2007-12-16 Tracking News

Contents on 16 December '07

IAU Minor Planet Center
- NEOCP Activity -- 18 listings: 9 new, 9 updated
- New MPECs -- four MPECs
- Observers -- sixteen observing facilities
Impact Risk Monitoring -- seven 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 16 December '07

The MPC's NEO Confirmation Page has 18 listings: 9 new, 9 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had nine new and nine updated listings. Of these, fourteen were "one nighters." So far The Tracking News has counted a total of 23 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 16 December '07

Minor Planet Electronic Circulars

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

MPEC 2007-Y01 time-stamped "03:11 UT" - 2007 XT23 - see below
MPEC 2007-Y02 time-stamped "07:12 UT" - Daily Orbit Update - see below
MPEC 2007-Y03 time-stamped "17:03 UT" - 2007 XV23 - see below
MPEC 2007-Y04 time-stamped "17:09 UT" - 2007 XW23

MPEC 2007-Y04 - "17:09 UT" - 2007 XW23

K07X23W 2007 XW23 (small asteroid, Earth MOID=9.2 LD, H=25.8 ~23m) was discovered at 0632 UT on 15 Dec. by the Mt. Lemmon Survey (MLS), which observed it at Dec. 15.27-30p4, 15.38-42p6, and 16.28-29p4 at V=22.2.

MPEC 2007-Y03 - "17:03 UT" - 2007 XV23

K07X23V 2007 XV23 (small asteroid, Q=4.658 AU, Earth MOID=8.2 LD, H=25.0 ~34m) was discovered at 0615 UT on 14 Dec. by LINEAR, which observed it at Dec. 14.26-31p5 and 15.27-37p9. The discovery was confirmed by MLS (Dec. 16.41-42p4).

<< DOU on 16 Dec. '07 >> MPEC 2007-Y02 - "07:12 UT" - Daily Orbit Update

Observations of risk-listed objects
K07X16J 2007 XJ16 (arc=9 days, H=18.9 ~562m) from Astronomical Research Obs. (ARO) (Dec. 14.36-37p7)
K07X11K 2007 XK11 (Q=4.626 AU, arc=10 days, H=19.2 ~490m) from the Spacewatch 1.8m telescope (Dec. 16.08-09p3)
K07X10B 2007 XB10 (i=43.4°, arc=11 days, H=17.3 ~1.17 km) from Spacewatch 1.8m (Dec. 16.24-25p3)
K07X03P 2007 XP3 (q=0.212 AU, Q=5.215 AU, arc=11 days, H=18.9 ~562m) from Spacewatch 1.8m (Dec. 15.27-28p3)
K07W03P 2007 WP3 (small asteroid, arc=27 days, H=23.5 ~68m) from Spacewatch 1.8m (Dec. 15.18-20p3)
K07VI4K 2007 VK184 (almost small, arc=34 days, H=22.0 ~135m) from Spacewatch 1.8m (Dec. 15.16-17p3 & 16.15-17p3)
Observations of recently (no longer) risk-listed objects
K07X10D 2007 XD10 (arc=9 days, H=20.8 ~234m) from ARO (Dec. 14.36-37p3)
K07VD7W 2007 VW137 (arc=37 days, H=18.1 ~812m) from Spacewatch 1.8m (Dec. 15.22-23p3)
Observations of small asteroids (H>22.0)
K07W04T 2007 WT4 (arc=27 days, H=22.5 ~107m) from Spacewatch 1.8m (Dec. 16.21-22p3)
K07W03M 2007 WM3 (arc=29 days, H=23.1 ~81m) from Spacewatch 1.8m (Dec. 16.11-14p3)
K07U00R 2007 UR (Q=4.533 AU, arc=59 days, H=23.9 ~56m) from ARO (Dec. 14.37-39p3)
K06R01J 2006 RJ1 (arc=2 opp, H=22.2 ~123m) from Spacewatch 1.8m (Dec. 16.06-07p3)
Observations of other objects
K07X10C 2007 XC10 (i=48.0°, arc=11 days, H=19.4 ~446m) from Guidestar Obs. (Dec. 15.90-92p3)
K07X09Y 2007 XY9 (arc=11 days, H=21.0 ~214m) from the Catalina Sky Survey (CSS) (Dec. 15.15-17p4)
K07W55F 2007 WF55 (arc=15 days, H=19.0 ~537m) from La Fecha Obs. (Dec. 15.88p1 & 15.99-07p5)
K07VI6H 2007 VH186 (arc=35 days, H=20.1 ~323m) from Spacewatch 1.8m (Dec. 16.10-11p3)
K07V04Q 2007 VQ4 (arc=42 days, H=15.9 ~2.24 km, q=1.271 AU) from Hamamatsu-Yuto Obs. (Dec. 15.69-71p4)
K07T23C 2007 TC23 (Q=4.526 AU, arc=65 days, H=20.7 ~245m) from ARO (Dec. 14.41-42p3)
K07S06P 2007 SP6 (arc=85 days, H=18.2 ~776m) from Hamamatsu-Yuto Obs. (Dec. 14.67p2 & 15.64-68p3)
K07R12U 2007 RU12 (arc=94 days, H=20.0 ~339m) from LINEAR (Dec. 15.21-25p4)
K07P11U 2007 PU11 (Q=4.384 AU, arc=3 opp, H=16.3 ~1.86 km) from Hamamatsu-Yuto Obs. (Dec. 14.61-62p5 & 15.60-61p3)
K05Y96Q 2005 YQ96 (IEO, Q=0.992 AU, arc=2 opp, H=20.5 ~269m) from Spacewatch 1.8m (Dec. 15.54-55p3)
K05X80L 2005 XL80 (arc=2 opp, H=18.1 ~812m) from MLS (Dec. 15.16-19p4)
K05X01D 2005 XD1 (arc=2 opp, H=19.2 ~490m) from La Fecha Obs. (Dec. 16.09p1 & 16.13p1)
K05W56J 2005 WJ56 (arc=3 opp, H=17.9 ~891m) from Atlante Obs. (Dec. 16.07-10p3)
K05F03E 2005 FE3 (arc=2 opp, H=19.4 ~446m) from Spacewatch 1.8m (Dec. 15.37-39p3 at V=22.7)
K04B85D 2004 BD85 (arc=4 opp, H=18.7 ~616m) from LINEAR (Dec. 15.26-31p5)
K04A01R 2004 AR1 (arc=3 opp, H=19.8 ~371m) from ARO (Dec. 14.49p3)
K03B84H 2003 BH84 (arc=2 opp, H=16.9 ~1.41 km) from Hamamatsu-Yuto Obs. (Dec. 15.58p2)
H0903 170903 2004 WS2 from Mataro Obs. (Dec. 14.81-83p3)
G9675 169675 2002 JM97 from MLS (Dec. 15.38-41p4)
G2004 162004 1991 VE from MLS (Dec. 15.14-16p4)
F3591 153591 2001 SN263 from Willow Bank Obs. (Dec. 15.89-91p3)
F3201 153201 2000 WO107 from Atlante Obs. (Dec. 14.95-96p3) and LINEAR (Dec. 15.26-31p5)
E4411 144411 2004 EW9 from LINEAR (Dec. 15.26-31p5)
E1079 141079 2001 XS30 from MLS (Dec. 15.27-29p4 & 15.34-35p4)
68063 68063 2000 YJ66 from LINEAR (Dec. 15.33-38p5)
34613 34613 2000 UR13 from LINEAR (Dec. 15.33-38p5)
25916 25916 2001 CP44 from the Spacewatch 0.9m telescope (Dec. 15.41-45p3)
22099 22099 2000 EX106 from ARO (Dec. 14.50p3)
19764 19764 2000 NF5 from MLS (Dec. 15.27-29p4)
18736 18736 1998 NU from LINEAR (Dec. 15.20-25p5)
13651 13651 1997 BR from Spacewatch 0.9m (Dec. 15.53-55p3)
05836 5836 1993 MF from ARO (Dec. 14.49-50p3)
05131 5131 1990 BG from LINEAR (Dec. 15.32-37p5)
04954 4954 Eric (1990 SQ) from San Vito Obs. (Dec. 15.71-72p3) and La Fecha Obs. (Dec. 15.93-97p3)
04450 4450 Pan (1987 SY) from Chante-Perdrix Obs. (Dec. 14.16-18p3)
01620 1620 Geographos (1951 RA) from Atlante Obs. (Dec. 15.12-14p3)

MPEC 2007-Y01 - "03:11 UT" - 2007 XT23

K07X23T 2007 XT23 (small asteroid, Q=4.567 AU, H=22.4 ~112m) was discovered at 0627 UT on 15 Dec. by the MLS, which observed it at Dec. 15.27-29p4 and 15.34-35p4. The discovery was confirmed by Jim Young via Table Mtn. Obs. (Dec. 15.36-37p4), Guidestar Obs. (Dec. 15.72-74p3), and Great Shefford Obs. (Dec. 16.03-04p3).

Observers on 16 December '07

Sixteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 7 in MPEC 2007-Y02 -- 2007 XJ16, 2007 XD10, 2007 UR, 2007 TC23, 2004 AR1, 22099, 5836
`J51`	Atlante Obs. in the Canary Islands, 3 in MPEC 2007-Y02 -- 2005 WJ56, 153201, 1620
`703`	Catalina Sky Survey in Arizona, 1 in MPEC 2007-Y02 -- 2007 XY9
`A77`	Chante-Perdrix Obs. in France, 1 in MPEC 2007-Y02 -- 4450
`J95`	Great Shefford Obs. in England, 1 in MPEC 2007-Y01 -- 2007 XT23
`A17`	Guidestar Obs. in Germany, 2 in MPECs 2007-Y01 & 2007-Y02 -- 2007 XT23, 2007 XC10
`379`	Hamamatsu-Yuto Obs. in Japan, 4 in MPEC 2007-Y02 -- 2007 VQ4, 2007 SP6, 2007 PU11, 2003 BH84
`704`	LINEAR in New Mexico, 9 in MPECs 2007-Y02 & 2007-Y03 -- 2007 XV23, 2007 RU12, 2004 BD85, 68063, 34613, 18736, 153201, 144411, 5131
`J34`	La Fecha Obs., 3 in MPEC 2007-Y02 -- 2007 WF55, 2005 XD1, 4954
`A06`	Mataro Obs. in Spain, 1 in MPEC 2007-Y02 -- 170903
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2007-Y01, 2007-Y02, 2007-Y03 & 2007-Y04 -- 2007 XW23, 2007 XV23, 2007 XT23, 2005 XL80, 19764, 169675, 162004, 141079
`233`	San Vito Obs. in Italy, 1 in MPEC 2007-Y02 -- 4954
`691`	Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2007-Y02 -- 25916, 13651
`291`	Spacewatch 1.8m telescope in Arizona, 12 in MPEC 2007-Y02 -- 2007 XP3, 2007 XK11, 2007 XB10, 2007 WT4, 2007 WP3, 2007 WM3, 2007 VW137, 2007 VK184, 2007 VH186, 2006 RJ1, 2005 YQ96, 2005 FE3
`6735`	Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2007-Y01 -- 2007 XT23
`J71`	Willow Bank Obs. in England, 1 in MPEC 2007-Y02 -- 153591

Impact Risk Monitoring on 16 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 XB23	NEODyS	1501	2069-2086	3	4.21e-08	-8.77	-9.08	0	NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2007/12/14.563 to 2007/12/15.480."

2007 XJ16	JPL Sentry	1401	2010-2107	89	3.5e-07	-2.58	-2.64	0	JPL: "Analysis based on 18 observations spanning 8.9881 days (2007-Dec-05.38279 to 2007-Dec-14.370881)." Diameter approximately 0.633 km. from mean, weighted H=18.6.
2007 XJ16	NEODyS	1401	2010-2089	51	3.42e-07	-2.59	-2.67	0	NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2007/12/05.384 to 2007/12/14.372."

2007 XK11	JPL Sentry	1401	2064-2101	2	8.8e-08	-4.43	-4.51	0	JPL: "Analysis based on 39 observations spanning 9.9980 days (2007-Dec-06.0886 to 2007-Dec-16.08663)." Diameter approximately 0.495 km. from mean, weighted H=19.2.
2007 XK11	NEODyS	1401	2045-2064	2	6.93e-08	-4.51	-4.71	0	NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2007/12/06.089 to 2007/12/16.087."

2007 XB10	JPL Sentry	1501	2054-2107	13	6.2e-09	-4.67	-5.19	0	JPL: "Analysis based on 19 observations spanning 11.085 days (2007-Dec-05.16649 to 2007-Dec-16.25179)." Diameter approximately 0.931 km. from mean, weighted H=17.8.
2007 XB10	NEODyS	1401	2045-2089	25	8.81e-09	-4.49	-5.10	0	NEODyS: "Based on 20 optical observations (of which 1 are rejected as outliers) from 2007/12/05.167 to 2007/12/16.253."

2007 XP3	NEODyS	1402	2057-2059	3	7.41e-07	-2.48	-2.74	0	NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2007/12/04.383 to 2007/12/15.282."
2007 XP3	JPL Sentry	1401	2057-2059	2	4.1e-07	-2.76	-2.84	0	JPL: "Analysis based on 19 observations spanning 10.899 days (2007-Dec-04.38257 to 2007-Dec-15.28134)." Diameter approximately 0.636 km. from mean, weighted H=18.6.

2007 WP3	JPL Sentry	1401	2098-2105	8	5.4e-06	-4.81	-5.16	0	JPL: "Analysis based on 60 observations spanning 26.940 days (2007-Nov-18.26457 to 2007-Dec-15.20424)." Diameter approximately 0.066 km. from mean, weighted H=23.5.

2007 VK184	NEODyS	1501	2048-2057	4	2.34e-04	-1.99	-2.00	1	NEODyS: "Based on 93 optical observations (of which 0 are rejected as outliers) from 2007/11/12.140 to 2007/12/16.175. NOTE: The Virtual Impactor in 2048/06/03.087 in the table above is rated as Torino Scale 1."

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 16 December '07

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

1748	Grabbed MPEC 2007-Y03 - 2007 XV23 - see above Grabbed MPEC 2007-Y04 - 2007 XW23 - see above
1501	Noted that NEODyS has updated its 2007 VK184 risk assessment - see above Noted that JPL Sentry has updated its 2007 XB10 risk assessment - see above Noted that NEODyS has posted 2007 XB23 as an impact risk - see above
1402	Noted that NEODyS has updated its 2007 XP3 risk assessment - see above Grabbed MPEC 2007-Y02 - Daily Orbit Update - see above
1401	Noted that JPL Sentry has updated its 2007 WP3 risk assessment - see above Noted that NEODyS has updated its 2007 XB10 risk assessment - see above Noted that JPL Sentry has updated its 2007 XJ16 risk assessment - see above Noted that NEODyS has updated its 2007 XJ16 risk assessment - see above Noted that JPL Sentry has updated its 2007 XK11 risk assessment - see above Noted that NEODyS has updated its 2007 XK11 risk assessment - see above Noted that JPL Sentry has updated its 2007 XP3 risk assessment - see above
0444	Grabbed MPEC 2007-Y01 - 2007 XT23 - see above

http://www.HohmannTransfer.com/mn/07/07350_1216.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 news updates are flagged by A/CC's RSS news feed (link).