16 Sep '07 Tracking News

Contents on 16 September '07

Minor-Object News
IAU Minor Planet Center
- NEOCP Activity -- 32 listings: 20 new, 12 updated
- New MPECs -- one MPEC
- Observers -- seventeen observing facilities
Impact Risk Monitoring -- six objects reported
Chronology

Resources:

Consolidated Risk Tables - CRT page
Ephemerides for risk-rated objects

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.

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.

Minor-Object News on 16 September '07

Daily news format change: As of today we are closing off the news and science sections and, for various reasons, from here forward we will be handling only observations and risk monitoring on these daily news pages.
Our approach to aggregating minor-object news and science has been unique, but that information is available elsewhere, scattered across the Web. The only two truly unique activities we provide on this Web site are the Consolidated Risk Tables (CRT) and daily public recognition by name for the work of MPC-coded observers, some of which is relevant to the CRT.
Although observing and risk monitoring are of real importance, this work isn't usually "Major News," so we are changing this page's title to "The Tracking News" to reflect its actual activity. {permalink}

NEOCP Activity on 16 September '07

The MPC's NEO Confirmation Page has 32 listings: 20 new, 12 updated

When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had 20 new and twelve updated listings. Of these, 21 were "one nighters." So far Tracking News has counted a total of 33 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 September '07

Minor Planet Electronic Circulars

As of last check at 2355 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 16 Sept. '07 >> MPEC 2007-S01 - "06:07 UT" - Daily Orbit Update

Observations of risk-listed objects
K07R20A 2007 RA20 (arc=1 day, H=19.9 ~355m) from the Siding Spring Survey (SSS) (Sept. 15.62p5)
K07R19Y 2007 RY19 (small asteroid, arc=1 day, H=22.1 ~129m) from Astronomical Research Obs. (ARO) (Sept. 15.29-30p3)
K07R19X 2007 RX19 (i=43.4°, arc=1 day, H=18.2 ~776m) from ARO (Sept. 15.15-16p3) and Lulin Minor Bodies Tracking (LIMIT) (Sept. 15.50-51p3)
K07R09V 2007 RV9 (arc=5 days, H=20.2 ~309m) from ARO (Sept. 13.15p3, 14.16-18p3 & 15.13-15p3) and the Spacewatch 1.8m telescope (Sept. 15.39-40p5)
K07R09U 2007 RU9 (arc=6 days, H=20.8 ~234m) from ARO (Sept. 12.19-20p3, 13.19-20p3 & 15.11p3), Spacewatch 1.8m (Sept. 15.41-42p3), and Eschenberg Obs. (Sept. 15.93p3)
K07R09T 2007 RT9 (arc=5 days, H=18.9 ~562m) from ARO (Sept. 13.18-20p3 at V=22.1-2 & 14.20-24p2 at V=22.1) and Spacewatch 1.8m (Sept. 15.37-39p3)
Observations of recently (no longer) risk-listed objects
K07R09R 2007 RR9 (Q=4.646 AU, arc=6 days, H=20.3 ~295m) from Eschenberg Obs. (Sept. 15.91p3)
K07R02F 2007 RF2 (arc=10 days, H=20.6 ~257m) from ARO (Sept. 12.24-25p3) and Desert Moon Obs. (Sept. 15.35-36p4)
K07R01J 2007 RJ1 (small asteroid, arc=13 days, H=25.2 ~31m) from Desert Moon Obs. (Sept. 15.31p3) and Great Shefford Obs. (Sept. 15.92p3 & 16.09p3)
Observations of small asteroids (H>22.0)
K07R19Z 2007 RZ19 (arc=1 day, H=22.3 ~117m) from ARO (Sept. 15.26-29p3)
K07R19W 2007 RW19 (arc=1 day, H=25.5 ~27m) from ARO (Sept. 15.20-22p3), LINEAR (Sept. 15.23-28p9), and LIMIT (Sept. 15.50p3)
K07R17T 2007 RT17 (arc=1 day, H=25.6 ~26m) from Gaisberg Obs. (Sept. 13.94-95p3)
K07R17P 2007 RP17 (arc=2 days, H=24.2 ~49m) from ARO (Sept. 15.12-13p2)
K07R15P 2007 RP15 (arc=2 days, H=22.9 ~89m) from Greiner Research Obs. (Sept. 15.17-19p5)
K07R12V 2007 RV12 (arc=3 days, H=25.6 ~26m) from ARO (Sept. 14.31-32p5 & 15.39-40p3)
K07R12S 2007 RS12 (arc=3 days, H=23.1 ~81m) from ARO (Sept. 15.30-31p3)
K07R09Y 2007 RY9 (arc=3 days, H=23.5 ~68m) from ARO (Sept. 12.13-17p5)
K07R09P 2007 RP9 (arc=2 days, H=23.2 ~78m) from ARO (Sept. 12.12p3)
K07R08Z 2007 RZ8 (arc=6 days, H=23.9 ~56m) from ARO (Sept. 12.23-24p3 & 15.23-24p3)
K07R08X 2007 RX8 (arc=4 days, H=24.5 ~43m) from ARO (Sept. 12.25-26p3)
K07R02G 2007 RG2 (arc=10 days, H=23.8 ~59m) from ARO (Sept. 12.32-33p3 & 15.38p3)
K07R02E 2007 RE2 (arc=10 days, H=22.8 ~93m) from the Catalina Sky Survey (CSS) (Sept. 15.40-41p4)
Observations of other objects
K07R19V 2007 RV19 (Q=5.397 AU, arc=1 day, H=18.8 ~589m) from ARO (Sept. 15.07p3), LINEAR (Sept. 15.17-22p5), and LIMIT (Sept. 15.50p3)
K07R12R 2007 RR12 (arc=3 days, H=19.8 ~371m) from Desert Moon Obs. (Sept. 15.33-34p3)
K07R10U 2007 RU10 (arc=4 days, H=18.9 ~562m) from Chante-Perdrix Obs. (Sept. 14.93-94p3) and ARO (Sept. 15.07-08p3)
K07R05F 2007 RF5 (arc=10 days, H=18.5 ~676m) from ARO (Sept. 12.36-37p3) and LINEAR (Sept. 15.36-40p4)
K07R01T 2007 RT1 (arc=10 days, H=20.6 ~257m) from ARO (Sept. 12.18p3)
K07Q02A 2007 QA2 (arc=29 days, H=20.7 ~245m) from Desert Moon Obs. (Sept. 15.10-12p2)
K07P08E 2007 PE8 (arc=124 days, H=19.4 ~446m) from LINEAR (Sept. 15.23-27p4) and Cormons Obs. (Sept. 15.82-83p3)
K07L19Q 2007 LQ19 (Q=4.246 AU, arc=94 days, H=17.6 ~1.02 km) from ARO (Sept. 15.40-41p2)
K05Y55W 2005 YW55 (arc=4 opp, H=19.4 ~446m) from ARO (Sept. 13.33-36p3 at V=22.1-2)
K05T45P 2005 TP45 (arc=2 opp, H=21.0 ~214m) from the Mt. Lemmon Survey (MLS) (Sept. 15.44-46p3)
K05G59E 2005 GE59 (arc=2 opp, H=18.0 ~851m) from LINEAR (Sept. 15.43-47p4)
K04V14W 2004 VW14 (arc=3 opp, H=19.4 ~446m) from ARO (Sept. 15.32-35p3 at V=22.5-8)
K04M06D 2004 MD6 (arc=3 opp, H=20.5 ~269m) from ARO (Sept. 14.07-08p2 at V=22.3-4)
K04D44M 2004 DM44 (Q=4.238 AU, arc=2 opp, H=20.7 ~245m) from Spacewatch 1.8m (Sept. 15.35-36p3)
K03T04L 2003 TL4 (arc=2 opp, H=19.4 ~446m) from ARO (Sept. 14.11p3)
K02T66E 2002 TE66 (i=51.3°, arc=4 opp, H=18.3 ~741m) from ARO (Sept. 15.09-11p3)
K02S00V 2002 SV (arc=2 opp, H=19.8 ~371m) from LINEAR (Sept. 15.18-23p5)
K01Y04J 2001 YJ4 (arc=5 opp, H=16.4 ~1.78 km) from ARO (Sept. 15.33-36p3 at V=22.2-3)
J99S05O 1999 SO5 (arc=2 opp, H=21.0 ~214m) from MLS (Sept. 15.44-46p3)
J99J03U 1999 JU3 (arc=4 opp, H=19.3 ~467m) from Eschenberg Obs. (Sept. 15.79p3)
J98S15D 1998 SD15 (arc=4 opp, H=19.2 ~490m) from Eschenberg Obs. (Sept. 15.78p7)
J98S04V 1998 SV4 (i=53.3°, q=0.292 AU, arc=5 opp, H=18.1 ~812m) from CSS (Sept. 15.42-45p4)
J88P00A 1988 PA (arc=3 opp, H=17.3 ~1.17 km) from LINEAR (Sept. 15.31-35p4)
F9399 159399 1998 UL1 from CSS (Sept. 15.13-15p4)
E3678 143678 2003 SA224 from LINEAR (Sept. 14.36-40p5)
E3651 143651 2003 QO104 from MLS (Sept. 15.44-46p4)
D8883 138883 2000 YL29 from LINEAR (Sept. 15.11-16p5)
D6617 136617 1994 CC from LINEAR (Sept. 14.41-46p3)
87309 87309 2000 QP from CSS (Sept. 15.19-20p3)
86324 86324 1999 WA2 from CSS (Sept. 15.19-20p3)
66251 66251 1999 GJ2 from LINEAR (Sept. 15.36-41p5)
54686 54686 2001 DU8 from SSS (Sept. 15.64p5)
21374 21374 1997 WS22 from Atlante Obs. (Sept. 15.15p1)
16636 16636 1993 QP from Homburg-Erbach Obs. (Sept. 15.82-86p3)
03753 3753 Cruithne (1986 TO) from North Ryde Obs. (Sept. 14.72-73p2)
03200 3200 Phaethon (1983 TB) from LINEAR (Sept. 14.42-47p5)
02201 2201 Oljato (1947 XC) from MLS (Sept. 15.33-34p3)
01865 1865 Cerberus (1971 UA) from LINEAR (Sept. 15.36-40p3)

Observers on 16 September '07

Seventeen observing facilities appear in today's MPEC.

Code	Observer / observatory
`H55`	Astronomical Research Obs. in Illinois, 27 in MPEC 2007-S01 -- 2007 RZ8, 2007 RZ19, 2007 RY9, 2007 RY19, 2007 RX8, 2007 RX19, 2007 RW19, 2007 RV9, 2007 RV19, 2007 RV12, 2007 RU9, 2007 RU10, 2007 RT9, 2007 RT1, 2007 RS12, 2007 RP9, 2007 RP17, 2007 RG2, 2007 RF5, 2007 RF2, 2007 LQ19, 2005 YW55, 2004 VW14, 2004 MD6, 2003 TL4, 2002 TE66, 2001 YJ4
`J51`	Atlante Obs. in the Canary Islands, 1 in MPEC 2007-S01 -- 21374
`703`	Catalina Sky Survey in Arizona, 5 in MPEC 2007-S01 -- 2007 RE2, 1998 SV4, 87309, 86324, 159399
`A77`	Chante-Perdrix Obs. in France, 1 in MPEC 2007-S01 -- 2007 RU10
`A94`	Cormons Obs. in Italy, 1 in MPEC 2007-S01 -- 2007 PE8
`448`	Desert Moon Obs. in New Mexico, 4 in MPEC 2007-S01 -- 2007 RR12, 2007 RJ1, 2007 RF2, 2007 QA2
`151`	Eschenberg Obs. in Switzerland, 4 in MPEC 2007-S01 -- 2007 RU9, 2007 RR9, 1999 JU3, 1998 SD15
`B21`	Gaisberg Obs. in Austria, 1 in MPEC 2007-S01 -- 2007 RT17
`J95`	Great Shefford Obs. in England, 1 in MPEC 2007-S01 -- 2007 RJ1
`H51`	Greiner Research Obs. in Wisconsin, 1 in MPEC 2007-S01 -- 2007 RP15
`196`	Homburg-Erbach Obs. in Germany, 1 in MPEC 2007-S01 -- 16636
`704`	LINEAR in New Mexico, 13 in MPEC 2007-S01 -- 2007 RW19, 2007 RV19, 2007 RF5, 2007 PE8, 2005 GE59, 2002 SV, 1988 PA, 66251, 143678, 138883, 136617, 3200, 1865
`D35`	Lulin Minor Bodies Tracking in Taiwan, 3 in MPEC 2007-S01 -- 2007 RX19, 2007 RW19, 2007 RV19
`G96`	Mt. Lemmon Survey in Arizona, 4 in MPEC 2007-S01 -- 2005 TP45, 1999 SO5, 143651, 2201
`423`	North Ryde Obs. in New South Wales, 1 in MPEC 2007-S01 -- 3753
`E12`	Siding Spring Survey in New South Wales, 2 in MPEC 2007-S01 -- 2007 RA20, 54686
`291`	Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2007-S01 -- 2007 RV9, 2007 RU9, 2007 RT9, 2004 DM44

Impact Risk Monitoring on 16 September '07

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2355 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 RY19	NEODyS	1634	2015-2090	368	1.79e-05	-3.14	-3.82	0	NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2007/09/14.354 to 2007/09/15.461."
2007 RY19	JPL	1457	2015-2107	589	1.6e-05	-3.27	-4.22	0	JPL: "Analysis based on 15 observations spanning 1.1075 days (2007-Sep-14.35284 to 2007-Sep-15.46036)." Diameter approximately 0.138 km. from mean, weighted H=22.0.

2007 RX19	JPL	1457	R E M O V E D						JPL: Risk listing removed at 1402 UTC.

2007 RV9	JPL	1457	2030-2042	3	1.2e-08	-5.08	-5.33	0	JPL: "Analysis based on 42 observations spanning 5.1125 days (2007-Sep-10.28811 to 2007-Sep-15.40065)." Diameter approximately 0.364 km. from mean, weighted H=19.9.
2007 RV9	NEODyS	1457	2030-2054	4	1.19e-08	-5.07	-5.31	0	NEODyS: "Based on 43 optical observations (of which 1 are rejected as outliers) from 2007/09/10.289 to 2007/09/15.401."

2007 RU9	JPL	1457	2018-2069	7	1.9e-06	-3.04	-3.23	0	JPL: "Analysis based on 57 observations spanning 5.6475 days (2007-Sep-10.28596 to 2007-Sep-15.93348)." Diameter approximately 0.225 km. from mean, weighted H=20.9.
2007 RU9	NEODyS	1457	2018-2030	3	2.03e-06	-3.02	-3.22	0	NEODyS: "Based on 59 optical observations (of which 2 are rejected as outliers) from 2007/09/10.287 to 2007/09/15.934."

2007 RT9	JPL	1457	2028-2107	22	4.2e-08	-4.81	-5.30	0	JPL: "Analysis based on 35 observations spanning 5.1040 days (2007-Sep-10.28434 to 2007-Sep-15.38835)." Diameter approximately 0.376 km. from mean, weighted H=19.8.
2007 RT9	NEODyS	1457	2028-2088	18	4.44e-08	-4.77	-5.27	0	NEODyS: "Based on 35 optical observations (of which 0 are rejected as outliers) from 2007/09/10.285 to 2007/09/15.389."

2007 RA20	JPL	1457	R E M O V E D						JPL: Risk listing removed at 1242 UTC.

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 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 this.

Chronology on 16 September '07

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

2223	Added A/CC news report, "Daily news format change"
1634	Noted that NEODyS has posted 2007 RY19 as an impact risk - see above
1458	Grabbed MPEC 2007-S01 - Daily Orbit Update - see above
1457	Noted that JPL has removed 2007 RA20 as an impact risk - see above Noted that JPL has updated its 2007 RT9 risk assessment - see above Noted that NEODyS has updated its 2007 RT9 risk assessment - see above Noted that JPL has updated its 2007 RU9 risk assessment - see above Noted that NEODyS has updated its 2007 RU9 risk assessment - see above Noted that JPL has updated its 2007 RV9 risk assessment - see above Noted that NEODyS has updated its 2007 RV9 risk assessment - see above Noted that JPL has removed 2007 RX19 as an impact risk - see above Noted that JPL has updated its 2007 RY19 risk assessment - see above

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