2008-09-22 Tracking News

Contents on 22 September '08

Radar Astrometry -- two objects
IAU Minor Planet Center
- NEOCP Activity -- three listings: 1 new, 2 updated
- New MPECs -- sixteen MPECs
Observers -- 59 observing facilities
Impact Risk Monitoring -- four 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.

Radar Astrometry on 22 September '08

Radar observation of two objects

The JPL Solar System Dynamics Group Radar Astrometry database has added the following small-body radar observing work:

Data addition noted at 1937 UTC when the database was dated 22 Sept.

185851 2000 DP107 from Goldstone DSS-14 70m antenna (Sept. 9.44 velocity, 9.47 range & 9.49 range) - see links

Data addition noted at 2314 UTC when the database was dated 22 Sept.

137032 1998 UO1 from Arecibo (Sept. 20.60 range & 21.66 range) - see links

NEOCP Activity on 22 September '08

The MPC's NEO Confirmation Page has 3 listings: 1 new, 2 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and two updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of thirteen objects listed on the NEOCP at some point today.

New MPECs on 22 September '08

Minor Planet Electronic Circulars

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

MPEC 2008-S20 time-stamped "06:06 UT" - Daily Orbit Update - see below
MPEC 2008-S21 time-stamped "15:13 UT" - Comet C/2008 P1 (Garradd) - see below
MPEC 2008-S22 time-stamped "16:01 UT" - Comet C/2008 Q1 (Maticic) - see below
MPEC 2008-S23 time-stamped "16:26 UT" - Comet P/2008 Q2 (Ory) - see below
MPEC 2008-S24 time-stamped "16:35 UT" - Comet C/2008 Q3 (Garradd) - see below
MPEC 2008-S25 time-stamped "16:41 UT" - Comet C/2008 R3 (LINEAR) - see below
MPEC 2008-S26 time-stamped "16:59 UT" - Comet P/2008 S1 = 2008 JK (Catalina-McNaught) - see below
MPEC 2008-S27 time-stamped "17:14 UT" - Observations of Comets - see below
MPEC 2008-S28 time-stamped "17:44 UT" - 2008 SO - see below
MPEC 2008-S29 time-stamped "17:47 UT" - 2008 SP - see below
MPEC 2008-S30 time-stamped "17:49 UT" - 2008 SQ - see below
MPEC 2008-S31 time-stamped "17:52 UT" - 2008 SR - see below
MPEC 2008-S32 time-stamped "17:55 UT" - 2008 SS - see below
MPEC 2008-S33 time-stamped "17:59 UT" - 2008 ST - see below
MPEC 2008-S34 time-stamped "18:03 UT" - 2008 SU - see below
MPEC 2008-S35 time-stamped "18:07 UT" - 2007 MM13

MPEC 2008-S35 - "18:07 UT" - 2007 MM13

K07M13M 2007 MM13 (i=38.2°, H=17.7 ~977m) from Astronomical Research Obs. (ARO) (Sept. 18.37-38p2 & 22.41-42p2)

MPEC 2008-S34 - "18:03 UT" - 2008 SU

K08S00U 2008 SU (Q=4.683 AU, H=20.2 ~309m) was discovered at 0623 UT on 22 Sept. by the Spacewatch 1.8m telescope, which observed it at Sept. 20.35-36p3, 21.30-31p3, and 22.27p3. The discovery was confirmed by the Spacewatch 0.9m telescope (Sept. 20.25-29p3) and ARO (Sept. 22.31-33p3).

MPEC 2008-S33 - "17:59 UT" - 2008 ST

K08S00T 2008 ST (risk-listed, Earth MOID=0.9 LD, H=27.1 ~13m) was discovered at 0352 UT on 22 Sept. by the Mt. Lemmon Survey (MLS), which observed it at Sept. 22.16-21p7, 22.29p4, and 22.38-39p4. The discovery was confirmed by Sabino Canyon Obs. (Sept. 22.22-23p3) and ARO (Sept. 22.22p3). This object is now within ten lunar distances (LD) of Earth, reaching 4.0 LD on 28 Sept.

MPEC 2008-S32 - "17:55 UT" - 2008 SS

K08S00S 2008 SS (small asteroid, H=22.2 ~123m) was discovered at 1321 UT on 21 Sept. by the Siding Spring Survey (SSS), which observed it at Sept. 21.56-58p4, 21.64-65p2, and 21.74p1. The discovery was confirmed by Great Shefford Obs. (Sept. 21.93-94p2), Nazaret Obs. (Sept. 21.00-02p3), ARO (Sept. 22.19-20p4), Desert Moon Obs. (Sept. 22.22-25p5), and Sabino Canyon Obs. (Sept. 22.24-25p3).

MPEC 2008-S31 - "17:52 UT" - 2008 SR

K08S00R 2008 SR (risk-listed, H=21.6 ~162m) was discovered at 1022 UT on 21 Sept. by MLS, which observed it at Sept. 21.43-51p8 and 22.30-33p4. The discovery was confirmed by ARO (Sept. 22.28-30p3) and Spacewatch 1.8m (Sept. 22.30p3).

MPEC 2008-S30 - "17:49 UT" - 2008 SQ

K08S00Q 2008 SQ (H=19.5 ~426m) was discovered at 0842 UT on 21 Sept. by MLS, which observed it at Sept. 21.36-45p8. The discovery was confirmed by Tiki Obs. (Sept. 21.57-59p2), Eschenberg Obs. (Sept. 21.84-85p3), Remanzacco Obs. (Sept. 21.91-92p2), Naef Obs. (Sept. 21.93-94p2), Great Shefford Obs. (Sept. 21.96p3), Sabino Canyon Obs. (Sept. 22.29-30p3), ARO (Sept. 22.31p3), Cordell-Lorenz Obs. (Sept. 22.37-44p5), and Moriyama Obs. (Sept. 22.61-62p3).

MPEC 2008-S29 - "17:47 UT" - 2008 SP

K08S00P 2008 SP (small asteroid, H=23.4 ~71m) was discovered at 0627 UT on 21 Sept. by MLS, which observed it at Sept. 21.27-35p8 and 22.12-15p4. The discovery was confirmed by Great Shefford Obs. (Sept. 21.87-88p2).

MPEC 2008-S28 - "17:44 UT" - 2008 SO

K08S00O 2008 SO (risk-listed, H=20.9 ~224m) was discovered at 0544 UT on 21 Sept. by Spacewatch 0.9m, which observed it at Sept. 21.24-27p3. The discovery was confirmed by Spacewatch 1.8m (Sept. 21.32-33p3, 21.40-41p3 & 22.23-24p3), Cordell-Lorenz Obs. (Sept. 22.26-30p2), ARO (Sept. 22.26-27p3), and Sabino Canyon Obs. (Sept. 22.27-28p3).

MPEC 2008-S27 - "17:14 UT" - Observations of Comets

PK08O020 P/2008 O2 (McNaught) from Kiev Comet Station (Sept. 8.83p3), Nazaret Obs. (Sept. 16.88-90p4), Kambah Obs. (Sept. 17.57-58p2), and MLS (Sept. 22.18-20p4)
CK08N010 C/2008 N1 (Holmes) from Table Mtn. Obs. (Sept. 16.23-25p4), Atlante Obs. (Sept. 20.88-89p3), and the Catalina Sky Survey (CSS) (Sept. 22.30-33p4)
PK08L020 P/2008 L2 (Hill) from Moletai Obs. (Aug. 23.03-04p5) and Paus Obs. (Sept. 15.93p1)
PK08J030 P/2008 J3 (McNaught) from North Ryde Obs. (Sept. 9.40p1, 9.45p1, 19.45-49p2, 20.51-55p2 & 21.45-48p2) and Kambah Obs. (Sept. 17.62-63p2)
CK08J010 C/2008 J1 (Boattini) from Siegen Obs. (Sept. 13.92-93p3), Carmelita Obs. (Sept. 15.81-82p3 & 17.84-85p3), Monte Deva Obs. (Sept. 15.97p5 & 17.99-00p5), Aravaca Obs. (Sept. 16.87-88p2), and Malaga Obs. (Sept. 18.00-04p3 & 21.88-90p3)
CK08A010 C/2008 A1 (McNaught) from Beta Orionis Obs. (Sept. 16.95p3) and Cristo Rey Obs. (Sept. 16.97p5 & 21.97-98p4)
CK07W010 C/2007 W1 (Boattini) from Moletai Obs. (Aug. 12.97-99p5), Siegen Obs. (Sept. 13.99-00p3), Nazaret Obs. (Sept. 21.03p4 & 21.97-98p3), and Malaga Obs. (Sept. 21.94p1)
CK07N030 C/2007 N3 (Lulin) from Smolyan Obs. (June 27.99-03p13), Kiev Comet Station (Sept. 1.82p2), Siegen Obs. (Sept. 13.82-83p2), Carmelita Obs. (Sept. 15.79-80p3 & 17.79p3), Aravaca Obs. (Sept. 15.80-82p4 & 19.79-80p2), Grove Creek Obs. (Sept. 16.50p1 & 16.56p1), Atlante Obs. (Sept. 16.85-86p3), Nazaret Obs. (Sept. 16.86-87p4, 17.85-88p4 & 21.86-87p4), Vicksburg Obs. (Sept. 17.05-07p3 & 18.04-06p3), and SSS (Sept. 17.43-45p4)
CK06W030 C/2006 W3 (Christensen) from Smolyan Obs. (June 24.89-91p7), Siegen Obs. (Sept. 13.94-95p3), Monte Deva Obs. (Sept. 15.98-99p5 & 17.97-98p5), Atlante Obs. (Sept. 16.95p3), Aravaca Obs. (Sept. 17.82-83p2 & 19.80-83p4), Carmelita Obs. (Sept. 17.86p3), CAST Obs. (Sept. 19.78p1), and Malaga Obs. (Sept. 20.90p3 & 21.84-86p4)
CK06V010 C/2006 V1 (Catalina) from SSS (Aug. 26.46p2 & Sept. 19.48p1) and Kambah Obs. (Sept. 17.55-56p2)
CK06O02F C/2006 OF2 (Broughton) from Smolyan Obs. (June 28.03-05p10), Siegen Obs. (Sept. 14.02-04p3), Monte Deva Obs. (Sept. 16.05-06p5 & 17.96-97p5), Mt. Tuffley Obs. (Sept. 19.98p3 & 21.01p3), Nazaret Obs. (Sept. 21.09-11p4), Montana Cabreja Obs. (Sept. 21.11-12p2), and Atlante Obs. (Sept. 21.16p3)
CK05S040 C/2005 S4 (McNaught) from Alginet Obs. (Sept. 2.87p1 & 15.84-85p2) and Ametlla del Valles Obs. (Sept. 15.82p2 & 15.88p1)
CK05L030 C/2005 L3 (McNaught) from Smolyan Obs. (June 24.85-87p8 & 26.91p1), Ametlla del Valles Obs. (Sept. 15.80-81p4 & 17.78-84p6), and La Vara Obs. (Sept. 20.85p3)
0205P 205P/Giacobini from Vega del Thader Obs. (Sept. 14.84-85p5), Paus Obs. (Sept. 15.82-83p3), Carmelita Obs. (Sept. 15.84p3), Monte Deva Obs. (Sept. 15.95p4 & 17.92-93p5), Table Mtn. Obs. (Sept. 16.18-20p4 & 17.25-27p4), Hamamatsu-Yuto Obs. (Sept. 16.47-48p3), Grove Creek Obs. (Sept. 16.49p1, 16.55p1, 17.55p1 & 17.60p1), Yatsuka Obs. (Sept. 16.52p3), Konan Obs. (Sept. 16.59-62p3), Aravaca Obs. (Sept. 16.86p2), Atlante Obs. (Sept. 16.93p3 & 20.86p3), Nazaret Obs. (Sept. 16.98-99p4, 17.91p4, 20.90-91p4 & 21.94-96p4), Cordell-Lorenz Obs. (Sept. 17.08-12p3 & 19.06-10p3), Vicksburg Obs. (Sept. 17.15-18p4 & 18.18-19p3), Petit Jean Mtn. South Obs. (PJMSO) (Sept. 17.22-23p6), Montcabre Obs. (Sept. 17.84p3), Malaga Obs. (Sept. 17.93-95p3), CAST Obs. (Sept. 19.78p1), Vesqueville Obs. (Sept. 19.83-88p8), Linceo Obs. (Sept. 19.88-90p3 & 20.88-90p3), La Vara Obs. (Sept. 20.87p3), and Montana Cabreja Obs. (Sept. 21.04-06p2)
0199P 199P/Shoemaker 4 from Nazaret Obs. (Sept. 16.84-86p4, 17.83-84p4, 20.83-84p4 & 21.84-85p4), Ametlla del Valles Obs. (Sept. 17.83p3), and SSS (Sept. 21.39p1)
0068P 68P/Klemola from SSS (Sept. 18.42p1) and Chante-Perdrix Obs. (Sept. 19.78-79p3)
0067P 67P/Churyumov-Gerasimenko from Lumezzane Obs. (Sept. 8.90p4), Grove Creek Obs. (Sept. 16.52p1, 16.57p1 & 17.58p1), Nazaret Obs. (Sept. 16.95-97p4), and SSS (Sept. 20.51p1)
0061P 61P/Shajn-Schaldach from Lumezzane Obs. (Sept. 10.08p4) and Nazaret Obs. (Sept. 21.07-08p3)
0051P 51P/Harrington from Lumezzane Obs. (Sept. 9.11-12p4 & 10.09-10p4), Grove Creek Obs. (Sept. 16.79p1), and PJMSO (Sept. 18.44-45p6)
0047P 47P/Ashbrook-Jackson from Vega del Thader Obs. (Sept. 14.86-87p3), Grove Creek Obs. (Sept. 16.53p1, 16.58p1 & 17.59p1), Nazaret Obs. (Sept. 16.91-94p4), Vicksburg Obs. (Sept. 17.19-22p3), and SSS (Sept. 20.51p1)
0029P 29P/Schwassmann-Wachmann 1 from Nazaret Obs. (Sept. 17.20p4) and Atlante Obs. (Sept. 21.18-20p3)
0017P 17P/Holmes from Nazaret Obs. (Sept. 14.22-24p3 & 17.22-23p3)
0006P 6P/d'Arrest from Grove Creek Obs. (Sept. 16.48p1, 16.54p1 & 17.56p1), Cristo Rey Obs. (Sept. 16.99-00p4), North Ryde Obs. (Sept. 20.62-65p2 & 21.57-59p2), and Kambah Obs. (Sept. 21.62p2)

MPEC 2008-S26 - "16:59 UT" - Comet P/2008 S1 = 2008 JK (Catalina-McNaught)

PK08S010 P/2008 S1 (Catalina-McNaught) (q=1.191 AU, Q=5.971 AU, TP=2008 Oct. 1.80823 TT) from SSS (Sept. 19.38p2, 20.39p2 & 21.38p1), North Ryde Obs. (Sept. 19.39-41p2, 20.38-40p2 & 21.39-40p2), and Farm Cove Obs. (Sept. 22.34-35p3)

MPEC 2008-S25 - "16:41 UT" - Comet C/2008 R3 (LINEAR)

CK08R030 C/2008 R3 (LINEAR) (i=43.2°, q=1.909 AU, Q=35.661 AU, TP=2008 Nov. 22.548 TT) from Kiev Comet Station (Sept. 8.93p1), Ageo Obs. (Sept. 9.65p2), Nazaret Obs. (Sept. 15.87-89p5), Cordell-Lorenz Obs. (Sept. 17.18-21p3), Montcabre Obs. (Sept. 17.81-82p3), and Vicksburg Obs. (Sept. 18.07-10p3)

MPEC 2008-S24 - "16:35 UT" - Comet C/2008 Q3 (Garradd)

CK08Q030 C/2008 Q3 (Garradd) (i=140.7°, q=1.799 AU, TP=2009 June 23.069 TT) from Kambah Obs. (Sept. 17.71-72p2 & 21.63-64p2) and Farm Cove Obs. (Sept. 22.39-40p3)

MPEC 2008-S23 - "16:26 UT" - Comet P/2008 Q2 (Ory)

PK08Q020 P/2008 Q2 (Ory) (q=1.382 AU, Q=5.099 AU, TP=2008 Oct. 19.003 TT) from Kiev Comet Station (Sept. 9.00-01p4), Table Mtn. Obs. (Sept. 16.32-35p4), Eschenberg Obs. (Sept. 20.85p3), Jaen Obs. (Sept. 20.96-98p2), Nazaret Obs. (Sept. 21.04-05p4), Spacewatch 0.9m (Sept. 21.36-39p3), CSS (Sept. 21.42-44p4), and Kambah Obs. (Sept. 21.70p2)

MPEC 2008-S22 - "16:01 UT" - Comet C/2008 Q1 (Maticic)

CK08Q010 C/2008 Q1 (Maticic) (i=118.6°, q=2.963 AU, TP=2008 Dec. 29.4482 TT) from Moletai Obs. (Aug. 21.86-90p3), Alginet Obs. (Sept. 2.84-85p3 & 15.80-82p3), Ametlla del Valles Obs. (Sept. 15.83-88p6 & 17.85-86p4), Naef Obs. (Sept. 15.85-86p2 & 16.84-86p2), Nazaret Obs. (Sept. 15.91-92p5), Table Mtn. Obs. (Sept. 16.16-18p4), Moriyama Obs. (Sept. 16.53-54p2), Atlante Obs. (Sept. 16.90-91p3), Montcabre Obs. (Sept. 17.80p2), Cordell-Lorenz Obs. (Sept. 19.15-17p2), and Jaen Obs. (Sept. 21.00-01p2)

MPEC 2008-S21 - "15:13 UT" - Comet C/2008 P1 (Garradd)

CK08P010 C/2008 P1 (Garradd) (i=64.3°, q=3.898 AU, TP=2009 July 22.7338 TT) from Beta Orionis Obs. (Sept. 16.98p1), Grove Creek Obs. (Sept. 17.56p1), Kambah Obs. (Sept. 17.68-69p2 & 21.65-66p2), and North Ryde Obs. (Sept. 19.51-52p2, 20.44-47p2 & 21.52-55p2)

<< DOU on 22 Sept. '08 >> MPEC 2008-S20 - "06:06 UT" - Daily Orbit Update

Observations of recently (no longer) risk-listed objects
K08R01J 2008 RJ1 (arc=17 days, H=17.7 ~977m) from Spacewatch 1.8m (Sept. 21.47-48p6)
K08R01G 2008 RG1 (arc=17 days, H=20.7 ~245m) from ARO (Sept. 18.27p3) and Spacewatch 1.8m (Sept. 21.45-46p3)
K08Q11S 2008 QS11 (arc=25 days, H=19.9 ~355m) from SSS (Sept. 19.61-64p4 & 21.60p2)
K08Q03T 2008 QT3 (arc=27 days, H=18.4 ~708m) from CSS (Sept. 21.26-28p4)
Observations of small asteroids (H>22.0)
K08S00A 2008 SA (arc=1 day, H=25.0 ~34m) from Sabino Canyon Obs. (Sept. 21.25p6) and Jim Young via Table Mtn. Obs. (Sept. 21.26-27p4)
K08R24W 2008 RW24 (arc=15 days, H=22.9 ~89m) from ARO (Sept. 18.22p5)
K08R24T 2008 RT24 (arc=12 days, H=24.4 ~45m) from ARO (Sept. 18.21p1)
K08R01K 2008 RK1 (Q=4.375 AU, arc=17 days, H=22.3 ~117m) from Spacewatch 1.8m (Sept. 21.50-51p3)
K06U00P 2006 UP (arc=3 opp, H=23.0 ~85m) from Spacewatch 1.8m (Sept. 21.48-49p3)
Observations of other objects
K08S00D 2008 SD (arc=2 days, H=19.4 ~446m) from SSS (Sept. 21.59-60p2 & 21.80p1)
K08S00C 2008 SC (q=0.325 AU, arc=2 days, H=21.7 ~155m) from SSS (Sept. 21.59p2 & 21.79p1)
K08R26T 2008 RT26 (arc=11 days, H=19.3 ~467m) from ARO (Sept. 18.35-36p2)
K08R24Y 2008 RY24 (arc=3 opp, H=17.8 ~933m) from CSS (Sept. 21.23-25p4)
K08R24Q 2008 RQ24 (arc=14 days, H=20.6 ~257m) from ARO (Sept. 19.23p1)
K08R00T 2008 RT (arc=17 days, H=19.6 ~407m) from ARO (Sept. 18.34-35p7)
K08Q00Z 2008 QZ (arc=30 days, H=20.4 ~282m) from CSS (Sept. 21.45-47p4)
K08P03L 2008 PL3 (arc=47 days, H=19.4 ~446m) from Stia Obs. (Sept. 20.78-80p4)
K08O00N 2008 ON (arc=54 days, H=20.3 ~295m) from ARO (Sept. 18.09-10p2)
K08N00U 2008 NU (Q=4.202 AU, arc=81 days, H=17.6 ~1.02 km) from Stia Obs. (Sept. 20.83-84p5)
K08M00Z 2008 MZ (Q=4.207 AU, arc=97 days, H=18.2 ~776m) from ARO (Sept. 18.41-42p6) and SSS (Sept. 19.77p1 & 20.67p1)
K08J07Z 2008 JZ7 (Q=4.382 AU, arc=137 days, H=18.6 ~645m) from ARO (Sept. 19.20-21p6)
K07R05F 2007 RF5 (arc=2 opp, H=18.4 ~708m) from SSS (Sept. 20.38-39p2)
K06W02Z 2006 WZ2 (arc=3 opp, H=16.8 ~1.48 km) from ARO (Sept. 17.35-36p5)
K06T00N 2006 TN (arc=2 opp, H=19.6 ~407m) from Spacewatch 1.8m (Sept. 21.34-35p3 at V=21.3-22.2)
K05W04K 2005 WK4 (arc=4 opp, H=20.1 ~323m) from ARO (Sept. 18.34p1)
K05R34C 2005 RC34 (arc=2 opp, H=19.7 ~389m) from ARO (Sept. 18.29-31p4)
K05L03R 2005 LR3 (arc=4 opp, H=17.2 ~1.23 km) from ARO (Sept. 18.40-41p5)
K04N08L 2004 NL8 (Q=4.417 AU, arc=3 opp, H=17.1 ~1.29 km) from ARO (Sept. 18.13p1)
K03R00M 2003 RM (Q=4.673 AU, arc=2 opp, H=19.8 ~371m) from CSS (Sept. 21.33-35p4)
K03G00W 2003 GW (i=49.4°, arc=3 opp, H=16.8 ~1.48 km) from ARO (Sept. 17.14-15p7), Balzaretto Obs. (Sept. 20.81p2), and Cesson Obs. (Sept. 20.84-85p4)
K02S41S 2002 SS41 (i=63.7°, arc=3 opp, H=17.2 ~1.23 km) from ARO (Sept. 17.30-31p5)
K02Q06Y 2002 QY6 (q=0.246 AU, arc=4 opp, H=19.5 ~426m) from ARO (Sept. 17.27-28p6)
K01U16Z 2001 UZ16 (arc=3 opp, H=19.5 ~426m) from CSS (Sept. 21.18-20p4)
K01S10G 2001 SG10 (arc=5 opp, H=20.4 ~282m) from ARO (Sept. 18.32p4)
K01O25G 2001 OG25 (arc=4 opp, H=19.8 ~371m) from ARO (Sept. 18.40-42p3)
K00P05K 2000 PK5 (arc=5 opp, H=17.7 ~977m) from ARO (Sept. 17.09-10p4)
K00J08Y 2000 JY8 (Q=4.468 AU, arc=3 opp, H=17.0 ~1.35 km) from Spacewatch 1.8m (Sept. 21.42-44p3 at V=21.8-22.5)
J98S15C 1998 SC15 (arc=5 opp, H=19.4 ~446m) from ARO (Sept. 19.17-19p3)
J98S00O 1998 SO (q=0.220 AU, arc=2 opp, H=20.6 ~257m) from Naef Obs. (Sept. 21.89-92p6)
J94A01W 1994 AW1 (arc=3 opp, H=17.5 ~1.07 km) from CSS (Sept. 21.17-19p4)
J91T02B 1991 TB2 (arc=2 opp, H=17.1 ~1.29 km) from Spacewatch 1.8m (Sept. 21.12-14p3)
I5851 185851 2000 DP107 from North Obs. (Sept. 20.94-95p3) and Taurus-1 Obs. (Sept. 21.93-94p10)
G3000 163000 2001 SW169 from Linceo Obs. (Sept. 20.93-95p3)
E2348 142348 2002 RX211 from SSS (Sept. 21.62p1)
E0288 140288 2001 SN289 from Naef Obs. (Sept. 21.89-91p2)
D8947 138947 2001 BA40 from CSS (Sept. 21.13-15p4)
A5140 105140 2000 NL10 from Jaen Obs. (Sept. 20.91p2)
96744 96744 1999 OW3 from Spacewatch 0.9m (Sept. 21.37-40p3)
65733 65733 1993 PC from Naef Obs. (Sept. 21.88-91p2)
16960 16960 1998 QS52 from Taurus-1 Obs. (Sept. 21.86-91p33)
11500 11500 1989 UR from Eschenberg Obs. (Sept. 21.77-78p5)
08567 8567 1996 HW1 from CSS (Sept. 21.42-44p4)
05143 5143 Heracles (1991 VL) from Jaen Obs. (Sept. 20.88-90p2)
03753 3753 Cruithne (1986 TO) from SSS (Sept. 19.78p1)

Observers on 22 September '08

A total of 59 observing facilities appear in today's MPECs.

Code	Observer / observatory
`349`	Ageo Obs. in Japan, 1 in MPEC 2008-S25 -- C/2008 R3
`J97`	Alginet Obs. in Spain, 2 in MPECs 2008-S22 & 2008-S27 -- C/2008 Q1, C/2005 S4
`B37`	Ametlla del Valles Obs. in Spain, 4 in MPECs 2008-S22 & 2008-S27 -- C/2008 Q1, C/2005 S4, C/2005 L3, 199P
`J20`	Aravaca Obs., 4 in MPEC 2008-S27 -- C/2008 J1, C/2007 N3, C/2006 W3, 205P
`251`	Arecibo in Puerto Rico, 1 in radar -- 137032
`H55`	Astronomical Research Obs. (ARO) in Illinois, 28 in MPECs 2008-S20, 2008-S28, 2008-S30, 2008-S31, 2008-S32, 2008-S33, 2008-S34 & 2008-S35 -- 2008 SU, 2008 ST, 2008 SS, 2008 SR, 2008 SQ, 2008 SO, 2008 RW24, 2008 RT26, 2008 RT24, 2008 RT, 2008 RQ24, 2008 RG1, 2008 ON, 2008 MZ, 2008 JZ7, 2007 MM13, 2006 WZ2, 2005 WK4, 2005 RC34, 2005 LR3, 2004 NL8, 2003 GW, 2002 SS41, 2002 QY6, 2001 SG10, 2001 OG25, 2000 PK5, 1998 SC15
`J51`	Atlante Obs. in the Canary Islands, 7 in MPECs 2008-S22 & 2008-S27 -- C/2008 Q1, C/2008 N1, C/2007 N3, C/2006 W3, C/2006 OF2, 205P, 29P
`A81`	Balzaretto Obs. in Italy, 1 in MPEC 2008-S20 -- 2003 GW
`I32`	Beta Orionis Obs. in Argentina, 2 in MPECs 2008-S21 & 2008-S27 -- C/2008 P1, C/2008 A1
`235`	CAST Obs. in Italy, 2 in MPEC 2008-S27 -- C/2006 W3, 205P
`B20`	Carmelita Obs. in Spain, 4 in MPEC 2008-S27 -- C/2008 J1, C/2007 N3, C/2006 W3, 205P
`703`	Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2008-S20, 2008-S23 & 2008-S27 -- 2008 RY24, 2008 QZ, 2008 QT3, P/2008 Q2, C/2008 N1, 2003 RM, 2001 UZ16, 1994 AW1, 138947, 8567
`B24`	Cesson Obs. in France, 1 in MPEC 2008-S20 -- 2003 GW
`A77`	Chante-Perdrix Obs. in France, 1 in MPEC 2008-S27 -- 68P
`850`	Cordell-Lorenz Obs. in Tennessee, 5 in MPECs 2008-S22, 2008-S25, 2008-S27, 2008-S28 & 2008-S30 -- 2008 SQ, 2008 SO, C/2008 R3, C/2008 Q1, 205P
`I31`	Cristo Rey Obs. in Argentina, 2 in MPEC 2008-S27 -- C/2008 A1, 6P
`448`	Desert Moon Obs. in New Mexico, 1 in MPEC 2008-S32 -- 2008 SS
`151`	Eschenberg Obs. in Switzerland, 3 in MPECs 2008-S20, 2008-S23 & 2008-S30 -- 2008 SQ, P/2008 Q2, 11500
`E85`	Farm Cove Obs. in New Zealand, 2 in MPECs 2008-S24 & 2008-S26 -- P/2008 S1, C/2008 Q3
`253`	Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 185851
`J95`	Great Shefford Obs. in England, 3 in MPECs 2008-S29, 2008-S30 & 2008-S32 -- 2008 SS, 2008 SQ, 2008 SP
`E16`	Grove Creek Obs. in New South Wales, 7 in MPECs 2008-S21 & 2008-S27 -- C/2008 P1, C/2007 N3, 205P, 67P, 51P, 47P, 6P
`379`	Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2008-S27 -- 205P
`J28`	Jaen Obs. in Spain, 4 in MPECs 2008-S20, 2008-S22 & 2008-S23 -- P/2008 Q2, C/2008 Q1, 105140, 5143
`415`	Kambah Obs. in the Australian Capital Territory, 7 in MPECs 2008-S21, 2008-S23, 2008-S24 & 2008-S27 -- C/2008 Q3, P/2008 Q2, C/2008 P1, P/2008 O2, P/2008 J3, C/2006 V1, 6P
`585`	Kiev Comet Station in the Ukraine, 4 in MPECs 2008-S23, 2008-S25 & 2008-S27 -- C/2008 R3, P/2008 Q2, P/2008 O2, C/2007 N3
`352`	Konan Obs. in Japan, 1 in MPEC 2008-S27 -- 205P
`J38`	La Vara Obs. in Spain, 2 in MPEC 2008-S27 -- C/2005 L3, 205P
`J59`	Linceo Obs. in Spain, 2 in MPECs 2008-S20 & 2008-S27 -- 163000, 205P
`130`	Lumezzane Obs. in Italy, 3 in MPEC 2008-S27 -- 67P, 61P, 51P
`J40`	Malaga Obs. in Spain, 4 in MPEC 2008-S27 -- C/2008 J1, C/2007 W1, C/2006 W3, 205P
`152`	Moletai Obs. in Lithuania, 3 in MPECs 2008-S22 & 2008-S27 -- C/2008 Q1, P/2008 L2, C/2007 W1
`J45`	Montana Cabreja Obs. in the Canary Islands, 2 in MPEC 2008-S27 -- C/2006 OF2, 205P
`213`	Montcabre Obs. in Spain, 3 in MPECs 2008-S22, 2008-S25 & 2008-S27 -- C/2008 R3, C/2008 Q1, 205P
`945`	Monte Deva Obs. in Spain, 4 in MPEC 2008-S27 -- C/2008 J1, C/2006 W3, C/2006 OF2, 205P
`900`	Moriyama Obs. in Japan, 2 in MPECs 2008-S22 & 2008-S30 -- 2008 SQ, C/2008 Q1
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2008-S27, 2008-S29, 2008-S30, 2008-S31 & 2008-S33 -- 2008 ST, 2008 SR, 2008 SQ, 2008 SP, P/2008 O2
`J93`	Mt. Tuffley Obs. in England, 1 in MPEC 2008-S27 -- C/2006 OF2
`A13`	Naef Obs. in Switzerland, 5 in MPECs 2008-S20, 2008-S22 & 2008-S30 -- 2008 SQ, C/2008 Q1, 1998 SO, 65733, 140288
`J47`	Nazaret Obs. in Spain, 15 in MPECs 2008-S22, 2008-S23, 2008-S25, 2008-S27 & 2008-S32 -- 2008 SS, C/2008 R3, P/2008 Q2, C/2008 Q1, P/2008 O2, C/2007 W1, C/2007 N3, C/2006 OF2, 205P, 199P, 67P, 61P, 47P, 29P, 17P
`J69`	North Obs. in England, 1 in MPEC 2008-S20 -- 185851
`423`	North Ryde Obs. in New South Wales, 4 in MPECs 2008-S21, 2008-S26 & 2008-S27 -- P/2008 S1, C/2008 P1, P/2008 J3, 6P
`B49`	Paus Obs. in Spain, 2 in MPEC 2008-S27 -- P/2008 L2, 205P
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPEC 2008-S27 -- 205P, 51P
`473`	Remanzacco Obs. in Italy, 1 in MPEC 2008-S30 -- 2008 SQ
`854`	Sabino Canyon Obs. in Arizona, 5 in MPECs 2008-S20, 2008-S28, 2008-S30, 2008-S32 & 2008-S33 -- 2008 ST, 2008 SS, 2008 SQ, 2008 SO, 2008 SA
`E12`	Siding Spring Survey (SSS) in New South Wales, 15 in MPECs 2008-S20, 2008-S26, 2008-S27 & 2008-S32 -- 2008 SS, 2008 SD, 2008 SC, P/2008 S1, 2008 QS11, 2008 MZ, 2007 RF5, C/2007 N3, C/2006 V1, 142348, 3753, 199P, 68P, 67P, 47P
`510`	Siegen Obs. in Germany, 5 in MPEC 2008-S27 -- C/2008 J1, C/2007 W1, C/2007 N3, C/2006 W3, C/2006 OF2
`071`	Smolyan Obs. in Bulgaria, 4 in MPEC 2008-S27 -- C/2007 N3, C/2006 W3, C/2006 OF2, C/2005 L3
`691`	Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2008-S20, 2008-S23, 2008-S28 & 2008-S34 -- 2008 SU, 2008 SO, P/2008 Q2, 96744
`291`	Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2008-S20, 2008-S28, 2008-S31 & 2008-S34 -- 2008 SU, 2008 SR, 2008 SO, 2008 RK1, 2008 RJ1, 2008 RG1, 2006 UP, 2006 TN, 2000 JY8, 1991 TB2
`A78`	Stia Obs. in Italy, 2 in MPEC 2008-S20 -- 2008 PL3, 2008 NU
`673`	Table Mtn. Obs. in southern California, 4 in MPECs 2008-S22, 2008-S23 & 2008-S27 -- P/2008 Q2, C/2008 Q1, C/2008 N1, 205P
`6735`	Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-S20 -- 2008 SA
`A98`	Taurus-1 Obs. in Belarus, 2 in MPEC 2008-S20 -- 185851, 16960
`F85`	Tiki Obs. in Tahiti, 1 in MPEC 2008-S30 -- 2008 SQ
`J70`	Vega del Thader Obs. in Spain, 2 in MPEC 2008-S27 -- 205P, 47P
`231`	Vesqueville Obs. in Belgium, 1 in MPEC 2008-S27 -- 205P
`H47`	Vicksburg Obs. in Mississippi, 4 in MPECs 2008-S25 & 2008-S27 -- C/2008 R3, C/2007 N3, 205P, 47P
`367`	Yatsuka Obs., 1 in MPEC 2008-S27 -- 205P

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

Impact Risk Monitoring on 22 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 ST	JPL Sentry	2026	2027-2041	10	4.0e-06	-6.38	-6.84	0	JPL: "Analysis based on 21 observations spanning .22444 days (2008-Sep-22.16113 to 2008-Sep-22.38557)." Diameter approximately 0.013 km. from mean, weighted H=27.1.

2008 SR	JPL Sentry	2026	2010-2105	17	5.5e-09	-5.39	-5.54	0	JPL: "Analysis based on 18 observations spanning .90029 days (2008-Sep-21.43219 to 2008-Sep-22.33248)." Diameter approximately 0.186 km. from mean, weighted H=21.3.

2008 SO	JPL Sentry	2026	2013-2108	79	1.5e-07	-4.57	-4.82	0	JPL: "Analysis based on 20 observations spanning 1.0572 days (2008-Sep-21.23903 to 2008-Sep-22.29621)." Diameter approximately 0.220 km. from mean, weighted H=20.9.

2008 KN11	NEODyS	1937	2046	1	2.6e-07	-5.57	-5.57	0	NEODyS: "Based on 129 optical observations (of which 0 are rejected as outliers) from 2008/05/30.335 to 2008/06/19.985."

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 22 September '08

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

2314	Noted Radar Astrometry database addition - see above
2026	Noted that JPL Sentry has posted 2008 SO as an impact risk - see above Noted that JPL Sentry has posted 2008 SR as an impact risk - see above Noted that JPL Sentry has posted 2008 ST as an impact risk - see above
1937	Noted that NEODyS has updated its 2008 KN11 risk assessment - see above Noted Radar Astrometry database addition - see above
1832	Grabbed MPEC 2008-S24 - Comet C/2008 Q3 (Garradd) - see above Grabbed MPEC 2008-S25 - Comet C/2008 R3 (LINEAR) - see above Grabbed MPEC 2008-S26 - Comet P/2008 S1 = 2008 JK (Catalina-McNaught) - see above Grabbed MPEC 2008-S27 - Observations of Comets - see above Grabbed MPEC 2008-S28 - 2008 SO - see above Grabbed MPEC 2008-S29 - 2008 SP - see above Grabbed MPEC 2008-S30 - 2008 SQ - see above Grabbed MPEC 2008-S31 - 2008 SR - see above Grabbed MPEC 2008-S32 - 2008 SS - see above Grabbed MPEC 2008-S33 - 2008 ST - see above Grabbed MPEC 2008-S34 - 2008 SU - see above Grabbed MPEC 2008-S35 - 2007 MM13 - see above
1637	Grabbed MPEC 2008-S21 - Comet C/2008 P1 (Garradd) - see above Grabbed MPEC 2008-S22 - Comet C/2008 Q1 (Maticic) - see above Grabbed MPEC 2008-S23 - Comet P/2008 Q2 (Ory) - see above
1410	Grabbed MPEC 2008-S20 - Daily Orbit Update - see above

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