2007-12-17 Tracking News

Contents on 17 December '07

IAU Minor Planet Center
- NEOCP Activity -- 18 listings: 8 new, 10 updated
- New MPECs -- fourteen MPECs
- Observers -- 57 observing facilities
Impact Risk Monitoring -- five objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page
Earth's Busy Neighborhood Traffic Report
Ephemerides for risk-rated and nearby objects
Old & new CRT Archive
Old News Archive & Small Objects Archive

The latest news: framed access (best), RSS news feed (flags updates), or redirection - Note: A/CC has a main Web site and a backup site, which now has its own backup 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 this year 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 17 December '07

The MPC's NEO Confirmation Page has 18 listings: 8 new, 10 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had eight new and ten updated listings. Of these, fourteen were "one nighters." So far The Tracking News has counted a total of 30 objects listed on the NEOCP at some point today.

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

New MPECs on 17 December '07

Minor Planet Electronic Circulars

As of last check at 2354 UTC, there have been fourteen MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2007-Y05 time-stamped "07:11 UT" - Daily Orbit Update - see below
MPEC 2007-Y06 time-stamped "16:17 UT" - Comet P/2007 T2 (Kowalski) - see below
MPEC 2007-Y07 time-stamped "16:26 UT" - Comet C/2007 T5 (Gibbs) - see below
MPEC 2007-Y08 time-stamped "16:33 UT" - Comet P/2007 T6 (Catalina) - see below
MPEC 2007-Y09 time-stamped "16:37 UT" - Comet C/2007 U1 (LINEAR) - see below
MPEC 2007-Y10 time-stamped "16:41 UT" - Comet C/2007 W1 (Boattini) - see below
MPEC 2007-Y11 time-stamped "16:49 UT" - Comet C/2007 W3 (LINEAR) - see below
MPEC 2007-Y12 time-stamped "17:06 UT" - Observations of Comets - see below
MPEC 2007-Y13 time-stamped "17:59 UT" - 2007 YF - see below
MPEC 2007-Y14 time-stamped "18:04 UT" - 2007 YG - see below
MPEC 2007-Y15 time-stamped "18:07 UT" - 2007 YH - see below
MPEC 2007-Y16 time-stamped "18:14 UT" - 2007 YJ - see below
MPEC 2007-Y17 time-stamped "18:18 UT" - 2007 YK - see below
MPEC 2007-Y18 time-stamped "19:18 UT" - 2007 YM

MPEC 2007-Y18 - "19:18 UT" - 2007 YM

K07Y00M 2007 YM (small asteroid, Earth MOID=1.0 LD, H=26.2 ~19m) was discovered at 0931 UT on 17 Dec. by the Catalina Sky Survey (CSS), which observed it at Dec. 17.40-44p8 and 17.52p4. This object is now within ten lunar distances (LD) of Earth, reaching 5.9 LD on 16 Dec.

MPEC 2007-Y17 - "18:18 UT" - 2007 YK

K07Y00K 2007 YK (H=17.5 ~1.07 km) was discovered at 0943 UT on 16 Dec. by the CSS, which observed it at Dec. 16.41-43p4 and 16.50-51p4. The discovery was confirmed by the Mt. Lemmon Survey (MLS) (Dec. 17.50-52p4).

MPEC 2007-Y16 - "18:14 UT" - 2007 YJ

K07Y00J 2007 YJ (borderline-small, H=21.8 ~148m) was discovered at 0737 UT on 16 Dec. by the MLS, which observed it at Dec. 16.32-34p4, 16.38-40p3, and 17.39-41p4.

MPEC 2007-Y15 - "18:07 UT" - 2007 YH

K07Y00H 2007 YH (H=20.1 ~323m) was discovered at 0733 UT on 16 Dec. by the CSS, which observed it at Dec. 16.32-34p4, 16.47p4, and 16.53p4. The discovery was confirmed by North Obs. (Dec. 16.85-86p6), Farra d'Isonzo Obs. (Dec. 16.96-97p3), Robert Hutsebaut via RAS Obs. Mayhill (Dec. 17.40p2), and MLS (Dec. 17.42-43p4).

MPEC 2007-Y14 - "18:04 UT" - 2007 YG

K07Y00G 2007 YG (risk-listed, H=23.2 ~78m) was discovered at 0434 UT on 16 Dec. by the Spacewatch 0.9m telescope, which observed it at Dec. 16.19-23p3. The discovery was confirmed by the Spacewatch 1.8m telescope (Dec. 17.36-37p3).

MPEC 2007-Y13 - "17:59 UT" - 2007 YF

K07Y00F 2007 YF (risk-listed, Earth MOID=5.8 LD, H=24.8 ~37m) was discovered at 0354 UT on 16 Dec. by the MLS, which observed it at Dec. 16.16-18p4, 16.24-26p4, and 17.32-33p4.

MPEC 2007-Y12 - "17:06 UT" - Observations of Comets

PK07V010 P/2007 V1 from Ageo Obs. (Dec. 11.68-69p2), Hiratsuka Obs. (Dec. 15.57-58p3), and Nazaret Obs. (Dec. 16.91-96p3)
CK07Q030 C/2007 Q3 (Siding Spring) from North Ryde Obs. (Dec. 7.53-56p2, 13.47-49p2 & 14.52-54p2) and Kambah Obs. (Dec. 17.57-58p2)
PK07H010 P/2007 H1 (McNaught) from Sabadell Obs. (Dec. 4.78p3), Vega del Thader Obs. (Dec. 9.81-82p4), Monte Deva Obs. (Dec. 12.87-88p5 & 14.90-91p5), and Linceo Obs. (Dec. 13.78-80p3)
CK07D010 C/2007 D1 (LINEAR) from Ageo Obs. (Dec. 14.82p1 & 15.78-80p2)
CK07B020 C/2007 B2 (Skiff) from Atlante Obs. (Dec. 15.19-26p4) and CSS (Dec. 17.50-52p4)
PK06W040 P/2006 W4 (Hill) from Piszkesteto Sta. (Dec. 4.98-99p3) and LINEAR (Dec. 14.19-24p5)
CK06W030 C/2006 W3 (Christensen) from La Fecha Obs. (Nov. 28.94p1, Dec. 1.00p1, 3.92p1 & 3.98p1), Montcabre Obs. (Dec. 10.92-93p3), Monte Deva Obs. (Dec. 12.06-07p4, 14.06-07p4 & 16.96-97p5), San Marcello Pistoiese Obs. (Dec. 13.75-77p3), and Moriyama Obs. (Dec. 16.66-67p2)
CK06S050 C/2006 S5 (Hill) from Monte Deva Obs. (Dec. 12.10p5, 13.04-05p5, 14.08-09p5 & 15.06-07p5), RAS Obs. Mayhill (Dec. 13.39-44p9), Balzaretto Obs. (Dec. 13.98-99p3), Mataro Obs. (Dec. 15.01-03p3), CSS (Dec. 15.36-38p4), Moriyama Obs. (Dec. 16.71-72p2), and CAST Obs. (Dec. 16.90p1)
CK06Q010 C/2006 Q1 (McNaught) from North Ryde Obs. (Dec. 7.59-61p2, 13.57p1, 13.63p1 & 14.56-59p2)
CK06O02F C/2006 OF2 (Broughton) from Sabadell Obs. (Dec. 4.76p3), Vega del Thader Obs. (Dec. 9.78p6), and Monte Deva Obs. (Dec. 12.83-84p5 & 14.87-89p5)
CK06M010 C/2006 M1 (LINEAR) from LINEAR (Dec. 10.19-24p5 & 15.19-24p5) and CSS (Dec. 14.19-21p4)
PK05Y020 P/2005 Y2 (McNaught) from LONEOS (Nov. 15.27-34p4 & Dec. 15.29-36p4)
CK05EH3L C/2005 EL173 (LONEOS) from North Ryde Obs. (Dec. 13.53-55p2) and Kambah Obs. (Dec. 17.59p1)
PK04F030 P/2004 F3 (NEAT) from Goodricke-Pigott Obs. (Dec. 14.15-17p2 & 15.14-16p2) and LONEOS (Dec. 16.26-32p4)
CK02V94Q C/2002 VQ94 (LINEAR) from Ageo Obs. (Dec. 7.86p1 & 8.85p2)
CJ95O010 C/1995 O1 (Hale-Bopp) from Australian Natl. Univ. 1m telescope (Oct. 20.73-74p2, 21.72-74p2 & 22.72p1)
0192 192P from Ageo Obs. (Dec. 1.36-37p3, 2.37p2, 15.37p2 & 16.39-40p3)
0191P 191P/McNaught from El Olivo Obs. (Dec. 1.01-02p3), Vega del Thader Obs. (Dec. 9.88-91p10), Montcabre Obs. (Dec. 11.81-82p3), Linceo Obs. (Dec. 13.86-87p3), LONEOS (Dec. 16.26-30p3), and Vicksburg Obs. (Dec. 17.20-21p2)
0190P 190P/Mueller from LINEAR (Dec. 10.26-31p3, 14.27-31p4 & 15.26-31p5)
0188P 188P/LINEAR-Mueller from Vega del Thader Obs. (Dec. 9.85-87p6) and LINEAR (Dec. 12.13-18p5 & 13.13-18p5)
0180P 180P/NEAT from CSS (Dec. 6.48-53p8) and Ageo Obs. (Dec. 14.79-80p2)
0143P 143P/Kowal-Mrkos from Spacewatch 0.9m (Dec. 4.39-42p3 & 16.38-42p3)
0139P 139P/Vaisala-Oterma from Pinsoro Obs. (Nov. 10.95-96p3) and LONEOS (Dec. 15.06-13p4)
0128P 128P/Shoemaker-Holt 1 from Vega del Thader Obs. (Dec. 9.08p3) and Moriyama Obs. (Dec. 16.70p2)
0124P 124P/Mrkos from Ageo Obs. (Nov. 16.69p2, 23.73-74p2 & Dec. 15.73p2)
0117P 117P/Helin-Roman-Alu 1 from Ageo Obs. (Nov. 23.58-59p2) and Carmelita Obs. (Dec. 10.86-88p3)
0116P 116P/Wild 4 from Ageo Obs. (Dec. 8.75p2) and LINEAR (Dec. 10.21-25p3 & 14.20-25p5)
0110P 110P/Hartley 3 from Vega del Thader Obs. (Dec. 9.99-00p4), Mt. Tuffley Obs. (Dec. 11.06-07p3), Monte Deva Obs. (Dec. 13.02-03p5), Capannoli Obs. (Dec. 13.89p2), Mataro Obs. (Dec. 14.96-99p3), Atlante Obs. (Dec. 15.85-89p3), LINEAR (Dec. 16.26-32p5), Moriyama Obs. (Dec. 16.69p2), CAST Obs. (Dec. 16.85p1), and Vicksburg Obs. (Dec. 17.25-26p2)
0093P 93P/Lovas 1 from AAAA Buenos Aires Obs. (Nov. 27.04-07p3), Sabadell Obs. (Dec. 4.76p2), Strawberry Field Obs. (Dec. 7.83-90p3), Carmelita Obs. (Dec. 10.81p3 & 16.85p3), Monte Deva Obs. (Dec. 10.97-99p5, 11.99-01p5, 12.89-90p5, 13.91-92p5, 14.95-96p5 & 16.91-92p5), Mt. Tuffley Obs. (Dec. 11.02-03p3), Montcabre Obs. (Dec. 11.79-80p3), Red Barn Obs. (Dec. 12.06-09p7), Moriyama Obs. (Dec. 16.60-61p2), Iturrieta Obs. (Dec. 16.83-84p3), and CAST Obs. (Dec. 16.91p1)
0079P 79P/du Toit-Hartley from MLS (Nov. 18.42-43p4) and Table Mtn. Obs. (Dec. 15.43-45p4 & 16.34-36p4)
0074P 74P/Smirnova-Chernykh from Posadas Obs. (Dec. 11.93-95p3), LINEAR (Dec. 14.26-31p5), Mataro Obs. (Dec. 14.87-89p3), Atlante Obs. (Dec. 15.90-92p3), and Vicksburg Obs. (Dec. 17.28-29p2)
0065P 65P/Gunn from Ageo Obs. (Dec. 8.79p2), Masquefa Obs. (Dec. 9.15-16p3), LINEAR (Dec. 16.39-44p5), and Petit Jean Mtn. South Obs. (PJMSO) (Dec. 17.35-37p6)
0050P 50P/Arend from Mt. Tuffley Obs. (Dec. 11.03-05p2), Terres Blanches Obs. (Dec. 12.71p1), Monte Deva Obs. (Dec. 13.92-94p5 & 14.96-97p5), Carmelita Obs. (Dec. 13.94p3), Hiratsuka Obs. (Dec. 15.55p3), Iturrieta Obs. (Dec. 16.80-81p2), and Nazaret Obs. (Dec. 16.86-87p3)
0046P 46P/Wirtanen from Sabadell Obs. (Dec. 4.75p3), Vega del Thader Obs. (Dec. 9.79-80p6), Linceo Obs. (Dec. 11.74-76p3, 13.74-76p3 & 16.74-76p3), Chante-Perdrix Obs. (Dec. 13.72-73p3), Hamamatsu-Yuto Obs. (Dec. 15.37p2), Monte Deva Obs. (Dec. 16.84-85p5), and Vicksburg Obs. (Dec. 17.03p2)
0029P 29P/Schwassmann-Wachmann 1 from Vega del Thader Obs. (Dec. 10.00p5), Montcabre Obs. (Dec. 10.90-91p3), Posadas Obs. (Dec. 11.98-00p3), LINEAR (Dec. 13.27-32p5), Chante-Perdrix Obs. (Dec. 13.81-82p3, 15.79-84p6 & 16.78p2), Gualba Obs. (Dec. 13.82p3 & 16.04-05p3), Capannoli Obs. (Dec. 13.90-91p2), Atlante Obs. (Dec. 14.97-98p3 & 15.97-99p3), Moriyama Obs. (Dec. 16.67-68p2), CAST Obs. (Dec. 16.85p1), and Vicksburg Obs. (Dec. 17.31-32p2)
0017P 17P/Holmes from Moletai Obs. (Nov. 5.68-76p6 & 28.74-77p7), Herne Obs. (Dec. 1.71-72p2), Sabadell Obs. (Dec. 4.77p3), Vega del Thader Obs. (Dec. 9.98-99p10 & 14.95p9), Nazaret Obs. (Dec. 10.01p1, 11.96-97p3, 15.84-85p3 & 16.83-85p3), Montcabre Obs. (Dec. 10.89-90p3, 11.85-86p3 & 16.81p3), Monte Deva Obs. (Dec. 11.06p3, 12.03-04p5, 12.00-01p5, 13.95-96p5, 15.01-02p5 & 16.94-95p5), Hamamatsu-Yuto Obs. (Dec. 11.57-58p4, 14.56-57p2 & 15.44-45p3), Terres Blanches Obs. (Dec. 12.71p1), Chante-Perdrix Obs. (Dec. 12.74-75p3, 13.79-80p3, 14.71-74p6, 15.73-75p4 & 16.72-74p6), Gualba Obs. (Dec. 13.81p3 & 16.05p3), Carmelita Obs. (Dec. 13.91p3 & 16.89-90p3), Atlante Obs. (Dec. 14.91-92p3), Montana Blanca Obs. (Dec. 15.80-82p2), Moriyama Obs. (Dec. 16.64-65p2), Iturrieta Obs. (Dec. 16.78p3), CAST Obs. (Dec. 16.91p1), and PJMSO (Dec. 17.04-07p8)
0008P 8P/Tuttle from Herne Obs. (Dec. 1.82-83p2), Sabadell Obs. (Dec. 4.74p3), Xingming Obs. (Dec. 10.64p2), Remanzacco Obs. (Dec. 10.88p3), Montcabre Obs. (Dec. 11.84p3), Monte Deva Obs. (Dec. 12.04-05p5, 14.04-05p5, 15.03-05p5 & 16.97-98p5), Chante-Perdrix Obs. (Dec. 12.76-77p2), Carmelita Obs. (Dec. 13.92p3 & 16.82p3), Hamamatsu-Yuto Obs. (Dec. 14.44-46p4 & 15.39-40p5), San Vito Obs. (Dec. 14.72p3), Hiratsuka Obs. (Dec. 15.54p3), RAS Mayhill (Dec. 16.16p2), and CAST Obs. (Dec. 16.92p1)

MPEC 2007-Y11 - "16:49 UT" - Comet C/2007 W3 (LINEAR)

CK07W030 C/2007 W3 (i=78.7°, q=1.776 AU, TP=2008 June 2.806 TT) from Montcabre Obs. (Dec. 10.94-95p3), Ageo Obs. (Dec. 15.67-68p3), and Montana Blanca Obs. (Dec. 16.87-88p2)

MPEC 2007-Y10 - "16:41 UT" - Comet C/2007 W1 (Boattini)

CK07W010 C/2007 W1 (i=9.9°, q=0.853 AU, TP=2008 June 25.152 TT) from North Ryde Obs. (Dec. 14.69p2) and CSS (Dec. 16.47-49p4)

MPEC 2007-Y09 - "16:37 UT" - Comet C/2007 U1 (LINEAR)

CK07U010 C/2007 U1 (LINEAR) (i=157.8°, q=3.329 AU, Q=11421.668 AU, TP=2008 Aug. 7.22739 TT) from LINEAR (Dec. 14.26-30p5), Atlante Obs. (Dec. 14.00-02p3), and Nazaret Obs. (Dec. 15.03-05p3)

MPEC 2007-Y08 - "16:33 UT" - Comet P/2007 T6 (Catalina)

PK07T060 P/2007 T6 (Catalina) (q=2.232 AU, Q=6.751 AU, TP=2007 Aug. 19.66798 TT) from LINEAR (Dec. 16.39-44p5) and PJMSO (Dec. 17.34-35p6)

MPEC 2007-Y07 - "16:26 UT" - Comet C/2007 T5 (Gibbs)

CK07T050 C/2007 T5 (Gibbs) (i=45.6°, q=4.049 AU, Q=89.467 AU, TP=2008 May 24.17653 TT) from Vega del Thader Obs. (Dec. 9.09p4), LINEAR (Dec. 13.33-38p5 & 16.33-39p5), Atlante Obs. (Dec. 15.05-08p3), and Nazaret Obs. (Dec. 15.98-01p3)

MPEC 2007-Y06 - "16:17 UT" - Comet P/2007 T2 (Kowalski)

PK07T020 P/2007 T2 (Kowalski) (q=0.696 AU, Q=5.484 AU, TP=2007 Sept. 19.02181 TT) from Paus Obs. (Dec. 14.08p1), Nazaret Obs. (Dec. 15.16-17p3), and CSS (Dec. 16.35-37p4)

<< DOU on 17 Dec. '07 >> MPEC 2007-Y05 - "07:11 UT" - Daily Orbit Update

Observations of risk-listed objects
K07X18F 2007 XF18 (i=59.0°, arc=4 days, H=20.6 ~257m) from Desert Moon Obs. (Dec. 16.22-24p3)
K07X09Z 2007 XZ9 (small asteroid, arc=12 days, H=24.8 ~37m) from Spacewatch 1.8m (Dec. 16.42-43p3)
Observations of recently (no longer) risk-listed objects
K07W55E 2007 WE55 (arc=18 days, H=20.1 ~323m) from Beaconsfield Obs. (Dec. 16.80p1 & 16.85-88p2)
Observations of small asteroids (H>22.0)
K07X23W 2007 XW23 (arc=1 day, H=25.8 ~23m) from Great Shefford Obs. (Dec. 16.05-06p2)
K07X23T 2007 XT23 (Q=4.563 AU, arc=1 day, H=22.5 ~107m) from MLS (Dec. 16.27-28p4)
K07W04Z 2007 WZ4 (arc=26 days, H=24.3 ~47m) from MLS (Dec. 16.35-37p4)
K07V03H 2007 VH3 (arc=44 days, H=22.5 ~107m) from Desert Moon Obs. (Dec. 16.26-29p3)
K05C00N 2005 CN (arc=4 opp, H=22.9 ~89m) from MLS (Dec. 16.34-37p4)
Observations of other objects
K07X10C 2007 XC10 (i=48.0°, arc=11 days, H=19.4 ~446m) from Desert Moon Obs. (Dec. 16.33p1)
K07W55F 2007 WF55 (arc=16 days, H=19.0 ~537m) from La Fecha Obs. (Dec. 16.96-00p2 & 17.07p1)
K07VI4G 2007 VG184 (arc=35 days, H=17.4 ~1.12 km) from Desert Moon Obs. (Dec. 16.05-09p3)
K07V04Q 2007 VQ4 (arc=43 days, H=15.9 ~2.24 km, q=1.271 AU) from PJMSO (Dec. 16.48-49p8) and Hamamatsu-Yuto Obs. (Dec. 16.71-74p5)
K07P11U 2007 PU11 (Q=4.384 AU, arc=3 opp, H=16.3 ~1.86 km) from Hamamatsu-Yuto Obs. (Dec. 16.52-54p5)
K05X01D 2005 XD1 (arc=2 opp, H=19.1 ~513m) from La Fecha Obs. (Dec. 17.03-09p3)
K05W56J 2005 WJ56 (arc=3 opp, H=17.9 ~891m) from Farra d'Isonzo Obs. (Dec. 17.07p2)
K04X35J 2004 XJ35 (arc=2 opp, H=20.3 ~295m) from Desert Moon Obs. (Dec. 16.12-19p3)
K04BC1G 2004 BG121 (arc=3 opp, H=19.0 ~537m) from Spacewatch 1.8m (Dec. 16.36-37p3)
K03B84H 2003 BH84 (arc=2 opp, H=16.9 ~1.41 km) from Hamamatsu-Yuto Obs. (Dec. 16.55-58p4)
K02X04Y 2002 XY4 (i=43.1°, arc=3 opp, H=19.0 ~537m) from PJMSO (Dec. 16.51p1)
H0502 170502 2003 WM7 from LONEOS (Dec. 15.17-25p4)
G3902 163902 2003 SW222 from CSS (Dec. 16.11-13p3)
G2142 162142 1998 VR from CSS (Dec. 16.14-16p4)
E3404 143404 2003 BD44 from Spacewatch 0.9m (Dec. 16.38-42p3)
96189 96189 1991 NT3 from LONEOS (Dec. 15.46-53p4) and PJMSO (Dec. 16.49-50p5)
90403 90403 2003 YE45 from PJMSO (Dec. 16.47-48p4)
68359 68359 2001 OZ13 from Hamamatsu-Yuto Obs. (Dec. 16.62p3)
66251 66251 1999 GJ2 from LONEOS (Dec. 16.34-41p4)
21374 21374 1997 WS22 from LONEOS (Dec. 16.20-25p4)
07889 7889 1994 LX from E. Guido via RAS Obs. Mayhill (Dec. 16.49-52p3)
03553 3553 Mera (1985 JA) from LONEOS (Dec. 16.12-16p3)
03288 3288 Seleucus (1982 DV) from LONEOS (Dec. 16.42-46p4)
02212 2212 Hephaistos (1978 SB) from LONEOS (Dec. 15.17-25p4)
01864 1864 Daedalus (1971 FA) from LINEAR (Dec. 16.49-51p3)
01862 1862 Apollo (1932 HA) from LONEOS (Dec. 16.49-54p4)

Observers on 17 December '07

A total of 57 observing facilities appear in today's MPECs.

Code	Observer / observatory
`834`	AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2007-Y12 -- 93P
`349`	Ageo Obs. in Japan, 10 in MPECs 2007-Y11 & 2007-Y12 -- C/2007 W3, P/2007 V1, C/2007 D1, C/2002 VQ94, 192P, 180P, 124P, 117P, 116P, 65P
`J51`	Atlante Obs. in the Canary Islands, 7 in MPECs 2007-Y07, 2007-Y09 & 2007-Y12 -- C/2007 U1, C/2007 T5, C/2007 B2, 110P, 74P, 29P, 17P
`413`	Australian Natl. Univ. 1m telescope in New South Wales, 1 in MPEC 2007-Y12 -- C/1995 O1
`A81`	Balzaretto Obs. in Italy, 1 in MPEC 2007-Y12 -- C/2006 S5
`J92`	Beaconsfield Obs. in England, 1 in MPEC 2007-Y05 -- 2007 WE55
`235`	CAST Obs. in Italy, 6 in MPEC 2007-Y12 -- C/2006 S5, 110P, 93P, 29P, 17P, 8P
`B09`	Capannoli Obs. in Italy, 2 in MPEC 2007-Y12 -- 110P, 29P
`B20`	Carmelita Obs. in Spain, 5 in MPEC 2007-Y12 -- 117P, 93P, 50P, 17P, 8P
`703`	Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2007-Y05, 2007-Y06, 2007-Y10, 2007-Y12, 2007-Y15, 2007-Y17 & 2007-Y18 -- 2007 YM, 2007 YK, 2007 YH, C/2007 W1, P/2007 T2, C/2007 B2, C/2006 S5, C/2006 M1, 163902, 162142, 180P
`A77`	Chante-Perdrix Obs. in France, 4 in MPEC 2007-Y12 -- 46P, 29P, 17P, 8P
`448`	Desert Moon Obs. in New Mexico, 5 in MPEC 2007-Y05 -- 2007 XF18, 2007 XC10, 2007 VH3, 2007 VG184, 2004 XJ35
`J36`	El Olivo Obs., 1 in MPEC 2007-Y12 -- 191P
`595`	Farra d'Isonzo Obs. in Italy, 2 in MPECs 2007-Y05 & 2007-Y15 -- 2007 YH, 2005 WJ56
`683`	Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2007-Y12 -- P/2004 F3
`J95`	Great Shefford Obs. in England, 1 in MPEC 2007-Y05 -- 2007 XW23
`442`	Gualba Obs. in Spain, 2 in MPEC 2007-Y12 -- 29P, 17P
`379`	Hamamatsu-Yuto Obs. in Japan, 7 in MPECs 2007-Y05 & 2007-Y12 -- 2007 VQ4, 2007 PU11, 2003 BH84, 68359, 46P, 17P, 8P
`A18`	Herne Obs. in Germany, 2 in MPEC 2007-Y12 -- 17P, 8P
`D88`	Hiratsuka Obs., 3 in MPEC 2007-Y12 -- P/2007 V1, 50P, 8P
`J44`	Iturrieta Obs. in Spain, 3 in MPEC 2007-Y12 -- 93P, 50P, 17P
`415`	Kambah Obs. in Australia, 2 in MPEC 2007-Y12 -- C/2007 Q3, C/2005 EL173
`704`	LINEAR in New Mexico, 13 in MPECs 2007-Y05, 2007-Y07, 2007-Y08, 2007-Y09 & 2007-Y12 -- C/2007 U1, P/2007 T6, C/2007 T5, P/2006 W4, C/2006 M1, 1864, 190P, 188P, 116P, 110P, 74P, 65P, 29P
`699`	LONEOS in Arizona, 12 in MPECs 2007-Y05 & 2007-Y12 -- P/2005 Y2, P/2004 F3, 96189, 66251, 21374, 170502, 3553, 3288, 2212, 1862, 191P, 139P
`J34`	La Fecha Obs., 3 in MPECs 2007-Y05 & 2007-Y12 -- 2007 WF55, C/2006 W3, 2005 XD1
`J59`	Linceo Obs. in Spain, 3 in MPEC 2007-Y12 -- P/2007 H1, 191P, 46P
`232`	Masquefa Obs. in Spain, 1 in MPEC 2007-Y12 -- 65P
`A06`	Mataro Obs. in Spain, 3 in MPEC 2007-Y12 -- C/2006 S5, 110P, 74P
`152`	Moletai Obs. in Lithuania, 1 in MPEC 2007-Y12 -- 17P
`J46`	Montana Blanca Obs. in the Canary Islands, 2 in MPECs 2007-Y11 & 2007-Y12 -- C/2007 W3, 17P
`213`	Montcabre Obs. in Spain, 7 in MPECs 2007-Y11 & 2007-Y12 -- C/2007 W3, C/2006 W3, 191P, 93P, 29P, 17P, 8P
`945`	Monte Deva Obs. in Spain, 10 in MPEC 2007-Y12 -- P/2007 H1, C/2006 W3, C/2006 S5, C/2006 OF2, 110P, 93P, 50P, 46P, 17P, 8P
`900`	Moriyama Obs. in Japan, 7 in MPEC 2007-Y12 -- C/2006 W3, C/2006 S5, 128P, 110P, 93P, 29P, 17P
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2007-Y05, 2007-Y12, 2007-Y13, 2007-Y15, 2007-Y16 & 2007-Y17 -- 2007 YK, 2007 YJ, 2007 YH, 2007 YF, 2007 XT23, 2007 WZ4, 2005 CN, 79P
`J93`	Mt. Tuffley Obs. in England, 3 in MPEC 2007-Y12 -- 110P, 93P, 50P
`J47`	Nazaret Obs. in Spain, 6 in MPECs 2007-Y06, 2007-Y07, 2007-Y09 & 2007-Y12 -- P/2007 V1, C/2007 U1, C/2007 T5, P/2007 T2, 50P, 17P
`J69`	North Obs. in England, 1 in MPEC 2007-Y15 -- 2007 YH
`423`	North Ryde Obs. in New South Wales, 4 in MPECs 2007-Y10 & 2007-Y12 -- C/2007 W1, C/2007 Q3, C/2006 Q1, C/2005 EL173
`B49`	Paus Obs. in Spain, 1 in MPEC 2007-Y06 -- P/2007 T2
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 7 in MPECs 2007-Y05, 2007-Y08 & 2007-Y12 -- 2007 VQ4, P/2007 T6, 2002 XY4, 96189, 90403, 65P, 17P
`J52`	Pinsoro Obs. in Spain, 1 in MPEC 2007-Y12 -- 139P
`561`	Piszkesteto Sta. in Hungary, 1 in MPEC 2007-Y12 -- P/2006 W4
`J53`	Posadas Obs. in Spain, 2 in MPEC 2007-Y12 -- 74P, 29P
`H06`	RAS Obs. Mayhill in New Mexico, 2 in MPEC 2007-Y12 -- C/2006 S5, 8P
`H06%`	E. Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2007-Y05 -- 7889
`H062`	Robert Hutsebaut in Belgium via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2007-Y15 -- 2007 YH
`H68`	Red Barn Obs. in Georgia, 1 in MPEC 2007-Y12 -- 93P
`473`	Remanzacco Obs. in Italy, 1 in MPEC 2007-Y12 -- 8P
`619`	Sabadell Obs. in Spain, 6 in MPEC 2007-Y12 -- P/2007 H1, C/2006 OF2, 93P, 46P, 17P, 8P
`104`	San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2007-Y12 -- C/2006 W3
`233`	San Vito Obs. in Italy, 1 in MPEC 2007-Y12 -- 8P
`691`	Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2007-Y05, 2007-Y12 & 2007-Y14 -- 2007 YG, 143404, 143P
`291`	Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2007-Y05 & 2007-Y14 -- 2007 YG, 2007 XZ9, 2004 BG121
`J88`	Strawberry Field Obs. in England, 1 in MPEC 2007-Y12 -- 93P
`673`	Table Mtn. Obs. in southern California, 1 in MPEC 2007-Y12 -- 79P
`B26`	Terres Blanches Obs. in France, 2 in MPEC 2007-Y12 -- 50P, 17P
`J70`	Vega del Thader Obs. in Spain, 10 in MPECs 2007-Y07 & 2007-Y12 -- C/2007 T5, P/2007 H1, C/2006 OF2, 191P, 188P, 128P, 110P, 46P, 29P, 17P
`H47`	Vicksburg Obs. in Mississippi, 5 in MPEC 2007-Y12 -- 191P, 110P, 74P, 46P, 29P
`C42`	Xingming Obs. in China, 1 in MPEC 2007-Y12 -- 8P

Impact Risk Monitoring on 17 December '07

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2354 UTC)
See the CRT page for a list of all objects rated recently as risks.
Note that the time horizon for JPL is 100 years from today and for NEODyS is now usually the year 2090.
For the latest official risk assessments, and for explanations of the terminology, 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 YG	JPL Sentry	2234	2014-2103	50	5.4e-08	-6.37	-6.66	0	JPL: "Analysis based on 6 observations spanning 1.1808 days (2007-Dec-16.19045 to 2007-Dec-17.37129)." Diameter approximately 0.063 km. from mean, weighted H=23.7.

2007 YF	JPL Sentry	2159	2026-2077	7	4.6e-08	-7.03	-7.39	0	JPL: "Analysis based on 12 observations spanning 1.1641 days (2007-Dec-16.16288 to 2007-Dec-17.32699)." Diameter approximately 0.042 km. from mean, weighted H=24.5.

2007 XF18	JPL Sentry	1703	2015-2089	2	1.2e-09	-5.64	-5.66	0	JPL: "Analysis based on 23 observations spanning 4.0306 days (2007-Dec-12.20514 to 2007-Dec-16.23571)." Diameter approximately 0.260 km. from mean, weighted H=20.5.

2007 XZ9	NEODyS	2003	2056-2089	5	1.59e-06	-5.74	-6.00	0	NEODyS: "Based on 38 optical observations (of which 0 are rejected as outliers) from 2007/12/04.195 to 2007/12/16.430."
2007 XZ9	JPL Sentry	1703	2056-2089	4	1.6e-06	-5.74	-5.98	0	JPL: "Analysis based on 38 observations spanning 12.235 days (2007-Dec-04.19408 to 2007-Dec-16.42884)." Diameter approximately 0.037 km. from mean, weighted H=24.8.

2007 VK184	JPL Sentry	2002	2048-2057	5	2.4e-04	-1.99	-1.99	1	JPL: "Analysis based on 93 observations spanning 34.035 days (2007-Nov-12.13904 to 2007-Dec-16.17447)." Diameter approximately 0.130 km. from mean, weighted H=22.0.

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 17 December '07

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

2233	Noted that JPL Sentry has posted 2007 YG as an impact risk - see above
2159	Noted that JPL Sentry has posted 2007 YF as an impact risk - see above
2003	Noted that NEODyS has updated its 2007 XZ9 risk assessment - see above
2002	Noted that JPL Sentry has updated its 2007 VK184 risk assessment - see above
1934	Grabbed MPEC 2007-Y18 - 2007 YM - see above
1824	Grabbed MPEC 2007-Y14 - 2007 YG - see above Grabbed MPEC 2007-Y15 - 2007 YH - see above Grabbed MPEC 2007-Y16 - 2007 YJ - see above Grabbed MPEC 2007-Y17 - 2007 YK - see above
1804	Grabbed MPEC 2007-Y13 - 2007 YF - see above
1723	Grabbed MPEC 2007-Y12 - Observations of Comets - see above
1703	Noted that JPL Sentry has updated its 2007 XF18 risk assessment - see above Noted that JPL Sentry has updated its 2007 XZ9 risk assessment - see above Grabbed MPEC 2007-Y10 - Comet C/2007 W1 (Boattini) - see above Grabbed MPEC 2007-Y11 - Comet C/2007 W3 (LINEAR) - see above
1642	Grabbed MPEC 2007-Y06 - Comet P/2007 T2 (Kowalski) - see above Grabbed MPEC 2007-Y07 - Comet C/2007 T5 (Gibbs) - see above Grabbed MPEC 2007-Y08 - Comet P/2007 T6 (Catalina) - see above Grabbed MPEC 2007-Y09 - Comet C/2007 U1 (LINEAR) - see above
1412	Grabbed MPEC 2007-Y05 - Daily Orbit Update - see above

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