2009-01-31 Tracking News

Contents on 31 January '09

IAU Minor Planet Center
- NEOCP Activity -- five listings: 2 new, 3 updated
- New MPECs -- five MPECs
Observers -- 27 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.

NEOCP Activity on 31 January '09

The MPC's NEO Confirmation Page has 5 listings: 2 new, 3 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and three updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of eleven 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 31 January '09

Minor Planet Electronic Circulars

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

MPEC 2009-B89 time-stamped "00:02 UT" - 2009 BL71 - see below
MPEC 2009-B90 time-stamped "07:06 UT" - Daily Orbit Update - see below
MPEC 2009-B91 time-stamped "16:30 UT" - Comet C/2009 B2 (LINEAR) - see below
MPEC 2009-B92 time-stamped "16:56 UT" - 2009 BD77 - see below
MPEC 2009-B93 time-stamped "16:59 UT" - 2009 BE77

MPEC 2009-B93 - "16:59 UT" - 2009 BE77

K09B77E 2009 BE77 (Q=4.157 AU, H=18.1 ~812m) was discovered at 1324 UT on 30 Jan. by the Siding Spring Survey (SSS), which observed it at Jan. 30.56-61p5, 31.43p2, and 31.55-56p2. The discovery was confirmed by Calar Alto Obs. (Jan. 30.80p3), Schiaparelli Obs. (Jan. 30.86p1), Astronomical Research Obs. (ARO) (Jan. 31.07p3), the Spacewatch 1.8m telescope (Jan. 31.10-11p3), Jim Young via Table Mtn. Obs. (Jan. 31.11-13p4), Desert Moon Obs. (Jan. 31.16-19p3), and Mt. John Obs. (Jan. 31.49p5).

MPEC 2009-B92 - "16:56 UT" - 2009 BD77

K09B77D 2009 BD77 (H=20.3 ~295m) was discovered at 1252 UT on 30 Jan. by the Catalina Sky Survey (CSS), which observed it at Jan. 30.54-55p4. The discovery was confirmed by Saint-Barthelemy Obs. (Jan. 30.99-01p3), Schiaparelli Obs. (Jan. 31.19-20p3), Sandlot Obs. (Jan. 31.44-45p4), Young/Table Mtn. (Jan. 31.49-50p4), and Desert Moon Obs. (Jan. 31.49-51p3).

MPEC 2009-B91 - "16:30 UT" - Comet C/2009 B2 (LINEAR)

CK09B020 C/2009 B2 (LINEAR) (i=157.0°, q=2.328 AU, TP=2009 Mar. 10.773 TT) from LINEAR (Jan. 29.47-51p4), Calar Alto Obs. (Jan. 30.16-17p3), RAS Obs. Mayhill (Jan. 30.47-49p3 & 31.48-49p3), Grove Creek Obs. (Jan. 30.74-75p2), Sandlot Obs. (Jan. 31.46-48p2), Table Mtn. Obs. (Jan. 31.50-55p4), the Spacewatch 0.9m telescope (Jan. 31.53-55p3), and Desert Moon Obs. (Jan. 31.53-54p3)

<< DOU on 31 Jan. '09 >> MPEC 2009-B90 - "07:06 UT" - Daily Orbit Update

Observations of risk-listed objects
K09B71L 2009 BL71 (small asteroid, arc=1 day, H=22.1 ~129m) from Sormano Obs. (Jan. 30.98-99p3)
K09B58F 2009 BF58 (small asteroid, arc=3 days, H=27.3 ~12m) from Spacewatch 1.8m (Jan. 31.24-25p3)
Observations of small asteroids (H>22.0)
K09B58K 2009 BK58 (Q=4.127 AU, arc=2 days, H=25.8 ~23m) from Guidestar Obs. (Jan. 30.80-83p3)
K09B58G 2009 BG58 (arc=3 days, H=26.0 ~21m) from the Mt. Lemmon Survey (MLS) (Jan. 30.37-39p3) and Saint-Barthelemy Obs. (Jan. 30.92-94p3)
K09B11A 2009 BA11 (arc=5 days, H=23.9 ~56m) from LINEAR (Jan. 30.28-33p5)
K09B05Q 2009 BQ5 (arc=11 days, H=23.2 ~78m) from Spacewatch 1.8m (Jan. 31.12-13p3)
K09B02K 2009 BK2 (arc=13 days, H=25.3 ~29m) from Spacewatch 1.8m (Jan. 31.14-15p2)
Observations of almost-small asteroids (21.7<H<=22.0)
K09B58O 2009 BO58 (arc=2 days, H=21.9 ~141m) from Guidestar Obs. (Jan. 30.89p2)
Observations of other objects
K09B71K 2009 BK71 (i=36.4°, arc=1 day, H=19.4 ~446m) from Monte Baldo Obs. (Jan. 30.97-98p3) and New Millennium Obs. (Jan. 31.00-01p5)
K09B02M 2009 BM2 (Q=4.288 AU, arc=13 days, H=19.8 ~371m) from Castelmartini Obs. (Jan. 28.93-94p4) and Capannoli Obs. (Jan. 30.90p3)
K09A16E 2009 AE16 (i=46.6°, arc=7 days, H=18.6 ~645m) from Cordell-Lorenz Obs. (Jan. 21.50p1 & 22.34-37p5)
K09A16D 2009 AD16 (Q=4.177 AU, arc=14 days, H=20.6 ~257m) from Cordell-Lorenz Obs. (Jan. 22.18-25p4, 23.20-25p4 & 25.22-26p3) and Castelmartini Obs. (Jan. 28.89-90p4)
K09A15L 2009 AL15 (arc=22 days, H=21.4 ~178m) from ARO (Jan. 29.12p2)
K09A00M 2009 AM (Q=4.768 AU, arc=29 days, H=21.4 ~178m) from ARO (Jan. 29.11p3) and Desert Moon Obs. (Jan. 30.27-30p3)
K08Y27S 2008 YS27 (arc=32 days, H=21.2 ~195m) from Desert Moon Obs. (Jan. 30.45-52p3)
K08Y26G 2008 YG26 (arc=32 days, H=21.7 ~155m) from Desert Moon Obs. (Jan. 30.18-20p2)
K08X03E 2008 XE3 (Q=4.045 AU, arc=2 opp, H=16.3 ~1.86 km) from LINEAR (Jan. 30.23-27p4)
K08X02E 2008 XE2 (arc=57 days, H=19.3 ~467m) from CSS (Jan. 30.20-23p4)
K08S01Q 2008 SQ1 (Q=4.682 AU, arc=2 opp, H=18.5 ~676m) from MLS (Jan. 30.15-17p4)
K08R98M 2008 RM98 (Q=4.198 AU, arc=146 days, H=20.2 ~309m) from B. Conklin via RAS Obs. Mayhill (Jan. 31.08p1)
K08Q03T 2008 QT3 (arc=159 days, H=18.8 ~589m) from Castelmartini Obs. (Jan. 28.87-88p4 & 30.86-87p4)
K08E00E 2008 EE (arc=2 opp, H=19.6 ~407m) from CSS (Jan. 30.35-38p4)
K06SL7Z 2006 SZ217 (arc=3 opp, H=17.4 ~1.12 km) from SSS (Jan. 30.56-60p4)
K02E02Z 2002 EZ2 (arc=3 opp, H=20.1 ~323m) from Desert Moon Obs. (Jan. 30.34-41p3)
K00B19L 2000 BL19 (Q=4.472 AU, arc=2 opp, H=19.8 ~371m) from LINEAR (Jan. 30.26-31p5)
K00A06E 2000 AE6 (Q=4.220 AU, arc=3 opp, H=17.5 ~1.07 km) from LINEAR (Jan. 30.28-33p5)
J99C08W 1999 CW8 (arc=3 opp, H=18.6 ~645m) from CSS (Jan. 30.13-16p4)
J9801 199801 2007 AE12 from MLS (Jan. 30.12-14p4)
E1052 141052 2001 XR1 from Castelmartini Obs. (Jan. 30.84-85p5)
D8911 138911 2001 AE2 from MLS (Jan. 30.49-51p4)
D7925 137925 2000 BJ19 from Purple Mtn. Obs. XuYi Station (XuYi Sta.) (Jan. 30.63-66p3)
52768 52768 1998 OR2 from Guidestar Obs. (Jan. 30.87-88p3)
35107 35107 1991 VH from Castelmartini Obs. (Jan. 30.85-86p5)
12711 12711 Tukmit (1991 BB) from LINEAR (Jan. 30.16-21p5)
12538 12538 1998 OH from CSS (Dec. 30.12-13p3)
08034 8034 Akka (1992 LR) from MLS (Jan. 30.40-42p4)
07358 7358 Oze (1995 YA3) from LINEAR (Jan. 30.20-25p5)
04596 4596 1981 QB from SSS (Jan. 30.64-68p5)
04179 4179 Toutatis (1989 AC) from Siegen Obs. (Jan. 29.93-94p3)
01864 1864 Daedalus (1971 FA) from Montana Blanca Obs. (Jan. 30.85p3)

MPEC 2009-B89 - "00:02 UT" - 2009 BL71

K09B71L 2009 BL71 (risk-listed, Earth MOID=5.1 LD, H=22.1 ~129m) was discovered at 0815 UT on 30 Jan. by CSS, which observed it at Jan. 30.27-29p4 and 30.34-38p4. The discovery was confirmed by Calar Alto Obs. (Jan. 30.81p3), Starkenburg Obs. (Jan. 30.87-88p2), and Saint-Barthelemy Obs. (Jan. 30.95-98p3).

Observers on 31 January '09

A total of 27 observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 3 in MPECs 2009-B90 & 2009-B93 -- 2009 BE77, 2009 AM, 2009 AL15
`493`	Calar Alto Obs. in Spain, 3 in MPECs 2009-B89, 2009-B91 & 2009-B93 -- 2009 BL71, 2009 BE77, C/2009 B2
`B09`	Capannoli Obs. in Italy, 1 in MPEC 2009-B90 -- 2009 BM2
`160`	Castelmartini Obs. in Italy, 5 in MPEC 2009-B90 -- 2009 BM2, 2009 AD16, 2008 QT3, 35107, 141052
`703`	Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2009-B89, 2009-B90 & 2009-B92 -- 2009 BL71, 2009 BD77, 2008 XE2, 2008 EE, 1999 CW8, 12538
`850`	Cordell-Lorenz Obs. in Tennessee, 2 in MPEC 2009-B90 -- 2009 AE16, 2009 AD16
`448`	Desert Moon Obs. in New Mexico, 7 in MPECs 2009-B90, 2009-B91, 2009-B92 & 2009-B93 -- 2009 BE77, 2009 BD77, C/2009 B2, 2009 AM, 2008 YS27, 2008 YG26, 2002 EZ2
`E16`	Grove Creek Obs. in New South Wales, 1 in MPEC 2009-B91 -- C/2009 B2
`A17`	Guidestar Obs. in Germany, 3 in MPEC 2009-B90 -- 2009 BO58, 2009 BK58, 52768
`704`	LINEAR in New Mexico, 7 in MPECs 2009-B90 & 2009-B91 -- 2009 BA11, C/2009 B2, 2008 XE3, 2000 BL19, 2000 AE6, 12711, 7358
`J46`	Montana Blanca Obs. in the Canary Islands, 1 in MPEC 2009-B90 -- 1864
`A99`	Monte Baldo Obs. in Italy, 1 in MPEC 2009-B90 -- 2009 BK71
`474`	Mt. John Obs. in New Zealand, 1 in MPEC 2009-B93 -- 2009 BE77
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 5 in MPEC 2009-B90 -- 2009 BG58, 2008 SQ1, 199801, 138911, 8034
`A24`	New Millennium Obs. in Italy, 1 in MPEC 2009-B90 -- 2009 BK71
`D29`	Purple Mtn. Obs. XuYi Station in China, 1 in MPEC 2009-B90 -- 137925
`H06`	RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-B91 -- C/2009 B2
`H06\`	B. Conklin via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-B90 -- 2008 RM98
`B04`	Saint-Barthelemy Obs. in Italy, 3 in MPECs 2009-B89, 2009-B90 & 2009-B92 -- 2009 BL71, 2009 BG58, 2009 BD77
`H36`	Sandlot Obs. in Kansas, 2 in MPECs 2009-B91 & 2009-B92 -- 2009 BD77, C/2009 B2
`204`	Schiaparelli Obs. in Italy, 2 in MPECs 2009-B92 & 2009-B93 -- 2009 BE77, 2009 BD77
`E12`	Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2009-B90 & 2009-B93 -- 2009 BE77, 2006 SZ217, 4596
`510`	Siegen Obs. in Germany, 1 in MPEC 2009-B90 -- 4179
`587`	Sormano Obs. in Italy, 1 in MPEC 2009-B90 -- 2009 BL71
`691`	Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2009-B91 -- C/2009 B2
`291`	Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2009-B90 & 2009-B93 -- 2009 BQ5, 2009 BK2, 2009 BF58, 2009 BE77
`611`	Starkenburg Obs. in Germany, 1 in MPEC 2009-B89 -- 2009 BL71
`673`	Table Mtn. Obs. in southern California, 1 in MPEC 2009-B91 -- C/2009 B2
`6735`	Jim Young via Table Mtn. Obs. in southern California, 2 in MPECs 2009-B92 & 2009-B93 -- 2009 BE77, 2009 BD77

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

Impact Risk Monitoring on 31 January '09

**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.
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 BL71	JPL Sentry	1636	2021-2108	88	2.4e-07	-5.12	-5.36	0	JPL #2 for the day: "Analysis based on 19 observations spanning .72150 days (2009-Jan-30.26931 to 2009-Jan-30.99081)." Diameter approximately 0.132 km. from mean, weighted H=22.0.
2009 BL71	NEODyS	1636	2065-2077	2	2.82e-10	-8.25	-8.27	0	NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2009/01/30.270 to 2009/01/30.992."

2009 BJ58	NEODyS	1636	2011-2087	180	4.01e-07	-2.69	-3.45	0	NEODyS: "Based on 36 optical observations (of which 0 are rejected as outliers) from 2009/01/29.140 to 2009/01/30.492."
2009 BJ58	JPL Sentry	0154	2014-2061	25	1.6e-07	-3.00	-3.33	0	JPL: "Analysis based on 36 observations spanning 1.3518 days (2009-Jan-29.13966 to 2009-Jan-30.49147)." Diameter approximately 0.541 km. from mean, weighted H=19.0.

2009 BF58	JPL Sentry	1636	2055-2109	59	3.6e-04	-4.89	-5.37	0	JPL #2 for the day: "Analysis based on 33 observations spanning 2.9829 days (2009-Jan-28.26267 to 2009-Jan-31.24561)." Diameter approximately 0.012 km. from mean, weighted H=27.3.
2009 BF58	NEODyS	1636	2057-2090	30	2.25e-04	-5.04	-5.39	0	NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2009/01/28.263 to 2009/01/31.246."

2009 BC58	NEODyS	1636	2019-2089	32	5.94e-08	-3.70	-4.31	0	NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2009/01/25.421 to 2009/01/30.388."
2009 BC58	JPL Sentry	0018	2019-2106	25	4.7e-08	-3.79	-4.34	0	JPL: "Analysis based on 25 observations spanning 4.9666 days (2009-Jan-25.4202 to 2009-Jan-30.38681)." Diameter approximately 0.898 km. from mean, weighted H=17.9.

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 31 January '09

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

1758	Grabbed MPEC 2009-B91 - Comet C/2009 B2 (LINEAR) - see above Grabbed MPEC 2009-B92 - 2009 BD77 - see above Grabbed MPEC 2009-B93 - 2009 BE77 - see above
1636	Noted that NEODyS has posted 2009 BC58 as an impact risk - see above Noted that JPL Sentry has updated its 2009 BF58 risk assessment - see above Noted that NEODyS has posted 2009 BF58 as an impact risk - see above Noted that NEODyS has posted 2009 BJ58 as an impact risk - see above Noted that JPL Sentry has updated its 2009 BL71 risk assessment - see above Noted that NEODyS has posted 2009 BL71 as an impact risk - see above Grabbed MPEC 2009-B90 - Daily Orbit Update - see above
0324	Noted that JPL Sentry has posted 2009 BL71 as an impact risk - see above
0154	Noted that JPL Sentry has posted 2009 BJ58 as an impact risk - see above
0106	Noted that JPL Sentry has posted 2009 BF58 as an impact risk - see above
0018	Noted that JPL Sentry has posted 2009 BC58 as an impact risk - see above Grabbed MPEC 2009-B89 - 2009 BL71 - see above

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