25 Sep '07 Tracking News

Contents on 25 September '07

IAU Minor Planet Center
- NEOCP Activity -- four listings: 4 new
- New MPECs -- ten MPECs
- Observers -- 48 observing facilities
Impact Risk Monitoring -- two objects reported
Chronology

Resources:

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

Notes: Due to travel, these pages will update irregularly for the rest of the month.
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 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 25 September '07

The MPC's NEO Confirmation Page has 4 listings: 4 new

When last checked at 1621 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new listings. Of these, three were "one nighters." So far Tracking News has counted a total of five 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 '07

Minor Planet Electronic Circulars

As of last check at 1621 UTC, there have been ten MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2007-S48 time-stamped "06:10 UT" - Daily Orbit Update - see below
MPEC 2007-S49 time-stamped "11:46 UT" - 2007 SG11 - see below
MPEC 2007-S50 time-stamped "15:29 UT" - Comet C/2007 N3 (Lulin) - see below
MPEC 2007-S51 time-stamped "15:34 UT" - Comet P/2007 Q2 (Gilmore) - see below
MPEC 2007-S52 time-stamped "15:37 UT" - Comet P/2007 R1 (Larson) - see below
MPEC 2007-S53 time-stamped "15:41 UT" - Comet P/2007 R2 (Gibbs) - see below
MPEC 2007-S54 time-stamped "15:44 UT" - Comet P/2007 R3 (Gibbs) - see below
MPEC 2007-S55 time-stamped "15:47 UT" - Comet P/2007 R4 (Garradd) - see below
MPEC 2007-S56 time-stamped "15:57 UT" - Comet P/2007 S1 (Zhao) - see below
MPEC 2007-S57 time-stamped "16:04 UT" - Observations of Comets

MPEC 2007-S57 - "16:04 UT" - Observations of Comets

PK07N010 P/2007 N1 (McNaught) from Lumezzane Obs. (Sept. 13.05-06p4), Ageo Obs. (Sept. 20.73-74p3), Vitebsk Obs. (Sept. 21.01-02p2), LINEAR (Sept. 21.34-39p5), and Kitami Obs. (Sept. 22.68-69p3)
CK07J21A C/2007 JA21 (LINEAR) from Buchloe Obs. (Sept. 12.85p1 & 20.80p1)
PK07H030 P/2007 H3 (Garradd) from the Siding Spring Survey (SSS) (Aug. 8.43p1) and Buchloe Obs. (Sept. 23.76p1)
PK07H010 P/2007 H1 (McNaught) from Atlante Obs. (Aug. 9.10-13p5), Village-Neuf Obs. (Sept. 16.03-05p4), Montana Cabreja Obs. (Sept. 16.07-09p2 & 19.04-06p2), Monte Deva Obs. (Sept. 19.94-95p5, 20.97-98p5 & 23.00-01p5), Nazaret Obs. (Sept. 19.96-98p3), Remanzacco Obs. (Sept. 19.99p1), RAS Obs. Mayhill (Sept. 20.35-36p2), Buchloe Obs. (Sept. 20.86p3), CAST Obs. (Sept. 20.88p1), Vitebsk Obs. (Sept. 20.91-92p5), Isle of Man Obs. (Sept. 21.98p2), and Vicksburg Obs. (Sept. 22.31p2)
CK07G010 C/2007 G1 (LINEAR) from Ageo Obs. (Sept. 16.46p2), Vitebsk Obs. (Sept. 18.77-78p2), LINEAR (Sept. 19.11-15p5), Buchloe Obs. (Sept. 20.81p3), Isle of Man Obs. (Sept. 21.91-92p4), and Siegen Obs. (Sept. 22.84p2 & 23.86p2)
CK07F010 C/2007 F1 (LONEOS) from Schiaparelli Obs. (July 25.86p1, Sept. 21.17p2 & 23.17p2), Ageo Obs. (Sept. 19.81-82p3 & 20.81p3), and Nagano Obs. (Sept. 20.81-82p2)
CK07E010 C/2007 E1 (Garradd) from LINEAR (Sept. 21.42-47p4 & 22.41-46p4)
CK06U060 C/2006 U6 (Spacewatch) from Schiaparelli Obs. (Sept. 20.06p1), Monte Deva Obs. (Sept. 20.07-08p5), Ageo Obs. (Sept. 20.70-71p3), and North Ryde Obs. (Sept. 24.57-60p2)
CK06S050 C/2006 S5 (Hill) from Village-Neuf Obs. (Sept. 16.12-13p2), Ageo Obs. (Sept. 16.77-80p2), RAS Mayhill (Sept. 20.38p2), Vitebsk Obs. (Sept. 21.04p3), and LINEAR (Sept. 21.41-47p4)
CK06O02F C/2006 OF2 (Broughton) from Montana Cabreja Obs. (Sept. 16.10-12p2), Vitebsk Obs. (Sept. 18.83p2 & 20.79-80p2), Siegen Obs. (Sept. 18.90-91p3), Guadarrama Obs. (Sept. 19.86-88p2), Monte Deva Obs. (Sept. 19.89-91p5 & 20.91-93p5), Hamamatsu-Yuto Obs. (Sept. 20.58p3 & 21.45-46p3), La Puebla de Vallbona Obs. (Vallbona Obs.) (Sept. 20.81-82p3), CAST Obs. (Sept. 20.85p1), Montana Blanca Obs. (Sept. 20.93p1), and Isle of Man Obs. (Sept. 21.95-96p3)
CK06K010 C/2006 K1 (McNaught) from Ageo Obs. (Sept. 7.76p1 & 20.77-78p2)
CK05S040 C/2005 S4 (McNaught) from New Millennium Obs. (Sept. 11.83-89p6), Ageo Obs. (Sept. 16.53-54p2), Buchloe Obs. (Sept. 20.83p1), Vicksburg Obs. (Sept. 22.10-12p2), and Remanzacco Obs. (Sept. 23.84p1)
CK05L030 C/2005 L3 (McNaught) from Siegen Obs. (Sept. 21.81-82p2 & 22.82-83p2)
CK05EH3L C/2005 EL173 (LONEOS) from Australian Natl. Univ. 1m telescope (Sept. 6.79-80p3) and North Ryde Obs. (Sept. 24.72-74p2)
0188P 188P/LINEAR-Mueller from New Millennium Obs. (Sept. 12.07-08p3), Kiev Comet Station (Sept. 17.98-99p2), LINEAR (Sept. 19.23-28p5 & 21.28-33p5), Vitebsk Obs. (Sept. 20.85-86p4), Monte Deva Obs. (Sept. 21.04-06p5 & 23.96-98p4), Vicksburg Obs. (Sept. 22.33-34p2), and Schiaparelli Obs. (Sept. 23.03p1 & 23.11p1)
0156P 156P/Russell-LINEAR from the Mt. Lemmon Survey (MLS) (Sept. 11.49-51p4) and Vitebsk Obs. (Sept. 21.08p1)
0139P 139P/Vaisala-Oterma from Vitebsk Obs. (Sept. 20.93p1) and LINEAR (Sept. 21.40-45p4 & 22.29-39p10)
0136P 136P/Mueller 3 from LONEOS (Sept. 18.25-32p4) and Schiaparelli Obs. (Sept. 23.03p1)
0117P 117P/Helin-Roman-Alu 1 from LINEAR (Sept. 18.30-34p4 & 22.35-40p4), LONEOS (Sept. 18.34-38p3), and Schiaparelli Obs. (Sept. 21.10p1, 21.16p1, 23.06p1 & 23.13p1)
0113P 113P/Spitaler from LINEAR (Sept. 19.23-28p5 & 21.28-33p4) and Vitebsk Obs. (Sept. 20.89p2)
0110P 110P/Hartley 3 from Moriyama Obs. (Sept. 16.78-79p2), RAS Mayhill (Sept. 22.36p2), and LINEAR (Sept. 22.41-45p4)
0108P 108P/Ciffreo from Vitebsk Obs. (Sept. 11.08p1), LINEAR (Sept. 21.42-47p4), and Ageo Obs. (Sept. 21.81p2)
0093P 93P/Lovas 1 from Homburg-Erbach Obs. (Sept. 15.94p1, 21.95p1 & 22.00p1), Village-Neuf Obs. (Sept. 16.06-08p3), Vitebsk Obs. (Sept. 18.84-86p5 & 20.95-96p3), Siegen Obs. (Sept. 18.93-94p3, 21.94p3 & 22.92p3), Chante-Perdrix Obs. (Sept. 19.83-84p4), Guadarrama Obs. (Sept. 19.91-92p3), Nazaret Obs. (Sept. 19.94-96p4), Monte Deva Obs. (Sept. 19.96-97p5, 21.01-02p5, 22.95-96p5 & 23.99-00p5), Nagano Obs. (Sept. 20.64p4), Hamamatsu-Yuto Obs. (Sept. 20.65-66p4 & 21.63-64p3), Vallbona Obs. (Sept. 20.84-85p3), Buchloe Obs. (Sept. 20.85p3), CAST Obs. (Sept. 20.86p1), Isle of Man Obs. (Sept. 22.06-09p4), Vicksburg Obs. (Sept. 22.29-30p2), and Schiaparelli Obs. (Sept. 23.11p1 & 23.16p1)
0074P 74P/Smirnova-Chernykh from LINEAR (Sept. 16.41-46p5 & 19.38-41p3)
0050P 50P/Arend from Village-Neuf Obs. (Sept. 16.09-11p3), Kiev Comet Station (Sept. 18.10-11p2), Vitebsk Obs. (Sept. 18.87-88p2 & 20.97-98p2), Siegen Obs. (Sept. 18.97p3, 21.92-93p3 & 22.93p2), Chante-Perdrix Obs. (Sept. 19.87-88p3), Monte Deva Obs. (Sept. 19.98-99p5, 22.97-99p3 & 24.01-02p3), Nazaret Obs. (Sept. 19.00-02p3), the Catalina Sky Survey (CSS) (Sept. 20.36-38p4), CAST Obs. (Sept. 20.86p1), Isle of Man Obs. (Sept. 22.06p2), and LINEAR (Sept. 22.36-38p3)
0029P 29P/Schwassmann-Wachmann 1 from Nagano Obs. (Sept. 20.76-77p4), Gualba Obs. (Sept. 21.17p4), and Monte Deva Obs. (Sept. 24.05-06p4)
0017P 17P/Holmes from Siegen Obs. (Sept. 19.01p3) and Vitebsk Obs. (Sept. 21.05-06p2)
0008P 8P/Tuttle from Ageo Obs. (Sept. 16.57-58p3) and Siegen Obs. (Sept. 21.91p2 & 22.95-96p2)

MPEC 2007-S56 - "15:57 UT" - Comet P/2007 S1 (Zhao)

PK07S010 P/2007 S1 (q=2.498 AU, Q=5.125 AU, TP=2007 Dec. 11.231 TT) from Purple Mtn. Obs. XuYi Station (Sept. 21.68-71p8), Ageo Obs. (Sept. 21.69-70p2), Kiev Comet Station (Sept. 21.95-99p4), and Astronomical Research Obs. (ARO) (Sept. 23.24-25p3)

MPEC 2007-S55 - "15:47 UT" - Comet P/2007 R4 (Garradd)

PK07R040 P/2007 R4 (Garradd) (q=1.921 AU, Q=9.764 AU, TP=2007 Sept. 27.325 TT) from Kambah Obs. (Sept. 18.74p2) and Schiaparelli Obs. (Sept. 23.08p1)

MPEC 2007-S54 - "15:44 UT" - Comet P/2007 R3 (Gibbs)

PK07R030 P/2007 R3 (Gibbs) (q=2.234 AU, Q=7.163 AU, TP=2007 June 7.569 TT) from LINEAR (Sept. 19.23-28p4), the Spacewatch 0.9m telescope (Sept. 19.35-38p3), Schiaparelli Obs. (Sept. 19.00p1 & 20.12p1), Ageo Obs. (Sept. 20.66-67p3), and Buchloe Obs. (Sept. 20.85p1)

MPEC 2007-S53 - "15:41 UT" - Comet P/2007 R2 (Gibbs)

PK07R020 P/2007 R2 (Gibbs) (Q=5.398 AU, TP=2007 Aug. 26.573 TT) from Kiev Comet Station (Sept. 18.07-09p5), LINEAR (Sept. 19.31-33p3), and Vitebsk Obs. (Sept. 20.99p2)

MPEC 2007-S52 - "15:37 UT" - Comet P/2007 R1 (Larson)

PK07R010 P/2007 R1 (Larson) (q=4.306 AU, Q=7.897 AU, TP=2007 July 8.634 TT) from Kiev Comet Station (Sept. 17.94-96p4) and LINEAR (Sept. 19.23-28p3)

MPEC 2007-S51 - "15:34 UT" - Comet P/2007 Q2 (Gilmore)

PK07Q020 P/2007 Q2 (Gilmore) (q=1.840 AU, Q=9.378 AU, TP=2007 Aug. 23.884 TT) from Kiev Comet Station (Sept. 17.00-02p5), LINEAR (Sept. 19.17-22p3), Spacewatch 0.9m (Sept. 19.18-21p3), and Ageo Obs. (Sept. 20.62p2)

MPEC 2007-S50 - "15:29 UT" - Comet C/2007 N3 (Lulin)

CK07N030 C/2007 N3 (Lulin) (i=178.4°, Q=6026.788 AU, TP=2009 Jan. 10.65289 TT) from Lumezzane Obs. (Sept. 15.90-91p4), LINEAR (Sept. 19.11-16p5), and Vitebsk Obs. (Sept. 20.82-83p2)

MPEC 2007-S49 - "11:46 UT" - 2007 SG11

K07S11G 2007 SG11 (small asteroid, H=22.7 ~98m) was discovered at 0646 UT 24 Sept. by LINEAR, which observed it at Sept. 24.28-33p4. The discovery was confirmed by Great Shefford Obs. (Sept. 25.12-13p4), Jim Young via Table Mtn. Obs. (Sept. 25.17-19p4), Sandlot Obs. (Sept. 25.20-22p5), and MLS (Sept. 25.25-26p4).

<< DOU on 25 Sept. '07 >> MPEC 2007-S48 - "06:10 UT" - Daily Orbit Update

Observations of risk-listed objects
K07S06N 2007 SN6 (small asteroid, arc=5 days, H=25.1 ~32m) from the Spacewatch 1.8m telescope (Sept. 24.32-33p3)
K07R19Y 2007 RY19 (small asteroid, arc=11 days, H=22.5 ~107m) from Great Shefford Obs. (Sept. 25.16-17p3)
Observations of recently (no longer) risk-listed objects
K07R02F 2007 RF2 (arc=20 days, H=20.7 ~245m) from Great Shefford Obs. (Sept. 25.18p4)
Observations of small asteroids (H>22.0)
K07S06O 2007 SO6 (arc=2 days, H=25.2 ~31m) from SSS (Sept. 22.64p1)
K07S01U 2007 SU1 (arc=6 days, H=25.5 ~27m) from SSS (Sept. 22.52-53p2), LINEAR (Sept. 24.28-33p5), Linz Obs. (Sept. 24.76-77p5), and Alter Satzberg Obs. (Sept. 24.90-91p7)
K07S01S 2007 SS1 (arc=3 days, H=23.6 ~65m) from SSS (Sept. 22.78p2)
K07RE6S 2007 RS146 (arc=8 days, H=23.3 ~74m) from Tiki Obs. (Sept. 23.54-56p2)
K07P09Q 2007 PQ9 (arc=43 days, H=22.1 ~129m) from SSS (Sept. 22.77-78p2)
Observations of other objects
K07S06P 2007 SP6 (arc=2 days, H=18.0 ~851m) from SSS (Sept. 22.75-76p2)
K07S02W 2007 SW2 (arc=5 days, H=21.3 ~186m) from Alter Satzberg Obs. (Sept. 24.96-00p4)
K07S01R 2007 SR1 (arc=6 days, H=19.6 ~407m) from Spacewatch 1.8m (Sept. 24.35-36p3)
K07RD3M 2007 RM133 (arc=9 days, H=18.3 ~741m) from Hibiscus Obs. (Sept. 23.60-61p2)
K07R19T 2007 RT19 (arc=10 days, H=18.1 ~812m) from LINEAR (Sept. 24.36-40p3)
K07R17W 2007 RW17 (arc=9 days, H=21.3 ~186m) from SSS (Sept. 22.51-52p2)
K07R12R 2007 RR12 (arc=13 days, H=19.8 ~371m) from LINEAR (Sept. 24.28-33p9) and Alter Satzberg Obs. (Sept. 24.93-95p13)
K07R07N 2007 RN7 (arc=30 days, H=21.4 ~178m) from SSS (Sept. 22.64p2)
K07O00Y 2007 OY (arc=67 days, H=20.8 ~234m) from Hibiscus Obs. (Sept. 23.56-60p3)
K07L32R 2007 LR32 (arc=120 days, H=17.2 ~1.23 km) from LINEAR (Sept. 22.23-28p5)
K07D41L 2007 DL41 (arc=2 opp, H=20.6 ~257m) from Spacewatch 1.8m (Sept. 24.39-40p3)
K06S06F 2006 SF6 (arc=2 opp, H=20.0 ~339m) from Spacewatch 1.8m (Sept. 24.37-38p3)
K03U22D 2003 UD22 (arc=2 opp, H=19.7 ~389m) from Spacewatch 1.8m (Sept. 24.49-50p3)
K03SM2W 2003 SW222 (arc=3 opp, H=17.2 ~1.23 km) from Madonna di Dossobuono Obs. (Sept. 23.82p3)
K01R12C 2001 RC12 (Q=5.291 AU, arc=3 opp, H=15.8 ~2.34 km, q=1.167 AU) from Tiki Obs. (Sept. 23.61-62p2)
K01Q34C 2001 QC34 (arc=2 opp, H=20.0 ~339m) from Madonna di Dossobuono Obs. (Sept. 23.84-85p3)
86324 86324 1999 WA2 from Siegen Obs. (Sept. 23.88-89p3) and LINEAR (Sept. 24.12-16p4)

Observers on 25 September '07

A total of 48 observing facilities appear in today's MPECs.

Code	Observer / observatory
`349`	Ageo Obs. in Japan, 12 in MPECs 2007-S51, 2007-S54, 2007-S56 & 2007-S57 -- P/2007 S1, P/2007 R3, P/2007 Q2, P/2007 N1, C/2007 G1, C/2007 F1, C/2006 U6, C/2006 S5, C/2006 K1, C/2005 S4, 108P, 8P
`B03`	Alter Satzberg Obs. in Austria, 3 in MPEC 2007-S48 -- 2007 SW2, 2007 SU1, 2007 RR12
`H55`	Astronomical Research Obs. in Illinois, 1 in MPEC 2007-S56 -- P/2007 S1
`J51`	Atlante Obs. in the Canary Islands, 1 in MPEC 2007-S57 -- P/2007 H1
`413`	Australian Natl. Univ. 1m telescope in New South Wales, 1 in MPEC 2007-S57 -- C/2005 EL173
`215`	Buchloe Obs. in Germany, 7 in MPECs 2007-S54 & 2007-S57 -- P/2007 R3, C/2007 JA21, P/2007 H3, P/2007 H1, C/2007 G1, C/2005 S4, 93P
`235`	CAST Obs. in Italy, 4 in MPEC 2007-S57 -- P/2007 H1, C/2006 OF2, 93P, 50P
`703`	Catalina Sky Survey in Arizona, 1 in MPEC 2007-S57 -- 50P
`A77`	Chante-Perdrix Obs. in France, 2 in MPEC 2007-S57 -- 93P, 50P
`J95`	Great Shefford Obs. in England, 3 in MPECs 2007-S48 & 2007-S49 -- 2007 SG11, 2007 RY19, 2007 RF2
`458`	Guadarrama Obs. in Spain, 2 in MPEC 2007-S57 -- C/2006 OF2, 93P
`442`	Gualba Obs. in Spain, 1 in MPEC 2007-S57 -- 29P
`379`	Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2007-S57 -- C/2006 OF2, 93P
`F84`	Hibiscus Obs. in Tahiti, 2 in MPEC 2007-S48 -- 2007 RM133, 2007 OY
`196`	Homburg-Erbach Obs. in Germany, 1 in MPEC 2007-S57 -- 93P
`987`	Isle of Man Obs. on the Isle of Man, 5 in MPEC 2007-S57 -- P/2007 H1, C/2007 G1, C/2006 OF2, 93P, 50P
`415`	Kambah Obs. in Australia, 1 in MPEC 2007-S55 -- P/2007 R4
`585`	Kiev Comet Station in the Ukraine, 6 in MPECs 2007-S51, 2007-S52, 2007-S53, 2007-S56 & 2007-S57 -- P/2007 S1, P/2007 R2, P/2007 R1, P/2007 Q2, 188P, 50P
`400`	Kitami Obs. in Japan, 1 in MPEC 2007-S57 -- P/2007 N1
`704`	LINEAR in New Mexico, 23 in MPECs 2007-S48, 2007-S49, 2007-S50, 2007-S51, 2007-S52, 2007-S53, 2007-S54 & 2007-S57 -- 2007 SU1, 2007 SG11, 2007 RT19, 2007 RR12, P/2007 R3, P/2007 R2, P/2007 R1, P/2007 Q2, C/2007 N3, P/2007 N1, 2007 LR32, C/2007 G1, C/2007 E1, C/2006 S5, 86324, 188P, 139P, 117P, 113P, 110P, 108P, 74P, 50P
`699`	LONEOS in Arizona, 2 in MPEC 2007-S57 -- 136P, 117P
`J67`	La Puebla de Vallbona Obs. in Spain, 2 in MPEC 2007-S57 -- C/2006 OF2, 93P
`540`	Linz Obs. in Austria, 1 in MPEC 2007-S48 -- 2007 SU1
`130`	Lumezzane Obs. in Italy, 2 in MPECs 2007-S50 & 2007-S57 -- C/2007 N3, P/2007 N1
`560`	Madonna di Dossobuono Obs. in Italy, 2 in MPEC 2007-S48 -- 2003 SW222, 2001 QC34
`J46`	Montana Blanca Obs. in the Canary Islands, 1 in MPEC 2007-S57 -- C/2006 OF2
`J45`	Montana Cabreja Obs. in the Canary Islands, 2 in MPEC 2007-S57 -- P/2007 H1, C/2006 OF2
`945`	Monte Deva Obs. in Spain, 7 in MPEC 2007-S57 -- P/2007 H1, C/2006 U6, C/2006 OF2, 188P, 93P, 50P, 29P
`900`	Moriyama Obs. in Japan, 1 in MPEC 2007-S57 -- 110P
`G96`	Mt. Lemmon Survey in Arizona, 2 in MPECs 2007-S49 & 2007-S57 -- 2007 SG11, 156P
`D81`	Nagano Obs., 3 in MPEC 2007-S57 -- C/2007 F1, 93P, 29P
`J47`	Nazaret Obs. in Spain, 3 in MPEC 2007-S57 -- P/2007 H1, 93P, 50P
`A24`	New Millennium Obs. in Italy, 2 in MPEC 2007-S57 -- C/2005 S4, 188P
`423`	North Ryde Obs. in New South Wales, 2 in MPEC 2007-S57 -- C/2006 U6, C/2005 EL173
`D29`	Purple Mtn. Obs. XuYi Station in China, 1 in MPEC 2007-S56 -- P/2007 S1
`H06`	RAS Obs. Mayhill in New Mexico, 3 in MPEC 2007-S57 -- P/2007 H1, C/2006 S5, 110P
`473`	Remanzacco Obs. in Italy, 2 in MPEC 2007-S57 -- P/2007 H1, C/2005 S4
`H36`	Sandlot Obs. in Kansas, 1 in MPEC 2007-S49 -- 2007 SG11
`204`	Schiaparelli Obs. in Italy, 8 in MPECs 2007-S54, 2007-S55 & 2007-S57 -- P/2007 R4, P/2007 R3, C/2007 F1, C/2006 U6, 188P, 136P, 117P, 93P
`E12`	Siding Spring Survey in New South Wales, 8 in MPECs 2007-S48 & 2007-S57 -- 2007 SU1, 2007 SS1, 2007 SP6, 2007 SO6, 2007 RW17, 2007 RN7, 2007 PQ9, P/2007 H3
`510`	Siegen Obs. in Germany, 8 in MPECs 2007-S48 & 2007-S57 -- C/2007 G1, C/2006 OF2, C/2005 L3, 86324, 93P, 50P, 17P, 8P
`691`	Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2007-S51 & 2007-S54 -- P/2007 R3, P/2007 Q2
`291`	Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2007-S48 -- 2007 SR1, 2007 SN6, 2007 DL41, 2006 SF6, 2003 UD22
`6735`	Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2007-S49 -- 2007 SG11
`F85`	Tiki Obs. in Tahiti, 2 in MPEC 2007-S48 -- 2007 RS146, 2001 RC12
`H47`	Vicksburg Obs. in Mississippi, 4 in MPEC 2007-S57 -- P/2007 H1, C/2005 S4, 188P, 93P
`138`	Village-Neuf Obs. in France, 4 in MPEC 2007-S57 -- P/2007 H1, C/2006 S5, 93P, 50P
`B42`	Vitebsk Obs. in Belarus, 15 in MPECs 2007-S50, 2007-S53 & 2007-S57 -- P/2007 R2, C/2007 N3, P/2007 N1, P/2007 H1, C/2007 G1, C/2006 S5, C/2006 OF2, 188P, 156P, 139P, 113P, 108P, 93P, 50P, 17P

Impact Risk Monitoring on 25 September '07

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 1621 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 SN6	JPL	1416	2022-2059	2	3.3e-06	-4.91	-5.03	0	JPL: "Analysis based on 18 observations spanning 5.0433 days (2007-Sep-19.28894 to 2007-Sep-24.33219)." Diameter approximately 0.035 km. from mean, weighted H=24.9.
2007 SN6	NEODyS	1416	2022-2085	4	3.83e-06	-4.81	-4.89	0	NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2007/09/19.290 to 2007/09/24.333."

2007 RY19	JPL	1416	2024-2106	40	6.5e-05	-3.26	-3.80	0	JPL: "Analysis based on 40 observations spanning 10.813 days (2007-Sep-14.35284 to 2007-Sep-25.16566)." Diameter approximately 0.110 km. from mean, weighted H=22.5.

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 25 September '07

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

1622

Grabbed MPEC 2007-S50 - Comet C/2007 N3 (Lulin) - see above
Grabbed MPEC 2007-S51 - Comet P/2007 Q2 (Gilmore) - see above
Grabbed MPEC 2007-S52 - Comet P/2007 R1 (Larson) - see above
Grabbed MPEC 2007-S53 - Comet P/2007 R2 (Gibbs) - see above
Grabbed MPEC 2007-S54 - Comet P/2007 R3 (Gibbs) - see above
Grabbed MPEC 2007-S55 - Comet P/2007 R4 (Garradd) - see above
Grabbed MPEC 2007-S56 - Comet P/2007 S1 (Zhao) - see above
Grabbed MPEC 2007-S57 - Observations of Comets - see above

1416

Noted that JPL has updated its 2007 RY19 risk assessment - see above
Noted that JPL has updated its 2007 SN6 risk assessment - see above
Noted that NEODyS has updated its 2007 SN6 risk assessment - see above
Grabbed MPEC 2007-S48 - Daily Orbit Update - see above
Grabbed MPEC 2007-S49 - 2007 SG11 - see above

http://www.HohmannTransfer.com/mn/07/07268_0925.htm
Publisher information, privacy statement, and disclaimer.
This page is © Copyright 2007 Columbine, Inc. - All Rights Reserved
Any mentioned trademarks are the property of their respective owners.
Various tabular formats and data used on this page are acknowledged as belonging to JPL, MPC, NEODyS, and/or others.
Do NOT copy, mirror, or embed this page, but you are welcome to link to it, and you may embed the RSS news feed. All information here is subject to very frequent change during the day of news compilation. Individuals may make copies for their own private, non-commercial use. Please report broken links or other problems with this page to <webmaster@hohmanntransfer.com> (HTML 4.01 validation).
Important news updates are flagged by A/CC's RSS news feed (link).