2008-09-25 Tracking News

Contents on 25 September '08

IAU Minor Planet Center
- NEOCP Activity -- four listings: 1 new, 3 updated
- New MPECs -- twelve MPECs
Observers -- 26 observing facilities
Impact Risk Monitoring -- three objects
Chronology

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 25 September '08

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

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and three updated listings. All of these were "one nighters." So far The 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 25 September '08

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been twelve MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-S50 time-stamped "04:38 UT" - 2008 SQ1 - see below
MPEC 2008-S51 time-stamped "06:08 UT" - Daily Orbit Update - see below
MPEC 2008-S52 time-stamped "17:13 UT" - 2008 SP7 - see below
MPEC 2008-S53 time-stamped "17:17 UT" - 2008 SQ7 - see below
MPEC 2008-S54 time-stamped "17:26 UT" - 2008 SR7 - see below
MPEC 2008-S55 time-stamped "17:39 UT" - 2008 SS7 - see below
MPEC 2008-S56 time-stamped "17:43 UT" - 2008 ST7 - see below
MPEC 2008-S57 time-stamped "18:56 UT" - 2008 SV7 - see below
MPEC 2008-S58 time-stamped "19:52 UT" - 2008 SW7 - see below
MPEC 2008-S59 time-stamped "20:40 UT" - 2008 QY - see below
MPEC 2008-S60 time-stamped "21:20 UT" - 2008 SF8 - see below
MPEC 2008-S61 time-stamped "23:12 UT" - 2008 RM98

MPEC 2008-S61 - "23:12 UT" - 2008 RM98

K08R98M 2008 RM98 (Q=4.267 AU, Earth MOID=3.5 LD, H=20.0 ~339m) was discovered at 0742 UT on 7 Sept. by the Mt. Lemmon Survey (MLS), which observed it at Sept. 7.32-34p4 and 25.21-35p15. The discovery was confirmed by Mt. John Obs. (Sept. 25.45p4) and Faulkes Telescope South (Sept. 25.64p3).

MPEC 2008-S60 - "21:20 UT" - 2008 SF8

K08S08F 2008 SF8 (small asteroid, Q=4.495 AU, H=23.7 ~62m) was discovered at 0501 UT on 25 Sept. by MLS, which observed it at Sept. 25.21-23p4 and 25.29-36p8. The discovery was confirmed by Mt. John Obs. (Sept. 25.46p3) and Great Shefford Obs. (Sept. 25.84-85p3).

MPEC 2008-S59 - "20:40 UT" - 2008 QY

K08Q00Y 2008 QY (H=18.5 ~676m) from Rob Matson using the Palomar Digitized Sky Survey (1989 Sept. 30.42p1, 1989 Sept. 30.48p1, 1989 Oct. 4.38p1 & 1989 Oct. 4.44p1), Astronomical Research Obs. (ARO) (Sept. 17.38-40p3), and the Spacewatch 1.8m telescope (Sept. 24.35-36p2)

MPEC 2008-S58 - "19:52 UT" - 2008 SW7

K08S07W 2008 SW7 (small asteroid, H=24.3 ~47m) was discovered at 0411 UT on 23 Sept. by LINEAR, which observed it at Sept. 23.17-22p5 and 24.22-27p10.

MPEC 2008-S57 - "18:56 UT" - 2008 SV7

K08S07V 2008 SV7 (H=21.2 ~195m) was discovered at 0758 UT on 24 Sept. by the Catalina Sky Survey (CSS), which observed it at Sept. 24.33-39p8. The discovery was confirmed by ARO (Sept. 24.41-43p3) and MLS (Sept. 25.43-45p8).

MPEC 2008-S56 - "17:43 UT" - 2008 ST7

K08S07T 2008 ST7 (risk-listed, Earth MOID=0.5 LD, H=24.0 ~54m) was discovered at 0711 UT on 24 Sept. by MLS, which observed it at Sept. 24.30-32p4, 24.37-46p12, and 25.38-40p4. The discovery was confirmed by ARO (Sept. 24.38-39p3), Spacewatch 1.8m (Sept. 24.39-40p3 & 25.24-25p3), and Mt. John Obs. (Sept. 25.51-53p3).

MPEC 2008-S55 - "17:39 UT" - 2008 SS7

K08S07S 2008 SS7 (Q=4.058 AU, H=21.1 ~204m) was discovered at 0447 UT on 24 Sept. by MLS, which observed it at Sept. 24.20-36p15 and 25.18-21p4. The discovery was confirmed by ARO (Sept. 24.25-26p3), Spacewatch 1.8m (Sept. 24.26-27p3 & 25.14p3), Mt. John Obs. (Sept. 24.47-48p4 & 25.43-44p3), and Sandlot Obs. (Sept. 25.21-23p3).

MPEC 2008-S54 - "17:26 UT" - 2008 SR7

K08S07R 2008 SR7 (H=20.0 ~339m) was discovered at 0309 UT on 24 Sept. by CSS, which observed it at Sept. 24.13-15p4 and 24.19-22p3. The discovery was confirmed by ARO (Sept. 24.27-28p3), Grasslands Obs. (Sept. 24.29p3), Farra d'Isonzo Obs. (Sept. 24.81-83p2), Remanzacco Obs. (Sept. 24.82-83p2), Spacewatch 1.8m (Sept. 25.12p3), Cordell-Lorenz Obs. (Sept. 25.13-14p2), Desert Moon Obs. (Sept. 25.18-20p3), MLS (Sept. 25.21-23p4), and Sandlot Obs. (Sept. 25.25-26p3).

MPEC 2008-S53 - "17:17 UT" - 2008 SQ7

K08S07Q 2008 SQ7 (H=19.4 ~446m) was discovered at 0944 UT on 23 Sept. by LINEAR, which observed it at Sept. 23.41-45p5 and 24.40-45p15. The discovery was confirmed by MLS (Sept. 24.48-51p8 & 25.38-40p4), Sabino Canyon Obs. (Sept. 25.40-42p3), and Mt. John Obs. (Sept. 25.63-64p4).

MPEC 2008-S52 - "17:13 UT" - 2008 SP7

K08S07P 2008 SP7 (Q=4.212 AU, H=19.0 ~537m) was discovered at 0927 UT on 23 Sept. by Goodricke-Pigott Obs., which observed it at Sept. 23.39-42p3. The discovery was confirmed by MLS (Sept. 25.38-40p4), Desert Moon Obs. (Sept. 25.49-50p3), and Mt. John Obs. (Sept. 25.59p3).

<< DOU on 25 Sept. '08 >> MPEC 2008-S51 - "06:08 UT" - Daily Orbit Update

Observations of risk-listed objects
K08S01U 2008 SU1 (arc=2 days, H=19.3 ~467m) from Kanab Obs. (Sept. 24.32p1 & 24.36p1) and Spacewatch 1.8m (Sept. 25.10-11p3)
K08S00T 2008 ST (small asteroid, arc=2 days, H=27.1 ~13m) from ARO (Sept. 24.08-09p3)
Observations of recently (no longer) risk-listed objects
K08S00O 2008 SO (arc=3 days, H=20.9 ~224m) from LINEAR (Sept. 24.30-34p4)
K08R01H 2008 RH1 (small asteroid, arc=19 days, H=22.6 ~102m) from ARO (Sept. 23.16-17p3)
K08Q03T 2008 QT3 (arc=30 days, H=18.4 ~708m) from ARO (Sept. 24.07p1)
K08Q00Y 2008 QY (arc=34 days, H=18.5 ~676m) from Spacewatch 1.8m (Sept. 24.35-36p2)
Observations of small asteroids (H>22.0)
K08S00S 2008 SS (arc=3 days, H=22.1 ~129m) from ARO (Sept. 24.17-18p3) and Mt. John Obs. (Sept. 24.42-43p3 & 24.50-51p4)
K08S00P 2008 SP (arc=3 days, H=23.2 ~78m) from ARO (Sept. 24.14-15p4)
K08S00A 2008 SA (arc=4 days, H=25.0 ~34m) from ARO (Sept. 24.08-09p7)
K08R24W 2008 RW24 (arc=15 days, H=22.9 ~89m) from Schiaparelli Obs. (Sept. 17.02p2)
K08R01E 2008 RE1 (arc=22 days, H=23.0 ~85m) from the Spacewatch 0.9m telescope (Sept. 24.30-33p3)
K08P01E 2008 PE1 (arc=54 days, H=24.1 ~51m) from ARO (Sept. 24.20-24p2 at V=22.8-9)
Observations of other objects
K08S01W 2008 SW1 (arc=1 day, H=21.7 ~155m) from LINEAR (Sept. 24.36-39p4)
K08S01R 2008 SR1 (arc=0 days, H=20.2 ~309m) from Schiaparelli Obs. (Sept. 23.91-92p5) and Malaga Obs. (Sept. 24.01-03p6)
K08S01Q 2008 SQ1 (Q=4.682 AU, arc=2 opp, H=18.1 ~812m) from Capannoli Obs. (Sept. 24.94-96p2)
K08S01N 2008 SN1 (arc=4 days, H=19.6 ~407m) from CSS (Sept. 24.26-29p4 & 24.34-35p3)
K08S00Q 2008 SQ (arc=3 days, H=19.4 ~446m) from ARO (Sept. 23.37-38p5) and LINEAR (Sept. 24.35-39p5)
K08S00E 2008 SE (arc=5 days, H=19.2 ~490m) from CSS (Sept. 24.26-29p4) and Capannoli Obs. (Sept. 24.92-93p2)
K08R26S 2008 RS26 (Q=4.792 AU, arc=22 days, H=17.8 ~933m) from Mt. John Obs. (Sept. 24.40-41p3)
K08R00T 2008 RT (arc=21 days, H=19.6 ~407m) from ARO (Sept. 22.36p3)
K08Q03U 2008 QU3 (arc=33 days, H=20.5 ~269m) from ARO (Sept. 24.10-11p3)
K08P03L 2008 PL3 (arc=49 days, H=19.4 ~446m) from Spacewatch 0.9m (Sept. 22.15-17p3)
K08N00U 2008 NU (Q=4.202 AU, arc=85 days, H=17.6 ~1.02 km) from CSS (Sept. 24.26-29p4)
K07T19A 2007 TA19 (arc=2 opp, H=19.5 ~426m) from Spacewatch 1.8m (Sept. 24.47-48p3)
K07A02T 2007 AT2 (arc=2 opp, H=19.6 ~407m) from ARO (Sept. 23.21-25p3 at V=22.2-3)
K06W01H 2006 WH1 (arc=3 opp, H=20.2 ~309m) from Spacewatch 1.8m (Sept. 24.25p3 at V=22.1-5)
K05V17Y 2005 VY17 (arc=3 opp, H=17.3 ~1.17 km) from Spacewatch 0.9m (Sept. 22.48-51p3)
K05V00C 2005 VC (arc=2 opp, H=17.2 ~1.23 km) from Spacewatch 1.8m (Sept. 24.25p3)
K05T51Z 2005 TZ51 (arc=3 opp, H=17.9 ~891m) from CSS (Sept. 24.13-15p4)
K05R34D 2005 RD34 (arc=2 opp, H=20.3 ~295m) from LINEAR (Sept. 24.16-21p5)
K05B00C 2005 BC (arc=2 opp, H=18.0 ~851m) from CSS (Sept. 24.10-12p3)
K04X44N 2004 XN44 (arc=2 opp, H=18.5 ~676m) from LINEAR (Sept. 24.23-28p5)
K04H12E 2004 HE12 (i=42.7°, arc=4 opp, H=17.5 ~1.07 km) from CSS (Sept. 24.16-18p4)
K03WF8D 2003 WD158 (arc=4 opp, H=18.9 ~562m) from Spacewatch 1.8m (Sept. 24.42-43p3)
K03G00W 2003 GW (i=49.4°, arc=3 opp, H=16.8 ~1.48 km) from El Guijo Obs. (Sept. 24.94p3)
K02V17V 2002 VV17 (arc=4 opp, H=19.9 ~355m) from Timberlake Obs. (Sept. 24.05-09p2)
K01S09K 2001 SK9 (q=0.378 AU, arc=4 opp, H=18.1 ~812m) from El Guijo Obs. (Sept. 24.90-92p3)
J98S70J 1998 SJ70 (arc=3 opp, H=18.4 ~708m) from Schiaparelli Obs. (Sept. 15.04p5)
J1094 191094 2002 EA3 from Spacewatch 0.9m (Sept. 23.12-16p3)
G2911 162911 2001 LL5 from Timberlake Obs. (Sept. 24.10-14p2)
G2900 162900 2001 HG31 from CSS (Sept. 24.40-42p4) and MLS (Sept. 24.41-51p12)
G2825 162825 2001 BO61 from MLS (Sept. 24.37-40p7)
F5140 155140 2005 UD from LINEAR (Sept. 24.35-40p5)
F4991 154991 2005 BX26 from Spacewatch 0.9m (Sept. 24.46-49p3)
E4901 144901 2004 WG1 from Schiaparelli Obs. (Sept. 15.10-11p2)
E1851 141851 2002 PM6 from CSS (Sept. 24.16-18p4)
D8847 138847 2000 VE62 from MLS (Sept. 24.25-27p4)
D7799 137799 1999 YB from CSS (Sept. 24.41-42p3)
A5140 105140 2000 NL10 from Schiaparelli Obs. (Sept. 15.02-03p3)
90075 90075 2002 VU94 from LINEAR (Sept. 24.37-40p3)
88188 88188 2000 XH44 from Spacewatch 0.9m (Sept. 22.23p1)
87684 87684 2000 SY2 from Schiaparelli Obs. (Sept. 15.08p3)
65996 65996 1998 MX5 from LINEAR (Sept. 23.32-36p4)
65733 65733 1993 PC from LINEAR (Sept. 24.23-27p5)
07888 7888 1993 UC from LINEAR (Sept. 24.22-27p5)
04257 4257 Ubasti (1987 QA) from Schiaparelli Obs. (Sept. 14.97-00p3)
04183 4183 Cuno (1959 LM) from MLS (Sept. 24.30-32p4)
01627 1627 Ivar (1929 SH) from Goodricke-Pigott Obs. (Sept. 23.43p1)
01620 1620 Geographos (1951 RA) from Schiaparelli Obs. (Sept. 17.07p2 & 17.13-14p2)
00887 887 Alinda (1918 DB) from the Siding Spring Survey (SSS) (Sept. 24.49-50p3)

MPEC 2008-S50 - "04:38 UT" - 2008 SQ1

K08S01Q 2008 SQ1 (Q=4.682 AU, H=18.1 ~812m) from LONEOS (2004 Feb. 13.30-36p4) and Spacewatch 0.9m (2004 Feb. 17.32p1 & 2004 Feb. 17.38-41p2)

Observers on 25 September '08

A total of 26 observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 16 in MPECs 2008-S51, 2008-S54, 2008-S55, 2008-S56, 2008-S57 & 2008-S59 -- 2008 SV7, 2008 ST7, 2008 ST, 2008 SS7, 2008 SS, 2008 SR7, 2008 SQ, 2008 SP, 2008 SA, 2008 RT, 2008 RH1, 2008 QY, 2008 QU3, 2008 QT3, 2008 PE1, 2007 AT2
`B09`	Capannoli Obs. in Italy, 2 in MPEC 2008-S51 -- 2008 SQ1, 2008 SE
`703`	Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2008-S51, 2008-S54 & 2008-S57 -- 2008 SV7, 2008 SR7, 2008 SN1, 2008 SE, 2008 NU, 2005 TZ51, 2005 BC, 2004 HE12, 162900, 141851, 137799
`850`	Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2008-S54 -- 2008 SR7
`448`	Desert Moon Obs. in New Mexico, 2 in MPECs 2008-S52 & 2008-S54 -- 2008 SR7, 2008 SP7
`J27`	El Guijo Obs. in Spain, 2 in MPEC 2008-S51 -- 2003 GW, 2001 SK9
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2008-S54 -- 2008 SR7
`E10`	Faulkes Telescope South in New South Wales, 1 in MPEC 2008-S61 -- 2008 RM98
`683`	Goodricke-Pigott Obs. in Arizona, 2 in MPECs 2008-S51 & 2008-S52 -- 2008 SP7, 1627
`651`	Grasslands Obs. in Arizona, 1 in MPEC 2008-S54 -- 2008 SR7
`J95`	Great Shefford Obs. in England, 1 in MPEC 2008-S60 -- 2008 SF8
`682`	Kanab Obs. in Utah, 1 in MPEC 2008-S51 -- 2008 SU1
`704`	LINEAR in New Mexico, 12 in MPECs 2008-S51, 2008-S53 & 2008-S58 -- 2008 SW7, 2008 SW1, 2008 SQ7, 2008 SQ, 2008 SO, 2005 RD34, 2004 XN44, 90075, 65996, 65733, 155140, 7888
`699`	LONEOS in Arizona, 1 in MPEC 2008-S50 -- 2008 SQ1
`J40`	Malaga Obs. in Spain, 1 in MPEC 2008-S51 -- 2008 SR1
`474`	Mt. John Obs. in New Zealand, 8 in MPECs 2008-S51, 2008-S52, 2008-S53, 2008-S55, 2008-S56, 2008-S60 & 2008-S61 -- 2008 ST7, 2008 SS7, 2008 SS, 2008 SQ7, 2008 SP7, 2008 SF8, 2008 RS26, 2008 RM98
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2008-S51, 2008-S52, 2008-S53, 2008-S54, 2008-S55, 2008-S56, 2008-S57, 2008-S60 & 2008-S61 -- 2008 SV7, 2008 ST7, 2008 SS7, 2008 SR7, 2008 SQ7, 2008 SP7, 2008 SF8, 2008 RM98, 162900, 162825, 138847, 4183
`261&`	Rob Matson in southern California using the Palomar Digitized Sky Survey in southern California, 1 in MPEC 2008-S59 -- 2008 QY
`473`	Remanzacco Obs. in Italy, 1 in MPEC 2008-S54 -- 2008 SR7
`854`	Sabino Canyon Obs. in Arizona, 1 in MPEC 2008-S53 -- 2008 SQ7
`H36`	Sandlot Obs. in Kansas, 2 in MPECs 2008-S54 & 2008-S55 -- 2008 SS7, 2008 SR7
`204`	Schiaparelli Obs. in Italy, 8 in MPEC 2008-S51 -- 2008 SR1, 2008 RW24, 1998 SJ70, 87684, 144901, 105140, 4257, 1620
`E12`	Siding Spring Survey in New South Wales, 1 in MPEC 2008-S51 -- 887
`691`	Spacewatch 0.9m telescope in Arizona, 7 in MPECs 2008-S50 & 2008-S51 -- 2008 SQ1, 2008 RE1, 2008 PL3, 2005 VY17, 88188, 191094, 154991
`291`	Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2008-S51, 2008-S54, 2008-S55, 2008-S56 & 2008-S59 -- 2008 SU1, 2008 ST7, 2008 SS7, 2008 SR7, 2008 QY, 2007 TA19, 2006 WH1, 2005 VC, 2003 WD158
`H83`	Timberlake Obs. in Virginia, 2 in MPEC 2008-S51 -- 2002 VV17, 162911

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

Impact Risk Monitoring on 25 September '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2358 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 ST7	JPL Sentry	2025	2030-2108	156	7.5e-05	-3.96	-4.72	0	JPL: "Analysis based on 29 observations spanning 1.2281 days (2008-Sep-24.29993 to 2008-Sep-25.52801)." Diameter approximately 0.054 km. from mean, weighted H=24.0.

2008 SU1	JPL Sentry	1514	R E M O V E D						JPL: Risk listing removed at 0852 UTC.
2008 SU1	NEODyS	1514	R E M O V E D						-

2008 ST	JPL Sentry	1514	2043-2107	33	5.3e-05	-5.64	-6.28	0	JPL: "Analysis based on 27 observations spanning 1.9262 days (2008-Sep-22.16113 to 2008-Sep-24.08737)." Diameter approximately 0.013 km. from mean, weighted H=27.1.
2008 ST	NEODyS	1514	2052-2080	10	2.66e-05	-5.87	-6.30	0	NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2008/09/22.162 to 2008/09/24.088."

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 25 September '08

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

2358	Grabbed MPEC 2008-S61 - 2008 RM98 - see above
2133	Grabbed MPEC 2008-S60 - 2008 SF8 - see above
2045	Grabbed MPEC 2008-S59 - 2008 QY - see above
2025	Noted that JPL Sentry has posted 2008 ST7 as an impact risk - see above
1957	Grabbed MPEC 2008-S58 - 2008 SW7 - see above
1928	Grabbed MPEC 2008-S57 - 2008 SV7 - see above
1746	Grabbed MPEC 2008-S53 - 2008 SQ7 - see above Grabbed MPEC 2008-S54 - 2008 SR7 - see above Grabbed MPEC 2008-S55 - 2008 SS7 - see above Grabbed MPEC 2008-S56 - 2008 ST7 - see above
1745	Grabbed MPEC 2008-S52 - 2008 SP7 - see above
1514	Noted that JPL Sentry has updated its 2008 ST risk assessment - see above Noted that NEODyS has updated its 2008 ST risk assessment - see above Noted that JPL Sentry has removed 2008 SU1 as an impact risk - see above Noted that NEODyS has removed 2008 SU1 as an impact risk - see above Grabbed MPEC 2008-S51 - Daily Orbit Update - see above
0541	Grabbed MPEC 2008-S50 - 2008 SQ1 - see above

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