21 Sep '07 Tracking News

Contents on 21 September '07

IAU Minor Planet Center
- NEOCP Activity -- six listings: 3 new, 3 updated
- New MPECs -- three MPECs
- Observers -- 24 observing facilities
Impact Risk Monitoring -- one object reported
Chronology

Resources:

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

Note: Until September 16th this daily news page, which had included links to news and science papers as well as some occasional original reporting, was called Major News About Minor Objects. Without the news-link and science-link sections, this page was renamed as The Tracking News to more more accurately reflect its continuing purpose.

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 21 September '07

The MPC's NEO Confirmation Page has 6 listings: 3 new, 3 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and three updated listings. Of these, four were "one nighters." So far Tracking News has counted a total of twelve 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 21 September '07

Minor Planet Electronic Circulars

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

MPEC 2007-S37 time-stamped "06:09 UT" - Daily Orbit Update - see below
MPEC 2007-S38 time-stamped "17:08 UT" - 2007 SV2 - see below
MPEC 2007-S39 time-stamped "17:14 UT" - 2007 SW2

MPEC 2007-S39 - "17:14 UT" - 2007 SW2

K07S02W 2007 SW2 (H=21.3 ~186m) was discovered at 0705 UT 20 Sept. by the Catalina Sky Survey (CSS), which observed it at Sept. 20.30-32p4 and 20.39p4. The discovery was confirmed by Remanzacco Obs. (Sept. 20.85-87p3), Heidelberg-Konigstuhl Obs. (Sept. 20.86-89p3), Naef Obs. (Sept. 20.89-92p3), Schiaparelli Obs. (Sept. 20.93p1 & 21.01p1), Alter Satzberg Obs. (Sept. 21.09-11p6), and Cordell-Lorenz Obs. (Sept. 21.29-33p3).

MPEC 2007-S38 - "17:08 UT" - 2007 SV2

K07S02V 2007 SV2 (H=20.8 ~234m) was discovered at 0547 UT 20 Sept. by the Mt. Lemmon Survey (MLS), which observed it at Sept. 20.24-25p4. The discovery was confirmed by Schiaparelli Obs. (Sept. 20.91p1 & 20.96p1), Heidelberg-Konigstuhl Obs. (Sept. 20.91-94p3), and the Spacewatch 0.9m telescope (Sept. 21.31-32p3).

<< DOU on 21 Sept. '07 >> MPEC 2007-S37 - "06:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K07R09U 2007 RU9 (arc=8 days, H=20.8 ~234m) from LONEOS (Sept. 18.17-23p4)
Observations of recently (no longer) risk-listed objects
K07R20A 2007 RA20 (arc=6 days, H=20.1 ~323m) from Shenton Park Obs. (Sept. 20.75-76p3)
K07R01E 2007 RE1 (small asteroid, Q=4.265 AU, arc=18 days, H=22.1 ~129m) from CSS (Sept. 20.23-25p4) and Petit Jean Mtn. South Obs. (PJMSO) (Sept. 20.33-34p4)
Observations of small asteroids (H>22.0)
K07S01V 2007 SV1 (arc=1 day, H=24.6 ~41m) from Saint-Barthelemy Obs. (Sept. 20.84-85p5)
K07R19W 2007 RW19 (arc=6 days, H=24.7 ~39m) from Remanzacco Obs. (Sept. 19.85-86p2) and Schiaparelli Obs. (Sept. 20.14-15p3)
K07R15P 2007 RP15 (arc=6 days, H=22.8 ~93m) from Lumezzane Obs. (Sept. 18.98-99p3)
K07R12Q 2007 RQ12 (arc=7 days, H=23.6 ~65m) from the Siding Spring Survey (SSS) (Sept. 18.53-54p2)
K07R09Y 2007 RY9 (arc=7 days, H=23.5 ~68m) from SSS (Sept. 18.45-47p3)
Observations of other objects
K07R17V 2007 RV17 (arc=8 days, H=18.9 ~562m) from Shenton Park Obs. (Sept. 20.74-75p3)
K07R17U 2007 RU17 (q=0.358 AU, arc=7 days, H=18.1 ~812m) from PJMSO (Sept. 20.36-37p3)
K07R12R 2007 RR12 (arc=8 days, H=19.9 ~355m) from Astronomical Research Obs. (ARO) (Sept. 18.24-25p3), Lumezzane Obs. (Sept. 19.00-01p4), CSS (Sept. 20.30-32p4), Greiner Research Obs. (Sept. 20.34-35p4), and PJMSO (Sept. 20.38-39p7)
K07R05F 2007 RF5 (arc=15 days, H=18.5 ~676m) from Greiner Research Obs. (Sept. 20.32-33p9)
K07R01D 2007 RD1 (arc=18 days, H=21.6 ~162m) from PJMSO (Sept. 20.32-33p6)
K07Q02K 2007 QK2 (arc=30 days, H=20.6 ~257m) from PJMSO (Sept. 20.29p1)
K07P11U 2007 PU11 (Q=4.384 AU, arc=3 opp, H=16.3 ~1.86 km) from CSS (Sept. 20.30-32p4), PJMSO (Sept. 20.38p6), and Hamamatsu-Yuto Obs. (Sept. 20.63-64p11)
K07P08E 2007 PE8 (arc=129 days, H=19.4 ~446m) from PJMSO (Sept. 20.30-31p5)
K07P00Q 2007 PQ (arc=47 days, H=20.6 ~257m) from Spacewatch 0.9m (Sept. 20.13-16p3)
K07O00V 2007 OV (arc=66 days, H=19.2 ~490m) from Goodricke-Pigott Obs. (Sept. 19.28-30p3) and Spacewatch 0.9m (Sept. 20.35-39p3)
K07L32R 2007 LR32 (arc=118 days, H=17.2 ~1.23 km) from Guadarrama Obs. (Sept. 19.90-91p2), PJMSO (Sept. 20.30p5), Hamamatsu-Yuto Obs. (Sept. 20.53-55p5 & 20.61p1), and Gelenau Obs. (Sept. 20.83-85p4)
K07K04N 2007 KN4 (Q=5.446 AU, arc=3 opp, H=16.9 ~1.41 km) from CSS (Sept. 20.30-32p4)
K07H15E 2007 HE15 (arc=151 days, H=19.7 ~389m) from PJMSO (Sept. 20.34-35p6)
K07F42V 2007 FV42 (arc=182 days, H=17.9 ~891m) from SSS (Sept. 18.45-48p4)
K07DA3T 2007 DT103 (arc=2 opp, H=19.2 ~490m) from LONEOS (Sept. 18.25-32p4)
K07D08K 2007 DK8 (arc=213 days, H=19.0 ~537m) from SSS (Sept. 18.53-55p4)
K04T13R 2004 TR13 (arc=3 opp, H=18.5 ~676m) from CSS (Sept. 20.45-47p4)
K04S26D 2004 SD26 (arc=2 opp, H=18.7 ~616m) from CSS (Sept. 20.43-45p4)
K04D44M 2004 DM44 (Q=4.238 AU, arc=2 opp, H=20.7 ~245m) from CSS (Sept. 20.22-23p4)
K03SM2W 2003 SW222 (arc=3 opp, H=17.2 ~1.23 km) from PJMSO (Sept. 20.27-28p5)
K03O14R 2003 OR14 (arc=3 opp, H=16.4 ~1.78 km) from PJMSO (Sept. 20.23-24p5)
K02S00V 2002 SV (arc=2 opp, H=19.8 ~371m) from LONEOS (Sept. 15.22p1 & 15.27-29p2), Lumezzane Obs. (Sept. 18.94p4), PJMSO (Sept. 20.31p7), and Hamamatsu-Yuto Obs. (Sept. 20.59-60p4)
K02RB8C 2002 RC118 (Q=4.624 AU, arc=2 opp, H=16.8 ~1.48 km) from CSS (Sept. 20.31-32p3)
K01SR0A 2001 SA270 (i=38.5°, q=0.345 AU, arc=4 opp, H=18.0 ~851m) from Remanzacco Obs. (Sept. 19.82p3)
K00R37W 2000 RW37 (arc=3 opp, H=20.0 ~339m) from PJMSO (Sept. 20.35-36p5)
K00H14O 2000 HO14 (arc=3 opp, H=18.4 ~708m) from Spacewatch 0.9m (Sept. 20.34-38p3)
J99J03U 1999 JU3 (arc=4 opp, H=19.2 ~490m) from PJMSO (Sept. 20.25p5) and Eschenberg Obs. (Sept. 20.77p3)
J98S15D 1998 SD15 (arc=4 opp, H=19.2 ~490m) from Greiner Research Obs. (Sept. 20.12-13p5), PJMSO (Sept. 20.26p7), Hamamatsu-Yuto Obs. (Sept. 20.50-51p5), and Eschenberg Obs. (Sept. 20.76p7)
J97G28H 1997 GH28 (arc=5 opp, H=18.1 ~812m) from Spacewatch 0.9m (Sept. 20.22-26p3)
J88P00A 1988 PA (arc=3 opp, H=17.4 ~1.12 km) from LONEOS (Sept. 18.34-41p4) and Goodricke-Pigott Obs. (Sept. 19.37-40p3)
F3271 153271 2001 CL42 from Naef Obs. (Sept. 20.95-97p2)
F2787 152787 1999 TB10 from Andrushivka Obs. (Sept. 15.08-10p4) and CSS (Sept. 20.33-35p4)
A5140 105140 2000 NL10 from PJMSO (Sept. 20.24-25p5)
A0756 100756 1998 FM5 from Naef Obs. (Sept. 20.84-86p2)
68950 68950 2002 QF15 from CSS (Sept. 20.11-12p4) and MLS (Sept. 20.12-13p4)
16636 16636 1993 QP from Lumezzane Obs. (Sept. 18.95p4), PJMSO (Sept. 20.29p5), and Nazaret Obs. (Sept. 20.90-93p4)
06489 6489 Golevka (1991 JX) from CSS (Sept. 20.33-35p4)
05786 5786 Talos (1991 RC) from LONEOS (Sept. 18.25-32p4)
00433 433 Eros (1898 DQ) from Guadarrama Obs. (Sept. 19.85-86p2)

Observers on 21 September '07

A total of 24 observing facilities appear in today's MPECs.

Code	Observer / observatory
`B03`	Alter Satzberg Obs. in Austria, 1 in MPEC 2007-S39 -- 2007 SW2
`A50`	Andrushivka Obs. in the Ukraine, 1 in MPEC 2007-S37 -- 152787
`H55`	Astronomical Research Obs. in Illinois, 1 in MPEC 2007-S37 -- 2007 RR12
`703`	Catalina Sky Survey in Arizona, 12 in MPECs 2007-S37 & 2007-S39 -- 2007 SW2, 2007 RR12, 2007 RE1, 2007 PU11, 2007 KN4, 2004 TR13, 2004 SD26, 2004 DM44, 2002 RC118, 68950, 152787, 6489
`850`	Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2007-S39 -- 2007 SW2
`151`	Eschenberg Obs. in Switzerland, 2 in MPEC 2007-S37 -- 1999 JU3, 1998 SD15
`B32`	Gelenau Obs. in Germany, 1 in MPEC 2007-S37 -- 2007 LR32
`683`	Goodricke-Pigott Obs. in Arizona, 2 in MPEC 2007-S37 -- 2007 OV, 1988 PA
`H51`	Greiner Research Obs. in Wisconsin, 3 in MPEC 2007-S37 -- 2007 RR12, 2007 RF5, 1998 SD15
`458`	Guadarrama Obs. in Spain, 2 in MPEC 2007-S37 -- 2007 LR32, 433
`379`	Hamamatsu-Yuto Obs. in Japan, 4 in MPEC 2007-S37 -- 2007 PU11, 2007 LR32, 2002 SV, 1998 SD15
`024`	Heidelberg-Konigstuhl Obs. in Germany, 2 in MPECs 2007-S38 & 2007-S39 -- 2007 SW2, 2007 SV2
`699`	LONEOS in Arizona, 5 in MPEC 2007-S37 -- 2007 RU9, 2007 DT103, 2002 SV, 1988 PA, 5786
`130`	Lumezzane Obs. in Italy, 4 in MPEC 2007-S37 -- 2007 RR12, 2007 RP15, 2002 SV, 16636
`G96`	Mt. Lemmon Survey in Arizona, 2 in MPECs 2007-S37 & 2007-S38 -- 2007 SV2, 68950
`A13`	Naef Obs. in Switzerland, 3 in MPECs 2007-S37 & 2007-S39 -- 2007 SW2, 153271, 100756
`J47`	Nazaret Obs. in Spain, 1 in MPEC 2007-S37 -- 16636
`H45`	Petit Jean Mtn. South Obs. in Arkansas, 17 in MPEC 2007-S37 -- 2007 RU17, 2007 RR12, 2007 RE1, 2007 RD1, 2007 QK2, 2007 PU11, 2007 PE8, 2007 LR32, 2007 HE15, 2003 SW222, 2003 OR14, 2002 SV, 2000 RW37, 1999 JU3, 1998 SD15, 16636, 105140
`473`	Remanzacco Obs. in Italy, 3 in MPECs 2007-S37 & 2007-S39 -- 2007 SW2, 2007 RW19, 2001 SA270
`B04`	Saint-Barthelemy Obs. in Italy, 1 in MPEC 2007-S37 -- 2007 SV1
`204`	Schiaparelli Obs. in Italy, 3 in MPECs 2007-S37, 2007-S38 & 2007-S39 -- 2007 SW2, 2007 SV2, 2007 RW19
`D21`	Shenton Park Obs. in Western Australia, 2 in MPEC 2007-S37 -- 2007 RV17, 2007 RA20
`E12`	Siding Spring Survey in New South Wales, 4 in MPEC 2007-S37 -- 2007 RY9, 2007 RQ12, 2007 FV42, 2007 DK8
`691`	Spacewatch 0.9m telescope in Arizona, 5 in MPECs 2007-S37 & 2007-S38 -- 2007 SV2, 2007 PQ, 2007 OV, 2000 HO14, 1997 GH28

Impact Risk Monitoring on 21 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 RU9	JPL	1420	2020-2039	3	2.8e-07	-4.02	-4.20	0	JPL: "Analysis based on 74 observations spanning 7.9421 days (2007-Sep-10.28596 to 2007-Sep-18.22807)." Diameter approximately 0.230 km. from mean, weighted H=20.8.
2007 RU9	NEODyS	1420	2018-2030	2	2.43e-07	-4.14	-4.14	0	NEODyS: "Based on 76 optical observations (of which 2 are rejected as outliers) from 2007/09/10.287 to 2007/09/18.229."

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 21 September '07

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

1716	Grabbed MPEC 2007-S38 - 2007 SV2 - see above Grabbed MPEC 2007-S39 - 2007 SW2 - see above
1421	Grabbed MPEC 2007-S37 - Daily Orbit Update - see above
1420	Noted that JPL has updated its 2007 RU9 risk assessment - see above Noted that NEODyS has updated its 2007 RU9 risk assessment - see above

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