J67 -- 2008 JO14, 68359, 35107, 11066, 5131, 4503, 1685
3091Andrea Boattini via Cerro Paranal in Chile, 1 in MPEC 2008-J67 -- 2007 HX3
8071Marc W. Buie via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2008-J67 -- 2007 RR12
113Drebach Obs. in Germany, 11 in MPEC 2008-J67 -- 2008 JU2, 2008 JP14, 2008 JN20, 2008 JM20, 2008 JJ, 2008 HF2, 2008 FN, 2008 EC69, 2007 VQ4, 2005 NB7, 35107
246KLENOT in the Czech Republic, 1 in MPEC 2008-J68 -- P/2008 J2
682Kanab Obs. in Utah, 1 in MPEC 2008-J68 -- P/2008 J2
704LINEAR in New Mexico, 1 in MPEC 2008-J67 -- 5836
699LONEOS in Arizona, 4 in MPEC 2008-J67 -- 2008 HA38, 85770, 6611, 2340
809La Silla in Chile, 1 in MPEC 2008-J68 -- P/2008 J2
J40Malaga Obs. in Spain, 1 in MPEC 2008-J68 -- P/2008 J2
B67Mirasteilas Obs. in Switzerland, 4 in MPEC 2008-J67 -- 2008 ED69, 2008 BT18, 2005 NB7, 85818
118Modra Obs. in Slovakia, 1 in MPEC 2008-J68 -- P/2008 J2
945Monte Deva Obs. in Spain, 1 in MPEC 2008-J68 -- P/2008 J2
474Mt. John Obs. in New Zealand, 2 in MPEC 2008-J67 -- 2008 JP24, 2008 JL24
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2008-J67 -- 2003 AD1, 152964, 143637
644NEAT's Mt. Palomar telescope in southern California, 2 in MPEC 2008-J67 -- 2008 EZ5, 2008 CQ1
J47Nazaret Obs. in Spain, 1 in MPEC 2008-J68 -- P/2008 J2
423North Ryde Obs. in New South Wales, 1 in MPEC 2008-J68 -- P/2008 J2
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2008-J67 -- 2008 ED69, 2008 EC69, 2005 TU45, 2003 KO2, 35107
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2008-J68 -- P/2008 J2
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2008-J68 -- P/2008 J2
E12Siding Spring Survey (SSS) in New South Wales, 7 in MPECs 2008-J67 & 2008-J69 -- C/2008 J4, 2001 QC34, 96631, 39572, 162723, 153591, 6611
645Sloan Digital Sky Survey (SDSS) in New Mexico, 5 in MPEC 2008-J67 -- 85709, 67399, 16816, 10115, 6455
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2008-J67 -- 2007 TW68, 2368
291Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2008-J67 -- 2008 JT19, 2008 JL24, 2006 UP, 2004 RC11, 2004 JN2
A97Stammersdorf Obs. in Austria, 1 in MPEC 2008-J68 -- P/2008 J2
F85Tiki Obs. in Tahiti, 1 in MPEC 2008-J69 -- C/2008 J4
367Yatsuka Obs., 1 in MPEC 2008-J68 -- P/2008 J2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 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 JL24NEODyS1605206811.69e-08-10.23-10.230NEODyS: "Based on 47 optical observations (of which 0 are rejected as outliers) from 2008/05/11.254 to 2008/05/13.212."
JPL Sentry1333209116.3e-07-8.80-8.800JPL: "Analysis based on 47 observations spanning 1.9572 days (2008-May-11.25353 to 2008-May-13.21077)." Diameter approximately 0.004 km. from mean, weighted H=29.5.
2008 JQJPL Sentry1333210112.1e-08-8.30-8.300JPL: "Analysis based on 42 observations spanning 7.9563 days (2008-May-02.30115 to 2008-May-10.257429)." Diameter approximately 0.027 km. from mean, weighted H=25.5.
2008 HO3JPL Sentry0022R E M O V E DJPL: Risk listing removed at 0015 UTC.
2008 HE3JPL Sentry0110R E M O V E DJPL: Risk listing removed at 0024 UTC.
2007 HX3NEODyS1459R E M O V E D-
JPL Sentry1333R E M O V E DJPL: Risk listing removed at 1025 UTC.

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 13 May '08

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

1746Grabbed MPEC 2008-J69 - Comet C/2008 J4 (McNaught) - see above
1604Noted that NEODyS has posted 2008 JL24 as an impact risk - see above
Grabbed MPEC 2008-J68 - Comet P/2008 J2 (Beshore) - see above
1459Noted that NEODyS has removed 2007 HX3 as an impact risk - see above
1333Noted that JPL Sentry has removed 2007 HX3 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 JL24 risk assessment - see above
Noted that JPL Sentry has reposted 2008 JQ as an impact risk - see above
Grabbed MPEC 2008-J67 - Daily Orbit Update - see above
0110Noted that JPL Sentry has removed 2008 HE3 as an impact risk - see above
0022Noted that JPL Sentry has removed 2008 HO3 as an impact risk - see above