2008-09-07 Tracking News

Contents on 7 September '08

IAU Minor Planet Center
- NEOCP Activity -- 22 listings: 5 new, 17 updated
- New MPECs -- one MPEC
Observers -- fourteen observing facilities
Impact Risk Monitoring -- three objects
Chronology

Note: These A/CC news pages will update less often and at irregular intervals through Wednesday, September 10th.

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 A/CC news is available via framed access, RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate 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 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 7 September '08

The MPC's NEO Confirmation Page has 22 listings: 5 new, 17 updated

When last checked at 2357 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had five new and seventeen updated listings. Of these, nine 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 7 September '08

Minor Planet Electronic Circulars

As of last check at 2357 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 7 Sept. '08 >> MPEC 2008-R32 - "06:08 UT" - Daily Orbit Update

Observations of risk-listed objects
K08R01J 2008 RJ1 (arc=2 days, H=17.5 ~1.07 km) from Junk Bond Obs. (Sept. 5.42-44p2) and the Spacewatch 1.8m telescope (Sept. 6.24-29p3)
K08R01H 2008 RH1 (small asteroid, arc=2 days, H=22.5 ~107m) from Spacewatch 1.8m (Sept. 6.33-34p3)
K08R01G 2008 RG1 (arc=2 days, H=20.7 ~245m) from Junk Bond Obs. (Sept. 5.43-47p5) and Spacewatch 1.8m (Sept. 6.31-32p3)
Observations of recently (no longer) risk-listed objects
K08R00V 2008 RV (arc=4 days, H=21.7 ~155m) from Mt. John Obs. (Sept. 6.50-51p3)
K08Q11T 2008 QT11 (small asteroid, arc=10 days, H=22.5 ~107m) from the Siding Spring Survey (SSS) (Sept. 6.68p1)
K08Q11S 2008 QS11 (arc=10 days, H=19.8 ~371m) from CEAMIG-REA (Sept. 6.19-21p5), Mt. John Obs. (Sept. 6.49-50p3), and SSS (Sept. 6.67-68p2)
K08Q03T 2008 QT3 (arc=11 days, H=18.4 ~708m) from Goodricke-Pigott Obs. (Sept. 5.20-23p3)
Observations of small asteroids (H>22.0)
K08R01K 2008 RK1 (Q=4.323 AU, arc=2 days, H=22.3 ~117m) from Spacewatch 1.8m (Sept. 6.35-37p3)
K08R01E 2008 RE1 (arc=4 days, H=22.8 ~93m) from SSS (Sept. 6.61p1)
K08R00U 2008 RU (arc=4 days, H=22.3 ~117m) from SSS (Sept. 6.40p2)
Observations of almost-small asteroids (21.7<H<=22.0)
K08O08M 2008 OM8 (arc=38 days, H=22.0 ~135m) from SSS (Sept. 6.67p1)
Observations of other objects
K08R00T 2008 RT (arc=5 days, H=19.6 ~407m) from Desert Moon Obs. (Sept. 6.35-37p3) and SSS (Sept. 6.73-76p4)
K08K28V 2008 KV28 (arc=98 days, H=20.3 ~295m) from Spacewatch 1.8m (Sept. 6.15-16p3)
K08J24O 2008 JO24 (arc=119 days, H=18.6 ~645m) from SSS (Sept. 6.67-68p2)
K07S01R 2007 SR1 (arc=2 opp, H=19.8 ~371m) from Desert Moon Obs. (Sept. 6.25-27p2)
K05T51Z 2005 TZ51 (arc=3 opp, H=17.9 ~891m) from Petit Jean Mtn. South Obs. (PJMSO) (Sept. 7.21-22p5)
K05B00C 2005 BC (arc=2 opp, H=18.0 ~851m) from the Catalina Sky Survey (CSS) (Sept. 6.13-15p4)
K04X44N 2004 XN44 (arc=2 opp, H=18.4 ~708m) from the Spacewatch 0.9m telescope (Sept. 6.30-34p3)
K04S56B 2004 SB56 (arc=2 opp, H=19.3 ~467m) from PJMSO (Sept. 7.18-19p5)
K03G00W 2003 GW (i=49.4°, arc=3 opp, H=16.8 ~1.48 km) from PJMSO (Sept. 7.17p5)
K02V17V 2002 VV17 (arc=4 opp, H=20.0 ~339m) from Alter Satzberg Obs. (Sept. 6.83-84p3)
K02Q06Y 2002 QY6 (q=0.246 AU, arc=4 opp, H=19.6 ~407m) from CSS (Sept. 6.38-40p3)
K01SQ9W 2001 SW269 (arc=4 opp, H=19.5 ~426m) from PJMSO (Sept. 7.18p6)
J99R27J 1999 RJ27 (arc=2 opp, H=19.5 ~426m) from Spacewatch 0.9m (Sept. 6.24-27p3)
J94A01W 1994 AW1 (arc=3 opp, H=17.5 ~1.07 km) from LINEAR (Sept. 6.12-18p5) and PJMSO (Sept. 7.15p6)
J0208 190208 2006 AQ from the Mt. Lemmon Survey (MLS) (Sept. 6.15-17p8)
I9062 189062 2000 VA45 from SSS (Sept. 6.50-53p4)
G3335 163335 2002 LJ from CSS (Sept. 6.11-13p4)
G3000 163000 2001 SW169 from La Sagra Obs. (Sept. 6.16-19p3) and CSS (Sept. 6.34-37p4)
E4901 144901 2004 WG1 from SSS (Sept. 6.78-81p3)
E0288 140288 2001 SN289 from CSS (Sept. 6.31-33p4)
65733 65733 1993 PC from Spacewatch 0.9m (Sept. 6.23-27p3)
11405 11405 1999 CV3 from SSS (Sept. 6.73-76p3)
07888 7888 1993 UC from CSS (Sept. 6.28-30p4)
05011 5011 Ptah (6743 P-L) from CSS (Sept. 6.34-36p4)
04660 4660 Nereus (1982 DB) from MLS (Sept. 6.13-15p4)
03352 3352 McAuliffe (1981 CW) from La Sagra Obs. (Sept. 6.11-13p3) and CSS (Sept. 6.28-30p3)

Observers on 7 September '08

Fourteen observing facilities appear in today's MPEC.

Code	Observer / observatory
`B03`	Alter Satzberg Obs. in Austria, 1 in MPEC 2008-R32 -- 2002 VV17
`I77`	CEAMIG-REA in Brazil, 1 in MPEC 2008-R32 -- 2008 QS11
`703`	Catalina Sky Survey (CSS) in Arizona, 8 in MPEC 2008-R32 -- 2005 BC, 2002 QY6, 163335, 163000, 140288, 7888, 5011, 3352
`448`	Desert Moon Obs. in New Mexico, 2 in MPEC 2008-R32 -- 2008 RT, 2007 SR1
`683`	Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-R32 -- 2008 QT3
`701`	Junk Bond Obs. in Arizona, 2 in MPEC 2008-R32 -- 2008 RJ1, 2008 RG1
`704`	LINEAR in New Mexico, 1 in MPEC 2008-R32 -- 1994 AW1
`J75`	La Sagra Obs. in Spain, 2 in MPEC 2008-R32 -- 163000, 3352
`474`	Mt. John Obs. in New Zealand, 2 in MPEC 2008-R32 -- 2008 RV, 2008 QS11
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2008-R32 -- 190208, 4660
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2008-R32 -- 2005 TZ51, 2004 SB56, 2003 GW, 2001 SW269, 1994 AW1
`E12`	Siding Spring Survey (SSS) in New South Wales, 10 in MPEC 2008-R32 -- 2008 RU, 2008 RT, 2008 RE1, 2008 QT11, 2008 QS11, 2008 OM8, 2008 JO24, 189062, 144901, 11405
`691`	Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2008-R32 -- 2004 XN44, 1999 RJ27, 65733
`291`	Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2008-R32 -- 2008 RK1, 2008 RJ1, 2008 RH1, 2008 RG1, 2008 KV28

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring on 7 September '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2357 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
Note that the time horizon for JPL is 100 years from today and for NEODyS is 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

2008 RJ1	JPL Sentry	1627	2017-2074	11	8.1e-09	-3.76	-4.04	0	JPL: "Analysis based on 17 observations spanning 1.8842 days (2008-Sep-04.40474 to 2008-Sep-06.28897)." Diameter approximately 1.300 km. from mean, weighted H=17.1.
2008 RJ1	NEODyS	1627	2010-2077	21	1.18e-08	-2.89	-2.93	0	NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2008/09/04.405 to 2008/09/06.290."

2008 RH1	NEODyS	1627	R E M O V E D						-

2008 RG1	NEODyS	1627	R E M O V E D						-
2008 RG1	JPL Sentry	1627	R E M O V E D						JPL: Risk listing removed at 0852 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 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 7 September '08

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

1627

Noted that JPL Sentry has removed 2008 RG1 as an impact risk - see above
Noted that NEODyS has removed 2008 RG1 as an impact risk - see above
Noted that NEODyS has removed 2008 RH1 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 RJ1 risk assessment - see above
Noted that NEODyS has updated its 2008 RJ1 risk assessment - see above
Grabbed MPEC 2008-R32 - Daily Orbit Update - see above

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