25 Jun '07 Major News

Contents on 25 June '07

Minor-Object News
Minor-Object Science -- two papers
IAU Minor Planet Center
- NEOCP Activity -- seven listings: 7 updated
- New MPECs -- two MPECs
- Observers -- sixteen observing facilities
Impact Risk Monitoring -- one object reported
Chronology

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 25 June '07

No news links were found or prepared on this day.

Minor-Object Science on 25 June '07

"The dust, planetesimals and planets of HD 38529" by Moro-Martin, Amaya with Renu Malhotra, John M. Carpenter & 6 others, abstract & PDF at arXiv.org 25 June - Quote: "We discuss the distribution of the potential dust-producing planetesimals from the study of the dynamical perturbations of the two known planets, considering in particular the effect of secular resonances. We identify three dynamically stable niches at 0.4-0.8 AU, 20-50 AU and beyond 60 AU. We model the spectral energy distribution of HD 38529 to find out which of these niches show signs of harboring dust-producing plantesimals. The secular analysis, together with the SED modeling resuls, suggest that the planetesimals responsible for most of the dust emission are likely located within 20-50 AU, a configuration that resembles that of the Jovian planets + Kuiper Belt in our Solar System."
"Two-flow magnetohydrodynamical jets around young stellar objects" by Casse, Fabien with Zakaria Meliani & C.Sauty, abstract & PDF at arXiv.org 25 June - Quote: "We present the first-ever simulations of non-ideal magnetohydrodynamical (MHD) stellar winds coupled with disc-driven jets where the resistive and viscous accretion disc is self-consistently described."

NEOCP Activity on 25 June '07

The MPC's NEO Confirmation Page has 7 listings: 7 updated

When last checked at 2350 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had seven updated listings. Of these, none were "one nighters." Major News counted a total of nine objects listed on the NEOCP at some point on this day.

New MPECs on 25 June '07

Minor Planet Electronic Circulars

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

MPEC 2007-M40 time-stamped "06:07 UT" - Daily Orbit Update - see below
MPEC 2007-M41 time-stamped "21:55 UT" - 2007 MT20

MPEC 2007-M41 - "21:55 UT" - 2007 MT20

K07M20T 2007 MT20 (H=18.4 ~708m) was discovered at 0656 UT 24 June by LINEAR, which observed it at June 24.29-33p4. The discovery was confirmed by Remanzacco Obs. (June 24.86-87p4), Farra d'Isonzo Obs. (June 24.89-90p2), Modra Obs. (June 24.91p3), New Millennium Obs. (June 24.97-98p11 & 25.89p3), Sabino Canyon Obs. (June 25.22-24p4), McCarthy Obs. (June 25.24-26p3), and the Catalina Sky Survey (CSS) (June 25.27p3).

<< DOU on 25 June '07 >> MPEC 2007-M40 - "06:07 UT" - Daily Orbit Update

Observations of risk-listed objects
K07L19Q 2007 LQ19 (Q=4.215 AU, arc=10 days, H=17.9 ~891m) from the Siding Spring Survey (SSS) (June 23.83-84p2)
Observations of small asteroids (H>22.0)
K07M04B 2007 MB4 (arc=9 days, H=22.7 ~98m) from Lumezzane Obs. (June 23.00p3)
K07L19W 2007 LW19 (arc=7 days, H=23.5 ~68m) from SSS (June 22.46p2)
K07L00U 2007 LU (arc=15 days, H=23.4 ~71m) from SSS (June 24.75p2)
K07L00T 2007 LT (arc=15 days, H=22.5 ~107m) from Tiki Obs. (June 23.51p1 & 23.55p1)
Observations of other objects
K07M13L 2007 ML13 (arc=2 days, H=20.2 ~309m) from Tiki Obs. (June 24.44p1 & 24.49p1)
K07M06L 2007 ML6 (arc=3 days, H=18.5 ~676m) from LINEAR (June 24.40-43p4)
K07M04C 2007 MC4 (arc=5 days, H=21.1 ~204m) from Powell Obs. (June 24.29-30p4)
K07L19U 2007 LU19 (arc=7 days, H=21.5 ~170m) from SSS (June 22.52p2)
K07L15A 2007 LA15 (arc=11 days, H=19.4 ~446m) from LAMP Obs. (June 24.26-33p3)
K07L08V 2007 LV8 (arc=12 days, H=20.0 ~339m) from Lumezzane Obs. (June 23.95p4)
K07L00V 2007 LV (arc=14 days, H=18.2 ~776m) from SSS (June 23.70p2)
K07L00F 2007 LF (arc=17 days, H=20.5 ~269m) from New Millennium Obs. (June 23.92-01p12) and Lumezzane Obs. (June 23.94p4)
K07H15E 2007 HE15 (arc=63 days, H=19.7 ~389m) from SSS (June 24.35-36p2)
K07F20E 2007 FE20 (arc=91 days, H=19.3 ~467m) from SSS (June 22.59-60p2)
K07F01K 2007 FK1 (arc=93 days, H=20.2 ~309m) from Haute Provence Obs. (May 6.91-94p12)
K07D08F 2007 DF8 (arc=123 days, H=20.4 ~282m) from Lumezzane Obs. (June 24.08p4)
K06R36O 2006 RO36 (arc=2 opp, H=18.0 ~851m) from LINEAR (June 24.41-44p4)
K06K89E 2006 KE89 (i=45.1°, q=0.211 AU, arc=3 opp, H=16.5 ~1.70 km) from New Millennium Obs. (June 23.88-94p6)
K05N44W 2005 NW44 (arc=2 opp, H=20.4 ~282m) from New Millennium Obs. (June 23.96-98p3 & 24.03p1) and Lumezzane Obs. (June 23.99-00p4)
K05L19Y 2005 LY19 (arc=2 opp, H=16.4 ~1.78 km) from SSS (June 23.62-65p4)
K00U16V 2000 UV16 (arc=4 opp, H=17.0 ~1.35 km) from SSS (June 23.51-52p2)
E5656 145656 4788 P-L from New Millennium Obs. (June 23.88-94p6) and LINEAR (June 24.25-27p3)
D7170 137170 1999 HF1 from CSS (June 24.15-17p4)
D6818 136818 1997 MW1 from Goodricke-Pigott Obs. (June 23.37-41p6 & 24.36-40p5) and Lumezzane Obs. (June 24.07p4)
85275 85275 1994 LY from New Millennium Obs. (June 23.92-02p12)
24443 24443 2000 OG from Timberlake Obs. (June 23.19-23p3)
16636 16636 1993 QP from SSS (June 23.71-75p4)
04341 4341 Poseidon (1987 KF) from SSS (June 24.46-49p4)
03103 3103 Eger (1982 BB) from CSS (June 24.18-20p4)

Observers on 25 June '07

Sixteen observing facilities appeared in this day's MPECs.

`703`	Catalina Sky Survey in Arizona, 3 in MPECs 2007-M40 & 2007-M41 -- 2007 MT20, 137170, 3103
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2007-M41 -- 2007 MT20
`683`	Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2007-M40 -- 136818
`511`	Haute Provence Obs. in Germany, 1 in MPEC 2007-M40 -- 2007 FK1
`G88`	LAMP Obs. in Arizona, 1 in MPEC 2007-M40 -- 2007 LA15
`704`	LINEAR in New Mexico, 4 in MPECs 2007-M40 & 2007-M41 -- 2007 MT20, 2007 ML6, 2006 RO36, 145656
`130`	Lumezzane Obs. in Italy, 6 in MPEC 2007-M40 -- 2007 MB4, 2007 LV8, 2007 LF, 2007 DF8, 2005 NW44, 136818
`932`	McCarthy Obs. in Connecticut, 1 in MPEC 2007-M41 -- 2007 MT20
`118`	Modra Obs. in Slovakia, 1 in MPEC 2007-M41 -- 2007 MT20
`A24`	New Millennium Obs. in Italy, 6 in MPECs 2007-M40 & 2007-M41 -- 2007 MT20, 2007 LF, 2006 KE89, 2005 NW44, 145656, 85275
`649`	Powell Obs. in Kansas, 1 in MPEC 2007-M40 -- 2007 MC4
`473`	Remanzacco Obs. in Italy, 1 in MPEC 2007-M41 -- 2007 MT20
`854`	Sabino Canyon Obs. in Arizona, 1 in MPEC 2007-M41 -- 2007 MT20
`E12`	Siding Spring Survey in New South Wales, 11 in MPEC 2007-M40 -- 2007 LQ19, 2007 LW19, 2007 LU, 2007 LU19, 2007 LV, 2007 HE15, 2007 FE20, 2005 LY19, 2000 UV16, 16636, 4341
`F85`	Tiki Obs. in Tahiti, 2 in MPEC 2007-M40 -- 2007 LT, 2007 ML13
`H83`	Timberlake Obs., 1 in MPEC 2007-M40 -- 24443

Impact Risk Monitoring on 25 June '07

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2350 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.
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

2007 LQ19	NEODyS	1347	2082	1	1.49e-06	-2.52	-2.52	0	NEODyS #2: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2007/06/13.788 to 2007/06/23.837."
2007 LQ19	JPL	1112	2082	1	1.5e-06	-2.51	-2.51	0	JPL: "Analysis based on 16 observations spanning 10.048 days (2007-Jun-13.78733 to 2007-Jun-23.83582)." Diameter approximately 0.900 km. from mean, weighted H=17.9.

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 25 June '07

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

2350	Grabbed MPEC 2007-M41 - 2007 MT20 - see above
1351	Added MOS paper, "The dust, planetesimals and planets of HD 38529" - see above Added MOS paper, "Two-flow magnetohydrodynamical jets around young stellar objects" - see above
1347	Noted that NEODyS has updated its 2007 LQ19 risk assessment - see above
1346	Noted that NEODyS has posted 2007 LQ19 as an impact risk - see above
1112	Noted that JPL has updated its 2007 LQ19 risk assessment - see above Noted that NEODyS has removed 2007 LQ19 as an impact risk - see above Grabbed MPEC 2007-M40 - Daily Orbit Update - see above

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