2008-09-26 Tracking News

Contents on 26 September '08

IAU Minor Planet Center
- NEOCP Activity -- five listings: 1 new, 4 updated
- New MPECs -- seven MPECs
Observers -- 28 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 26 September '08

The MPC's NEO Confirmation Page has 5 listings: 1 new, 4 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and four updated listings. Of these, four were "one nighters." So far The Tracking News has counted a total of nine 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 26 September '08

Minor Planet Electronic Circulars

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

MPEC 2008-S62 time-stamped "03:50 UT" - 2007 TQ436, 2007 TR436 - see below
MPEC 2008-S63 time-stamped "06:08 UT" - Daily Orbit Update - see below
MPEC 2008-S64 time-stamped "15:27 UT" - 2008 SX7 - see below
MPEC 2008-S65 time-stamped "17:16 UT" - 2008 SV11 - see below
MPEC 2008-S66 time-stamped "17:26 UT" - 2008 SW11 - see below
MPEC 2008-S67 time-stamped "19:49 UT" - Comets C/2008 N6, 2008 N7, 2008 O4, 2008 R7 (SOHO) - see below
MPEC 2008-S68 time-stamped "22:21 UT" - Comets C/2008 N8, 2008 N9, 2008 N10, 2008 N11, 2008 O5 (SOHO)

MPEC 2008-S68 - "22:21 UT" - Comets C/2008 N8, 2008 N9, 2008 N10, 2008 N11, 2008 O5 (SOHO)

CK08O050 C/2008 O5 from the LASCO Coronagraph 3 aboard the Solar & Heliospheric Obs. (SOHO) (July 17.20-53p32, 17.57-68p12, 17.74-93p18, 17.97-03p8 & 18.07p2) and the LASCO Coronagraph 2 aboard the Solar & Heliospheric Obs. (SOHO) (July 18.13-16p6)
CK08N110 C/2008 N11 from SOHO C3 (July 12.51-70p18, 12.78p2 & 12.82-86p6)
CK08N100 C/2008 N10 from SOHO C2 (July 10.58-69p18)
CK08N090 C/2008 N9 from SOHO C3 (July 8.32-61p30)
CK08N080 C/2008 N8 from SOHO C3 (July 7.65-74p10, 7.78-93p14, 7.97-03p8, 8.07-51p38, 8.55-61p8, 8.65-70p6 & 8.74-93p20) and SOHO C2 (July 8.98-06p12)

MPEC 2008-S67 - "19:49 UT" - Comets C/2008 N6, 2008 N7, 2008 O4, 2008 R7 (SOHO)

CK08R070 C/2008 R7 from SOHO C3 (Sept. 6.45-47p4, 6.53p2, 6.61-64p4, 6.70p2 & 6.78-82p4), the COR2-A instrument (5) aboard STEREO-A (Sept. 6.53-96p44), and SOHO C2 (Sept. 6.79-85p12, 6.90-19p34, 7.23-41p24, 7.46-54p10 & 7.59p2)
CK08O040 C/2008 O4 from SOHO C2 (July 25.42-54p16)
CK08N070 C/2008 N7 from SOHO C2 (July 6.10p2 & 6.15-19p8)
CK08N060 C/2008 N6 from SOHO C3 (July 5.24-28p4, 5.36p2, 5.43-47p4, 5.51p2, 5.57-61p4, 5.65p2, 5.70p2, 5.74-78p4, 5.82-86p4 & 5.90p2) and SOHO C2 (July 6.02-04p4)

MPEC 2008-S66 - "17:26 UT" - 2008 SW11

K08S11W 2008 SW11 (H=21.1 ~204m) was discovered at 0830 UT on 25 Sept. by the Spacewatch 0.9m telescope, which observed it at Sept. 25.35-39p3. The discovery was confirmed by Mt. John Obs. (Sept. 25.55-56p4), Great Shefford Obs. (Sept. 26.06-07p2), Astronomical Research Obs. (ARO) (Sept. 26.26-27p3), the Spacewatch 1.8m telescope (Sept. 26.27p3 & 26.41-42p3), and Powell Obs. (Sept. 26.35-37p4).

MPEC 2008-S65 - "17:16 UT" - 2008 SV11

K08S11V 2008 SV11 (risk-listed, Earth MOID=8.2 LD, H=18.3 ~741m) was discovered at 0617 UT on 25 Sept. by the Mt. Lemmon Survey (MLS), which observed it at Sept. 25.26-29p4 and 25.33-40p7. The discovery was confirmed by Mt. John Obs. (Sept. 25.48-49p4), Faulkes Telescope South (Sept. 25.63-64p4), ARO (Sept. 26.13-15p3), and Spacewatch 1.8m (Sept. 26.25-26p3).

MPEC 2008-S64 - "15:27 UT" - 2008 SX7

K08S07X 2008 SX7 (H=18.3 ~741m) was discovered at 1110 UT on 21 Sept. by the Siding Spring Survey (SSS), which observed it at Sept. 21.47-50p4, 25.46-48p3, 25.59p2, 26.38p1, and 26.53p2.

<< DOU on 26 Sept. '08 >> MPEC 2008-S63 - "06:08 UT" - Daily Orbit Update

Observations of recently (no longer) risk-listed objects
K08S01U 2008 SU1 (arc=2 days, H=19.2 ~490m) from ARO (Sept. 25.13-15p3)
K08S00R 2008 SR (almost small, arc=3 days, H=21.8 ~148m) from ARO (Sept. 24.34-35p3)
K08R01J 2008 RJ1 (arc=21 days, H=17.7 ~977m) from ARO (Sept. 25.17-19p3)
K08R01H 2008 RH1 (small asteroid, arc=21 days, H=22.6 ~102m) from ARO (Sept. 25.17-19p4)
K08Q11S 2008 QS11 (arc=29 days, H=19.9 ~355m) from Oakley Southern Sky Obs. (OSSO) (Sept. 10.42-51p5, 11.58-63p4 & 12.43-47p5), CEAMIG-REA (Sept. 25.20-21p10), Faulkes South (Sept. 25.63p4), and SSS (Sept. 25.72p2)
Observations of small asteroids (H>22.0)
K08S01Z 2008 SZ1 (arc=2 days, H=24.6 ~41m) from LINEAR (Sept. 24.29-34p5) and ARO (Sept. 25.24-25p3)
K08S00S 2008 SS (arc=4 days, H=22.1 ~129m) from ARO (Sept. 25.16-17p4) and SSS (Sept. 25.60-61p2)
K08S00P 2008 SP (arc=4 days, H=23.2 ~78m) from ARO (Sept. 25.11-12p4)
K08S00A 2008 SA (arc=4 days, H=25.0 ~34m) from North Obs. (Sept. 21.82-92p12) and Verona Obs. (Sept. 22.84p4)
Observations of almost-small asteroids (21.7<H<=22.0)
K08S01W 2008 SW1 (arc=2 days, H=21.8 ~148m) from ARO (Sept. 25.26-27p3)
Observations of other objects
K08S07P 2008 SP7 (Q=4.263 AU, arc=2 days, H=19.0 ~537m) from Kanab Obs. (Sept. 25.45p1 & 25.50p1)
K08S01R 2008 SR1 (arc=2 days, H=20.3 ~295m) from ARO (Sept. 25.11-12p4), Petit Jean Mtn. South Obs. (PJMSO) (Sept. 25.29-30p9), SSS (Sept. 25.45p2 & 25.72p2), and Balzaretto Obs. (Sept. 25.86-88p5)
K08S01Q 2008 SQ1 (Q=4.682 AU, arc=2 opp, H=18.2 ~776m) from PJMSO (Sept. 25.30-31p6)
K08S01N 2008 SN1 (Q=4.027 AU, arc=5 days, H=19.6 ~407m) from ARO (Sept. 25.22-23p4)
K08S00Q 2008 SQ (arc=3 days, H=19.4 ~446m) from ARO (Sept. 24.33-34p5)
K08S00E 2008 SE (arc=5 days, H=19.2 ~490m) from PJMSO (Sept. 25.32-33p6)
K08S00D 2008 SD (arc=6 days, H=19.4 ~446m) from SSS (Sept. 25.71p2)
K08S00C 2008 SC (q=0.325 AU, arc=5 days, H=21.7 ~155m) from SSS (Sept. 24.40p2)
K08R98G 2008 RG98 (arc=16 days, H=17.2 ~1.23 km) from Desert Moon Obs. (Sept. 25.35-38p3)
K08R80E 2008 RE80 (arc=14 days, H=18.1 ~812m) from ARO (Sept. 25.15-17p4)
K08R24X 2008 RX24 (arc=19 days, H=21.3 ~186m) from ARO (Sept. 25.13-15p3)
K08Q03U 2008 QU3 (arc=34 days, H=20.5 ~269m) from ARO (Sept. 25.06-07p3)
K08Q01D 2008 QD1 (arc=33 days, H=18.9 ~562m) from ARO (Sept. 25.25-26p3) and Desert Moon Obs. (Sept. 25.40-41p5)
K08O09B 2008 OB9 (Q=5.652 AU, arc=56 days, H=17.4 ~1.12 km) from ARO (Sept. 18.06-07p3)
K08O00N 2008 ON (arc=60 days, H=20.3 ~295m) from ARO (Sept. 24.13-14p3)
K08M01U 2008 MU1 (i=40.8°, arc=72 days, H=19.7 ~389m) from Verona Obs. (July 24.90p3)
K08M01H 2008 MH1 (Q=4.263 AU, arc=88 days, H=18.5 ~676m) from ARO (Sept. 24.07-08p4)
K08J07Z 2008 JZ7 (Q=4.382 AU, arc=142 days, H=18.6 ~645m) from ARO (Sept. 24.19-20p4)
K05V00C 2005 VC (arc=2 opp, H=17.2 ~1.23 km) from Spacewatch 1.8m (Sept. 25.22-23p3)
K05T51Z 2005 TZ51 (arc=3 opp, H=17.9 ~891m) from Vicksburg Obs. (Sept. 25.15-17p3)
K05T15R 2005 TR15 (arc=2 opp, H=18.6 ~645m) from Spacewatch 0.9m (Sept. 23.24-27p3)
K05R34C 2005 RC34 (arc=2 opp, H=19.7 ~389m) from Verona Obs. (July 18.94p3)
K03G00W 2003 GW (i=49.4°, arc=3 opp, H=16.8 ~1.48 km) from Green Island Obs. (Sept. 24.72-76p4)
K02X40P 2002 XP40 (arc=4 opp, H=19.9 ~355m) from ARO (Sept. 25.20-24p3 at V=22.0-22.1)
K02S41S 2002 SS41 (i=63.7°, arc=3 opp, H=17.2 ~1.23 km) from PJMSO (Sept. 25.31-32p5)
J98W06Z 1998 WZ6 (arc=5 opp, H=17.3 ~1.17 km) from SSS (Sept. 25.66-70p4)
J98S70J 1998 SJ70 (arc=3 opp, H=18.4 ~708m) from PJMSO (Sept. 25.34-35p5)
I5851 185851 2000 DP107 from Taurus-1 Obs. (Sept. 25.07-12p42) and Mt. Tuffley Obs. (Sept. 25.93-94p3)
G4400 164400 2005 GN59 from Balzaretto Obs. (Sept. 25.81-83p4) and Mt. Tuffley Obs. (Sept. 25.91p3)
D8947 138947 2001 BA40 from Desert Moon Obs. (Sept. 25.15-16p3)
A8906 108906 2001 PL9 from MLS (Sept. 25.24-25p4)
65733 65733 1993 PC from MLS (Sept. 25.21-23p4)
39572 39572 1993 DQ1 from Vicksburg Obs. (Sept. 25.11-12p3)
16960 16960 1998 QS52 from Mt. Tuffley Obs. (Sept. 25.92-93p3)
08567 8567 1996 HW1 from Taurus-1 Obs. (Sept. 24.87-95p63), Vitebsk Obs. (Sept. 25.01p6), and Mt. Tuffley Obs. (Sept. 25.92p3)
01627 1627 Ivar (1929 SH) from Goodricke-Pigott Obs. (Sept. 24.43-44p2) and Mt. Tuffley Obs. (Sept. 25.99-00p3)
01620 1620 Geographos (1951 RA) from Taurus-1 Obs. (Sept. 25.87-88p4)

MPEC 2008-S62 - "03:50 UT" - 2007 TQ436, 2007 TR436

K07Th6R 2007 TR436 was discovered at 0653 UT on 14 Oct. 2007 from Mauna Kea, where it was observed at 2007 Oct. 14.29p1 at R=24.3, 2007 Oct. 14.35p1 at R=24.3, and 2007 Oct. 14.41p1. The discovery was confirmed by Cerro Tololo Inter-American Obs. (CTIO) (2007 Nov. 14.10p1 & 2007 Nov. 14.16p1).
K07Th6Q 2007 TQ436 was discovered at 0645 UT on 14 Oct. 2007 from Mauna Kea, where it was observed at 2007 Oct. 14.28p1 at R=25.5, 2007 Oct. 14.34p1, and 2007 Oct. 14.41p1. The discovery was confirmed by CTIO (2007 Nov. 14.09p1, 2007 Nov. 14.14p1 & 2007 Dec. 7.06-09p2).

Observers on 26 September '08

A total of 28 observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 22 in MPECs 2008-S63, 2008-S65 & 2008-S66 -- 2008 SZ1, 2008 SW11, 2008 SW1, 2008 SV11, 2008 SU1, 2008 SS, 2008 SR1, 2008 SR, 2008 SQ, 2008 SP, 2008 SN1, 2008 RX24, 2008 RJ1, 2008 RH1, 2008 RE80, 2008 QU3, 2008 QD1, 2008 ON, 2008 OB9, 2008 MH1, 2008 JZ7, 2002 XP40
`A81`	Balzaretto Obs. in Italy, 2 in MPEC 2008-S63 -- 2008 SR1, 164400
`I77`	CEAMIG-REA in Brazil, 1 in MPEC 2008-S63 -- 2008 QS11
`807`	Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPEC 2008-S62 -- 2007 TR436, 2007 TQ436
`448`	Desert Moon Obs. in New Mexico, 3 in MPEC 2008-S63 -- 2008 RG98, 2008 QD1, 138947
`E10`	Faulkes Telescope South in New South Wales, 2 in MPECs 2008-S63 & 2008-S65 -- 2008 SV11, 2008 QS11
`683`	Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-S63 -- 1627
`J95`	Great Shefford Obs. in England, 1 in MPEC 2008-S66 -- 2008 SW11
`B34`	Green Island Obs. in Cyprus, 1 in MPEC 2008-S63 -- 2003 GW
`682`	Kanab Obs. in Utah, 1 in MPEC 2008-S63 -- 2008 SP7
`704`	LINEAR in New Mexico, 1 in MPEC 2008-S63 -- 2008 SZ1
`568`	Mauna Kea in Hawaii, 2 in MPEC 2008-S62 -- 2007 TR436, 2007 TQ436
`474`	Mt. John Obs. in New Zealand, 2 in MPECs 2008-S65 & 2008-S66 -- 2008 SW11, 2008 SV11
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2008-S63 & 2008-S65 -- 2008 SV11, 65733, 108906
`J93`	Mt. Tuffley Obs. in England, 5 in MPEC 2008-S63 -- 185851, 16960, 164400, 8567, 1627
`J69`	North Obs. in England, 1 in MPEC 2008-S63 -- 2008 SA
`E09`	Oakley Southern Sky Obs. in New South Wales, 1 in MPEC 2008-S63 -- 2008 QS11
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2008-S63 -- 2008 SR1, 2008 SQ1, 2008 SE, 2002 SS41, 1998 SJ70
`649`	Powell Obs. in Kansas, 1 in MPEC 2008-S66 -- 2008 SW11
`C495`	COR2-A instrument (5) aboard STEREO-A in heliocentric orbit leading Earth, 1 in MPEC 2008-S67 -- C/2008 R7
`E12`	Siding Spring Survey (SSS) in New South Wales, 7 in MPECs 2008-S63 & 2008-S64 -- 2008 SX7, 2008 SS, 2008 SR1, 2008 SD, 2008 SC, 2008 QS11, 1998 WZ6
`2492`	LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 7 in MPECs 2008-S67 & 2008-S68 -- C/2008 R7, C/2008 O5, C/2008 O4, C/2008 N8, C/2008 N7, C/2008 N6, C/2008 N10
`2493`	LASCO Coronagraph 3 (SOHO C3) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 6 in MPECs 2008-S67 & 2008-S68 -- C/2008 R7, C/2008 O5, C/2008 N9, C/2008 N8, C/2008 N6, C/2008 N11
`691`	Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2008-S63 & 2008-S66 -- 2008 SW11, 2005 TR15
`291`	Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2008-S63, 2008-S65 & 2008-S66 -- 2008 SW11, 2008 SV11, 2005 VC
`A98`	Taurus-1 Obs. in Belarus, 3 in MPEC 2008-S63 -- 185851, 8567, 1620
`A48`	Verona Obs. in Italy, 3 in MPEC 2008-S63 -- 2008 SA, 2008 MU1, 2005 RC34
`H47`	Vicksburg Obs. in Mississippi, 2 in MPEC 2008-S63 -- 2005 TZ51, 39572
`B42`	Vitebsk Obs. in Belarus, 1 in MPEC 2008-S63 -- 8567

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

Impact Risk Monitoring on 26 September '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2359 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 SV11	JPL Sentry	2101	2014-2108	513	5.9e-07	-2.71	-3.87	0	JPL: "Analysis based on 25 observations spanning .99767 days (2008-Sep-25.26245 to 2008-Sep-26.26012)." Diameter approximately 0.729 km. from mean, weighted H=18.3.

2008 ST7	NEODyS	1458	2050-2090	31	1.42e-05	-4.63	-5.31	0	NEODyS: "Based on 32 optical observations (of which 6 are rejected as outliers) from 2008/09/24.301 to 2008/09/25.529."

2008 RM98	NEODyS	1458	2085	1	7.62e-08	-5.12	-5.12	0	NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2008/09/07.322 to 2008/09/25.645."
2008 RM98	JPL Sentry	0123	2085-2103	3	3.9e-09	-6.22	-6.26	0	JPL: "Analysis based on 26 observations spanning 18.323 days (2008-Sep-07.32138 to 2008-Sep-25.64404)." Diameter approximately 0.362 km. from mean, weighted H=19.9.

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 26 September '08

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

2302	Grabbed MPEC 2008-S68 - Comets C/2008 N8, 2008 N9, 2008 N10, 2008 N11, 2008 O5 (SOHO) - see above
2101	Noted that JPL Sentry has posted 2008 SV11 as an impact risk - see above Grabbed MPEC 2008-S67 - Comets C/2008 N6, 2008 N7, 2008 O4, 2008 R7 (SOHO) - see above
1933	Grabbed MPEC 2008-S65 - 2008 SV11 - see above Grabbed MPEC 2008-S66 - 2008 SW11 - see above
1631	Grabbed MPEC 2008-S64 - 2008 SX7 - see above
1458	Grabbed MPEC 2008-S63 - Daily Orbit Update - see above
1457	Noted that NEODyS has posted 2008 RM98 as an impact risk - see above Noted that NEODyS has posted 2008 ST7 as an impact risk - see above
0359	Grabbed MPEC 2008-S62 - 2007 TQ436, 2007 TR436 - see above
0123	Noted that JPL Sentry has posted 2008 RM98 as an impact risk - see above

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