Contents  on 1 May '08


NOTE: The Tracking News and this Web site will be updating less often, and at sometimes irregular intervals, until around May 4th.

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 1 May '08

The MPC's NEO Confirmation Page has 12 listings: 2 new, 10 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new and ten updated listings. Of these, six were "one nighters." So far The Tracking News has counted a total of 22 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 1 May '08

Minor Planet Electronic Circulars

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

MPEC 2008-J06 - "21:30 UT" - 2008 JC

MPEC 2008-J05 - "19:17 UT" - 2008 HV4

MPEC 2008-J04 - "19:14 UT" - 2008 HU4

MPEC 2008-J03 - "19:08 UT" - 2008 HT4

MPEC 2008-J02 - "12:27 UT" - 2008 HO3

<< DOU on 1 May '08 >>  MPEC 2008-J01 - "06:07 UT" - Daily Orbit Update

Observers  on 1 May '08

Nineteen observing facilities appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 3 in MPEC 2008-J01 -- 2008 HS3, 2008 HJ3, 2008 HE2
A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2008-J01 -- 24445
H55Astronomical Research Obs. (ARO) in Illinois, 11 in MPECs 2008-J01, 2008-J02 & 2008-J05 -- 2008 HV4, 2008 HR3, 2008 HO3, 2008 HK, 2008 HJ, 2008 HH, 2008 CJ70, 2007 VR183, 2005 SE71, 2005 FE3, 2004 JG6
A81Balzaretto Obs. in Italy, 1 in MPEC 2008-J01 -- 2008 HS3
703Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2008-J01, 2008-J04 & 2008-J06 -- 2008 JC, 2008 HU4, 2008 CP23, 2008 BC22, 2007 VR183, 2004 JG6
176Consell Obs. in Spain, 1 in MPEC 2008-J05 -- 2008 HV4
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2008-J05 -- 2008 HV4
448Desert Moon Obs. in New Mexico, 4 in MPEC 2008-J01 -- 2008 GB110, 2008 ES, 2008 EQ7, 144861
J95Great Shefford Obs. in England, 1 in MPEC 2008-J06 -- 2008 JC
H51Greiner Research Obs. (GRO) in Wisconsin, 3 in MPEC 2008-J01 -- 2008 HW1, 2008 HG, 2005 NB7
B19Iluro Obs. in Spain, 1 in MPEC 2008-J01 -- 102873
704LINEAR in New Mexico, 8 in MPEC 2008-J01 -- 2008 HD3, 2008 FN6, 2008 AE, 2001 HY7, 85628, 68278, 7350, 4954
232Masquefa Obs. in Spain, 1 in MPEC 2008-J01 -- 2008 HW1
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-J01 -- 2005 AH14
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2008-J01, 2008-J02, 2008-J03 & 2008-J05 -- 2008 HV4, 2008 HT4, 2008 HO3, 2008 HE, 2008 GP20, 2008 GD, 2004 JG6
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2008-J01 -- 2008 HW1, 2008 ED69, 2008 EC69, 2008 DE, 53319, 137170
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2008-J04, 2008-J05 & 2008-J06 -- 2008 JC, 2008 HV4, 2008 HU4
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2008-J01 -- 2008 HD3, 85628
291Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2008-J01 -- 2008 HD3, 2008 GF, 2008 GD1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 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.





Notes for Today's Latest Risk Assessments
2008 HU4JPL Sentry2354208411.5e-08-9.77-9.770JPL: "Analysis based on 19 observations spanning 1.0756 days (2008-Apr-30.32444 to 2008-May-01.40002)." Diameter approximately 0.008 km. from mean, weighted H=28.1.
2008 HR3NEODyS11402045-208047.49e-09-7.77-8.100NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2008/04/29.278 to 2008/04/30.280."
JPL Sentry11392039-2106129.4e-08-6.84-7.110JPL: "Analysis based on 15 observations spanning 1.0021 days (2008-Apr-29.27703 to 2008-Apr-30.2791)." Diameter approximately 0.038 km. from mean, weighted H=24.8.
2008 HO3JPL Sentry17482053-208834.6e-10-5.63-6.050JPL: "Analysis based on 26 observations spanning 1.9404 days (2008-Apr-29.33863 to 2008-May-01.279)." Diameter approximately 1.100 km. from mean, weighted H=17.5.
2008 HD3NEODyS11402020-2090291.04e-07-3.72-4.190NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2008/04/28.265 to 2008/04/30.330."
JPL Sentry11392020-2107421.3e-07-3.67-4.240JPL: "Analysis based on 30 observations spanning 2.0647 days (2008-Apr-28.26455 to 2008-Apr-30.3293)." Diameter approximately 0.450 km. from mean, weighted H=19.4.
2008 HJNEODyS11402077-208733.35e-05-5.11-5.210NEODyS: "Based on 71 optical observations (of which 1 are rejected as outliers) from 2008/04/24.248 to 2008/04/30.377."
JPL Sentry11392077-2106211.3e-04-4.60-5.130JPL: "Analysis based on 70 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.

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 1 May '08

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

2354Noted that JPL Sentry has posted 2008 HU4 as an impact risk - see above
Grabbed MPEC 2008-J06 - 2008 JC - see above
2014Grabbed MPEC 2008-J03 - 2008 HT4 - see above
Grabbed MPEC 2008-J04 - 2008 HU4 - see above
Grabbed MPEC 2008-J05 - 2008 HV4 - see above
1748Noted that JPL Sentry has posted 2008 HO3 as an impact risk - see above
1326Grabbed MPEC 2008-J02 - 2008 HO3 - see above
1140Noted that NEODyS has updated its 2008 HD3 risk assessment - see above
Noted that NEODyS has updated its 2008 HJ risk assessment - see above
Grabbed MPEC 2008-J01 - Daily Orbit Update - see above
1139Noted that JPL Sentry has updated its 2008 HD3 risk assessment - see above
Noted that JPL Sentry has updated its 2008 HJ risk assessment - see above
Noted that JPL Sentry has updated its 2008 HR3 risk assessment - see above
Noted that NEODyS has posted 2008 HR3 as an impact risk - see above