26 Sep '07 Tracking News

Contents on 26 September '07

IAU Minor Planet Center
- NEOCP Activity -- four listings: 3 new, 1 updated
- New MPECs -- one MPEC
- Observers -- twelve observing facilities
Impact Risk Monitoring -- one object reported
Chronology

Resources:

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

Notes: Due to travel, these pages will update irregularly for the rest of the month.
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 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 26 September '07

The MPC's NEO Confirmation Page has 4 listings: 3 new, 1 updated

When last checked at 1531 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and one updated listings. Of these, two were "one nighters."

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 26 September '07

Minor Planet Electronic Circulars

As of last check at 1531 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 26 Sept. '07 >> MPEC 2007-S58 - "06:08 UT" - Daily Orbit Update

Observations of recently (no longer) risk-listed objects
K07R20A 2007 RA20 (arc=10 days, H=20.1 ~323m) from the Siding Spring Survey (SSS) (Sept. 24.77p2)
Observations of small asteroids (H>22.0)
K07S06O 2007 SO6 (arc=3 days, H=25.2 ~31m) from SSS (Sept. 24.74-75p2)
K07S01S 2007 SS1 (arc=5 days, H=23.6 ~65m) from SSS (Sept. 24.77-78p2)
K07R19Z 2007 RZ19 (arc=11 days, H=22.2 ~123m) from the Mt. Lemmon Survey (MLS) (Sept. 25.33-35p4)
K07R12S 2007 RS12 (arc=8 days, H=23.2 ~78m) from the Spacewatch 0.9m telescope (Sept. 20.47-50p3)
K07R08X 2007 RX8 (arc=17 days, H=24.5 ~43m) from MLS (Sept. 25.27p4)
Observations of other objects
K07S11E 2007 SE11 (i=47.5°, arc=5 days, H=17.6 ~1.02 km) from SSS (Sept. 24.78-79p2 & 25.79p1)
K07S06P 2007 SP6 (arc=3 days, H=18.0 ~851m) from SSS (Sept. 24.79p1)
K07RD3P 2007 RP133 (Q=4.088 AU, arc=10 days, H=20.7 ~245m) from Astronomical Research Obs. (ARO) (Sept. 24.26-27p3) and Desert Moon Obs. (Sept. 25.22-24p3)
K07R19V 2007 RV19 (Q=5.385 AU, arc=11 days, H=18.8 ~589m) from Desert Moon Obs. (Sept. 25.19-20p3) and SSS (Sept. 25.46-47p2)
K07R12R 2007 RR12 (arc=13 days, H=19.9 ~355m) from Desert Moon Obs. (Sept. 25.25-26p4)
K07R09Q 2007 RQ9 (q=2.236 AU, arc=112 days, H=15.5 ~2.69 km) from Desert Moon Obs. (Sept. 25.09-12p2)
K07Q02A 2007 QA2 (arc=36 days, H=20.7 ~245m) from Andrushivka Obs. (Sept. 21.85-87p4)
K07P28F 2007 PF28 (arc=15 days, H=19.3 ~467m) from Bisei Spaceguard Center (Bisei) (Aug. 28.60p6)
K07P11U 2007 PU11 (Q=4.384 AU, arc=3 opp, H=16.3 ~1.86 km) from Bisei (Sept. 5.77-78p5) and Hadano Obs. (Sept. 15.62-63p5)
K07P08E 2007 PE8 (arc=129 days, H=19.4 ~446m) from Bisei (Sept. 2.60-61p5)
K07M06L 2007 ML6 (arc=95 days, H=18.6 ~645m) from SSS (Sept. 24.76p2)
K07L32R 2007 LR32 (arc=120 days, H=17.2 ~1.23 km) from Hadano Obs. (Sept. 17.51-52p5) and Hormersdorf Obs. (Sept. 20.80-81p5)
K06A00D 2006 AD (i=55.0°, arc=3 opp, H=16.7 ~1.55 km) from SSS (Sept. 25.78p1)
K05X77W 2005 XW77 (arc=2 opp, H=20.8 ~234m) from MLS (Sept. 25.22-24p4)
K05S71A 2005 SA71 (arc=2 opp, H=18.8 ~589m) from SSS (Sept. 24.79p2)
K04XG4P 2004 XP164 (arc=3 opp, H=17.5 ~1.07 km) from SSS (Sept. 24.75-76p2)
K04O11T 2004 OT11 (arc=3 opp, H=17.3 ~1.17 km) from Santa Mama Obs. (Sept. 24.75-78p6)
K03B47T 2003 BT47 (arc=3 opp, H=17.5 ~1.07 km) from Spacewatch 0.9m (Sept. 20.44p1)
K02U31A 2002 UA31 (arc=4 opp, H=18.8 ~589m) from Stia Obs. (Sept. 24.78-79p4)
K02S00V 2002 SV (arc=2 opp, H=19.8 ~371m) from Santa Mama Obs. (Sept. 24.81-83p6)
K02C26E 2002 CE26 (i=47.3°, arc=4 opp, H=16.8 ~1.48 km) from MLS (Sept. 25.14-16p4)
K01R47Y 2001 RY47 (arc=3 opp, H=19.4 ~446m) from SSS (Sept. 25.48p2 & 25.80p1)
K00R37W 2000 RW37 (arc=3 opp, H=20.0 ~339m) from Stia Obs. (Sept. 24.81-82p4)
J99J03U 1999 JU3 (arc=4 opp, H=19.2 ~490m) from Stia Obs. (Sept. 24.80-84p4)
J98S15D 1998 SD15 (arc=4 opp, H=19.1 ~513m) from Santa Mama Obs. (Sept. 24.79-81p6) and Dresden Obs. (Sept. 24.81-83p5)
J94A01W 1994 AW1 (arc=3 opp, H=17.5 ~1.07 km) from MLS (Sept. 25.44-46p4)
F9929 159929 2005 UK from MLS (Sept. 25.17-18p4)
B5052 115052 2003 RD6 from MLS (Sept. 25.11-13p4)
66959 66959 1999 XO35 from SSS (Sept. 25.40-41p3)
20826 20826 2000 UV13 from Bisei (Sept. 20.77-78p4)
06178 6178 1986 DA from Spacewatch 0.9m (Sept. 20.46-49p3)
03988 3988 1986 LA from MLS (Sept. 25.09-11p4)

Observers on 26 September '07

Twelve observing facilities appear in today's MPEC.

Code	Observer / observatory
`A50`	Andrushivka Obs. in the Ukraine, 1 in MPEC 2007-S58 -- 2007 QA2
`H55`	Astronomical Research Obs. in Illinois, 1 in MPEC 2007-S58 -- 2007 RP133
`300`	Bisei Spaceguard Center in Japan, 4 in MPEC 2007-S58 -- 2007 PU11, 2007 PF28, 2007 PE8, 20826
`448`	Desert Moon Obs. in New Mexico, 4 in MPEC 2007-S58 -- 2007 RV19, 2007 RR12, 2007 RQ9, 2007 RP133
`639`	Dresden Obs. in Germany, 1 in MPEC 2007-S58 -- 1998 SD15
`355`	Hadano Obs. in Japan, 2 in MPEC 2007-S58 -- 2007 PU11, 2007 LR32
`A35`	Hormersdorf Obs. in Germany, 1 in MPEC 2007-S58 -- 2007 LR32
`G96`	Mt. Lemmon Survey in Arizona, 8 in MPEC 2007-S58 -- 2007 RZ19, 2007 RX8, 2005 XW77, 2002 CE26, 1994 AW1, 159929, 115052, 3988
`B38`	Santa Mama Obs. in Italy, 3 in MPEC 2007-S58 -- 2004 OT11, 2002 SV, 1998 SD15
`E12`	Siding Spring Survey in New South Wales, 12 in MPEC 2007-S58 -- 2007 SS1, 2007 SP6, 2007 SO6, 2007 SE11, 2007 RV19, 2007 RA20, 2007 ML6, 2006 AD, 2005 SA71, 2004 XP164, 2001 RY47, 66959
`691`	Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2007-S58 -- 2007 RS12, 2003 BT47, 6178
`A78`	Stia Obs. in Italy, 3 in MPEC 2007-S58 -- 2002 UA31, 2000 RW37, 1999 JU3

Impact Risk Monitoring on 26 September '07

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 1532 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	0344	2024-2090	34	3.18e-05	-3.52	-3.81	0	NEODyS: "Based on 40 optical observations (of which 0 are rejected as outliers) from 2007/09/14.354 to 2007/09/25.166."

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 26 September '07

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

1532	Grabbed MPEC 2007-S58 - Daily Orbit Update - see above
0344	Noted that NEODyS has updated its 2007 RY19 risk assessment - see above

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