24 May '07 Major News

Contents on 24 May '07

Minor-Object News -- six items
Minor-Object Science -- one paper
IAU Minor Planet Center
- NEOCP Activity -- eight listings: 3 new, 5 updated
- New MPECs -- ten MPECs
- Observers -- 48 observing facilities
Impact Risk Monitoring -- three objects 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 24 May '07

"Texas Astronomers Discover Multi-Planet System Around Unexpected Star," Univ. of Texas at Austin 23 May - Quote: "'There are two competing planet-formation models,' [Michael] Endl said. Those models are known as the 'core accretion model' and the 'disk instability model.' Both models start with a rotating cloud with a star forming at its center. As it rotates, the cloud flattens into a disk. Over time, dust in the disk begins to clump together to form the seeds that will eventually become planets. Where the two models differ is in terms of timescale."
"Planetary Society Asteroid Tagging Contest Generates Worldwide Interest," Planetary Soc. 23 May - Quote: "Tagging may be necessary to track an asteroid accurately enough to determine whether it will impact Earth, and thus help decide whether to mount a deflection mission to alter its orbit."
"Ice Age Idea Sure To Make An Impact On Scientists," Eugene Register-Guard 24 May - Quote: "Then, after about 1,000 years, the climate suddenly returned to the warm, interglacial period that continues today."
- "It came like yesterday," The Economist 24 May - Quote: "And because it happened so recently -- 'like yesterday' in the words of James Kennett ... -- any amateur-archaeologist could inspect the evidence for himself by digging deep enough. In many places in the United States and Canada, at a depth corresponding to 12,900 years ago, a few centimetres of charcoal will appear."
- "Ancient Meteor Blast May Have Caused Extinctions," Univ. of California Santa Barbara 23 May - Quote: "The time period in question is called the 'Younger Dryas,' a time of abrupt cooling that lasted for about 1,000 years and occurred during an inter-glacial warm period. Evidence for the temperature change is recorded in ice cores. According to the scientists, the extraterrestrial rock must have been about five kilometers across, and either exploded in the atmosphere or directly hit the Laurentide ice sheet located in the Northeastern section of North America."
"A Brown Dwarf Joins the Jet-Set," ESO 23 May - Quote: "Jets of matter have been discovered around a very low mass 'failed star', mimicking a process seen in young stars. This suggests that these 'brown dwarfs' form in a similar manner to normal stars but also that outflows are driven out by objects ... down to Jupiter-sized objects. The brown dwarf with the name 2MASS1207-3932 [had already been found to have] a disc surrounding it, not unlike very young stars."

Minor-Object Science on 24 May '07

"Testing Gravity in the Outer Solar System: Results from Trans-Neptunian Objects" by Wallin, John F. with David S. Dixon & Gary L. Page, abstract & PDF at arXiv.org 24 May - Quote: "To place limits on deviations from Newtonian gravity, we have selected a well observed sample of TNOs found orbiting between 20 and 100 AU from the Sun."

NEOCP Activity on 24 May '07

The MPC's NEO Confirmation Page has 8 listings: 3 new, 5 updated

When last checked at 2356 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and five updated listings. Of these, four were "one nighters." Major News counted a total of twelve objects listed on the NEOCP at some point on this day.

New MPECs on 24 May '07

Minor Planet Electronic Circulars

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

MPEC 2007-K37 time-stamped "06:07 UT" - Daily Orbit Update - see below
MPEC 2007-K38 time-stamped "19:51 UT" - Comet C/2007 E1 (Garradd) - see below
MPEC 2007-K39 time-stamped "19:59 UT" - Comet C/2007 E2 (Lovejoy) - see below
MPEC 2007-K40 time-stamped "20:06 UT" - Comet C/2007 G1 (LINEAR) - see below
MPEC 2007-K41 time-stamped "20:15 UT" - Comet P/2007 H3 (Garradd) - see below
MPEC 2007-K42 time-stamped "20:19 UT" - Comet C/2007 JA21 (LINEAR) - see below
MPEC 2007-K43 time-stamped "20:30 UT" - Observations of Comets - see below
MPEC 2007-K44 time-stamped "21:23 UT" - 2007 KE4 - see below
MPEC 2007-K45 time-stamped "22:42 UT" - Comets C/2006 Y10, 2006 Y11, 2006 Y12, 2006 Y13, 2006 Y14 (SOHO) - see below
MPEC 2007-K46 time-stamped "22:59 UT" - Comets C/2006 Y15, 2006 Y16, 2006 Y17, 2007 A4, 2007 A5 (SOHO)

MPEC 2007-K46 - "22:59 UT" - Comets C/2006 Y15, 2006 Y16, 2006 Y17, 2007 A4, 2007 A5 (SOHO)

CK07A050 C/2007 A5 from the LASCO Coronagraph 3 on the Solar & Heliospheric Obs. (SOHO) (Jan. 9.45-47p4, 9.53p2 & 9.61-65p6)
CK07A040 C/2007 A4 from SOHO C3 (Jan. 4.76-78p4, 4.82-93p12 & 4.97-14p16) and the LASCO Coronagraph 2 on the Solar & Heliospheric Obs. (SOHO) (Jan. 5.19-23p8)
CK06Y170 C/2006 Y17 from SOHO C3 (2006 Dec. 29.53-61p8, 2006 Dec. 29.68-78p12, 2006 Dec. 29.82-93p12 & 2006 Dec. 29.97p2)
CK06Y160 C/2006 Y16 from SOHO C2 (2006 Dec. 29.41-54p18)
CK06Y150 C/2006 Y15 from SOHO C3 (2006 Dec. 29.18-22p6, 2006 Dec. 29.28p2 & 2006 Dec. 29.32-43p12) and SOHO C2 (2006 Dec. 29.48-54p10)

MPEC 2007-K45 - "22:42 UT" - Comets C/2006 Y10, 2006 Y11, 2006 Y12, 2006 Y13, 2006 Y14 (SOHO)

CK06Y140 C/2006 Y14 from SOHO C2 (2006 Dec. 28.50-60p14)
CK06Y130 C/2006 Y13 from SOHO C3 (2006 Dec. 28.15-28p14 & 2006 Dec. 28.32-43p12) and SOHO C2 (2006 Dec. 28.52-60p12)
CK06Y120 C/2006 Y12 from SOHO C2 (2006 Dec. 27.81-98p22)
CK06Y110 C/2006 Y11 from SOHO C3 (2006 Dec. 24.82-90p10) and SOHO C2 (2006 Dec. 24.98-00p6 & 2006 Dec. 25.06-10p8)
CK06Y100 C/2006 Y10 from SOHO C3 (2006 Dec. 23.07-11p6, 2006 Dec. 23.24-28p6, 2006 Dec. 23.32-36p4 & 2006 Dec. 23.40-51p10) and SOHO C2 (2006 Dec. 23.52-65p16)

MPEC 2007-K44 - "21:23 UT" - 2007 KE4

K07K04E 2007 KE4 (risk-listed, Earth MOID=6.4 LD, H=25.0 ~34m) was discovered at 0751 UT 24 May by the Catalina Sky Survey (CSS), which observed it at May 24.33-40p11. The discovery was confirmed by Farra d'Isonzo Obs. (May 24.85-86p3).

MPEC 2007-K43 - "20:30 UT" - Observations of Comets

CK07B020 C/2007 B2 (Skiff) from Calarreona Obs. (May 18.86p3) and Buchloe Obs. (May 19.89-90p3)
CK06V13Z C/2006 VZ13 (LINEAR) from Hadano Obs. (May 14.75-76p4), Ageo Obs. (May 15.70-71p3), and Sumoto Obs. (May 17.77-78p6)
CK06V010 C/2006 V1 (Catalina) from Terres Blanches Obs. (May 18.87p1), Ageo Obs. (May 19.51-52p3), Buchloe Obs. (May 19.90p3), Vicksburg Obs. (May 20.09-11p2 & 21.09-10p2), Boambee Obs. (May 20.33-35p2 & 21.35-37p2), and La Murta Obs. (May 23.88-89p3)
CK06M040 C/2006 M4 (SWAN) from Ageo Obs. (April 28.78p2, May 17.76-77p2 & 19.77p2)
CK05Y00W C/2005 YW (LINEAR) from North Ryde Obs. (May 11.63-64p2) and Kambah Obs. (May 24.45-46p2)
CK05L030 C/2005 L3 (McNaught) from La Murta Obs. (May 19.01p3), Montcabre Obs. (May 19.98-99p3), Powell Obs. (May 21.25-28p5), and Kambah Obs. (May 24.57p1)
CK04D010 C/2004 D1 (NEAT) from Torredembarra Obs. (May 14.90-93p3), Montcabre Obs. (May 19.03p3), and Ageo Obs. (May 19.69p3)
CK04B010 C/2004 B1 (LINEAR) from New Millennium Obs. (May 17.94-00p8, 18.93-99p7 & 22.95-00p9), Montcabre Obs. (May 19.96-97p3), and LINEAR (May 24.25-27p3)
CK03W42T C/2003 WT42 (LINEAR) from Hadano Obs. (May 14.55p3), Ageo Obs. (May 15.59-60p2), New Millennium Obs. (May 17.86-91p8, 18.86-90p10 & 22.87p2), Chante-Perdrix Obs. (May 18.96-97p3), Murcia Obs. (May 19.00-01p3), Remanzacco Obs. (May 19.84-85p3), Vicksburg Obs. (May 20.15-18p2 & 21.14-16p2), Cordell-Lorenz Obs. (May 21.15-19p3), Hamamatsu-Yuto Obs. (May 21.50-52p3), CSS (May 23.21-23p4), and Montcabre Obs. (May 23.87p3)
CK02V94Q C/2002 VQ94 (LINEAR) from Ageo Obs. (May 15.64-66p3), Montcabre Obs. (May 19.90-91p3), Cordell-Lorenz Obs. (May 20.19-26p4 & 21.13-19p4), Sumoto Obs. (May 20.68-69p2), and Vicksburg Obs. (May 21.19-21p2)
0186 186P/Garradd from the Siding Spring Survey (SSS) (May 20.55-58p4) and Kambah Obs. (May 24.48-49p2)
0099 99P/Kowal 1 from Montcabre Obs. (May 19.93p3), Ageo Obs. (May 20.66p2), CSS (May 21.28-31p4), and Kambah Obs. (May 24.52-53p2)
0096 96P/Machholz 1 from Hadano Obs. (May 14.73p5 & 15.71-72p5), Ageo Obs. (May 15.69p3 & 20.74p3), Kiev Comet Station (Kiev) (May 16.03-05p6), Sumoto Obs. (May 17.76p1), Montcabre Obs. (May 19.01p3), Mataro Obs. (May 19.04-05p3), Murcia Obs. (May 19.06p3), Buchloe Obs. (May 19.98p3), Vicksburg Obs. (May 21.32-33p2), Cordell-Lorenz Obs. (May 21.40p2), and LINEAR (May 24.36-39p4)
0087 87P/Bus from New Millennium Obs. (May 17.85-88p7 & 18.85-88p6)

MPEC 2007-K42 - "20:19 UT" - Comet C/2007 JA21 (LINEAR)

CK07J21A C/2007 JA21 (LINEAR) (i=89.8°, q=5.363 AU, TP=2006 Nov. 12.505 TT) from Montcabre Obs. (May 18.97-98p3 & 23.92p3), Torredembarra Obs. (May 19.06-09p3), Frasso Sabino Obs. (May 19.90p1), Buchloe Obs. (May 19.94p3), and Modra Obs. (May 21.03p2)

MPEC 2007-K41 - "20:15 UT" - Comet P/2007 H3 (Garradd)

PK07H030 P/2007 H3 (Garradd) (q=1.829 AU, Q=5.171 AU, TP=2007 Aug. 15.3441 TT) from Montcabre Obs. (May 19.86p3), SSS (May 20.51-53p3), and Kambah Obs. (May 24.43-44p2)

MPEC 2007-K40 - "20:06 UT" - Comet C/2007 G1 (LINEAR)

CK07G010 C/2007 G1 (LINEAR) (i=88.4°, q=2.646 AU, TP=2008 Nov. 16.8404 TT) from Hadano Obs. (May 14.66-67p5), Torredembarra Obs. (May 16.98-99p4 & 18.96-97p3), Ageo Obs. (May 17.65-66p3), New Millennium Obs. (May 18.02-04p5 & 19.02-07p9), Montcabre Obs. (May 18.99-00p3 & 22.91-92p2), Frasso Sabino Obs. (May 19.89p2), Carmelita Obs. (May 19.94p3), Modra Obs. (May 21.04-06p3), Vicksburg Obs. (May 21.24-27p2), Altenburg Obs. (May 22.06-07p3), and La Murta Obs. (May 23.87p3)

MPEC 2007-K39 - "19:59 UT" - Comet C/2007 E2 (Lovejoy)

CK07E020 C/2007 E2 (Lovejoy) (i=95.9°, q=1.093 AU, TP=2007 Mar. 27.5183 TT) from Konan Obs. (April 28.58-60p4), Bornheim Obs. (May 2.90-91p4 & 3.88-89p3), Bisei Spaceguard Center (Bisei) (May 4.57p4, 7.75-76p5, 11.56-57p4, 13.77p4 & 14.60-61p4), Sumoto Obs. (May 10.75-79p12 & 17.71-72p8), Hadano Obs. (May 14.60-61p5, 15.66p5 & 17.60-61p5), Santa Pola Obs. (May 15.89p3), Torredembarra Obs. (May 16.93-94p4), Stammersdorf Obs. (May 18.87-90p4), Calarreona Obs. (May 18.88-89p3), Montcabre Obs. (May 18.89p3, 19.94p3, 21.86-87p3, 22.88-89p3 & 23.88-89p3), Ontinyent Obs. (May 18.94-95p3), Mataro Obs. (May 18.97-98p3), Murcia Obs. (May 18.97p3, 20.01p3, 21.91-92p3 & 23.92p3), Altenburg Obs. (May 18.98-99p5), La Murta Obs. (May 18.99p3), Carmelita Obs. (May 19.92p3, 20.84p3 & 23.87p3), Siegen Obs. (May 19.92p3 & 21.98p2), Buchloe Obs. (May 19.93-94p4), Vicksburg Obs. (May 20.12-13p3 & 21.12p2), Cordell-Lorenz Obs. (May 20.13p1, 20.18p1, 20.23p1, 20.28p1, 20.33p1 & 21.15-32p7), Hamamatsu-Yuto Obs. (May 20.60-61p4 & 21.58-60p2), Modra Obs. (May 21.00-01p5 & 23.04-06p7), Posadas Obs. (May 22.92-94p3), and New Millennium Obs. (May 22.95-00p8)

MPEC 2007-K38 - "19:51 UT" - Comet C/2007 E1 (Garradd)

CK07E010 C/2007 E1 (Garradd) (i=174.4°, Q=130.300 AU, TP=2007 May 23.8199 TT) from Bornheim Obs. (April 12.83-84p5, 13.83-84p5 & 14.81-82p5), Konan Obs. (May 7.50-51p3), Bisei (May 11.49p4), Hadano Obs. (May 15.50p3), Calarreona Obs. (May 18.85p3), Ageo Obs. (May 19.45p3), Murcia Obs. (May 19.84-86p3), Masquefa Obs. (May 19.87-88p3), and Buchloe Obs. (May 19.88p3)

<< DOU on 24 May '07 >> MPEC 2007-K37 - "06:07 UT" - Daily Orbit Update

Observations of risk-listed objects
K07K02V 2007 KV2 (small asteroid, arc=3 days, H=24.7 ~39m) from Astronomical Research Obs. (ARO) (May 23.23p3) and the Spacewatch 1.8m telescope (May 24.20p2)
Observations of small asteroids (H>22.0)
K07K02W 2007 KW2 (arc=3 days, H=22.4 ~112m) from ARO (May 23.24-25p3) and Guidestar Obs. (May 24.01-03p4)
K07K02D 2007 KD2 (Q=4.465 AU, arc=6 days, H=23.5 ~68m) from Spacewatch 1.8m (May 24.22-23p3)
Observations of other objects
K07K00D 2007 KD (arc=12 days, H=20.7 ~245m) from Desert Moon Obs. (May 23.19-21p3)
K07J35J 2007 JJ35 (i=55.9°, arc=9 days, H=18.5 ~676m) from Desert Moon Obs. (May 23.16-17p4)
K07H15F 2007 HF15 (Q=4.447 AU, arc=31 days, H=20.8 ~234m) from Spacewatch 1.8m (May 24.21-22p3)
K07G49D 2007 GD49 (arc=39 days, H=16.8 ~1.48 km) from Desert Moon Obs. (May 23.24-27p3)
K07F01K 2007 FK1 (arc=66 days, H=20.2 ~309m) from Bergen-Enkheim Obs. (May 21.97-98p17)
K07E00X 2007 EX (arc=74 days, H=17.0 ~1.35 km) from Desert Moon Obs. (May 23.13-15p3)
K07D83B 2007 DB83 (arc=3 opp, H=18.3 ~741m) from New Millennium Obs. (May 22.88p1)
K07D08F 2007 DF8 (arc=91 days, H=20.3 ~295m) from LINEAR (May 23.21-25p5)
K06WC9E 2006 WE129 (i=39.5°, arc=178 days, H=19.9 ~355m) from Lumezzane Obs. (May 21.89-90p4), Jim Young via Table Mtn. Obs. (May 23.21-23p4), and Guidestar Obs. (May 23.97-99p3)
K05W02R 2005 WR2 (arc=2 opp, H=19.3 ~467m) from SSS (May 23.48-52p4)
K02K04F 2002 KF4 (i=37.2°, Q=4.571 AU, arc=3 opp, H=17.3 ~1.17 km) from New Millennium Obs. (May 22.98-01p5)
K02A03Q 2002 AQ3 (i=40.0°, arc=4 opp, H=17.2 ~1.23 km) from Desert Moon Obs. (May 23.41-45p3)
K00K43W 2000 KW43 (arc=2 opp, H=20.0 ~339m) from Lumezzane Obs. (May 21.92-94p4)
F4453 154453 2003 CJ11 from New Millennium Obs. (May 22.87-88p3)
F4007 154007 2002 BY from New Millennium Obs. (May 22.88p2)
86829 86829 2000 GR146 from LINEAR (May 23.24-27p5)
40267 40267 1999 GJ4 from New Millennium Obs. (May 22.87-88p5)
39796 39796 1997 TD from New Millennium Obs. (May 22.95-00p8) and LINEAR (May 23.24-27p5)
04487 4487 Pocahontas (1987 UA) from the Mt. Lemmon Survey (MLS) (May 23.20-22p4)

Observers on 24 May '07

A total of 48 observing facilities appeared in this day's MPECs.

`349`	Ageo Obs. in Japan, 10 in MPECs 2007-K38, 2007-K40 & 2007-K43 -- C/2006 VZ13, C/2006 V1, C/2006 M4, C/2004 D1, C/2003 WT42, C/2002 VQ94, 99, 96, C/2007 G1, C/2007 E1
`A39`	Altenburg Obs., 2 in MPECs 2007-K39 & 2007-K40 -- C/2007 G1, C/2007 E2
`H55`	Astronomical Research Obs. in Illinois, 2 in MPEC 2007-K37 -- 2007 KV2, 2007 KW2
`A74`	Bergen-Enkheim Obs. in Germany, 1 in MPEC 2007-K37 -- 2007 FK1
`300`	Bisei Spaceguard Center in Japan, 2 in MPECs 2007-K38 & 2007-K39 -- C/2007 E2, C/2007 E1
`432`	Boambee Obs. in New South Wales, 1 in MPEC 2007-K43 -- C/2006 V1
`127`	Bornheim Obs. in Germany, 2 in MPECs 2007-K38 & 2007-K39 -- C/2007 E2, C/2007 E1
`215`	Buchloe Obs. in Germany, 6 in MPECs 2007-K38, 2007-K39, 2007-K42 & 2007-K43 -- C/2007 B2, C/2006 V1, 96, C/2007 JA21, C/2007 E2, C/2007 E1
`J79`	Calarreona Obs. in Spain, 3 in MPECs 2007-K38, 2007-K39 & 2007-K43 -- C/2007 B2, C/2007 E2, C/2007 E1
`B20`	Carmelita Obs. in Spain, 2 in MPECs 2007-K39 & 2007-K40 -- C/2007 G1, C/2007 E2
`703`	Catalina Sky Survey in Arizona, 3 in MPECs 2007-K43 & 2007-K44 -- 2007 KE4, C/2003 WT42, 99
`A77`	Chante-Perdrix Obs. in France, 1 in MPEC 2007-K43 -- C/2003 WT42
`850`	Cordell-Lorenz Obs. in Tennessee, 4 in MPECs 2007-K39 & 2007-K43 -- C/2003 WT42, C/2002 VQ94, 96, C/2007 E2
`448`	Desert Moon Obs. in New Mexico, 5 in MPEC 2007-K37 -- 2007 KD, 2007 JJ35, 2007 GD49, 2007 EX, 2002 AQ3
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2007-K44 -- 2007 KE4
`157`	Frasso Sabino Obs. in Italy, 2 in MPECs 2007-K40 & 2007-K42 -- C/2007 JA21, C/2007 G1
`A17`	Guidestar Obs. in Germany, 2 in MPEC 2007-K37 -- 2007 KW2, 2006 WE129
`355`	Hadano Obs. in Japan, 6 in MPECs 2007-K38, 2007-K39, 2007-K40 & 2007-K43 -- C/2006 VZ13, C/2003 WT42, 96, C/2007 G1, C/2007 E2, C/2007 E1
`379`	Hamamatsu-Yuto Obs. in Japan, 2 in MPECs 2007-K39 & 2007-K43 -- C/2003 WT42, C/2007 E2
`415`	Kambah Obs. in Australia, 5 in MPECs 2007-K41 & 2007-K43 -- C/2005 YW, C/2005 L3, 186, 99, P/2007 H3
`585`	Kiev Comet Station in the Ukraine, 1 in MPEC 2007-K43 -- 96
`352`	Konan Obs., 2 in MPECs 2007-K38 & 2007-K39 -- C/2007 E2, C/2007 E1
`704`	LINEAR in New Mexico, 5 in MPECs 2007-K37 & 2007-K43 -- C/2004 B1, 96, 2007 DF8, 86829, 39796
`J76`	La Murta Obs. in Spain, 4 in MPECs 2007-K39, 2007-K40 & 2007-K43 -- C/2006 V1, C/2005 L3, C/2007 G1, C/2007 E2
`130`	Lumezzane Obs. in Italy, 2 in MPEC 2007-K37 -- 2006 WE129, 2000 KW43
`232`	Masquefa Obs. in Spain, 1 in MPEC 2007-K38 -- C/2007 E1
`A06`	Mataro Obs. in Spain, 2 in MPECs 2007-K39 & 2007-K43 -- 96, C/2007 E2
`118`	Modra Obs. in Slovakia, 3 in MPECs 2007-K39, 2007-K40 & 2007-K42 -- C/2007 JA21, C/2007 G1, C/2007 E2
`213`	Montcabre Obs. in Spain, 11 in MPECs 2007-K39, 2007-K40, 2007-K41, 2007-K42 & 2007-K43 -- C/2005 L3, C/2004 D1, C/2004 B1, C/2003 WT42, C/2002 VQ94, 99, 96, C/2007 JA21, P/2007 H3, C/2007 G1, C/2007 E2
`G96`	Mt. Lemmon Survey in Arizona, 1 in MPEC 2007-K37 -- 4487
`J78`	Murcia Obs. in Spain, 4 in MPECs 2007-K38, 2007-K39 & 2007-K43 -- C/2003 WT42, 96, C/2007 E2, C/2007 E1
`A24`	New Millennium Obs. in Italy, 11 in MPECs 2007-K37, 2007-K39, 2007-K40 & 2007-K43 -- C/2004 B1, C/2003 WT42, 87, C/2007 G1, C/2007 E2, 2007 DB83, 2002 KF4, 154453, 154007, 40267, 39796
`423`	North Ryde Obs. in New South Wales, 1 in MPEC 2007-K43 -- C/2005 YW
`445`	Ontinyent Obs., 1 in MPEC 2007-K39 -- C/2007 E2
`J53`	Posadas Obs. in Spain, 1 in MPEC 2007-K39 -- C/2007 E2
`649`	Powell Obs. in Kansas, 1 in MPEC 2007-K43 -- C/2005 L3
`473`	Remanzacco Obs. in Italy, 1 in MPEC 2007-K43 -- C/2003 WT42
`J49`	Santa Pola Obs. in Spain, 1 in MPEC 2007-K39 -- C/2007 E2
`E12`	Siding Spring Survey in New South Wales, 3 in MPECs 2007-K37, 2007-K41 & 2007-K43 -- 186, P/2007 H3, 2005 WR2
`510`	Siegen Obs. in Germany, 1 in MPEC 2007-K39 -- C/2007 E2
`2492`	LASCO Coronagraph 2 via the Solar & Heliospheric Obs. in Earth-Sun L1 HALO orbit, 8 in MPECs 2007-K45 & 2007-K46 -- C/2007 A4, C/2006 Y16, C/2006 Y15, C/2006 Y14, C/2006 Y13, C/2006 Y12, C/2006 Y11, C/2006 Y10
`2493`	LASCO Coronagraph 3 via the Solar & Heliospheric Obs. in Earth-Sun L1 HALO orbit, 7 in MPECs 2007-K45 & 2007-K46 -- C/2007 A5, C/2007 A4, C/2006 Y17, C/2006 Y15, C/2006 Y13, C/2006 Y11, C/2006 Y10
`291`	Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2007-K37 -- 2007 KV2, 2007 KD2, 2007 HF15
`A97`	Stammersdorf Obs. in Austria, 1 in MPEC 2007-K39 -- C/2007 E2
`361`	Sumoto Obs. in Japan, 4 in MPECs 2007-K39 & 2007-K43 -- C/2006 VZ13, C/2002 VQ94, 96, C/2007 E2
`6735`	Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2007-K37 -- 2006 WE129
`B26`	Terres Blanches Obs. in France, 1 in MPEC 2007-K43 -- C/2006 V1
`A03`	Torredembarra Obs., 4 in MPECs 2007-K39, 2007-K40, 2007-K42 & 2007-K43 -- C/2004 D1, C/2007 JA21, C/2007 G1, C/2007 E2
`H47`	Vicksburg Obs. in Mississippi, 6 in MPECs 2007-K39, 2007-K40 & 2007-K43 -- C/2006 V1, C/2003 WT42, C/2002 VQ94, 96, C/2007 G1, C/2007 E2

Impact Risk Monitoring on 24 May '07

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2356 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 KV2	JPL	1307	2092	2	4.0e-10	-9.54	-9.68	0	JPL: "Analysis based on 18 observations spanning 2.8492 days (2007-May-21.35472 to 2007-May-24.20395)." Diameter approximately 0.038 km. from mean, weighted H=24.8.

2007 KE4	JPL	2356	2026-2103	15	1.3e-05	-4.63	-4.83	0	JPL: "Analysis based on 14 observations spanning .53419 days (2007-May-24.32711 to 2007-May-24.8613)." Diameter approximately 0.034 km. from mean, weighted H=25.0.

2004 XN44	JPL	0342	2009-2063	8	4.3e-09	-4.10	-4.51	0	JPL: "Analysis based on 17 observations spanning 1.9567 days (2004-Dec-13.253512 to 2004-Dec-15.210231)." Diameter approximately 0.740 km. from mean, weighted H=18.3.

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 24 May '07

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

2356	Noted that JPL has posted 2007 KE4 as an impact risk - see above
2317	Grabbed MPEC 2007-K45 - Comets C/2006 Y10, 2006 Y11, 2006 Y12, 2006 Y13, 2006 Y14 (SOHO) - see above Grabbed MPEC 2007-K46 - Comets C/2006 Y15, 2006 Y16, 2006 Y17, 2007 A4, 2007 A5 (SOHO) - see above
2235	Grabbed MPEC 2007-K44 - 2007 KE4 - see above
2047	Grabbed MPEC 2007-K38 - Comet C/2007 E1 (Garradd) - see above Grabbed MPEC 2007-K39 - Comet C/2007 E2 (Lovejoy) - see above Grabbed MPEC 2007-K40 - Comet C/2007 G1 (LINEAR) - see above Grabbed MPEC 2007-K41 - Comet P/2007 H3 (Garradd) - see above Grabbed MPEC 2007-K42 - Comet C/2007 JA21 (LINEAR) - see above Grabbed MPEC 2007-K43 - Observations of Comets - see above
1914	Added link to news story, "Planetary Society Asteroid Tagging Contest Generates Worldwide Interest" Added link to news story, "It came like yesterday" Added link to news story, "Ice Age Idea Sure To Make An Impact On Scientists" Added link to news story, "Texas Astronomers Discover Multi-Planet System Around Unexpected Star"
1421	Added link to news story, "A Brown Dwarf Joins the Jet-Set" Added link to news story, "Ancient Meteor Blast May Have Caused Extinctions"
1307	Noted that JPL has updated its 2007 KV2 risk assessment - see above Grabbed MPEC 2007-K37 - Daily Orbit Update - see above
0406	Added MOS paper, "Testing Gravity in the Outer Solar System: Results from Trans-Neptunian Objects" - see above
0342	Noted that JPL has updated its 2004 XN44 risk assessment - see above

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