Contents  on 28 April '08

Resources:

NOTE: The Tracking News and this Web site will be updating less often, and at sometimes irregular intervals, for the rest of April.

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 28 April '08

The MPC's NEO Confirmation Page has 4 listings: 1 new, 3 updated

When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and three updated listings. All of these were "one nighters." The Tracking News counted a total of fifteen objects listed on the NEOCP at some point on this day.

New MPECs  on 28 April '08

Minor Planet Electronic Circulars

There were fourteen MPECs issued this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-H47 - "23:54 UT" - 2008 HD3


MPEC 2008-H46 - "23:49 UT" - 2008 GE128


MPEC 2008-H45 - "19:21 UT" - 2008 HF2


MPEC 2008-H44 - "19:17 UT" - 2008 HE2


MPEC 2008-H43 - "19:14 UT" - 2008 HD2


MPEC 2008-H42 - "19:11 UT" - 2008 HD2


MPEC 2008-H41 - "19:08 UT" - 2008 HC2


MPEC 2008-H40 - "19:05 UT" - 2008 HB2


MPEC 2008-H39 - "19:02 UT" - 2008 HA2


MPEC 2008-H38 - "18:57 UT" - 2008 HZ1


MPEC 2008-H37 - "18:54 UT" - 2008 HY1


MPEC 2008-H36 - "18:51 UT" - 2008 HX1


MPEC 2008-H35 - "18:44 UT" - 2008 HW1


<< DOU on 28 Apr. '08 >>  MPEC 2008-H34 - "06:06 UT" - Daily Orbit Update

Observers  on 28 April '08

A total of 24 observing facilities appeared in this day's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 2 in MPECs 2008-H35 & 2008-H44 -- 2008 HW1, 2008 HE2
H55Astronomical Research Obs. (ARO) in Illinois, 5 in MPECs 2008-H34, 2008-H35, 2008-H38 & 2008-H44 -- 2008 HZ1, 2008 HW1, 2008 HJ, 2008 HH, 2008 HE2
432Boambee Obs. in New South Wales, 3 in MPEC 2008-H34 -- 1994 AW1, 5660, 3691
B09Capannoli Obs. in Italy, 3 in MPEC 2008-H34 -- 2008 HG, 2008 GV3, 2004 FN32
703Catalina Sky Survey (CSS) in Arizona, 4 in MPECs 2008-H34 & 2008-H35 -- 2008 HW1, 170891, 162173, 9856
151Eschenberg Obs. in Switzerland, 1 in MPEC 2008-H35 -- 2008 HW1
734Farpoint Obs. in Kansas, 5 in MPECs 2008-H35, 2008-H36, 2008-H40, 2008-H41 & 2008-H45 -- 2008 HX1, 2008 HW1, 2008 HF2, 2008 HC2, 2008 HB2
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2008-H35 & 2008-H44 -- 2008 HW1, 2008 HE2
B21Gaisberg Obs. in Austria, 1 in MPEC 2008-H38 -- 2008 HZ1
682Kanab Obs. in Utah, 1 in MPEC 2008-H38 -- 2008 HZ1
704LINEAR in New Mexico, 7 in MPECs 2008-H34 & 2008-H35 -- 2008 HW1, 2008 CP23, 54686, 144922, 143678, 7889, 3554
560Madonna di Dossobuono Obs. in Italy, 3 in MPEC 2008-H34 -- 2007 VQ4, 2004 CR2, 2003 GW
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2008-H39, 2008-H45 & 2008-H47 -- 2008 HF2, 2008 HD3, 2008 HA2
118Modra Obs. in Slovakia, 1 in MPEC 2008-H35 -- 2008 HW1
900Moriyama Obs. in Japan, 1 in MPEC 2008-H35 -- 2008 HW1
G96Mt. Lemmon Survey (MLS) in Arizona, 19 in MPECs 2008-H34, 2008-H35, 2008-H36, 2008-H37, 2008-H38, 2008-H39, 2008-H40, 2008-H41, 2008-H42, 2008-H43, 2008-H44 & 2008-H46 -- 2008 HZ1, 2008 HY1, 2008 HX1, 2008 HW1, 2008 HK, 2008 HJ, 2008 HE2, 2008 HD2, 2008 HD2, 2008 HC2, 2008 HB2, 2008 HA2, 2008 GO20, 2008 GE128, 2008 GA110, 2008 FN6, 86667, 18736, 4503
H06*Rolando Ligustri in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2008-H35 -- 2008 HW1
H06.Cristovao Jacques in Brazil via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2008-H35 -- 2008 HW1
B36Redshed Obs. in Austria, 1 in MPEC 2008-H34 -- 2008 FN6
473Remanzacco Obs. in Italy, 1 in MPEC 2008-H35 -- 2008 HW1
854Sabino Canyon Obs. in Arizona, 4 in MPECs 2008-H35, 2008-H44, 2008-H45 & 2008-H47 -- 2008 HW1, 2008 HF2, 2008 HE2, 2008 HD3
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2008-H34, 2008-H45 & 2008-H47 -- 2008 HF2, 2008 HD3, 2007 VY7
291Spacewatch 1.8m telescope in Arizona, 16 in MPECs 2008-H34, 2008-H37, 2008-H38, 2008-H45 & 2008-H47 -- 2008 HZ1, 2008 HY1, 2008 HH, 2008 HF2, 2008 HD3, 2008 GU3, 2008 GC110, 2008 GB21, 2008 GA4, 2008 FW6, 2008 FW5, 2007 PP6, 2007 PH25, 2007 MR, 2005 SM25, 2005 JB
F85Tiki Obs. in Tahiti, 3 in MPECs 2008-H34 & 2008-H35 -- 2008 HW1, 2008 HK, 2008 HG
198Wildberg Obs. in Germany, 1 in MPEC 2008-H35 -- 2008 HW1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 April '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2355 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 HJNEODyS12492077-208541.91e-05-5.28-5.360NEODyS: "Based on 45 optical observations (of which 0 are rejected as outliers) from 2008/04/24.248 to 2008/04/27.358."
JPL Sentry12482077-2106241.2e-04-4.57-5.250JPL: "Analysis based on 45 observations spanning 3.1097 days (2008-Apr-24.24725 to 2008-Apr-27.35693)." Diameter approximately 0.026 km. from mean, weighted H=25.6.

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 28 April '08

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

0032 4/29Grabbed MPEC 2008-H47 - 2008 HD3 - see above
2355Grabbed MPEC 2008-H46 - 2008 GE128 - see above
2012Grabbed MPEC 2008-H35 - 2008 HW1 - see above
Grabbed MPEC 2008-H36 - 2008 HX1 - see above
Grabbed MPEC 2008-H37 - 2008 HY1 - see above
Grabbed MPEC 2008-H38 - 2008 HZ1 - see above
Grabbed MPEC 2008-H39 - 2008 HA2 - see above
Grabbed MPEC 2008-H40 - 2008 HB2 - see above
Grabbed MPEC 2008-H41 - 2008 HC2 - see above
Grabbed MPEC 2008-H42 - 2008 HD2 - see above
Grabbed MPEC 2008-H43 - 2008 HD2 - see above
Grabbed MPEC 2008-H44 - 2008 HE2 - see above
Grabbed MPEC 2008-H45 - 2008 HF2 - see above
1249Noted that NEODyS has updated its 2008 HJ risk assessment - see above
1248Noted that JPL Sentry has updated its 2008 HJ risk assessment - see above
Grabbed MPEC 2008-H34 - Daily Orbit Update - see above