Pan-STARRs PS1 observatory at dawn atop 
Haleakala in Hawaii. Credit: Rob Ratkowski.

The University of Hawaii Institute for Astronomy announced June 16th that "The world became a slightly safer place on May 13, when the Pan-STARRS 1 (PS1) telescope in Hawaii started surveying the sky for killer asteroids" (see also partner news here, here, and here, and see PS1 Status Reports for some details). This photo by Rob Ratkowski shows PS1 atop Haleakala before sunrise with distant Mauna Kea. New: We note that the most recent published PS1 observations are from late February, appearing in the March 26th DOU MPEC. Andrea Milani addressed the PS1 NEO productivity issue today on the Minor Planet Mailing List (MPML).

Contents  on 18 June '10


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 18 June '10

The MPC's NEO Confirmation Page has 12 listings: 5 new, 7 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five new and seven updated listings. Of these, ten were "one nighters." So far The Tracking News has counted a total of sixteen listings on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs  on 18 June '10

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been eight MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-M21 - "16:52 UT" - 2010 MR

MPEC 2010-M20 - "15:18 UT" - Comet C/2010 L4 (WISE)

MPEC 2010-M19 - "12:22 UT" - Comets C/2009 Y5, 2009 Y6, 2009 Y7, 2009 Y8, 2009 Y9 (SOHO)

MPEC 2010-M18 - "12:04 UT" - Comets C/2009 X13, 2009 X14, 2009 X15, 2009 X16, 2009 X17 (SOHO)

MPEC 2010-M17 - "11:57 UT" - Comets C/2009 X8, 2009 X9, 2009 X10, 2009 X11, 2009 X12 (SOHO)

MPEC 2010-M16 - "11:50 UT" - Comets C/2009 X3, 2009 X4, 2009 X5, 2009 X6, 2009 X7 (SOHO)

<< DOU on 18 June '10 >>  MPEC 2010-M15 - "06:12 UT" - Daily Orbit Update

MPEC 2010-M14 - "02:54 UT" - 2010 MQ

Observers  on 18 June '10

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

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 14 in MPECs 2010-M14, 2010-M15, 2010-M20 & 2010-M21 -- 2010 MR, 2010 MQ, 2010 LN14, 2010 LM34, 2010 LL34, 2010 LK61, 2010 LE68, 2010 LA64, C/2010 L4, 2010 GA34, 2010 EV45, 2010 EH20, 2010 DW1, 2010 DB34
A81Balzaretto Obs. in Italy, 3 in MPEC 2010-M15 -- 2009 KD5, 2004 JX20, 12923
703Catalina Sky Survey (CSS) in Arizona, 7 in MPECs 2010-M14 & 2010-M15 -- 2010 MQ, 2009 KD5, 2007 TX18, 52750, 153842, 152964, 3551
448Desert Moon Obs. in New Mexico, 6 in MPEC 2010-M15 -- 2010 LN14, 2010 LE15, 2010 JV153, 2008 EN82, 161998, 7839
J95Great Shefford Obs. in England, 3 in MPECs 2010-M14, 2010-M15 & 2010-M20 -- 2010 MQ, 2010 MA, C/2010 L4
704LINEAR in New Mexico, 4 in MPEC 2010-M15 -- 2010 EV45, 2007 VG189, 2006 UM216, 1999 MN
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2010-M14, 2010-M20 & 2010-M21 -- 2010 MR, 2010 MQ, C/2010 L4
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-M15 -- 2010 GQ75
932McCarthy Obs. in Connecticut, 1 in MPEC 2010-M15 -- 2010 LM68
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2010-M14, 2010-M15 & 2010-M21 -- 2010 MR, 2010 MQ, 2010 JL33, 85628, 3352, 2100
473Remanzacco Obs. in Italy, 1 in MPEC 2010-M14 -- 2010 MQ
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2010-M14 -- 2010 MQ
H36Sandlot Obs. in Kansas, 1 in MPEC 2010-M14 -- 2010 MQ
2492LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 20 in MPECs 2010-M16, 2010-M17, 2010-M18 & 2010-M19 -- C/2009 Y9, C/2009 Y8, C/2009 Y7, C/2009 Y6, C/2009 Y5, C/2009 X9, C/2009 X8, C/2009 X7, C/2009 X6, C/2009 X5, C/2009 X4, C/2009 X3, C/2009 X17, C/2009 X16, C/2009 X15, C/2009 X14, C/2009 X13, C/2009 X12, C/2009 X11, C/2009 X10
2493LASCO Coronagraph 3 (SOHO C3) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 5 in MPECs 2010-M16, 2010-M17 & 2010-M18 -- C/2009 X9, C/2009 X3, C/2009 X16, C/2009 X13, C/2009 X12
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2010-M15 -- 2010 JF87
291Spacewatch 1.8m telescope in Arizona, 13 in MPECs 2010-M15 & 2010-M21 -- 2010 MR, 2010 LL34, 2010 LJ61, 2010 JG87, 2010 GX62, 2010 GR75, 2010 CM, 2010 CH18, 2006 OG15, 2005 NZ6, 2005 NP1, 2005 GY110, 2005 EY95
926Tenagra II Obs. in Arizona, 6 in MPECs 2010-M14, 2010-M15 & 2010-M21 -- 2010 MR, 2010 MQ, 2010 MA, 2010 LN14, 2010 LM68, 2010 LE68
H10Tzec Maun Obs. Mayhill in New Mexico, 3 in MPECs 2010-M15 & 2010-M20 -- 2010 LM68, C/2010 L4, 153842
C51WISE in Earth polar orbit, 1 in MPEC 2010-M20 -- C/2010 L4
G56Walnut Creek Obs. in northern California, 2 in MPEC 2010-M15 -- 2010 LM68, 2006 HR29
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 18 June '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 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.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
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
2010 MRJPL Sentry20032028-2093121.5e-09-4.83-5.460JPL: "Analysis based on 30 observations spanning 2.0430 days (2010-Jun-16.23145 to 2010-Jun-18.27441)." Diameter approximately 1.258 km. from mean, weighted H=17.2.

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 18 June '10

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

2003Noted that JPL Sentry has posted 2010 MR as an impact risk - see above
1703Grabbed MPEC 2010-M21 - 2010 MR - see above
1605Grabbed MPEC 2010-M20 - Comet C/2010 L4 (WISE) - see above
1458Grabbed MPEC 2010-M15 - Daily Orbit Update - see above
Grabbed MPEC 2010-M16 - Comets C/2009 X3, 2009 X4, 2009 X5, 2009 X6, 2009 X7 (SOHO) - see above
Grabbed MPEC 2010-M17 - Comets C/2009 X8, 2009 X9, 2009 X10, 2009 X11, 2009 X12 (SOHO) - see above
Grabbed MPEC 2010-M18 - Comets C/2009 X13, 2009 X14, 2009 X15, 2009 X16, 2009 X17 (SOHO) - see above
Grabbed MPEC 2010-M19 - Comets C/2009 Y5, 2009 Y6, 2009 Y7, 2009 Y8, 2009 Y9 (SOHO) - see above
0301Grabbed MPEC 2010-M14 - 2010 MQ - see above