2007-12-10 Tracking News

Contents on 10 December '07

IAU Minor Planet Center
- NEOCP Activity -- four listings: 3 new, 1 updated
- New MPECs -- eleven MPECs
- Observers -- 54 observing facilities
Impact Risk Monitoring -- one object
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 10 December '07

The MPC's NEO Confirmation Page has 4 listings: 3 new, 1 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and one updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of seven 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 10 December '07

Minor Planet Electronic Circulars

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

MPEC 2007-X40 time-stamped "07:10 UT" - Daily Orbit Update - see below
MPEC 2007-X41 time-stamped "15:24 UT" - 2007 XH16 - see below
MPEC 2007-X42 time-stamped "16:08 UT" - Comet P/2007 T2 (Kowalski) - see below
MPEC 2007-X43 time-stamped "16:11 UT" - Comet C/2007 T5 (Gibbs) - see below
MPEC 2007-X44 time-stamped "16:18 UT" - Comet P/2007 T6 (Catalina) - see below
MPEC 2007-X45 time-stamped "16:22 UT" - Comet C/2007 U1 (LINEAR) - see below
MPEC 2007-X46 time-stamped "16:25 UT" - Comet P/2007 V2 (Hill) - see below
MPEC 2007-X47 time-stamped "16:29 UT" - Comet C/2007 W1 (Boattini) - see below
MPEC 2007-X48 time-stamped "16:33 UT" - Comet C/2007 W3 (LINEAR) - see below
MPEC 2007-X49 time-stamped "16:54 UT" - Observations of Comets - see below
MPEC 2007-X50 time-stamped "17:46 UT" - 2007 XJ16

MPEC 2007-X50 - "17:46 UT" - 2007 XJ16

K07X16J 2007 XJ16 (risk-listed, Q=5.244 AU, H=19.3 ~467m) was discovered at 0911 UT on 5 Dec. by the Spacewatch 0.9m telescope, which observed it at Dec. 5.38-42p3 and 6.30-31p2. The discovery was confirmed by the Spacewatch 1.8m telescope (Dec. 5.53-54p3) and Astronomical Research Obs. (ARO) (Dec. 6.34-36p3).

MPEC 2007-X49 - "16:54 UT" - Observations of Comets

PK07W020 P/2007 W2 from Lumezzane Obs. (Dec. 4.96-97p4), Piszkesteto Sta. (Dec. 5.02-03p3), Montana Blanca Obs. (Dec. 6.86p1), Montcabre Obs. (Dec. 6.98-99p4), and Nazaret Obs. (Dec. 6.99-00p3)
PK07V010 P/2007 V1 from LINEAR (Dec. 3.26-31p5), Nazaret Obs. (Dec. 6.91-92p3), Montana Blanca Obs. (Dec. 7.84-89p3), and Montcabre Obs. (Dec. 9.94-95p3)
CK07S020 C/2007 S2 (Lemmon) from LONEOS (Nov. 11.45-51p4), Kiev Comet Station (Nov. 30.10p1), Lumezzane Obs. (Dec. 5.12-13p4), Piszkesteto Sta. (Dec. 6.01p3), and Vega del Thader Obs. (Dec. 9.11p4)
PK07R010 P/2007 R1 (Larson) from Schiaparelli Obs. (Oct. 22.91p1 & 22.96p1) and Nazaret Obs. (Dec. 4.86-88p3)
CK07Q030 C/2007 Q3 (Siding Spring) from North Ryde Obs. (Dec. 2.59-61p2) and Kambah Obs. (Dec. 4.62-63p2 & 7.45-46p2)
PK07H010 P/2007 H1 (McNaught) from Alginet Obs. (Dec. 1.78p1), Kambah Obs. (Dec. 4.60p2), Monte Deva Obs. (Dec. 4.82-83p5 & 6.88-90p5), Carmelita Obs. (Dec. 5.88-90p3), Rodeno Obs. (Dec. 5.88-90p3 & 6.83-84p3), El Olivo Obs. (Dec. 6.81-82p3), and CAST Obs. (Dec. 8.78p1)
CK07E010 C/2007 E1 (Garradd) from Panker Obs. (Nov. 7.95-96p2) and LINEAR (Dec. 3.12-17p5)
PK07C020 P/2007 C2 (Catalina) from LONEOS (Dec. 4.35-38p2 & 4.43p1) and Ageo Obs. (Dec. 5.70-71p3 & 6.71-72p2)
CK07B020 C/2007 B2 (Skiff) from Ageo Obs. (Nov. 30.86p2) and Masquefa Obs. (Dec. 9.18-19p3)
CK06W030 C/2006 W3 (Christensen) from El Olivo Obs. (Nov. 30.92-93p3), Alginet Obs. (Dec. 1.81-84p3), Rodeno Obs. (Dec. 5.99-00p3), Masquefa Obs. (Dec. 8.02-03p3), and Mataro Obs. (Dec. 9.81-82p3)
CK06S050 C/2006 S5 (Hill) from La Murta Obs. (Nov. 30.98p3), Rodeno Obs. (Nov. 30.99-00p3 & Dec. 6.96-98p3), Vega del Thader Obs. (Dec. 2.99p3), LONEOS (Dec. 4.35-40p3), LINEAR (Dec. 5.33-36p3), Monte Deva Obs. (Dec. 6.05p4 & 7.05-06p5), El Olivo Obs. (Dec. 6.11-12p3), and Masquefa Obs. (Dec. 8.08-09p3 & 9.12-13p3)
CK06Q010 C/2006 Q1 (McNaught) from Kambah Obs. (Nov. 13.60-61p2 & Dec. 4.67p2)
CK06O02F C/2006 OF2 (Broughton) from Alginet Obs. (Dec. 1.74-77p3), Monte Deva Obs. (Dec. 4.80-81p5 & 6.85-86p5), San Vito Obs. (Dec. 6.73-74p3), and CAST Obs. (Dec. 8.77p1)
CK06M010 C/2006 M1 (LINEAR) from Panker Obs. (Nov. 7.93-94p3), Ageo Obs. (Nov. 25.50-51p2), and LONEOS (Dec. 5.11-19p4)
CK06K030 C/2006 K3 (McNaught) from Ageo Obs. (Nov. 17.76-77p2) and Lumezzane Obs. (Dec. 4.81p1)
CK06K010 C/2006 K1 (McNaught) from Ageo Obs. (Nov. 24.60-61p3) and Kambah Obs. (Dec. 7.57-58p2)
PK04F030 P/2004 F3 (NEAT) from Goodricke-Pigott Obs. (Dec. 4.18-20p2 & 6.17-20p3)
0192 192P from the Siding Spring Survey (SSS) (Oct. 12.44-47p4) and Kambah Obs. (Dec. 7.51-52p2)
0190P 190P/Mueller from Buchloe Obs. (Oct. 31.84p3) and Spacewatch 0.9m (Dec. 6.19-22p3)
0188P 188P/LINEAR-Mueller from Alginet Obs. (Dec. 1.78-79p3), Goodricke-Pigott Obs. (Dec. 3.06-09p3 & 4.06-09p3), and Masquefa Obs. (Dec. 8.84-85p3)
0173P 173P/Mueller 5 from the Mt. Lemmon Survey (MLS) (Nov. 21.33-34p4), Ageo Obs. (Nov. 21.76p2), Spacewatch 0.9m (Dec. 4.51-54p3), LINEAR (Dec. 6.35-40p5), and Masquefa Obs. (Dec. 9.06-09p3)
0172P 172P/Yeung from 7300 Obs. (Nov. 15.41-51p15) and Ageo Obs. (Dec. 7.78-79p3)
0150P 150P/LONEOS from Buchloe Obs. (Nov. 28.77p3), MLS (Dec. 4.19-21p4), and Chante-Perdrix Obs. (Dec. 5.78-80p3)
0128P 128P/Shoemaker-Holt 1 from LONEOS (Dec. 4.36-44p4), LINEAR (Dec. 4.38-43p5), and Spacewatch 0.9m (Dec. 6.41-45p3)
0110P 110P/Hartley 3 from Panker Obs. (Nov. 2.93p1 & 22.96-98p3), Szeged Obs. (Nov. 28.84-85p5), Hamamatsu-Yuto Obs. (Dec. 2.62-63p5, 3.60-61p3, 5.62-63p3, 7.55-56p2 & 8.62-63p2), Vega del Thader Obs. (Dec. 2.98p4 & 8.01p9), Montcabre Obs. (Dec. 4.89-91p3), Ametlla del Valles Obs. (Dec. 4.99-00p2 & 6.99p1), Monte Deva Obs. (Dec. 6.01p5 & 6.98-99p5), CAST Obs. (Dec. 8.81p1), and Capannoli Obs. (Dec. 8.93-95p3)
0108P 108P/Ciffreo from MLS (Nov. 21.37-38p4) and Lumezzane Obs. (Dec. 5.13-15p4)
0093P 93P/Lovas 1 from Panker Obs. (Nov. 11.84-91p4), Vega del Thader Obs. (Dec. 2.84-86p13, 7.88-91p16 & 8.81p11), Moriyama Obs. (Dec. 3.58-59p2), Carmelita Obs. (Dec. 4.85p3 & 5.81p3), Monte Deva Obs. (Dec. 5.06-07p5, 5.97-98p5 & 6.94-95p5), Rodeno Obs. (Dec. 5.92-94p3 & 6.85-86p3), Hamamatsu-Yuto Obs. (Dec. 6.51-52p2), Guadarrama Obs. (Dec. 6.98-99p3), Montcabre Obs. (Dec. 7.82-83p3), Isle of Man Obs. (Dec. 7.85p1), CAST Obs. (Dec. 8.78p1), and Masquefa Obs. (Dec. 8.94p3)
0074P 74P/Smirnova-Chernykh from El Olivo Obs. (Dec. 1.04-05p3), MLS (Dec. 4.35-37p4), Ametlla del Valles Obs. (Dec. 5.01p1 & 5.99p1), LINEAR (Dec. 5.26-31p5), Masquefa Obs. (Dec. 8.99-01p3), and Vega del Thader Obs. (Dec. 9.05p3)
0070P 70P/Kojima from Ageo Obs. (Nov. 23.77p2) and LONEOS (Dec. 5.40-47p4)
0050P 50P/Arend from Panker Obs. (Nov. 2.88-90p3 & 7.90-91p3), Kiev Comet Station (Nov. 29.97-98p4 & 30.05p1), Cesson Obs. (Dec. 3.81-82p2), Carmelita Obs. (Dec. 4.87p3), Hamamatsu-Yuto Obs. (Dec. 5.61p3), Terres Blanches Obs. (Dec. 5.74p1), Nazaret Obs. (Dec. 7.82-84p3), Montcabre Obs. (Dec. 7.90-91p3), Masquefa Obs. (Dec. 7.96-98p3), Vega del Thader Obs. (Dec. 7.97p7), and CAST Obs. (Dec. 8.79p1)
0046P 46P/Wirtanen from Ageo Obs. (Nov. 17.46p2, 25.44p2 & Dec. 1.40p3), Geisei Obs. (Nov. 30.39p1), Monte Deva Obs. (Dec. 4.81-82p5 & 6.87-88p3), and CAST Obs. (Dec. 8.77p1)
0029P 29P/Schwassmann-Wachmann 1 from Panker Obs. (Nov. 2.96p2, 7.97p2 & 22.92-94p3), Ageo Obs. (Nov. 18.72-73p3), Carmelita Obs. (Dec. 4.91-92p3), Ametlla del Valles Obs. (Dec. 4.98-99p3), Monte Deva Obs. (Dec. 5.09p5, 6.06-07p5 & 7.02-03p5), Gualba Obs. (Dec. 5.23-24p2 & 7.92p4), Rodeno Obs. (Dec. 5.96-97p3 & 6.94-96p3), El Olivo Obs. (Dec. 5.99-00p3 & 6.87-89p3), Montcabre Obs. (Dec. 6.93p3), Guadarrama Obs. (Dec. 7.01-02p3), Vega del Thader Obs. (Dec. 8.02p4 & 9.06p6), Masquefa Obs. (Dec. 8.06-07p2 & 9.02-03p3), Hamamatsu-Yuto Obs. (Dec. 8.63-64p2), CAST Obs. (Dec. 8.82p1), and Capannoli Obs. (Dec. 8.96p2)
0017P 17P/Holmes from Geisei Obs. (Nov. 7.62p1, 9.61-62p2, 10.73p1, 12.64p1, 14.66p1, 17.63p1, 19.65p1 & 30.43-44p2), Alginet Obs. (Nov. 30.90p3, Dec. 1.79-80p2 & 5.83p3), Hamamatsu-Yuto Obs. (Dec. 2.61p3, 3.62p3, 5.60p3, 7.57p4 & 8.61-62p4), Moriyama Obs. (Dec. 3.62-63p2), Green Island Obs. (Dec. 3.68p1, 3.74-77p2 & 7.68-72p2), Chante-Perdrix Obs. (Dec. 3.75-78p6, 4.74-76p3, 5.75-76p3, 6.72-73p3 & 7.76-77p3), Cesson Obs. (Dec. 3.79-83p3), Nazaret Obs. (Dec. 3.88-89p3, 5.89p3, 6.85-87p3 & 7.88-90p2), Petit Jean Mtn. South Obs. (PJMSO) (Dec. 4.09-10p8, 5.22-23p8 & 6.10-11p8), Gualba Obs. (Dec. 4.78-79p3 & 7.91p4), Montcabre Obs. (Dec. 4.86-87p3, 5.90-91p3, 6.90-91p3, 7.88-89p3, 8.92-93p3 & 9.92-93p3), Carmelita Obs. (Dec. 4.88p3), Monte Deva Obs. (Dec. 5.03-05p5, 5.90-91p5, 6.91p5 & 8.91-92p5), RAS Obs. Mayhill (Dec. 5.39-40p2), Terres Blanches Obs. (Dec. 5.73p1), El Olivo Obs. (Dec. 5.96-97p3 & 6.85-86p3), Rodeno Obs. (Dec. 6.01p3 & 6.88-89p3), Great Shefford Obs. (Dec. 6.05p1 & 7.95p1), Piszkesteto Sta. (Dec. 6.06p1), Guadarrama Obs. (Dec. 6.94-98p2), Masia Cal Maciarol Modul 1 (MCM1) (Dec. 7.79p3), Isle of Man Obs. (Dec. 7.85p1), Vega del Thader Obs. (Dec. 7.92p1), Masquefa Obs. (Dec. 7.99-00p3 & 8.97-98p3), CAST Obs. (Dec. 8.80p1), and Mataro Obs. (Dec. 9.78-79p3)
0008P 8P/Tuttle from Panker Obs. (Nov. 3.85-86p3 & 11.92-93p3), Urseanu Obs. (Nov. 27.95-96p2 & 28.04p1), Szeged Obs. (Nov. 28.79-80p5), Geisei Obs. (Nov. 30.41-42p2), Monte Deva Obs. (Dec. 5.10-11p5, 5.99-00p5, 6.92-93p5 & 8.93-94p5), Carmelita Obs. (Dec. 5.86-87p3), Chante-Perdrix Obs. (Dec. 5.88-92p3), Montcabre Obs. (Dec. 7.78p3), Isle of Man Obs. (Dec. 7.84p2), MCM1 (Dec. 7.96-97p3), CAST Obs. (Dec. 8.76p1), and Masquefa Obs. (Dec. 8.95p3)

MPEC 2007-X48 - "16:33 UT" - Comet C/2007 W3 (LINEAR)

CK07W030 C/2007 W3 (i=78.7°, q=1.785 AU, TP=2008 June 2.758 TT) from Junk Bond Obs. (Dec. 3.33-40p4), San Marcello Pistoiese Obs. (Dec. 3.82-83p4), Ageo Obs. (Dec. 4.71-72p3), Montcabre Obs. (Dec. 4.94-95p3 & 5.96-97p3), and Piszkesteto Sta. (Dec. 4.00-01p3 & 5.87-88p5)

MPEC 2007-X47 - "16:29 UT" - Comet C/2007 W1 (Boattini)

CK07W010 C/2007 W1 (i=9.9°, q=0.857 AU, TP=2008 June 25.440 TT) from Kiev Comet Station (Nov. 30.13-14p4), Piszkesteto Sta. (Dec. 5.07p3), and Montcabre Obs. (Dec. 7.23-24p3)

MPEC 2007-X46 - "16:25 UT" - Comet P/2007 V2 (Hill)

PK07V020 P/2007 V2 (q=2.775 AU, Q=5.361 AU, TP=2007 July 30.9320 TT) from Buchloe Obs. (Nov. 28.79p1), Piszkesteto Sta. (Dec. 5.89-90p3), and Nazaret Obs. (Dec. 8.01-05p3)

MPEC 2007-X45 - "16:22 UT" - Comet C/2007 U1 (LINEAR)

CK07U010 C/2007 U1 (LINEAR) (i=157.8°, q=3.329 AU, TP=2008 Aug. 7.2219 TT) from Kiev Comet Station (Nov. 30.11-12p3), Montana Blanca Obs. (Dec. 3.98-99p2), and Kambah Obs. (Dec. 4.65-66p2)

MPEC 2007-X44 - "16:18 UT" - Comet P/2007 T6 (Catalina)

PK07T060 P/2007 T6 (Catalina) (q=2.232 AU, Q=6.751 AU, TP=2007 Aug. 19.6466 TT) from the Catalina Sky Survey (CSS) (Dec. 3.38-42p4), Piszkesteto Sta. (Dec. 5.95p3), and Nazaret Obs. (Dec. 6.13-15p3)

MPEC 2007-X43 - "16:11 UT" - Comet C/2007 T5 (Gibbs)

CK07T050 C/2007 T5 (Gibbs) (i=45.6°, q=4.049 AU, Q=89.631 AU, TP=2008 May 24.2869 TT) from Kiev Comet Station (Nov. 30.06-09p3), Ageo Obs. (Dec. 1.79-80p2), Piszkesteto Sta. (Dec. 5.98p3), and Montcabre Obs. (Dec. 7.01p3)

MPEC 2007-X42 - "16:08 UT" - Comet P/2007 T2 (Kowalski)

PK07T020 P/2007 T2 (Kowalski) (q=0.696 AU, Q=5.485 AU, TP=2007 Sept. 19.0214 TT) from Nazaret Obs. (Dec. 2.17-18p3, 4.15p1, 4.19p1, 4.23p1 & 6.17-20p3), Montcabre Obs. (Dec. 5.03-05p2 & 9.04-08p3), and Ageo Obs. (Dec. 5.75-76p3)

MPEC 2007-X41 - "15:24 UT" - 2007 XH16

K07X16H 2007 XH16 (Earth MOID=5.6 LD, H=19.4 ~446m) was discovered at 1707 UT on 8 Dec. by the SSS, which observed it at Dec. 8.71-73p9 and 9.73-74p13. The discovery was confirmed by E. Guido via RAS Obs. Mayhill (Dec. 9.39-40p2). This object will be coming within ten lunar distances (LD) of Earth, reaching 8.7 LD on 26 Dec.

<< DOU on 10 Dec. '07 >> MPEC 2007-X40 - "07:10 UT" - Daily Orbit Update

K07V04Q 2007 VQ4 (arc=36 days, H=16.0 ~2.14 km, q=1.271 AU) from Hamamatsu-Yuto Obs. (Dec. 9.73-76p6)
K07S06P 2007 SP6 (arc=79 days, H=18.2 ~776m) from Hamamatsu-Yuto Obs. (Dec. 9.68-69p3)
K07P11U 2007 PU11 (Q=4.384 AU, arc=3 opp, H=16.3 ~1.86 km) from Hamamatsu-Yuto Obs. (Dec. 9.58-60p3)
K05T50F 2005 TF50 (q=0.293 AU, Q=4.238 AU, arc=26 days, H=20.3 ~295m) from Lulin Minor Bodies Tracking (LIMIT) (2005 Oct. 18.60-62p6)
K03B84H 2003 BH84 (arc=2 opp, H=16.8 ~1.48 km) from Hamamatsu-Yuto Obs. (Dec. 9.57-58p3)

Observers on 10 December '07

A total of 54 observing facilities appear in today's MPECs.

Code	Observer / observatory
`H07`	7300 Obs. in New Mexico, 1 in MPEC 2007-X49 -- 172P
`349`	Ageo Obs. in Japan, 13 in MPECs 2007-X42, 2007-X43, 2007-X48 & 2007-X49 -- C/2007 W3, C/2007 T5, P/2007 T2, P/2007 C2, C/2007 B2, C/2006 M1, C/2006 K3, C/2006 K1, 173P, 172P, 70P, 46P, 29P
`J97`	Alginet Obs. in Spain, 5 in MPEC 2007-X49 -- P/2007 H1, C/2006 W3, C/2006 OF2, 188P, 17P
`B37`	Ametlla del Valles Obs. in Spain, 3 in MPEC 2007-X49 -- 110P, 74P, 29P
`H55`	Astronomical Research Obs. in Illinois, 1 in MPEC 2007-X50 -- 2007 XJ16
`215`	Buchloe Obs. in Germany, 3 in MPECs 2007-X46 & 2007-X49 -- P/2007 V2, 190P, 150P
`235`	CAST Obs. in Italy, 9 in MPEC 2007-X49 -- P/2007 H1, C/2006 OF2, 110P, 93P, 50P, 46P, 29P, 17P, 8P
`B09`	Capannoli Obs. in Italy, 2 in MPEC 2007-X49 -- 110P, 29P
`B20`	Carmelita Obs. in Spain, 6 in MPEC 2007-X49 -- P/2007 H1, 93P, 50P, 29P, 17P, 8P
`703`	Catalina Sky Survey in Arizona, 1 in MPEC 2007-X44 -- P/2007 T6
`B24`	Cesson Obs. in France, 2 in MPEC 2007-X49 -- 50P, 17P
`A77`	Chante-Perdrix Obs. in France, 3 in MPEC 2007-X49 -- 150P, 17P, 8P
`J36`	El Olivo Obs., 6 in MPEC 2007-X49 -- P/2007 H1, C/2006 W3, C/2006 S5, 74P, 29P, 17P
`372`	Geisei Obs. in Japan, 3 in MPEC 2007-X49 -- 46P, 17P, 8P
`683`	Goodricke-Pigott Obs. in Arizona, 2 in MPEC 2007-X49 -- P/2004 F3, 188P
`J95`	Great Shefford Obs. in England, 1 in MPEC 2007-X49 -- 17P
`B34`	Green Island Obs. in Cyprus, 1 in MPEC 2007-X49 -- 17P
`458`	Guadarrama Obs. in Spain, 3 in MPEC 2007-X49 -- 93P, 29P, 17P
`442`	Gualba Obs. in Spain, 2 in MPEC 2007-X49 -- 29P, 17P
`379`	Hamamatsu-Yuto Obs. in Japan, 9 in MPECs 2007-X40 & 2007-X49 -- 2007 VQ4, 2007 SP6, 2007 PU11, 2003 BH84, 110P, 93P, 50P, 29P, 17P
`987`	Isle of Man Obs. on the Isle of Man, 3 in MPEC 2007-X49 -- 93P, 17P, 8P
`701`	Junk Bond Obs. in Arizona, 1 in MPEC 2007-X48 -- C/2007 W3
`415`	Kambah Obs. in Australia, 6 in MPECs 2007-X45 & 2007-X49 -- C/2007 U1, C/2007 Q3, P/2007 H1, C/2006 Q1, C/2006 K1, 192P
`585`	Kiev Comet Station in the Ukraine, 5 in MPECs 2007-X43, 2007-X45, 2007-X47 & 2007-X49 -- C/2007 W1, C/2007 U1, C/2007 T5, C/2007 S2, 50P
`704`	LINEAR in New Mexico, 6 in MPEC 2007-X49 -- P/2007 V1, C/2007 E1, C/2006 S5, 173P, 128P, 74P
`699`	LONEOS in Arizona, 6 in MPEC 2007-X49 -- C/2007 S2, P/2007 C2, C/2006 S5, C/2006 M1, 128P, 70P
`J76`	La Murta Obs. in Spain, 1 in MPEC 2007-X49 -- C/2006 S5
`D35`	Lulin Minor Bodies Tracking in Taiwan, 1 in MPEC 2007-X40 -- 2005 TF50
`130`	Lumezzane Obs. in Italy, 4 in MPEC 2007-X49 -- P/2007 W2, C/2007 S2, C/2006 K3, 108P
`A01`	Masia Cal Maciarol Modul 1 (MCM1), 2 in MPEC 2007-X49 -- 17P, 8P
`232`	Masquefa Obs. in Spain, 11 in MPEC 2007-X49 -- C/2007 B2, C/2006 W3, C/2006 S5, 188P, 173P, 93P, 74P, 50P, 29P, 17P, 8P
`A06`	Mataro Obs. in Spain, 2 in MPEC 2007-X49 -- C/2006 W3, 17P
`J46`	Montana Blanca Obs. in the Canary Islands, 3 in MPECs 2007-X45 & 2007-X49 -- P/2007 W2, P/2007 V1, C/2007 U1
`213`	Montcabre Obs. in Spain, 12 in MPECs 2007-X42, 2007-X43, 2007-X47, 2007-X48 & 2007-X49 -- C/2007 W3, P/2007 W2, C/2007 W1, P/2007 V1, C/2007 T5, P/2007 T2, 110P, 93P, 50P, 29P, 17P, 8P
`945`	Monte Deva Obs. in Spain, 9 in MPEC 2007-X49 -- P/2007 H1, C/2006 S5, C/2006 OF2, 110P, 93P, 46P, 29P, 17P, 8P
`900`	Moriyama Obs. in Japan, 2 in MPEC 2007-X49 -- 93P, 17P
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 4 in MPEC 2007-X49 -- 173P, 150P, 108P, 74P
`J47`	Nazaret Obs. in Spain, 8 in MPECs 2007-X42, 2007-X44, 2007-X46 & 2007-X49 -- P/2007 W2, P/2007 V2, P/2007 V1, P/2007 T6, P/2007 T2, P/2007 R1, 50P, 17P
`423`	North Ryde Obs. in New South Wales, 1 in MPEC 2007-X49 -- C/2007 Q3
`A32`	Panker Obs. in Germany, 7 in MPEC 2007-X49 -- C/2007 E1, C/2006 M1, 110P, 93P, 50P, 29P, 8P
`H45`	Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2007-X49 -- 17P
`561`	Piszkesteto Sta. in Hungary, 8 in MPECs 2007-X43, 2007-X44, 2007-X46, 2007-X47, 2007-X48 & 2007-X49 -- C/2007 W3, P/2007 W2, C/2007 W1, P/2007 V2, P/2007 T6, C/2007 T5, C/2007 S2, 17P
`H06`	RAS Obs. Mayhill in New Mexico, 1 in MPEC 2007-X49 -- 17P
`H06%`	E. Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2007-X41 -- 2007 XH16
`939`	Rodeno Obs. in Spain, 6 in MPEC 2007-X49 -- P/2007 H1, C/2006 W3, C/2006 S5, 93P, 29P, 17P
`104`	San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2007-X48 -- C/2007 W3
`233`	San Vito Obs. in Italy, 1 in MPEC 2007-X49 -- C/2006 OF2
`204`	Schiaparelli Obs. in Italy, 1 in MPEC 2007-X49 -- P/2007 R1
`E12`	Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2007-X41 & 2007-X49 -- 2007 XH16, 192P
`691`	Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2007-X49 & 2007-X50 -- 2007 XJ16, 190P, 173P, 128P
`291`	Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2007-X50 -- 2007 XJ16
`629`	Szeged Obs. in Hungary, 2 in MPEC 2007-X49 -- 110P, 8P
`B26`	Terres Blanches Obs. in France, 2 in MPEC 2007-X49 -- 50P, 17P
`A92`	Urseanu Obs. in Romania, 1 in MPEC 2007-X49 -- 8P
`J70`	Vega del Thader Obs. in Spain, 8 in MPEC 2007-X49 -- C/2007 S2, C/2006 S5, 110P, 93P, 74P, 50P, 29P, 17P

Impact Risk Monitoring on 10 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 XJ16	JPL Sentry	2324	2011-2106	93	6.9e-08	-4.17	-4.69	0	JPL: "Analysis based on 11 observations spanning .97312 days (2007-Dec-05.38279 to 2007-Dec-06.355912)." Diameter approximately 0.460 km. from mean, weighted H=19.3.

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 10 December '07

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

2324	Noted that JPL Sentry has posted 2007 XJ16 as an impact risk - see above
1843	Grabbed MPEC 2007-X50 - 2007 XJ16 - see above
1716	Grabbed MPEC 2007-X41 - 2007 XH16 - see above Grabbed MPEC 2007-X42 - Comet P/2007 T2 (Kowalski) - see above Grabbed MPEC 2007-X43 - Comet C/2007 T5 (Gibbs) - see above Grabbed MPEC 2007-X44 - Comet P/2007 T6 (Catalina) - see above Grabbed MPEC 2007-X45 - Comet C/2007 U1 (LINEAR) - see above Grabbed MPEC 2007-X46 - Comet P/2007 V2 (Hill) - see above Grabbed MPEC 2007-X47 - Comet C/2007 W1 (Boattini) - see above Grabbed MPEC 2007-X48 - Comet C/2007 W3 (LINEAR) - see above Grabbed MPEC 2007-X49 - Observations of Comets - see above
1448	Grabbed MPEC 2007-X40 - Daily Orbit Update - see above

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