12 Jun '07 Major News

Contents on 12 June '07

Minor-Object News
Minor-Object Science -- five papers
IAU Minor Planet Center
- NEOCP Activity -- seven listings: 4 new, 3 updated
- New MPECs -- five MPECs
- Observers -- fifteen 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 12 June '07

No news links were found or prepared on this day.

Minor-Object Science on 12 June '07

"EF Cha: Warm Dust Orbiting a Nearby 10 Myr Old Star" by Rhee, Joseph H. with Inseok Song & B. Zuckerman, abstract & PDF at arXiv.org 12 June - Quote: "Most Vega-like stars have far-infrared excess ... and contain cold dust ... analogous to the Sun's Kuiper-Belt region. However, dust in a region more akin to our asteroid belt and thus relevant to the terrestrial planet building process is warm and produces excess emission in mid-infrared wavelengths... [We] found that EF Cha ... possesses prominent mid-infrared excess. N-band spectroscopy reveals a strong emission feature characterized by a mixture of small, warm, amorphous and possibly crystalline silicate grains."
"Water vapour and hydrogen in the terrestrial-planet-forming region of a protoplanetary disk" by Eisner, J.A., abstract & PDF at arXiv.org 12 June - Quote: "Here I report spectrally dispersed near-IR interferometric observations that probe gas (which dominates the mass and dynamics of the inner disk), in addition to dust, within one astronomical unit of the young star MWC 480. I resolve gas, including water vapor and atomic hydrogen, interior to the edge of the dust disk... The observed water vapor is likely produced by the sublimation of migrating icy bodies."
"Inside-Out Evacuation of Transitional Protoplanetary Disks by the Magneto-Rotational Instability" by Chiang, Eugene I with Ruth A. Murray-Clay, abstract & PDF at arXiv.org 12 June - Quote: "Here we show that the MRI can, in fact, explain observed accretion rates for the sub-class of T Tauri disks known as transitional systems. Transitional disks are swept clean of dust inside rim radii of ~10 AU... Our study also supplies half the answer to how disks dissipate: the inner disk drains from the inside out by the MRI, while the outer disk photoevaporates by stellar ultraviolet radiation."
"Grain Retention and Formation of Planetesimals near the Snow Line in MRI-driven Turbulent Protoplanetary Disks" by Kretke, Katherine A. with D.N.C. Lin, abstract & PDF at arXiv.org 12 June - Quote: "Hydrodynamic drag leads to orbital decay and depletion of the solid material in [protoplanetary disks], with characteristic timescales as short as only a few hundred years for meter-sized objects at 1 AU. In this paper, we suggest a particle retention mechanism which promotes the accumulation of grains and the formation of planetesimals near the water sublimation front or "snow line." "
"The initial conditions of star formation in the Ophiuchus main cloud: Kinematics of the protocluster condensations" by Andre, Ph. with A. Belloche, F. Motte & N. Peretto, abstract & PDF at arXiv.org 12 June - Quote: "In order to constrain the origin of the IMF [initial mass function], we investigated the internal and relative motions of starless condensations and protostars previously detected by us in the dust continuum at 1.2mm in the L1688 protocluster of the Ophiuchus molecular cloud complex."

NEOCP Activity on 12 June '07

The MPC's NEO Confirmation Page has 7 listings: 4 new, 3 updated

When last checked at 2231 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new and three updated listings. Of these, five were "one nighters."

New MPECs on 12 June '07

Minor Planet Electronic Circulars

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

MPEC 2007-L45 time-stamped "00:18 UT" - Comet 8P/Tuttle - see below
MPEC 2007-L46 time-stamped "06:05 UT" - Daily Orbit Update - see below
MPEC 2007-L47 time-stamped "09:20 UT" - 2006 SU19 - see below
MPEC 2007-L48 time-stamped "17:25 UT" - 2000 QT7 - see below
MPEC 2007-L49 time-stamped "23:19 UT" - 2007 LV8

MPEC 2007-L49 - "23:19 UT" - 2007 LV8

K07L08V 2007 LV8 (H=19.8 ~371m) was discovered at 0812 UT 12 June by the Catalina Sky Survey (CSS), which observed it at June 12.34-36p4. The discovery was confirmed by Jim Young via Table Mtn. Obs. (June 12.42-44p4), program code % via RAS Obs. Mayhill (June 12.43-44p2), Mt. John Obs. (June 12.44p3), and Vallemare di Borbona Obs. (June 12.89p3).

MPEC 2007-L48 - "17:25 UT" - 2000 QT7

K00Q07T 2000 QT7 (H=20.1 ~323m) from Mt. John Obs. (June 11.73-75p3 & 12.63-65p4)

MPEC 2007-L47 - "09:20 UT" - 2006 SU19

K06S19U 2006 SU19 (H=19.1 ~513m) from Young/Table Mtn. (June 11.17-20p4 & 12.18-20p4)

<< DOU on 12 June '07 >> MPEC 2007-L46 - "06:05 UT" - Daily Orbit Update

Observations of small asteroids (H>22.0)
K07L00U 2007 LU (arc=2 days, H=23.4 ~71m) from Mt. John Obs. (June 11.48-49p4)
K07L00T 2007 LT (arc=2 days, H=22.4 ~112m) from Cordell-Lorenz Obs. (June 11.32-37p7)
K07G05X 2007 GX5 (arc=9 days, H=24.3 ~47m) from Catalina Station (Catalina Sta.) (April 22.40-41p3)
K07G01Y 2007 GY1 (arc=15 days, H=22.6 ~102m) from Catalina Sta. (April 26.33-34p3)
K07F01J 2007 FJ1 (arc=59 days, H=23.8 ~59m) from Catalina Sta. (April 26.39-40p3)
K07E00C 2007 EC (arc=51 days, H=22.2 ~123m) from Catalina Sta. (April 22.18p3)
K07C05Q 2007 CQ5 (arc=92 days, H=22.1 ~129m) from Catalina Sta. (April 22.38-39p3 & 26.27p3) and Haute Provence Obs. (May 10.90-92p7)
K04H00Z 2004 HZ (arc=2 opp, H=22.6 ~102m) from Catalina Sta. (April 22.43p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K07G03Q 2007 GQ3 (arc=17 days, H=22.0 ~135m) from Catalina Sta. (April 20.27-28p3)
Observations of other objects
K07L00V 2007 LV (arc=2 days, H=18.1 ~812m) from Mt. John Obs. (June 11.51-52p3)
K07L00F 2007 LF (arc=4 days, H=20.6 ~257m) from Hamamatsu-Yuto Obs. (June 11.49-52p5)
K07L00E 2007 LE (arc=4 days, H=19.2 ~490m) from Hamamatsu-Yuto Obs. (June 11.46-48p4)
K07G00F 2007 GF (arc=33 days, H=21.1 ~204m) from Catalina Sta. (April 26.38-39p3)
K07F42V 2007 FV42 (arc=83 days, H=17.8 ~933m) from Haute Provence Obs. (May 6.94-97p10), AAAA Buenos Aires Obs. (June 5.14-16p3), and Hamamatsu-Yuto Obs. (June 11.63-65p17)
K07F35S 2007 FS35 (arc=2 opp, H=19.5 ~426m) from the Spacewatch 1.8m telescope (June 11.18p3)
K07F01L 2007 FL1 (arc=86 days, H=18.7 ~616m) from the Siding Spring Survey (SSS) (June 11.69-72p4)
K07EC5D 2007 ED125 (arc=43 days, H=21.1 ~204m) from Catalina Sta. (April 26.32-33p3)
K07E88K 2007 EK88 (arc=66 days, H=21.6 ~162m) from Catalina Sta. (April 26.41p3)
K07DA3T 2007 DT103 (arc=80 days, H=19.4 ~446m) from Catalina Sta. (April 20.21p3 & 26.14p3)
K07D40Y 2007 DY40 (arc=58 days, H=20.8 ~234m) from Catalina Sta. (April 20.17p3)
K06V13D 2006 VD13 (arc=2 opp, H=19.0 ~537m) from New Millennium Obs. (Feb. 13.82-83p2, 15.81-87p4 & 16.88p1)
K06SD4J 2006 SJ134 (arc=2 opp, H=18.0 ~851m) from New Millennium Obs. (Feb. 4.98-00p2, 14.01-02p2, 15.93p1, 15.98-01p3 & 16.96-00p3)
K06R02G 2006 RG2 (Q=4.440 AU, arc=235 days, H=18.2 ~776m) from Catalina Sta. (April 20.38p3, 22.37-38p3 & 26.30p3)
K05N44W 2005 NW44 (arc=2 opp, H=20.5 ~269m) from Great Shefford Obs. (June 11.93-94p3 & 12.01p3)
K05GB9W 2005 GW119 (arc=3 opp, H=18.4 ~708m) from Catalina Sta. (April 22.33-34p3)
K05G59N 2005 GN59 (arc=3 opp, H=17.1 ~1.29 km) from Catalina Sta. (April 22.34-35p3)
K05E00J 2005 EJ (arc=2 opp, H=19.9 ~355m) from Mt. John Obs. (June 11.69-70p3)
K05A13D 2005 AD13 (arc=2 opp, H=17.9 ~891m) from Hamamatsu-Yuto Obs. (June 11.56-58p6)
K04E00W 2004 EW (arc=4 opp, H=20.8 ~234m) from Catalina Sta. (April 20.24-25p3)
K02K04F 2002 KF4 (i=37.2°, Q=4.571 AU, arc=3 opp, H=17.2 ~1.23 km) from Hamamatsu-Yuto Obs. (June 11.53-55p7)
J99J06R 1999 JR6 (arc=2 opp, H=18.1 ~812m) from Haute Provence Obs. (May 10.93-96p10) and Spacewatch 1.8m (June 11.19-20p3)
J97R00T 1997 RT (arc=2 opp, H=19.8 ~371m) from Mt. John Obs. (June 11.43-45p5)
J91G00O 1991 GO (arc=3 opp, H=19.9 ~355m) from Catalina Sta. (April 20.15-16p3)
F5341 155341 2006 SA218 from New Millennium Obs. (Feb. 14.01-02p2, 15.93p1, 15.98-01p3 & 16.96-00p3)
F4007 154007 2002 BY from Catalina Sta. (April 20.20p3 & 22.26-27p3)
F2895 152895 2000 CQ101 from Catalina Sta. (April 20.19-20p3 & 22.29p3)
E3992 143992 2004 AF from Catalina Sta. (April 20.14p3 & 22.19-20p3)
E3381 143381 2003 BC21 from New Millennium Obs. (Feb. 4.95-99p3, 14.00p1 & 15.93-95p3)
E1432 141432 2002 CQ11 from Catalina Sta. (April 20.22p3)
68216 68216 2001 CV26 from Catalina Sta. (April 22.32-33p3)
53435 53435 1999 VM40 from New Millennium Obs. (Feb. 4.95-96p2 & 15.95p1)
05646 5646 1990 TR from New Millennium Obs. (Feb. 11.92p1, 13.96p1 & 15.84-89p4)
05626 5626 1991 FE from New Millennium Obs. (Feb. 14.01-02p2, 15.94p1 & 15.98p1) and Catalina Sta. (April 20.13-14p3)
04544 4544 Xanthus (1989 FB) from New Millennium Obs. (Feb. 4.96-99p5)
02212 2212 Hephaistos (1978 SB) from New Millennium Obs. (Feb. 4.90-98p6, 13.81-82p2, 13.88-91p3, 15.81-92p7 & 16.88-93p3)
02063 2063 Bacchus (1977 HB) from the Mt. Lemmon Survey (MLS) (June 11.16-17p4)
01943 1943 Anteros (1973 EC) from New Millennium Obs. (Feb. 11.83p1, 11.88p1, 13.82-89p4, 15.82-92p5 & 16.89-94p3)
01866 1866 Sisyphus (1972 XA) from New Millennium Obs. (Feb. 4.90-98p9, 11.85p1, 13.93-96p2, 15.87-94p5 & 16.90-95p3)
01685 1685 Toro (1948 OA) from SSS (June 11.57-60p4)
01627 1627 Ivar (1929 SH) from New Millennium Obs. (Feb. 4.94-99p4, 11.85p1, 13.85-88p2 & 15.83-94p7)

MPEC 2007-L45 - "00:18 UT" - Comet 8P/Tuttle

0008 8P/Tuttle (i=55.0°, Q=10.376 AU, TP=2008 Jan. 27.01544 TT) from Catalina Sta. (April 22.46-47p3 & 26.47-48p3)

Observers on 12 June '07

Fifteen observing facilities appeared in this day's MPECs.

`834`	AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2007-L46 -- 2007 FV42
`703`	Catalina Sky Survey in Arizona, 1 in MPEC 2007-L49 -- 2007 LV8
`693`	Catalina Station in Arizona, 24 in MPECs 2007-L45 & 2007-L46 -- 2007 GX5, 2007 GY1, 2007 FJ1, 2007 EC, 2007 CQ5, 2004 HZ, 2007 GQ3, 2007 GF, 2007 ED125, 2007 EK88, 2007 DT103, 2007 DY40, 2006 RG2, 2005 GW119, 2005 GN59, 2004 EW, 1991 GO, 154007, 152895, 143992, 141432, 68216, 5626, 8
`850`	Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2007-L46 -- 2007 LT
`J95`	Great Shefford Obs. in England, 1 in MPEC 2007-L46 -- 2005 NW44
`379`	Hamamatsu-Yuto Obs. in Japan, 5 in MPEC 2007-L46 -- 2007 LF, 2007 LE, 2007 FV42, 2005 AD13, 2002 KF4
`511`	Haute Provence Obs. in Germany, 3 in MPEC 2007-L46 -- 2007 CQ5, 2007 FV42, 1999 JR6
`474`	Mt. John Obs. in New Zealand, 6 in MPECs 2007-L46, 2007-L48 & 2007-L49 -- 2007 LV8, 2000 QT7, 2007 LU, 2007 LV, 2005 EJ, 1997 RT
`G96`	Mt. Lemmon Survey in Arizona, 1 in MPEC 2007-L46 -- 2063
`A24`	New Millennium Obs. in Italy, 12 in MPEC 2007-L46 -- 2006 VD13, 2006 SJ134, 155341, 143381, 53435, 5646, 5626, 4544, 2212, 1943, 1866, 1627
`H06%`	program code % via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2007-L49 -- 2007 LV8
`E12`	Siding Spring Survey in New South Wales, 2 in MPEC 2007-L46 -- 2007 FL1, 1685
`291`	Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2007-L46 -- 2007 FS35, 1999 JR6
`6735`	Jim Young via Table Mtn. Obs. in southern California, 2 in MPECs 2007-L47 & 2007-L49 -- 2007 LV8, 2006 SU19
`A55`	Vallemare di Borbona Obs. in Italy, 1 in MPEC 2007-L49 -- 2007 LV8

Impact Risk Monitoring on 12 June '07

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2231 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 LS	NEODyS	1407	2012-2069	5	3.13e-09	-5.07	-5.56	0	NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2007/06/08.292 to 2007/06/11.266."

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 12 June '07

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

0025 6/13	Grabbed MPEC 2007-L49 - 2007 LV8 - see above
2231	Grabbed MPEC 2007-L48 - 2000 QT7 - see above
1407	Noted that NEODyS has posted 2007 LS as an impact risk - see above
1313	Grabbed MPEC 2007-L46 - Daily Orbit Update - see above Grabbed MPEC 2007-L47 - 2006 SU19 - see above
0530	Added MOS paper, "EF Cha: Warm Dust Orbiting a Nearby 10 Myr Old Star" - see above Added MOS paper, "Grain Retention and Formation of Planetesimals near the Snow Line in MRI-driven Turbulent Protoplanetary Disks" - see above Added MOS paper, "Inside-Out Evacuation of Transitional Protoplanetary Disks by the Magneto-Rotational Instability" - see above Added MOS paper, "The initial conditions of star formation in the Ophiuchus main cloud: Kinematics of the protocluster condensations" - see above Added MOS paper, "Water vapour and hydrogen in the terrestrial-planet-forming region of a protoplanetary disk" - see above
0439	Grabbed MPEC 2007-L45 - Comet 8P/Tuttle - see above

http://www.HohmannTransfer.com/mn/07/07163_0612.htm
Publisher information, privacy statement, and disclaimer.
This page is © Copyright 2007 Columbine, Inc. - All Rights Reserved
Any mentioned trademarks are the property of their respective owners.
Various tabular formats and data used on this page are acknowledged as belonging to JPL, MPC, NEODyS, and/or others.
Do NOT copy, mirror, or embed this page, but you are welcome to link to it, and you may embed the RSS news feed. All information here is subject to very frequent change during the day of news compilation. Individuals may make copies for their own private, non-commercial use. Please report broken links or other problems with this page to <webmaster@hohmanntransfer.com> (HTML 4.01 validation).
Important updates to Major News About Minor Objects are flagged by RSS news feed (link)