18 Sep '07 Tracking News

Contents on 18 September '07

IAU Minor Planet Center
- NEOCP Activity -- eleven listings: 3 new, 8 updated
- New MPECs -- five MPECs
- Observers -- fifteen observing facilities
Impact Risk Monitoring -- four 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.

NEOCP Activity on 18 September '07

The MPC's NEO Confirmation Page has 11 listings: 3 new, 8 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and eight updated listings. Of these, eight were "one nighters." So far Tracking News has counted a total of eighteen 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 18 September '07

Minor Planet Electronic Circulars

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

MPEC 2007-S12 time-stamped "06:09 UT" - Daily Orbit Update - see below
MPEC 2007-S13 time-stamped "18:46 UT" - 2007 RS146 - see below
MPEC 2007-S14 time-stamped "18:55 UT" - 2007 RT146 - see below
MPEC 2007-S15 time-stamped "18:59 UT" - 2007 SH - see below
MPEC 2007-S16 time-stamped "22:45 UT" - Comet P/1999 R1 = 2003 R5 = 2007 R5 (SOHO)

MPEC 2007-S16 - "22:45 UT" - Comet P/1999 R1 = 2003 R5 = 2007 R5 (SOHO)

PK07R050 P/2007 R5 (q=0.054 AU, Q=4.978 AU, TP=2007 Sept. 11.31967 TT) from the LASCO Coronagraph 2 on the Solar & Heliospheric Obs. (SOHO) (Sept. 10.29-48p28, 10.81p2 & 10.88-02p20) and the LASCO Coronagraph 3 on the Solar & Heliospheric Obs. (SOHO) (Sept. 11.01-03p4, 11.07-28p22, 11.32-53p22, 11.57-78p22, 11.85-93p12, 11.97-03p8 & 12.07-26p20)
CK03R050 C/2003 R5 (SOHO) (q=0.057 AU, Q=4.991 AU, TP=2003 Sept. 8.81649 TT) from SOHO C2 (2003 Sept. 8.19-42p34)
CJ99R010 C/1999 R1 (SOHO) (q=0.056 AU, Q=4.988 AU, TP=1999 Sept. 5.51913 TT) from SOHO C2 (1999 Sept. 4.85p2, 1999 Sept. 4.90-94p8 & 1999 Sept. 4.98-09p16)

MPEC 2007-S15 - "18:59 UT" - 2007 SH

K07S00H 2007 SH (small asteroid, Earth MOID=4.3 LD, H=26.5 ~17m) was discovered at 0537 UT 17 Sept. by LINEAR, which observed it at Sept. 17.23-28p4. The discovery was confirmed by Great Shefford Obs. (Sept. 17.00p5), McCarthy Obs. (Sept. 18.20-21p3), and Sabino Canyon Obs. (Sept. 18.32p3).

MPEC 2007-S14 - "18:55 UT" - 2007 RT146

K07RE6T 2007 RT146 (risk-listed, H=18.6 ~645m) was discovered at 0927 UT 15 Sept. by the Mt. Lemmon Survey (MLS), which observed it at Sept. 15.39-41p3, 15.47-48p4, and 18.40-42p4. The discovery was confirmed by Great Shefford Obs. (Sept. 18.10-11p2 & 18.18-19p2).

MPEC 2007-S13 - "18:46 UT" - 2007 RS146

K07RE6S 2007 RS146 (small asteroid, Earth MOID=9.1 LD, H=23.4 ~71m) was discovered at 0831 UT 15 Sept. by the Catalina Sky Survey (CSS), which observed it at Sept. 15.32-36p8. The discovery was confirmed by MLS (Sept. 18.31p4).

<< DOU on 18 Sept. '07 >> MPEC 2007-S12 - "06:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K07R09V 2007 RV9 (arc=8 days, H=20.1 ~323m) from Astronomical Research Obs. (ARO) (Sept. 16.09-13p5) and Great Shefford Obs. (Sept. 17.86-88p2)
K07R09U 2007 RU9 (arc=6 days, H=20.8 ~234m) from ARO (Sept. 16.16-17p3)
Observations of recently (no longer) risk-listed objects
K07R20A 2007 RA20 (arc=3 days, H=20.0 ~339m) from Mt. John Obs. (Sept. 17.53-54p3)
K07R12T 2007 RT12 (small asteroid, arc=5 days, H=23.8 ~59m) from ARO (Sept. 17.24-25p3)
K07R09R 2007 RR9 (Q=4.699 AU, arc=7 days, H=20.2 ~309m) from ARO (Sept. 16.10-11p3) and LINEAR (Sept. 17.19-23p3)
K07R02F 2007 RF2 (arc=12 days, H=20.7 ~245m) from Greiner Research Obs. (Sept. 17.33-34p6) and Petit Jean Mtn. South Obs. (PJMSO) (Sept. 17.41p6)
K07R01J 2007 RJ1 (small asteroid, arc=13 days, H=25.2 ~31m) from Madonna di Dossobuono Obs. (Sept. 14.94p3)
Observations of small asteroids (H>22.0)
K07RD3O 2007 RO133 (arc=3 days, H=24.9 ~35m) from Great Shefford Obs. (Sept. 18.09p3)
K07RD3N 2007 RN133 (arc=3 days, H=25.1 ~32m) from Great Shefford Obs. (Sept. 17.85p3)
K07R17R 2007 RR17 (arc=4 days, H=23.7 ~62m) from PJMSO (Sept. 17.42p7)
K07R17Q 2007 RQ17 (arc=4 days, H=22.7 ~98m) from ARO (Sept. 17.05-06p3)
K07R17O 2007 RO17 (arc=4 days, H=25.8 ~23m) from ARO (Sept. 16.12-15p3)
K07R15P 2007 RP15 (arc=4 days, H=22.7 ~98m) from Greiner Research Obs. (Sept. 17.16-17p4)
K07R12P 2007 RP12 (arc=5 days, H=24.5 ~43m) from ARO (Sept. 16.19-21p3)
K07R09S 2007 RS9 (arc=6 days, H=24.6 ~41m) from ARO (Sept. 16.20p2)
K07R09P 2007 RP9 (arc=6 days, H=23.1 ~81m) from ARO (Sept. 16.08-09p3)
K07R08Y 2007 RY8 (arc=8 days, H=25.2 ~31m) from ARO (Sept. 17.21-23p3)
K07R02G 2007 RG2 (arc=10 days, H=23.8 ~59m) from ARO (Sept. 14.30-31p3)
K07R01O 2007 RO1 (arc=12 days, H=23.5 ~68m) from ARO (Sept. 16.11-12p3)
Observations of other objects
K07R20D 2007 RD20 (arc=3 days, H=21.1 ~204m) from Mt. John Obs. (Sept. 17.57p3)
K07R19V 2007 RV19 (Q=5.487 AU, arc=3 days, H=18.8 ~589m) from PJMSO (Sept. 17.23-24p7)
K07R17W 2007 RW17 (arc=4 days, H=21.2 ~195m) from Mt. John Obs. (Sept. 17.37-38p4)
K07R12R 2007 RR12 (arc=5 days, H=19.8 ~371m) from Greiner Research Obs. (Sept. 17.31-32p6) and PJMSO (Sept. 17.39-41p8)
K07R10U 2007 RU10 (arc=6 days, H=18.9 ~562m) from ARO (Sept. 17.08p3)
K07R05F 2007 RF5 (arc=12 days, H=18.5 ~676m) from Greiner Research Obs. (Sept. 17.35-37p10)
K07R01D 2007 RD1 (arc=15 days, H=21.6 ~162m) from PJMSO (Sept. 17.36-37p6)
K07Q02K 2007 QK2 (arc=27 days, H=20.6 ~257m) from LINEAR (Sept. 17.18-23p5) and PJMSO (Sept. 17.28p6)
K07P11U 2007 PU11 (Q=4.384 AU, arc=3 opp, H=16.3 ~1.86 km) from Iluro Obs. (Sept. 17.02-03p3) and PJMSO (Sept. 17.39p6)
K07P08E 2007 PE8 (arc=126 days, H=19.4 ~446m) from Iluro Obs. (Sept. 16.93-94p2), LINEAR (Sept. 17.23-27p3), and PJMSO (Sept. 17.30-31p6)
K07O00V 2007 OV (arc=63 days, H=19.2 ~490m) from LINEAR (Sept. 17.24-29p5) and PJMSO (Sept. 17.37-38p6)
K07L32R 2007 LR32 (arc=115 days, H=17.2 ~1.23 km) from Aichtal Obs. (Sept. 16.88-89p4) and PJMSO (Sept. 17.31-33p5)
K07L15B 2007 LB15 (arc=96 days, H=19.5 ~426m) from ARO (Sept. 17.06p1)
K07L08V 2007 LV8 (arc=96 days, H=20.2 ~309m) from ARO (Sept. 16.06p2)
K07H15E 2007 HE15 (arc=148 days, H=19.6 ~407m) from PJMSO (Sept. 17.35-36p6)
K07G05W 2007 GW5 (arc=156 days, H=21.4 ~178m) from Mt. John Obs. (Sept. 17.67-69p4)
K07D41A 2007 DA41 (arc=3 opp, H=17.6 ~1.02 km) from PJMSO (Sept. 17.34-35p7)
K06W02Y 2006 WY2 (arc=2 opp, H=18.6 ~645m) from Mt. John Obs. (Sept. 17.71-72p5)
K05T50R 2005 TR50 (arc=2 opp, H=20.2 ~309m) from Mt. John Obs. (Sept. 17.59-61p4)
K04O11T 2004 OT11 (arc=3 opp, H=17.3 ~1.17 km) from LINEAR (Sept. 17.12-16p5)
K04E21T 2004 ET21 (i=41.6°, arc=2 opp, H=20.6 ~257m) from ARO (Sept. 17.14p3) and LINEAR (Sept. 17.23-28p4)
K03SM2W 2003 SW222 (arc=3 opp, H=17.2 ~1.23 km) from PJMSO (Sept. 17.29-30p5)
K03O14R 2003 OR14 (arc=3 opp, H=16.4 ~1.78 km) from PJMSO (Sept. 17.22-23p6)
K03N00C 2003 NC (q=0.274 AU, arc=3 opp, H=19.3 ~467m) from ARO (Sept. 17.08-10p2 at V=22.9-23.0)
K02S00V 2002 SV (arc=2 opp, H=19.8 ~371m) from PJMSO (Sept. 17.33-34p7)
J99J03U 1999 JU3 (arc=4 opp, H=19.2 ~490m) from PJMSO (Sept. 17.30p5)
J98S15D 1998 SD15 (arc=4 opp, H=19.2 ~490m) from PJMSO (Sept. 17.27p7)
F2787 152787 1999 TB10 from Isle of Man Obs. (Sept. 16.93-94p3) and LINEAR (Sept. 17.30-33p3)
E5656 145656 4788 P-L from PJMSO (Sept. 17.25p5)
E3678 143678 2003 SA224 from LINEAR (Sept. 17.35-40p5)
D8883 138883 2000 YL29 from LINEAR (Sept. 17.11-16p5)
22771 22771 1999 CU3 from Iluro Obs. (Sept. 17.11-12p2)
05143 5143 Heracles (1991 VL) from LINEAR (Sept. 17.18-23p5)
04183 4183 Cuno (1959 LM) from LINEAR (Sept. 17.18-23p5)
02212 2212 Hephaistos (1978 SB) from Iluro Obs. (Sept. 17.04-05p3)

Observers on 18 September '07

Fifteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`A62`	Aichtal Obs. in Germany, 1 in MPEC 2007-S12 -- 2007 LR32
`H55`	Astronomical Research Obs. in Illinois, 17 in MPEC 2007-S12 -- 2007 RY8, 2007 RV9, 2007 RU9, 2007 RU10, 2007 RT12, 2007 RS9, 2007 RR9, 2007 RQ17, 2007 RP9, 2007 RP12, 2007 RO17, 2007 RO1, 2007 RG2, 2007 LV8, 2007 LB15, 2004 ET21, 2003 NC
`703`	Catalina Sky Survey in Arizona, 1 in MPEC 2007-S13 -- 2007 RS146
`J95`	Great Shefford Obs. in England, 5 in MPECs 2007-S12, 2007-S14 & 2007-S15 -- 2007 SH, 2007 RV9, 2007 RT146, 2007 RO133, 2007 RN133
`H51`	Greiner Research Obs. in Wisconsin, 4 in MPEC 2007-S12 -- 2007 RR12, 2007 RP15, 2007 RF5, 2007 RF2
`B19`	Iluro Obs. in Spain, 4 in MPEC 2007-S12 -- 2007 PU11, 2007 PE8, 22771, 2212
`987`	Isle of Man Obs. on the Isle of Man, 1 in MPEC 2007-S12 -- 152787
`704`	LINEAR in New Mexico, 12 in MPECs 2007-S12 & 2007-S15 -- 2007 SH, 2007 RR9, 2007 QK2, 2007 PE8, 2007 OV, 2004 OT11, 2004 ET21, 152787, 143678, 138883, 5143, 4183
`560`	Madonna di Dossobuono Obs. in Italy, 1 in MPEC 2007-S12 -- 2007 RJ1
`932`	McCarthy Obs. in Connecticut, 1 in MPEC 2007-S15 -- 2007 SH
`474`	Mt. John Obs. in New Zealand, 6 in MPEC 2007-S12 -- 2007 RW17, 2007 RD20, 2007 RA20, 2007 GW5, 2006 WY2, 2005 TR50
`G96`	Mt. Lemmon Survey in Arizona, 2 in MPECs 2007-S13 & 2007-S14 -- 2007 RT146, 2007 RS146
`H45`	Petit Jean Mtn. South Obs. in Arkansas, 18 in MPEC 2007-S12 -- 2007 RV19, 2007 RR17, 2007 RR12, 2007 RF2, 2007 RD1, 2007 QK2, 2007 PU11, 2007 PE8, 2007 OV, 2007 LR32, 2007 HE15, 2007 DA41, 2003 SW222, 2003 OR14, 2002 SV, 1999 JU3, 1998 SD15, 145656
`854`	Sabino Canyon Obs. in Arizona, 1 in MPEC 2007-S15 -- 2007 SH
`2492`	LASCO Coronagraph 2 via the Solar & Heliospheric Obs. in Earth-Sun L1 HALO orbit, 3 in MPEC 2007-S16 -- 2007 R5, 2003 R5, 1999 R1
`2493`	LASCO Coronagraph 3 via the Solar & Heliospheric Obs. in Earth-Sun L1 HALO orbit, 1 in MPEC 2007-S16 -- 2007 R5

Impact Risk Monitoring on 18 September '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 RV9	JPL	1404	R E M O V E D						JPL: Risk listing removed at 1017 UTC.
2007 RV9	NEODyS	1404	R E M O V E D

2007 RU9	NEODyS	1405	2018-2030	3	1.36e-06	-3.25	-3.57	0	NEODyS: "Based on 66 optical observations (of which 2 are rejected as outliers) from 2007/09/10.287 to 2007/09/16.171."
2007 RU9	JPL	1404	2018-2069	6	1.2e-06	-3.28	-3.59	0	JPL: "Analysis based on 64 observations spanning 5.8843 days (2007-Sep-10.28596 to 2007-Sep-16.1703)." Diameter approximately 0.223 km. from mean, weighted H=20.9.

2007 RT146	JPL	2303	2015-2062	15	2.7e-09	-5.11	-5.62	0	JPL: "Analysis based on 15 observations spanning 3.0228 days (2007-Sep-15.39403 to 2007-Sep-18.41686)." Diameter approximately 0.630 km. from mean, weighted H=18.6.

2007 RQ133	NEODyS	1405	2012-2090	13	5.73e-10	-4.83	-5.13	0	NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2007/09/15.476 to 2007/09/17.131."

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 18 September '07

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

2323	Grabbed MPEC 2007-S16 - Comet P/1999 R1 = 2003 R5 = 2007 R5 (SOHO) - see above
2303	Noted that JPL has posted 2007 RT146 as an impact risk - see above
1931	Grabbed MPEC 2007-S13 - 2007 RS146 - see above Grabbed MPEC 2007-S14 - 2007 RT146 - see above Grabbed MPEC 2007-S15 - 2007 SH - see above
1405	Noted that NEODyS has updated its 2007 RU9 risk assessment - see above Grabbed MPEC 2007-S12 - Daily Orbit Update - see above
1404	Noted that NEODyS has posted 2007 RQ133 as an impact risk - see above Noted that JPL has updated its 2007 RU9 risk assessment - see above Noted that JPL has removed 2007 RV9 as an impact risk - see above Noted that NEODyS has removed 2007 RV9 as an impact risk - see above

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