Contents  on 17 December '07

Resources:

The latest news: framed access (best), RSS news feed 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-Y18 - "19:18 UT" - 2007 YM


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


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


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


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


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


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


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


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


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


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


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


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


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

Observers  on 17 December '07

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

CodeObserver / observatory
834AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2007-Y12 -- 93P
349Ageo 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
J51Atlante 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
413Australian Natl. Univ. 1m telescope in New South Wales, 1 in MPEC 2007-Y12 -- C/1995 O1
A81Balzaretto Obs. in Italy, 1 in MPEC 2007-Y12 -- C/2006 S5
J92Beaconsfield Obs. in England, 1 in MPEC 2007-Y05 -- 2007 WE55
235CAST Obs. in Italy, 6 in MPEC 2007-Y12 -- C/2006 S5, 110P, 93P, 29P, 17P, 8P
B09Capannoli Obs. in Italy, 2 in MPEC 2007-Y12 -- 110P, 29P
B20Carmelita Obs. in Spain, 5 in MPEC 2007-Y12 -- 117P, 93P, 50P, 17P, 8P
703Catalina 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
A77Chante-Perdrix Obs. in France, 4 in MPEC 2007-Y12 -- 46P, 29P, 17P, 8P
448Desert Moon Obs. in New Mexico, 5 in MPEC 2007-Y05 -- 2007 XF18, 2007 XC10, 2007 VH3, 2007 VG184, 2004 XJ35
J36El Olivo Obs., 1 in MPEC 2007-Y12 -- 191P
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2007-Y05 & 2007-Y15 -- 2007 YH, 2005 WJ56
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2007-Y12 -- P/2004 F3
J95Great Shefford Obs. in England, 1 in MPEC 2007-Y05 -- 2007 XW23
442Gualba Obs. in Spain, 2 in MPEC 2007-Y12 -- 29P, 17P
379Hamamatsu-Yuto Obs. in Japan, 7 in MPECs 2007-Y05 & 2007-Y12 -- 2007 VQ4, 2007 PU11, 2003 BH84, 68359, 46P, 17P, 8P
A18Herne Obs. in Germany, 2 in MPEC 2007-Y12 -- 17P, 8P
D88Hiratsuka Obs., 3 in MPEC 2007-Y12 -- P/2007 V1, 50P, 8P
J44Iturrieta Obs. in Spain, 3 in MPEC 2007-Y12 -- 93P, 50P, 17P
415Kambah Obs. in Australia, 2 in MPEC 2007-Y12 -- C/2007 Q3, C/2005 EL173
704LINEAR 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
699LONEOS 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
J34La Fecha Obs., 3 in MPECs 2007-Y05 & 2007-Y12 -- 2007 WF55, C/2006 W3, 2005 XD1
J59Linceo Obs. in Spain, 3 in MPEC 2007-Y12 -- P/2007 H1, 191P, 46P
232Masquefa Obs. in Spain, 1 in MPEC 2007-Y12 -- 65P
A06Mataro Obs. in Spain, 3 in MPEC 2007-Y12 -- C/2006 S5, 110P, 74P
152Moletai Obs. in Lithuania, 1 in MPEC 2007-Y12 -- 17P
J46Montana Blanca Obs. in the Canary Islands, 2 in MPECs 2007-Y11 & 2007-Y12 -- C/2007 W3, 17P
213Montcabre Obs. in Spain, 7 in MPECs 2007-Y11 & 2007-Y12 -- C/2007 W3, C/2006 W3, 191P, 93P, 29P, 17P, 8P
945Monte 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
900Moriyama Obs. in Japan, 7 in MPEC 2007-Y12 -- C/2006 W3, C/2006 S5, 128P, 110P, 93P, 29P, 17P
G96Mt. 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
J93Mt. Tuffley Obs. in England, 3 in MPEC 2007-Y12 -- 110P, 93P, 50P
J47Nazaret 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
J69North Obs. in England, 1 in MPEC 2007-Y15 -- 2007 YH
423North 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
B49Paus Obs. in Spain, 1 in MPEC 2007-Y06 -- P/2007 T2
H45Petit 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
J52Pinsoro Obs. in Spain, 1 in MPEC 2007-Y12 -- 139P
561Piszkesteto Sta. in Hungary, 1 in MPEC 2007-Y12 -- P/2006 W4
J53Posadas Obs. in Spain, 2 in MPEC 2007-Y12 -- 74P, 29P
H06RAS 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
H062Robert Hutsebaut in Belgium via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2007-Y15 -- 2007 YH
H68Red Barn Obs. in Georgia, 1 in MPEC 2007-Y12 -- 93P
473Remanzacco Obs. in Italy, 1 in MPEC 2007-Y12 -- 8P
619Sabadell Obs. in Spain, 6 in MPEC 2007-Y12 -- P/2007 H1, C/2006 OF2, 93P, 46P, 17P, 8P
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2007-Y12 -- C/2006 W3
233San Vito Obs. in Italy, 1 in MPEC 2007-Y12 -- 8P
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2007-Y05, 2007-Y12 & 2007-Y14 -- 2007 YG, 143404, 143P
291Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2007-Y05 & 2007-Y14 -- 2007 YG, 2007 XZ9, 2004 BG121
J88Strawberry Field Obs. in England, 1 in MPEC 2007-Y12 -- 93P
673Table Mtn. Obs. in southern California, 1 in MPEC 2007-Y12 -- 79P
B26Terres Blanches Obs. in France, 2 in MPEC 2007-Y12 -- 50P, 17P
J70Vega 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
H47Vicksburg Obs. in Mississippi, 5 in MPEC 2007-Y12 -- 191P, 110P, 74P, 46P, 29P
C42Xingming 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 YGJPL Sentry22342014-2103505.4e-08-6.37-6.660JPL: "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 YFJPL Sentry21592026-207774.6e-08-7.03-7.390JPL: "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 XF18JPL Sentry17032015-208921.2e-09-5.64-5.660JPL: "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 XZ9NEODyS20032056-208951.59e-06-5.74-6.000NEODyS: "Based on 38 optical observations (of which 0 are rejected as outliers) from 2007/12/04.195 to 2007/12/16.430."
JPL Sentry17032056-208941.6e-06-5.74-5.980JPL: "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 VK184JPL Sentry20022048-205752.4e-04-1.99-1.991JPL: "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.

2233Noted that JPL Sentry has posted 2007 YG as an impact risk - see above
2159Noted that JPL Sentry has posted 2007 YF as an impact risk - see above
2003Noted that NEODyS has updated its 2007 XZ9 risk assessment - see above
2002Noted that JPL Sentry has updated its 2007 VK184 risk assessment - see above
1934Grabbed MPEC 2007-Y18 - 2007 YM - see above
1824Grabbed 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
1804Grabbed MPEC 2007-Y13 - 2007 YF - see above
1723Grabbed MPEC 2007-Y12 - Observations of Comets - see above
1703Noted 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
1642Grabbed 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
1412Grabbed MPEC 2007-Y05 - Daily Orbit Update - see above