Artist's concept of Gaia spacecraft 
with Sun shield. Copyright ESA.

Artist's concept of the Gaia spacecraft (front and back views), with its Sun shield, solar panel, and the central structure with payload and service modules. See news below. Credit: Medialab. Copyright ESA.

Contents  on 21 June '07

WELCOME to A/CC's prototype daily news publication designed to be the viewing end of a planned autonomous 24-hour news service. The new tools and this publication format are working well enough now to share with readers. It is expected that this approach will require less time to maintain than our previous news and small asteroid pages, which were retired on May 14th. There's still more development ahead and there probably will be some glitches along the way, but this is what's needed to keep up with the increasing pace of minor-object news. The CRT page will be maintained separately for a little while longer, until all of this is working smoothly. And the CRT and small-asteroid ephemerides will be kept going.

Minor-Object News  on 21 June '07

Minor-Object Science  on 21 June '07

No science papers are known or prepared yet today.

NEOCP Activity  on 21 June '07

The MPC's NEO Confirmation Page has 14 listings: 8 new, 6 updated

When last checked at 2303 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had eight new and six updated listings. Of these, nine were "one nighters." So far Major News has counted a total of eighteen objects listed on the NEOCP at some point today.

New MPECs  on 21 June '07

Minor Planet Electronic Circulars

As of last check at 2303 UTC, there have been seven MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2007-M23 - "20:12 UT" - Comet C/2007 M1 (McNaught)

MPEC 2007-M22 - "20:02 UT" - Comet C/2007 K6 (McNaught)

MPEC 2007-M21 - "16:27 UT" - 2007 LR32

MPEC 2007-M20 - "15:52 UT" - 2007 MC4

MPEC 2007-M19 - "15:49 UT" - 2007 MB4

MPEC 2007-M18 - "15:47 UT" - 2004 MO7

<< DOU on 21 June '07 >>  MPEC 2007-M17 - "06:07 UT" - Daily Orbit Update

Observers  on 21 June '07

A total of 25 observing facilities appear in today's MPECs.

6581Dave Balam via 1.8m Plaskett Telescope in British Columbia, 1 in MPEC 2007-M19 -- 2007 MB4
B03Alter Satzberg Obs. in Austria, 2 in MPECs 2007-M19 & 2007-M20 -- 2007 MC4, 2007 MB4
H55Astronomical Research Obs. in Illinois, 7 in MPECs 2007-M17, 2007-M19, 2007-M20 & 2007-M23 -- C/2007 M1, 2007 MC4, 2007 MB4, 2007 MR, 2007 EK88, 2004 RK, 2000 DJ8
703Catalina Sky Survey in Arizona, 5 in MPECs 2007-M17, 2007-M20 & 2007-M21 -- 2007 LR32, 2007 MC4, 2007 LV8, 152558, 39796
A77Chante-Perdrix Obs. in France, 1 in MPEC 2007-M23 -- C/2007 M1
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2007-M23 -- C/2007 M1
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2007-M19 & 2007-M20 -- 2007 MC4, 2007 MB4
J95Great Shefford Obs. in England, 4 in MPECs 2007-M17, 2007-M19, 2007-M20 & 2007-M21 -- 2007 LR32, 2007 MC4, 2007 MB4, 2007 MQ
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2007-M17 -- 2007 FV42, 2002 KF4, 136874
415Kambah Obs. in Australia, 2 in MPECs 2007-M22 & 2007-M23 -- C/2007 M1, C/2007 K6
704LINEAR in New Mexico, 4 in MPECs 2007-M17, 2007-M19 & 2007-M21 -- 2007 LR32, 2007 MB4, 2002 KF4, 86829
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2007-M18 -- 2004 MO7
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2007-M21 -- 2007 LR32
A24New Millennium Obs. in Italy, 2 in MPEC 2007-M17 -- 5646, 1866
649Powell Obs. in Kansas, 3 in MPECs 2007-M19, 2007-M20 & 2007-M21 -- 2007 LR32, 2007 MC4, 2007 MB4
H06%E. Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2007-M21 -- 2007 LR32
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2007-M19, 2007-M20 & 2007-M21 -- 2007 LR32, 2007 MC4, 2007 MB4
434San Benedetto Po Obs. in Italy, 4 in MPEC 2007-M17 -- 2006 KE89, 2002 KF4, 145656, 86829
H36Sandlot Obs. in Kansas, 1 in MPEC 2007-M21 -- 2007 LR32
B38Santa Mama Obs. in Italy, 2 in MPEC 2007-M17 -- 2007 LV8, 2007 LF
B40Skylive Obs. in Italy, 1 in MPEC 2007-M17 -- 85275
691Spacewatch 0.9m telescope in Arizona, 8 in MPECs 2007-M17 & 2007-M21 -- 2007 LR32, 2007 KD2, 2007 KE, 2007 LS, 2005 WS55, 2000 QK25, 52750, 4179
291Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2007-M17 & 2007-M21 -- 2007 LR32, 2007 LB15, 2007 KW2, 2007 MG, 2007 LS, 1999 JR6
6735Jim Young via Table Mtn. Obs. in southern California, 3 in MPECs 2007-M19, 2007-M20 & 2007-M21 -- 2007 LR32, 2007 MC4, 2007 MB4
A55Vallemare di Borbona Obs. in Italy, 1 in MPEC 2007-M21 -- 2007 LR32

Impact Risk Monitoring  on 21 June '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: JPL at 2303 and NEODyS at 2304 UTC)
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2080.
For the latest official risk assessments, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) risk pages.





Notes for Today's Latest Risk Assessments
2007 LB15JPL13532024-204539.0e-08-3.40-3.470JPL: "Analysis based on 44 observations spanning 6.9576 days (2007-Jun-13.3467 to 2007-Jun-20.30433)." Diameter approximately 0.620 km. from mean, weighted H=18.7.

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

For a list of all risk-rated objects recently in view, see our ephemerides page.

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from an 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" for more about all this.

Chronology  on 21 June '07

Times are UTC for when the items were noted by Major News.

2303Grabbed MPEC 2007-M22 - Comet C/2007 K6 (McNaught) - see above
Grabbed MPEC 2007-M23 - Comet C/2007 M1 (McNaught) - see above
1711Grabbed MPEC 2007-M21 - 2007 LR32 - see above
1605Grabbed MPEC 2007-M18 - 2004 MO7 - see above
Grabbed MPEC 2007-M19 - 2007 MB4 - see above
Grabbed MPEC 2007-M20 - 2007 MC4 - see above
Added link to news story, "Hubble Images of Asteroids Help Astronomers Prepare for Spacecraft Visit"
Added link to news story, "Contract signed for production of Gaia primary mirror"
Added link to news story, "Hubble Photographs Two Huge Asteroids"
1405Grabbed MPEC 2007-M17 - Daily Orbit Update - see above
1353Noted that JPL has updated its 2007 LB15 risk assessment - see above
Noted that NEODyS has removed 2007 LB15 as an impact risk - see above