Contents  on 29 May '08


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 29 May '08

The MPC's NEO Confirmation Page has 9 listings: 3 new, 6 updated

When last checked at 2153 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and six updated listings. All of these 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 29 May '08

Minor Planet Electronic Circulars

As of last check at 2153 UTC, there have been seven MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-K56 - "19:17 UT" - Comet C/2008 J6 (Hill)

MPEC 2008-K55 - "19:12 UT" - Comet C/2008 J5 (Garradd)

MPEC 2008-K54 - "19:07 UT" - Comet P/2008 J3 (McNaught)

MPEC 2008-K53 - "13:53 UT" - 2008 KX2

MPEC 2008-K52 - "13:50 UT" - 2008 KW2

MPEC 2008-K51 - "13:43 UT" - 2008 KV2

<< DOU on 29 May '08 >>  MPEC 2008-K50 - "06:07 UT" - Daily Orbit Update

Observers  on 29 May '08

A total of 20 observing facilities appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2008-K56 -- C/2008 J6
467Auckland Obs. in New Zealand, 2 in MPECs 2008-K54 & 2008-K55 -- C/2008 J5, P/2008 J3
448Desert Moon Obs. in New Mexico, 4 in MPEC 2008-K50 -- 2008 JO20, 2008 HV4, 2008 GX, 2008 DY
E85Farm Cove Obs., 1 in MPEC 2008-K55 -- C/2008 J5
701Junk Bond Obs. in Arizona, 1 in MPEC 2008-K50 -- 2008 KQ
415Kambah Obs. in the Australian Capital Territory, 2 in MPECs 2008-K54 & 2008-K55 -- C/2008 J5, P/2008 J3
704LINEAR in New Mexico, 8 in MPECs 2008-K50, 2008-K51 & 2008-K52 -- 2008 KW2, 2008 KV2, 2008 JP14, 2008 HS3, 2005 NZ6, 96631, 69230, 1864
932McCarthy Obs. in Connecticut, 1 in MPEC 2008-K51 -- 2008 KV2
118Modra Obs. in Slovakia, 1 in MPEC 2008-K56 -- C/2008 J6
900Moriyama Obs. in Japan, 1 in MPEC 2008-K56 -- C/2008 J6
474Mt. John Obs. in New Zealand, 5 in MPECs 2008-K50, 2008-K51, 2008-K52, 2008-K53 & 2008-K54 -- 2008 KX2, 2008 KW2, 2008 KV2, P/2008 J3, 2008 FK7
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2008-K50 & 2008-K53 -- 2008 KX2, 2007 PP6, 2004 XM29, 2004 FU4, 86878
A13Naef Obs. in Switzerland, 1 in MPEC 2008-K50 -- 2008 JJ
423North Ryde Obs. in New South Wales, 1 in MPEC 2008-K55 -- C/2008 J5
557Ondrejov Obs. in the Czech Republic, 1 in MPEC 2008-K50 -- 2005 NB7
H59Prairie Grass Obs. in Indiana, 1 in MPEC 2008-K51 -- 2008 KV2
854Sabino Canyon Obs. in Arizona, 2 in MPECs 2008-K51 & 2008-K52 -- 2008 KW2, 2008 KV2
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2008-K50 -- 2004 XM29
673Table Mtn. Obs. in southern California, 1 in MPEC 2008-K56 -- C/2008 J6
6735Jim Young via Table Mtn. Obs. in southern California, 2 in MPECs 2008-K51 & 2008-K52 -- 2008 KW2, 2008 KV2
F85Tiki Obs. in Tahiti, 4 in MPECs 2008-K50, 2008-K54 & 2008-K55 -- 2008 JY30, 2008 JW2, C/2008 J5, P/2008 J3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 May '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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.





Notes for Today's Latest Risk Assessments
2008 KX2JPL Sentry17122031-2090152.6e-08-7.61-8.180JPL: "Analysis based on 11 observations spanning .16005 days (2008-May-29.26495 to 2008-May-29.425)." Diameter approximately 0.040 km. from mean, weighted H=24.6.
2008 KTNEODyS17132019-2090565.33e-05-6.07-6.610NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2008/05/28.255 to 2008/05/28.538."
2004 XM29JPL Sentry1355R E M O V E DJPL: Risk listing removed at 0859 UTC.
NEODyS1355R 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 29 May '08

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

2018Grabbed MPEC 2008-K54 - Comet P/2008 J3 (McNaught) - see above
Grabbed MPEC 2008-K55 - Comet C/2008 J5 (Garradd) - see above
Grabbed MPEC 2008-K56 - Comet C/2008 J6 (Hill) - see above
1712Noted that NEODyS has posted 2008 KT as an impact risk - see above
Noted that JPL Sentry has posted 2008 KX2 as an impact risk - see above
1355Noted that JPL Sentry has removed 2004 XM29 as an impact risk - see above
Noted that NEODyS has removed 2004 XM29 as an impact risk - see above
Grabbed MPEC 2008-K50 - Daily Orbit Update - see above
Grabbed MPEC 2008-K51 - 2008 KV2 - see above
Grabbed MPEC 2008-K52 - 2008 KW2 - see above
Grabbed MPEC 2008-K53 - 2008 KX2 - see above