19 Sep '07 Tracking News

Contents on 19 September '07

IAU Minor Planet Center
- NEOCP Activity -- ten listings: 4 new, 6 updated
- New MPECs -- thirteen MPECs
- Observers -- 60 observing facilities
Impact Risk Monitoring -- four objects reported
Chronology

Resources:

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

Note: 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 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 19 September '07

The MPC's NEO Confirmation Page has 10 listings: 4 new, 6 updated

When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new and six updated listings. Of these, eight were "one nighters." So far Tracking News has counted a total of sixteen 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 19 September '07

Minor Planet Electronic Circulars

As of last check at 2355 UTC, there have been thirteen MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2007-S17 time-stamped "03:01 UT" - 2007 SJ - see below
MPEC 2007-S18 time-stamped "06:08 UT" - Daily Orbit Update - see below
MPEC 2007-S19 time-stamped "15:04 UT" - Comet C/2007 N3 (Lulin) - see below
MPEC 2007-S20 time-stamped "15:08 UT" - Comet C/2007 Q1 (Garradd) - see below
MPEC 2007-S21 time-stamped "15:11 UT" - Comet P/2007 Q2 (Gilmore) - see below
MPEC 2007-S22 time-stamped "15:15 UT" - Comet C/2007 Q3 (Siding Spring) - see below
MPEC 2007-S23 time-stamped "15:20 UT" - Comet P/2007 R1 (Larson) - see below
MPEC 2007-S24 time-stamped "15:25 UT" - Comet P/2007 R2 (Gibbs) - see below
MPEC 2007-S25 time-stamped "15:32 UT" - Comet P/2007 R3 (Gibbs) - see below
MPEC 2007-S26 time-stamped "15:45 UT" - Observations of Comets - see below
MPEC 2007-S27 time-stamped "22:01 UT" - 2003 SR422 - see below
MPEC 2007-S28 time-stamped "22:20 UT" - 2007 RT19 - see below
MPEC 2007-S29 time-stamped "22:41 UT" - 2004 VN112

MPEC 2007-S29 - "22:41 UT" - 2004 VN112

K04VB2N 2004 VN112 (q=47.413 AU, Q=584.366 AU, H=6.4 ~178 km) was discovered at 0238 UT 06 Nov. 2004 by Cerro Tololo Inter-American Obs. (CTIO), which observed it at 2004 Nov. 6.11-13p2 at I=22.2-7, 2004 Nov. 14.12-14p2 at I=22.2-23.1, 2004 Nov. 20.07-09p2 at I=22.2-23.2, 2004 Dec. 7.11-13p2 at I=22.4-6, 2004 Dec. 11.09-11p2 at I=22.3-9, 2004 Dec. 15.09-11p2 at I=22.2-8, 2005 Dec. 24.10-11p2 at I=22.4-8, 2005 Dec. 29.09-12p2 at I=22.5-9, and 2005 Dec. 31.07p1 at R=23.0.

MPEC 2007-S28 - "22:20 UT" - 2007 RT19

K07R19T 2007 RT19 (H=18.0 ~851m) was discovered at 0906 UT 14 Sept. by LINEAR, which observed it at Sept. 14.38-40p3, 15.36-39p3, and 19.30-34p5. The discovery was confirmed by Great Shefford Obs. (Sept. 15.16-17p3), Astronomical Research Obs. (ARO) (Sept. 15.31p3), and Jim Young via Table Mtn. Obs. (Sept. 15.46-48p4).

MPEC 2007-S27 - "22:01 UT" - 2003 SR422

K03Sg2R 2003 SR422 (KBO, q=37.767 AU, Q=42.284 AU, H=7.1 ~129 km) was discovered at 0358 UT 28 Sept. 2003 by CTIO, which observed it at 2003 Sept. 28.17p1 at R=22.8, 2003 Oct. 19.16p1 at I=22.4, 2003 Oct. 22.14-16p2 at I=22.4-9, 2004 Nov. 12.16p1 at I=22.5, 2004 Nov. 16.14-16p2 at I=22.3-9, 2004 Nov. 20.17-18p2 at I=22.8-23.1, 2004 Dec. 7.17-19p2 at I=22.4-23.1, 2004 Dec. 15.15-17p2 at I=22.4-23.0, 2005 Jan. 7.09-10p2 at I=22.5-23.1, 2005 Jan. 11.08p1 at R=22.9, and 2005 Jan. 15.10p1 at R=22.9.

MPEC 2007-S26 - "15:45 UT" - Observations of Comets

CK07O010 C/2007 O1 (LINEAR) from Schiaparelli Obs. (Sept. 7.84p1 & 7.90p1), Table Mtn. Obs. (Sept. 8.15-17p4), Ageo Obs. (Sept. 8.53p2), and LINEAR (Sept. 15.14-16p3)
PK07N010 P/2007 N1 (McNaught) from Hradec Kralove Obs. (Sept. 13.94-95p5 & 15.97-98p5) and Moriyama Obs. (Sept. 16.73-74p2)
CK07M030 C/2007 M3 (LINEAR) from Ageo Obs. (Sept. 8.48-49p3), Buchloe Obs. (Sept. 12.87-88p3), Montcabre Obs. (Sept. 15.79p3), Masquefa Obs. (Sept. 15.83-85p3), Rodeno Obs. (Sept. 15.83-84p3), and Hiratsuka Obs. (Sept. 16.45-46p3)
CK07K010 C/2007 K1 (Lemmon) from Schiaparelli Obs. (Sept. 1.93p1), Buchloe Obs. (Sept. 12.86p1), and Chante-Perdrix Obs. (Sept. 15.81p1 & 16.81-88p5)
PK07H010 P/2007 H1 (McNaught) from Lumezzane Obs. (Sept. 9.01p4), Montana Cabreja Obs. (Sept. 9.10-13p2), CAST Obs. (Sept. 11.94p1 & 15.93p1), Kambah Obs. (Sept. 12.62-63p2 & 18.68-69p2), Monte Deva Obs. (Sept. 12.00-01p5), Hradec Kralove Obs. (Sept. 13.91p5 & 15.92-93p5), Vitebsk Obs. (Sept. 14.95-96p5), Masquefa Obs. (Sept. 15.07-09p3), Vicksburg Obs. (Sept. 15.32-34p3 & 17.28-34p3), Rodeno Obs. (Sept. 15.96-97p3), Moriyama Obs. (Sept. 16.62-64p2), Stammersdorf Obs. (Sept. 16.90-91p4), and Iluro Obs. (Sept. 16.97-98p3)
CK07G010 C/2007 G1 (LINEAR) from CAST Obs. (Sept. 11.79p1 & 15.80p1), Monte Deva Obs. (Sept. 12.91-92p3), Isle of Man Obs. (Sept. 12.91p3), Hradec Kralove Obs. (Sept. 13.77-79p5), Montcabre Obs. (Sept. 14.79-80p3), Rodeno Obs. (Sept. 15.85-87p3), Hiratsuka Obs. (Sept. 16.47p2), and La Murta Obs. (Sept. 16.83p3)
CK07E010 C/2007 E1 (Garradd) from LINEAR (Sept. 14.42-47p5) and Inastars Obs. (Sept. 19.03p1)
CK06W030 C/2006 W3 (Christensen) from Ageo Obs. (Sept. 7.79-80p2) and Vitebsk Obs. (Sept. 14.93-94p3)
CK06U060 C/2006 U6 (Spacewatch) from North Ryde Obs. (Sept. 13.59-62p2, 14.59-62p2 & 18.55-58p2), Moriyama Obs. (Sept. 16.70-71p2 & 18.65-66p2), and Kambah Obs. (Sept. 18.72p2)
CK06S050 C/2006 S5 (Hill) from LINEAR (Sept. 14.42-47p5) and Moriyama Obs. (Sept. 16.80-81p2)
CK06S030 C/2006 S3 (LONEOS) from Montcabre Obs. (Aug. 11.02-03p3) and LONEOS (Sept. 5.34-41p4)
CK06O02F C/2006 OF2 (Broughton) from Lumezzane Obs. (Sept. 1.93p4), Remanzacco Obs. (Sept. 7.81p1), Montana Cabreja Obs. (Sept. 9.10-13p2), Ca del Monte Obs. (Sept. 9.89p1), CAST Obs. (Sept. 11.94p1), LONEOS (Sept. 13.22-29p4), Hradec Kralove Obs. (Sept. 13.90-91p5 & 15.91p5), Mataro Obs. (Sept. 14.82-83p3), Montcabre Obs. (Sept. 14.84p3), Vitebsk Obs. (Sept. 14.85-87p2), Chante-Perdrix Obs. (Sept. 14.87-88p3), Masquefa Obs. (Sept. 14.93-95p3), Nazaret Obs. (Sept. 14.93-95p4 & 18.89-91p4), Vicksburg Obs. (Sept. 15.08-09p2, 15.17p1, 16.18p2 & 17.18-19p2), LINEAR (Sept. 16.18-22p5), Moriyama Obs. (Sept. 16.60-61p2 & 18.61-62p2), Carmelita Obs. (Sept. 16.80-81p3), La Murta Obs. (Sept. 16.84p3), Stammersdorf Obs. (Sept. 16.87-89p4), and Posadas Obs. (Sept. 17.94-96p3)
CK06M010 C/2006 M1 (LINEAR) from Moriyama Obs. (Sept. 14.66-67p2 & 16.75-76p2) and Ageo Obs. (Sept. 16.69-70p2)
CK06K010 C/2006 K1 (McNaught) from the Siding Spring Survey (SSS) (Sept. 15.75p1) and Moriyama Obs. (Sept. 16.79-80p2)
CK05S040 C/2005 S4 (McNaught) from Lumezzane Obs. (Sept. 1.93-97p3), New Millennium Obs. (Sept. 8.82-89p5, 10.82-89p6 & 12.83-89p5), Hennef Obs. (Sept. 13.85p2 & 15.82-83p3), Vicksburg Obs. (Sept. 15.14-15p2, 16.12-13p2 & 17.09-10p2), and CAST Obs. (Sept. 15.81p1)
CK05Q010 C/2005 Q1 (LINEAR) from Schiaparelli Obs. (Sept. 7.89p1 & 12.91p1)
CK05L030 C/2005 L3 (McNaught) from CAST Obs. (Sept. 11.80p1 & 15.79p1), Buchloe Obs. (Sept. 12.85p2), Monte Deva Obs. (Sept. 12.88-89p3), Mataro Obs. (Sept. 14.80-81p3), Rodeno Obs. (Sept. 15.81-82p3), Vicksburg Obs. (Sept. 16.04-05p2 & 17.04-05p2), Hiratsuka Obs. (Sept. 16.44p3), Montcabre Obs. (Sept. 16.79p3), and La Murta Obs. (Sept. 16.83-84p3)
CK05B010 C/2005 B1 (Christensen) from Buchloe Obs. (Aug. 12.98p1 & Sept. 12.92p3)
0188P 188P/LINEAR-Mueller from New Millennium Obs. (Sept. 9.06-12p6), LINEAR (Sept. 13.23-28p5, 15.29-33p5 & 16.24-29p5), Atlante Obs. (Sept. 13.94-96p3), Montana Blanca Obs. (Sept. 14.93p1), Nazaret Obs. (Sept. 14.96-97p3 & 15.99-00p4), Rodeno Obs. (Sept. 15.91-92p3), CAST Obs. (Sept. 15.93p1), Hradec Kralove Obs. (Sept. 15.94-95p5), Iluro Obs. (Sept. 16.99-00p3), Montcabre Obs. (Sept. 17.86-87p3), and Moriyama Obs. (Sept. 18.63-64p2)
0139P 139P/Vaisala-Oterma from New Millennium Obs. (Sept. 9.08-14p6), Pic du Midi Obs. (Sept. 13.00-05p3 & 15.04-08p3), LONEOS (Sept. 13.30-37p4 & 14.41-49p4), and the Mt. Lemmon Survey (MLS) (Sept. 14.32-34p4)
0136P 136P/Mueller 3 from Kambah Obs. (Sept. 12.58-59p2 & 15.59p2), Moriyama Obs. (Sept. 14.62-63p2), LINEAR (Sept. 15.24-29p5 & 18.23-28p5), and Vicksburg Obs. (Sept. 15.29-31p2)
0128P 128P/Shoemaker-Holt 1 from LINEAR (Sept. 13.41-46p5 & 16.43-47p3)
0117P 117P/Helin-Roman-Alu 1 from New Millennium Obs. (Sept. 9.11p2, 9.16p2 & 11.15-16p2) and Iluro Obs. (Sept. 17.07-09p2)
0113P 113P/Spitaler from Schiaparelli Obs. (Sept. 11.98p1 & 12.06p1), Buchloe Obs. (Sept. 12.91p3), LINEAR (Sept. 13.24-28p4 & 16.25-29p4), LONEOS (Sept. 13.31-39p4 & 14.42-47p3), MLS (Sept. 15.33-35p4), and Kambah Obs. (Sept. 15.64-65p2)
0093P 93P/Lovas 1 from Lumezzane Obs. (Sept. 9.05p4), CAST Obs. (Sept. 11.92p1 & 15.94p1), the Catalina Sky Survey (CSS) (Sept. 12.32-34p4 & 18.40-42p4), Siegen Obs. (Sept. 12.93-94p3), Monte Deva Obs. (Sept. 13.01-03p5), Hradec Kralove Obs. (Sept. 13.92p5 & 15.95-96p5), Mataro Obs. (Sept. 14.89p2), Vitebsk Obs. (Sept. 14.97-98p3), Masquefa Obs. (Sept. 15.15-16p3), RAS Obs. Mayhill (Sept. 15.24-25p2), Rodeno Obs. (Sept. 15.93-94p3), Moriyama Obs. (Sept. 16.72-73p2), Iluro Obs. (Sept. 17.01-02p3), and Vicksburg Obs. (Sept. 17.35p2)
0050P 50P/Arend from CAST Obs. (Sept. 11.96p1 & 15.97p1), Gravenwezel (Sept. 14.01-02p5), Atlante Obs. (Sept. 14.98p2), Masquefa Obs. (Sept. 15.17-18p3), RAS Mayhill (Sept. 15.39p2), Hradec Kralove Obs. (Sept. 15.99-00p5), Iturrieta Obs. (Sept. 16.06-07p2), and Moriyama Obs. (Sept. 18.67p2)
0046P 46P/Wirtanen from Ageo Obs. (Sept. 9.59p3), Kambah Obs. (Sept. 12.56-57p2 & 18.63-64p2), North Ryde Obs. (Sept. 12.57-59p2, 13.49p1, 13.55p1, 14.50-54p2 & 18.48-51p2), SSS (Sept. 13.54p1), and Montana Blanca Obs. (Sept. 15.95p1)
0029P 29P/Schwassmann-Wachmann 1 from Gualba Obs. (Sept. 12.15p2, 13.18p2, 17.16-17p2 & 18.16-17p4), LINEAR (Sept. 14.42-47p5), and CAST Obs. (Sept. 15.98p1)
0017P 17P/Holmes from Lumezzane Obs. (Sept. 9.06-07p4) and Hradec Kralove Obs. (Sept. 13.93-94p5 & 15.98-01p5)
0008P 8P/Tuttle from CAST Obs. (Sept. 11.90p1 & 15.85p1), Chante-Perdrix Obs. (Sept. 13.88-90p3), and Atlante Obs. (Sept. 15.02-03p3)

MPEC 2007-S25 - "15:32 UT" - Comet P/2007 R3 (Gibbs)

PK07R030 P/2007 R3 (Gibbs) (q=2.197 AU, Q=7.462 AU, TP=2007 June 5.042 TT) from CAST Obs. (Sept. 15.95p1), ARO (Sept. 17.26p1), and Nazaret Obs. (Sept. 18.97p1)

MPEC 2007-S24 - "15:25 UT" - Comet P/2007 R2 (Gibbs)

PK07R020 P/2007 R2 (Gibbs) (Q=5.486 AU, TP=2007 Aug. 26.496 TT) from Remanzacco Obs. (Sept. 11.95-99p3), ARO (Sept. 12.33-35p3), Buchloe Obs. (Sept. 12.94p1), Schiaparelli Obs. (Sept. 13.13-16p2), LINEAR (Sept. 13.34-39p5), MLS (Sept. 15.47-51p8), Ageo Obs. (Sept. 16.74p2), and Nazaret Obs. (Sept. 18.07-10p3)

MPEC 2007-S23 - "15:20 UT" - Comet P/2007 R1 (Larson)

PK07R010 P/2007 R1 (Larson) (q=4.333 AU, Q=7.763 AU, TP=2007 Aug. 13.146 TT) from Buchloe Obs. (Sept. 12.90p3), LONEOS (Sept. 13.32-39p4), Atlante Obs. (Sept. 14.00-03p3), Ageo Obs. (Sept. 15.68-69p2), Lulin Minor Bodies Tracking (LIMIT) (Sept. 15.75-79p3), Vitebsk Obs. (Sept. 15.88p1), Frasso Sabino Obs. (Sept. 15.96p1), LINEAR (Sept. 16.24-28p4), and Moriyama Obs. (Sept. 16.69p2 & 18.64-65p2)

MPEC 2007-S22 - "15:15 UT" - Comet C/2007 Q3 (Siding Spring)

CK07Q030 C/2007 Q3 (Siding Spring) (i=65.7°, q=2.249 AU, TP=2009 Oct. 7.081 TT) from North Ryde Obs. (Sept. 13.65-67p2, 14.66-69p2 & 18.62-64p2)

MPEC 2007-S21 - "15:11 UT" - Comet P/2007 Q2 (Gilmore)

PK07Q020 P/2007 Q2 (Gilmore) (q=1.841 AU, Q=9.402 AU, TP=2007 Aug. 23.903 TT) from the Spacewatch 0.9m telescope (Sept. 11.16-20p3 & 15.16-20p3), Buchloe Obs. (Sept. 12.89p3), Table Mtn. Obs. (Sept. 13.32-33p4), Kambah Obs. (Sept. 15.56-57p2), Vitebsk Obs. (Sept. 15.86p2), Remanzacco Obs. (Sept. 15.86p1), and Nazaret Obs. (Sept. 15.91-94p3)

MPEC 2007-S20 - "15:08 UT" - Comet C/2007 Q1 (Garradd)

CK07Q010 C/2007 Q1 (Garradd) (i=81.9°, q=2.978 AU, TP=2006 Dec. 10.844 TT) from Buchloe Obs. (Sept. 12.93p1) and CSS (Sept. 14.38-39p4)

MPEC 2007-S19 - "15:04 UT" - Comet C/2007 N3 (Lulin)

CK07N030 C/2007 N3 (Lulin) (i=178.4°, q=1.212 AU, TP=2009 Jan. 10.7580 TT) from Remanzacco Obs. (Sept. 7.84p1), Lumezzane Obs. (Sept. 8.90-91p4), MLS (Sept. 11.24-26p4), LINEAR (Sept. 13.17-22p4 & 16.17-22p5), North Ryde Obs. (Sept. 13.43-45p2 & 14.45-47p2), Frasso Sabino Obs. (Sept. 15.87p1), Nazaret Obs. (Sept. 16.89-91p3), and Kitami Obs. (Sept. 18.50-52p3)

<< DOU on 19 Sept. '07 >> MPEC 2007-S18 - "06:08 UT" - Daily Orbit Update

Observations of risk-listed objects
K07R19Y 2007 RY19 (small asteroid, arc=5 days, H=22.5 ~107m) from Saint-Barthelemy Obs. (Sept. 19.06-07p4)
K07R09U 2007 RU9 (arc=8 days, H=20.8 ~234m) from LINEAR (Sept. 18.19-23p3)
Observations of recently (no longer) risk-listed objects
K07R09V 2007 RV9 (arc=8 days, H=20.2 ~309m) from ARO (Sept. 16.14p1)
K07P27V 2007 PV27 (arc=35 days, H=20.2 ~309m) from ARO (Sept. 18.06-07p3)
Observations of small asteroids (H>22.0)
K07S00H 2007 SH (arc=1 day, H=26.3 ~19m) from LINEAR (Sept. 18.23-28p5)
K07RE6S 2007 RS146 (arc=3 days, H=23.3 ~74m) from Great Shefford Obs. (Sept. 16.05p2)
K07R19W 2007 RW19 (arc=5 days, H=24.9 ~35m) from Inastars Obs. (Sept. 18.98-01p8)
K07R15P 2007 RP15 (arc=5 days, H=22.7 ~98m) from LINEAR (Sept. 18.19-23p4)
K07R12S 2007 RS12 (arc=6 days, H=23.1 ~81m) from Spacewatch 0.9m (Sept. 18.42-44p2)
K07R09P 2007 RP9 (arc=6 days, H=23.1 ~81m) from Linz Obs. (Sept. 15.77-78p2)
K07R08Y 2007 RY8 (arc=8 days, H=25.2 ~31m) from Spacewatch 0.9m (Sept. 14.30-32p2)
Observations of other objects
K07R17U 2007 RU17 (q=0.363 AU, arc=6 days, H=18.0 ~851m) from ARO (Sept. 18.20-21p3) and Inastars Obs. (Sept. 18.93-95p3)
K07R09Q 2007 RQ9 (q=2.236 AU, arc=106 days, H=15.5 ~2.69 km) from the Spacewatch 1.8m telescope (Sept. 19.11-12p3)
K07P08E 2007 PE8 (arc=127 days, H=19.4 ~446m) from New Millennium Obs. (Sept. 10.85-86p2 & 12.86-88p3) and El Leoncito Obs. (Sept. 18.14-15p3)
K07L32R 2007 LR32 (arc=115 days, H=17.2 ~1.23 km) from New Millennium Obs. (Sept. 10.87-93p6 & 12.87-93p5)
K07F42V 2007 FV42 (arc=182 days, H=17.9 ~891m) from El Leoncito Obs. (Sept. 18.16-17p3)
K07DA3T 2007 DT103 (arc=2 opp, H=19.2 ~490m) from El Leoncito Obs. (Sept. 17.21-22p3)
K05S00G 2005 SG (arc=4 opp, H=19.0 ~537m) from CSS (Sept. 18.43-45p4)
K04K01E 2004 KE1 (arc=2 opp, H=21.6 ~162m) from El Leoncito Obs. (Sept. 18.22-24p3)
K03E54F 2003 EF54 (arc=6 opp, H=20.0 ~339m) from CSS (Sept. 18.40-42p4)
K03B47T 2003 BT47 (arc=3 opp, H=17.5 ~1.07 km) from Spacewatch 0.9m (Sept. 15.40-43p3)
K02T66D 2002 TD66 (arc=3 opp, H=19.9 ~355m) from Spacewatch 0.9m (Sept. 14.18-20p2)
K02N04N 2002 NN4 (arc=4 opp, H=20.0 ~339m) from New Millennium Obs. (Sept. 10.83p2, 10.89p2, 11.83-85p3, 11.90p2, 12.83p2 & 12.90p1)
K01R47Y 2001 RY47 (arc=3 opp, H=19.4 ~446m) from SSS (Sept. 18.65-68p4)
J99T12L 1999 TL12 (arc=5 opp, H=18.7 ~616m) from MLS (Sept. 18.42-44p8 & 18.49-50p4)
J99S05O 1999 SO5 (arc=2 opp, H=20.9 ~224m) from ARO (Sept. 18.38-39p3 at V=22.1-3) and MLS (Sept. 18.45-47p4)
J88P00A 1988 PA (arc=3 opp, H=17.4 ~1.12 km) from LINEAR (Sept. 18.30-34p5) and Goodricke-Pigott Obs. (Sept. 18.38-40p3)
F9495 159495 2000 UV16 from El Leoncito Obs. (Sept. 17.99-01p3)
F4330 154330 2002 VX94 from Spacewatch 0.9m (Sept. 14.23-25p3)
17182 17182 1999 VU from CSS (Sept. 18.40-42p4)
16636 16636 1993 QP from New Millennium Obs. (Sept. 10.85-91p8, 11.85-92p10 & 12.85-92p9) and Ametlla del Valles Obs. (Sept. 16.86-00p40)
04486 4486 Mithra (1987 SB) from MLS (Sept. 18.40-42p4)

MPEC 2007-S17 - "03:01 UT" - 2007 SJ

K07S00J 2007 SJ (risk-listed, Earth MOID=6.0 LD, H=16.2 ~1.95 km) was discovered at 0422 UT 17 Sept. by LINEAR, which observed it at Sept. 17.18-22p4. The discovery was confirmed by Great Shefford Obs. (Sept. 17.98-99p3), Guidestar Obs. (Sept. 18.80-82p3), Inastars Obs. (Sept. 18.83-84p3), Saint-Barthelemy Obs. (Sept. 18.87-88p4), Remanzacco Obs. (Sept. 18.93-95p3), and Cordell-Lorenz Obs. (Sept. 19.08-10p2).

Observers on 19 September '07

A total of 60 observing facilities appear in today's MPECs.

Code	Observer / observatory
`349`	Ageo Obs. in Japan, 7 in MPECs 2007-S23, 2007-S24 & 2007-S26 -- 2007 R2, 2007 R1, 2007 O1, 2007 M3, 2006 W3, 2006 M1, 46P
`B37`	Ametlla del Valles Obs. in Spain, 1 in MPEC 2007-S18 -- 16636
`H55`	Astronomical Research Obs. in Illinois, 7 in MPECs 2007-S18, 2007-S24, 2007-S25 & 2007-S28 -- 2007 RV9, 2007 RU17, 2007 RT19, 2007 R3, 2007 R2, 2007 PV27, 1999 SO5
`J51`	Atlante Obs. in the Canary Islands, 4 in MPECs 2007-S23 & 2007-S26 -- 2007 R1, 188P, 50P, 8P
`215`	Buchloe Obs. in Germany, 9 in MPECs 2007-S20, 2007-S21, 2007-S23, 2007-S24 & 2007-S26 -- 2007 R2, 2007 R1, 2007 Q2, 2007 Q1, 2007 M3, 2007 K1, 2005 L3, 2005 B1, 113P
`235`	CAST Obs. in Italy, 11 in MPECs 2007-S25 & 2007-S26 -- 2007 R3, 2007 H1, 2007 G1, 2006 OF2, 2005 S4, 2005 L3, 188P, 93P, 50P, 29P, 8P
`B14`	Ca del Monte Obs. in Italy, 1 in MPEC 2007-S26 -- 2006 OF2
`B20`	Carmelita Obs. in Spain, 1 in MPEC 2007-S26 -- 2006 OF2
`703`	Catalina Sky Survey in Arizona, 5 in MPECs 2007-S18, 2007-S20 & 2007-S26 -- 2007 Q1, 2005 SG, 2003 EF54, 17182, 93P
`807`	Cerro Tololo Inter-American Obs. in Chile, 2 in MPECs 2007-S27 & 2007-S29 -- 2004 VN112, 2003 SR422
`A77`	Chante-Perdrix Obs. in France, 3 in MPEC 2007-S26 -- 2007 K1, 2006 OF2, 8P
`850`	Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2007-S17 -- 2007 SJ
`808`	El Leoncito Obs. in Argentina, 5 in MPEC 2007-S18 -- 2007 PE8, 2007 FV42, 2007 DT103, 2004 KE1, 159495
`157`	Frasso Sabino Obs. in Italy, 2 in MPECs 2007-S19 & 2007-S23 -- 2007 R1, 2007 N3
`683`	Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2007-S18 -- 1988 PA
`145`	Gravenwezel, 1 in MPEC 2007-S26 -- 50P
`J95`	Great Shefford Obs. in England, 3 in MPECs 2007-S17, 2007-S18 & 2007-S28 -- 2007 SJ, 2007 RT19, 2007 RS146
`442`	Gualba Obs. in Spain, 1 in MPEC 2007-S26 -- 29P
`A17`	Guidestar Obs. in Germany, 1 in MPEC 2007-S17 -- 2007 SJ
`B43`	Hennef Obs., 1 in MPEC 2007-S26 -- 2005 S4
`D88`	Hiratsuka Obs., 3 in MPEC 2007-S26 -- 2007 M3, 2007 G1, 2005 L3
`048`	Hradec Kralove Obs. in the Czech Republic, 8 in MPEC 2007-S26 -- 2007 N1, 2007 H1, 2007 G1, 2006 OF2, 188P, 93P, 50P, 17P
`B19`	Iluro Obs. in Spain, 4 in MPEC 2007-S26 -- 2007 H1, 188P, 117P, 93P
`B15`	Inastars Obs. in Germany, 4 in MPECs 2007-S17, 2007-S18 & 2007-S26 -- 2007 SJ, 2007 RW19, 2007 RU17, 2007 E1
`987`	Isle of Man Obs. on the Isle of Man, 1 in MPEC 2007-S26 -- 2007 G1
`J44`	Iturrieta Obs. in Spain, 1 in MPEC 2007-S26 -- 50P
`415`	Kambah Obs. in Australia, 6 in MPECs 2007-S21 & 2007-S26 -- 2007 Q2, 2007 H1, 2006 U6, 136P, 113P, 46P
`400`	Kitami Obs. in Japan, 1 in MPEC 2007-S19 -- 2007 N3
`704`	LINEAR in New Mexico, 18 in MPECs 2007-S17, 2007-S18, 2007-S19, 2007-S23, 2007-S24, 2007-S26 & 2007-S28 -- 2007 SJ, 2007 SH, 2007 RU9, 2007 RT19, 2007 RP15, 2007 R2, 2007 R1, 2007 O1, 2007 N3, 2007 E1, 2006 S5, 2006 OF2, 1988 PA, 188P, 136P, 128P, 113P, 29P
`699`	LONEOS in Arizona, 5 in MPECs 2007-S23 & 2007-S26 -- 2007 R1, 2006 S3, 2006 OF2, 139P, 113P
`J76`	La Murta Obs. in Spain, 3 in MPEC 2007-S26 -- 2007 G1, 2006 OF2, 2005 L3
`540`	Linz Obs. in Austria, 1 in MPEC 2007-S18 -- 2007 RP9
`D35`	Lulin Minor Bodies Tracking in Taiwan, 1 in MPEC 2007-S23 -- 2007 R1
`130`	Lumezzane Obs. in Italy, 6 in MPECs 2007-S19 & 2007-S26 -- 2007 N3, 2007 H1, 2006 OF2, 2005 S4, 93P, 17P
`232`	Masquefa Obs. in Spain, 5 in MPEC 2007-S26 -- 2007 M3, 2007 H1, 2006 OF2, 93P, 50P
`A06`	Mataro Obs. in Spain, 3 in MPEC 2007-S26 -- 2006 OF2, 2005 L3, 93P
`J46`	Montana Blanca Obs. in the Canary Islands, 2 in MPEC 2007-S26 -- 188P, 46P
`J45`	Montana Cabreja Obs. in the Canary Islands, 2 in MPEC 2007-S26 -- 2007 H1, 2006 OF2
`213`	Montcabre Obs. in Spain, 6 in MPEC 2007-S26 -- 2007 M3, 2007 G1, 2006 S3, 2006 OF2, 2005 L3, 188P
`945`	Monte Deva Obs. in Spain, 4 in MPEC 2007-S26 -- 2007 H1, 2007 G1, 2005 L3, 93P
`900`	Moriyama Obs. in Japan, 12 in MPECs 2007-S23 & 2007-S26 -- 2007 R1, 2007 N1, 2007 H1, 2006 U6, 2006 S5, 2006 OF2, 2006 M1, 2006 K1, 188P, 136P, 93P, 50P
`G96`	Mt. Lemmon Survey in Arizona, 7 in MPECs 2007-S18, 2007-S19, 2007-S24 & 2007-S26 -- 2007 R2, 2007 N3, 1999 TL12, 1999 SO5, 4486, 139P, 113P
`J47`	Nazaret Obs. in Spain, 6 in MPECs 2007-S19, 2007-S21, 2007-S24, 2007-S25 & 2007-S26 -- 2007 R3, 2007 R2, 2007 Q2, 2007 N3, 2006 OF2, 188P
`A24`	New Millennium Obs. in Italy, 8 in MPECs 2007-S18 & 2007-S26 -- 2007 PE8, 2007 LR32, 2005 S4, 2002 NN4, 16636, 188P, 139P, 117P
`423`	North Ryde Obs. in New South Wales, 4 in MPECs 2007-S19, 2007-S22 & 2007-S26 -- 2007 Q3, 2007 N3, 2006 U6, 46P
`586`	Pic du Midi Obs. in France, 1 in MPEC 2007-S26 -- 139P
`J53`	Posadas Obs. in Spain, 1 in MPEC 2007-S26 -- 2006 OF2
`H06`	RAS Obs. Mayhill in New Mexico, 2 in MPEC 2007-S26 -- 93P, 50P
`473`	Remanzacco Obs. in Italy, 5 in MPECs 2007-S17, 2007-S19, 2007-S21, 2007-S24 & 2007-S26 -- 2007 SJ, 2007 R2, 2007 Q2, 2007 N3, 2006 OF2
`939`	Rodeno Obs. in Spain, 6 in MPEC 2007-S26 -- 2007 M3, 2007 H1, 2007 G1, 2005 L3, 188P, 93P
`B04`	Saint-Barthelemy Obs. in Italy, 2 in MPECs 2007-S17 & 2007-S18 -- 2007 SJ, 2007 RY19
`204`	Schiaparelli Obs. in Italy, 5 in MPECs 2007-S24 & 2007-S26 -- 2007 R2, 2007 O1, 2007 K1, 2005 Q1, 113P
`E12`	Siding Spring Survey in New South Wales, 3 in MPECs 2007-S18 & 2007-S26 -- 2006 K1, 2001 RY47, 46P
`510`	Siegen Obs. in Germany, 1 in MPEC 2007-S26 -- 93P
`691`	Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2007-S18 & 2007-S21 -- 2007 RY8, 2007 RS12, 2007 Q2, 2003 BT47, 2002 TD66, 154330
`291`	Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2007-S18 -- 2007 RQ9
`A97`	Stammersdorf Obs. in Austria, 2 in MPEC 2007-S26 -- 2007 H1, 2006 OF2
`673`	Table Mtn. Obs. in southern California, 2 in MPECs 2007-S21 & 2007-S26 -- 2007 Q2, 2007 O1
`6735`	Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2007-S28 -- 2007 RT19
`H47`	Vicksburg Obs. in Mississippi, 6 in MPEC 2007-S26 -- 2007 H1, 2006 OF2, 2005 S4, 2005 L3, 136P, 93P
`B42`	Vitebsk Obs. in Belarus, 6 in MPECs 2007-S21, 2007-S23 & 2007-S26 -- 2007 R1, 2007 Q2, 2007 H1, 2006 W3, 2006 OF2, 93P

Impact Risk Monitoring on 19 September '07

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2355 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 SJ	NEODyS	1354	2011-2089	43	6.03e-08	-2.41	-2.74	0	NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2007/09/17.183 to 2007/09/19.096."
2007 SJ	JPL	1353	2014-2106	25	2.6e-08	-3.03	-3.16	0	JPL: "Analysis based on 22 observations spanning 1.9134 days (2007-Sep-17.18208 to 2007-Sep-19.09543)." Diameter approximately 1.913 km. from mean, weighted H=16.2.

2007 RY19	NEODyS	1354	2016-2090	90	3.43e-05	-3.25	-3.83	0	NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2007/09/14.354 to 2007/09/19.070."
2007 RY19	JPL	1353	2016-2085	59	2.8e-05	-3.35	-3.96	0	JPL: "Analysis based on 23 observations spanning 4.7161 days (2007-Sep-14.35284 to 2007-Sep-19.0689)." Diameter approximately 0.110 km. from mean, weighted H=22.4.

2007 RU9	NEODyS	1524	2018-2030	2	3.85e-07	-3.96	-3.96	0	NEODyS: "Based on 69 optical observations (of which 2 are rejected as outliers) from 2007/09/10.287 to 2007/09/18.229."
2007 RU9	JPL	1353	2020-2069	4	4.6e-07	-3.82	-4.01	0	JPL: "Analysis based on 67 observations spanning 7.9421 days (2007-Sep-10.28596 to 2007-Sep-18.22807)." Diameter approximately 0.228 km. from mean, weighted H=20.9.

2007 RT146	NEODyS	1354	2012-2090	43	5.18e-09	-4.88	-5.37	0	NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2007/09/15.395 to 2007/09/18.418."

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 19 September '07

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

2258	Grabbed MPEC 2007-S27 - 2003 SR422 - see above Grabbed MPEC 2007-S28 - 2007 RT19 - see above Grabbed MPEC 2007-S29 - 2004 VN112 - see above
1614	Grabbed MPEC 2007-S24 - Comet P/2007 R2 (Gibbs) - see above Grabbed MPEC 2007-S25 - Comet P/2007 R3 (Gibbs) - see above Grabbed MPEC 2007-S26 - Observations of Comets - see above
1524	Noted that NEODyS has updated its 2007 RU9 risk assessment - see above Grabbed MPEC 2007-S19 - Comet C/2007 N3 (Lulin) - see above Grabbed MPEC 2007-S20 - Comet C/2007 Q1 (Garradd) - see above Grabbed MPEC 2007-S21 - Comet P/2007 Q2 (Gilmore) - see above Grabbed MPEC 2007-S22 - Comet C/2007 Q3 (Siding Spring) - see above Grabbed MPEC 2007-S23 - Comet P/2007 R1 (Larson) - see above
1354	Noted that NEODyS has updated its 2007 RY19 risk assessment - see above Grabbed MPEC 2007-S18 - Daily Orbit Update - see above
1353	Noted that NEODyS has posted 2007 RT146 as an impact risk - see above Noted that JPL has updated its 2007 RU9 risk assessment - see above Noted that JPL has updated its 2007 RY19 risk assessment - see above Noted that JPL has posted 2007 SJ as an impact risk - see above Noted that NEODyS has posted 2007 SJ as an impact risk - see above
0503	Grabbed MPEC 2007-S17 - 2007 SJ - see above

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