2009-03-28 Tracking News

Contents on 28 March '09

IAU Minor Planet Center
- NEOCP Activity -- two listings: 2 updated
- New MPECs -- four MPECs
Observers -- eighteen 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 28 March '09

The MPC's NEO Confirmation Page has 2 listings: 2 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two updated listings. Both of these were "one nighters." So far The Tracking News has counted a total of eight listings 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 28 March '09

Minor Planet Electronic Circulars

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

MPEC 2009-F91 time-stamped "06:12 UT" - Daily Orbit Update - see below
MPEC 2009-F92 time-stamped "18:08 UT" - 2009 FJ30 - see below
MPEC 2009-F93 time-stamped "18:44 UT" - 2009 FU30 - see below
MPEC 2009-F94 time-stamped "22:09 UT" - 2009 FR30

MPEC 2009-F94 - "22:09 UT" - 2009 FR30

K09F30R 2009 FR30 (H=21.0 ~214m) was discovered at 1028 UT on 26 March by the Spacewatch 0.9m telescope, which observed it at March 26.44-47p3. The discovery was confirmed by the Spacewatch 1.8m telescope (March 27.46-47p3 at V=21.8-22.7 & 28.36-37p3).

MPEC 2009-F93 - "18:44 UT" - 2009 FU30

K09F30U 2009 FU30 (small asteroid, Earth MOID=3.9 LD, H=24.6 ~41m) was discovered at 0637 UT on 28 March by the Catalina Sky Survey (CSS), which observed it at March 28.28-29p4, 28.37p4, and 28.48-49p4. The discovery was confirmed by the Mt. Lemmon Survey (MLS) (March 28.48p4) and Cristovao Jacques via RAS Obs. Moorook (March 28.57p3). This object will be coming within ten lunar distances (LD) of Earth, reaching 8.8 LD on 2 April.

MPEC 2009-F92 - "18:08 UT" - 2009 FJ30

K09F30J 2009 FJ30 (small asteroid, Earth MOID=2.1 LD, H=22.4 ~112m) was discovered at 0942 UT on 27 March by MLS, which observed it at March 27.40-43p4. The discovery was confirmed by Great Shefford Obs. (March 28.05-08p3), Spacewatch 1.8m (March 28.31-32p3), and McDonald Obs. (March 28.33-35p3). This object will be coming within ten lunar distances (LD) of Earth, reaching 9.0 LD on 21 April.

<< DOU on 28 Mar. '09 >> MPEC 2009-F91 - "06:12 UT" - Daily Orbit Update

Observations of risk-listed objects
K09F19G 2009 FG19 (i=55.3°, Q=5.202 AU, arc=6 days, H=17.9 ~891m) from Spacewatch 1.8m (March 27.35-36p2)
K09F00G 2009 FG (small asteroid, arc=11 days, H=25.5 ~27m) from Spacewatch 1.8m (March 27.33-34p3)
K09F00E 2009 FE (Q=4.069 AU, arc=11 days, H=21.3 ~186m) from Spacewatch 1.8m (March 27.49-50p3)
Observations of recently (no longer) risk-listed objects
K09F10Y 2009 FY10 (i=42.2°, arc=6 days, H=19.8 ~371m) from Spacewatch 1.8m (March 27.24p3 at V=21.4-22.2)
K09F01G 2009 FG1 (i=70.4°, arc=10 days, H=18.7 ~616m) from Santa Maria de Montmagastrell Obs. (March 27.01-04p3) and MLS (March 27.36-39p4)
K09D46L 2009 DL46 (arc=27 days, H=21.5 ~170m) from Spacewatch 1.8m (March 27.44p3)
K09D45A 2009 DA45 (small asteroid, arc=29 days, H=22.4 ~112m) from Spacewatch 1.8m (March 27.29-30p3 & 28.18-20p3)
Observations of small asteroids (H>22.0)
K09F10X 2009 FX10 (arc=7 days, H=24.3 ~47m) from Great Shefford Obs. (March 27.87-88p3)
K09F00D 2009 FD (arc=31 days, H=22.2 ~123m) from Hamamatsu-Yuto Obs. (March 25.60-61p3)
Observations of other objects
K09F28P 2009 FP28 (arc=2 days, H=20.8 ~234m) from Grove Creek Obs. (March 27.44p2)
K09F28O 2009 FO28 (arc=3 days, H=21.0 ~214m) from Doc Greiner Research Obs. (DGRO) (March 28.15-16p8)
K09F28N 2009 FN28 (arc=3 days, H=19.2 ~490m) from Spacewatch 1.8m (March 27.45-46p2)
K09F25L 2009 FL25 (arc=4 days, H=19.3 ~467m) from DGRO (March 28.17-18p8)
K09F19F 2009 FF19 (arc=7 days, H=21.3 ~186m) from Spacewatch 1.8m (March 27.38-39p3 at V=21.5-22.2 & 28.22-23p3 at V=20.9-21.1)
K09F00T 2009 FT (arc=9 days, H=19.0 ~537m) from Madonna di Dossobuono Obs. (March 26.94-95p3)
K09F00A 2009 FA (i=42.3°, Q=4.060 AU, arc=12 days, H=18.6 ~645m) from Hamamatsu-Yuto Obs. (March 25.50-53p3, 26.50p1, 26.59-61p3 & 27.47-50p6), Walnut Creek Obs. (March 27.18-19p3), and DGRO (March 28.09-10p6)
K09E03F 2009 EF3 (arc=12 days, H=21.5 ~170m) from Spacewatch 1.8m (March 27.31-32p3)
K09E00Z 2009 EZ (arc=25 days, H=20.5 ~269m) from the Siding Spring Survey (SSS) (March 27.61-64p3)
K09D46K 2009 DK46 (arc=27 days, H=18.2 ~776m) from Spacewatch 1.8m (March 27.32-33p3)
K09D01F 2009 DF1 (arc=36 days, H=20.5 ~269m) from Santa Maria de M. Obs. (March 27.18-20p3)
K09C05Q 2009 CQ5 (arc=42 days, H=17.7 ~977m) from Spacewatch 1.8m (March 28.12-13p3)
K09C05N 2009 CN5 (arc=41 days, H=20.0 ~339m) from Spacewatch 1.8m (March 27.27-28p2)
K08W60L 2008 WL60 (arc=124 days, H=18.0 ~851m) from Hamamatsu-Yuto Obs. (March 25.63-65p3, 26.72-75p5 & 27.72-74p8)
K07B02T 2007 BT2 (arc=3 opp, H=17.2 ~1.23 km) from Hamamatsu-Yuto Obs. (March 26.62-65p10 & 27.53-55p4)
K06E52V 2006 EV52 (arc=4 opp, H=16.9 ~1.41 km) from MLS (March 27.37-39p4)
K05YI0P 2005 YP180 (arc=3 opp, H=19.3 ~467m) from Spacewatch 1.8m (March 28.14-15p3)
K05S19G 2005 SG19 (Q=4.171 AU, arc=2 opp, H=16.6 ~1.62 km) from La Sagra Obs. (March 25.18-21p6) and Spacewatch 0.9m (March 27.35-39p3)
K04V00C 2004 VC (i=39.1°, arc=3 opp, H=18.7 ~616m) from Hamamatsu-Yuto Obs. (March 27.76-77p5)
K02E02Z 2002 EZ2 (arc=3 opp, H=20.0 ~339m) from Madonna di Dossobuono Obs. (March 26.92p3)
G2900 162900 2001 HG31 from San Benedetto Po Obs. (March 24.81p3)
E3651 143651 2003 QO104 from San Benedetto Po Obs. (March 24.84-85p5)
E1765 141765 2002 MP3 from Village-Neuf Obs. (2008 Dec. 27.85p1 & 2008 Dec. 27.91-08p6)
D6617 136617 1994 CC from SSS (March 27.75-78p3)
90367 90367 2003 LC5 from CSS (March 27.49-50p3)
32906 32906 1994 RH from SSS (March 27.66-69p3)
10302 10302 1989 ML from CSS (March 27.24-25p4)
08566 8566 1996 EN from San Benedetto Po Obs. (March 24.83p5)
07753 7753 1988 XB from MLS (March 27.26-29p3)
05620 5620 Jasonwheeler (1990 OA) from MLS (March 27.47-49p4)
01036 1036 Ganymed (1924 TD) from SSS (March 27.56-59p4) and Mt. Tuffley Obs. (March 28.00-02p3)

Observers on 28 March '09

Eighteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`703`	Catalina Sky Survey (CSS) in Arizona, 3 in MPECs 2009-F91 & 2009-F93 -- 2009 FU30, 90367, 10302
`H26`	Doc Greiner Research Obs. (DGRO) in Wisconsin, 3 in MPEC 2009-F91 -- 2009 FO28, 2009 FL25, 2009 FA
`J95`	Great Shefford Obs. in England, 2 in MPECs 2009-F91 & 2009-F92 -- 2009 FX10, 2009 FJ30
`E16`	Grove Creek Obs. in New South Wales, 1 in MPEC 2009-F91 -- 2009 FP28
`379`	Hamamatsu-Yuto Obs. in Japan, 5 in MPEC 2009-F91 -- 2009 FD, 2009 FA, 2008 WL60, 2007 BT2, 2004 VC
`J75`	La Sagra Obs. in Spain, 1 in MPEC 2009-F91 -- 2005 SG19
`560`	Madonna di Dossobuono Obs. in Italy, 2 in MPEC 2009-F91 -- 2009 FT, 2002 EZ2
`711`	McDonald Obs. in Texas, 1 in MPEC 2009-F92 -- 2009 FJ30
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2009-F91, 2009-F92 & 2009-F93 -- 2009 FU30, 2009 FJ30, 2009 FG1, 2006 EV52, 7753, 5620
`J93`	Mt. Tuffley Obs. in England, 1 in MPEC 2009-F91 -- 1036
`D90.`	Cristovao Jacques in Brazil via RAS Obs. Moorook in South Australia, 1 in MPEC 2009-F93 -- 2009 FU30
`434`	San Benedetto Po Obs. in Italy, 3 in MPEC 2009-F91 -- 162900, 143651, 8566
`B74`	Santa Maria de Montmagastrell Obs. in Spain, 2 in MPEC 2009-F91 -- 2009 FG1, 2009 DF1
`E12`	Siding Spring Survey (SSS) in New South Wales, 4 in MPEC 2009-F91 -- 2009 EZ, 32906, 136617, 1036
`691`	Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2009-F91 & 2009-F94 -- 2009 FR30, 2005 SG19
`291`	Spacewatch 1.8m telescope in Arizona, 15 in MPECs 2009-F91, 2009-F92 & 2009-F94 -- 2009 FY10, 2009 FR30, 2009 FN28, 2009 FJ30, 2009 FG19, 2009 FG, 2009 FF19, 2009 FE, 2009 EF3, 2009 DL46, 2009 DK46, 2009 DA45, 2009 CQ5, 2009 CN5, 2005 YP180
`138`	Village-Neuf Obs. in France, 1 in MPEC 2009-F91 -- 141765
`G56`	Walnut Creek Obs. in northern California, 1 in MPEC 2009-F91 -- 2009 FA

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

Impact Risk Monitoring on 28 March '09

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS at 2150 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.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few objects.
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

2009 FG19	JPL Sentry	2359	2022-2103	38	1.1e-07	-2.89	-3.31	0	JPL: "Analysis based on 44 observations spanning 5.9072 days (2009-Mar-21.44815 to 2009-Mar-27.35531)." Diameter approximately 0.820 km. from mean, weighted H=18.1.
2009 FG19	NEODyS	1540	2022-2087	37	1.01e-07	-2.90	-3.31	0	NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2009/03/21.449 to 2009/03/27.356."

2009 FG	JPL Sentry	2359	2022-2103	29	6.7e-06	-5.58	-6.18	0	JPL: "Analysis based on 53 observations spanning 10.943 days (2009-Mar-16.3986 to 2009-Mar-27.34187)." Diameter approximately 0.027 km. from mean, weighted H=25.5.
2009 FG	NEODyS	1540	2036-2087	23	4.7e-06	-5.75	-6.19	0	NEODyS: "Based on 53 optical observations (of which 0 are rejected as outliers) from 2009/03/16.399 to 2009/03/27.343."

2009 FE	JPL Sentry	2359	2044-2103	3	2.5e-06	-3.78	-3.80	0	JPL: "Analysis based on 53 observations spanning 11.222 days (2009-Mar-16.27919 to 2009-Mar-27.5007)." Diameter approximately 0.181 km. from mean, weighted H=21.3.
2009 FE	NEODyS	1540	2044-2089	2	2.45e-06	-3.77	-3.77	0	NEODyS: "Based on 53 optical observations (of which 0 are rejected as outliers) from 2009/03/16.280 to 2009/03/27.501."

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 28 March '09

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

2358	Noted that JPL Sentry has updated its 2009 FE risk assessment - see above Noted that JPL Sentry has updated its 2009 FG risk assessment - see above Noted that JPL Sentry has updated its 2009 FG19 risk assessment - see above
2224	Grabbed MPEC 2009-F94 - 2009 FR30 - see above
1848	Grabbed MPEC 2009-F93 - 2009 FU30 - see above
1816	Grabbed MPEC 2009-F92 - 2009 FJ30 - see above
1540	Noted that NEODyS has updated its 2009 FE risk assessment - see above Noted that NEODyS has updated its 2009 FG risk assessment - see above Noted that NEODyS has updated its 2009 FG19 risk assessment - see above
0755	Grabbed MPEC 2009-F91 - Daily Orbit Update - see above

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