Contents  on 21 January '12

Resources:

The latest A/CC news is available via framed access, RSS news feed 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.

Traffic Report  on 21 January '12

Five objects reported inside ten LD

Five objects are reported flying within ten lunar distances (LD) of Earth today. Intruder 2012 BV1 is within one LD of the Moon. 2012 BL14 is heading out from 4.53 to 8.92 LD, 2012 BS1 is coming in from 6.6 to 4.9 LD*, 2012 AQ10 is departing, moving from 7.39 to 8.90 LD, and 2012 BK14 is headed away from 8.1 to 9.2 LD*.

On approach, risk-listed 2012 BY1 and 2012 BW13 arrive inside ten LD tomorrow, 2012 BD14 comes inside ten LD on January 25th, and radar target 2011 CP4 arrives on February 22nd.

This report was updated at 1814 UTC with new discoveries 2012 BL14 (MPEC), 2012 BK14 (MPEC), 2012 BD14 (MPEC), 2012 BC14 (MPEC), 2012 BZ13 (MPEC), and 2012 BW13 (MPEC), and follow-up in today's DOU MPEC for 2012 BY1, 2012 BU1, and 2012 AW10, plus distant 207398 2006 AS2. The first edition of this report was posted at 0104 UTC.


Notes: Ten LD has no astronomical significance but is a useful reporting boundary. Distances are interpreted by A/CC from JPL Horizons data. "LD*" indicates some passage uncertainty. See also today's timeline plus current additional details, sky chart, and ephemerides.

Radar Astrometry  on 21 January '12

Radar observation of three objects

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


Data update noted at 0100 UTC when the database was dated 20 Jan.


Data update noted at 0209 UTC when the database was dated 20 Jan.



Photometry is needed for upcoming radar targets and also some astrometry. See Arecibo and Goldstone schedules.

NEOCP Activity  on 21 January '12

The MPC's NEO Confirmation Page has 18 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eighteen objects listed. Of these, eleven were "one nighters." So far The Tracking News has counted a total of 49 listings on the NEOCP today.

New MPECs  on 21 January '12

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been sixteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2012-B47 - "15:17 UT" - 2012 BL14


MPEC 2012-B46 - "15:15 UT" - 2012 BK14


MPEC 2012-B45 - "14:18 UT" - 2012 BJ14


MPEC 2012-B44 - "14:16 UT" - 2012 BH14


MPEC 2012-B43 - "14:14 UT" - 2012 BG14


MPEC 2012-B42 - "14:08 UT" - 2012 BF14


MPEC 2012-B41 - "14:06 UT" - 2012 BE14


MPEC 2012-B40 - "14:04 UT" - 2012 BD14


MPEC 2012-B39 - "14:02 UT" - 2012 BC14


MPEC 2012-B38 - "14:00 UT" - 2012 BB14


MPEC 2012-B37 - "13:58 UT" - 2012 BA14


MPEC 2012-B36 - "13:56 UT" - 2012 BZ13


MPEC 2012-B35 - "13:54 UT" - 2012 BX13


MPEC 2012-B34 - "13:52 UT" - 2012 BW13


MPEC 2012-B33 - "13:49 UT" - 2012 BV13


<< DOU on 21 Jan. '12 >>  MPEC 2012-B32 - "06:04 UT" - Daily Orbit Update

Observers  on 21 January '12

A total of 23 observers appear in today's MPECs.

CodeObserver / observatory
251Arecibo in Puerto Rico, 3 in radar -- 2011 XD1, 2011 WS95, 2001 YE4
H21Astronomical Research Obs. Westfield in Illinois, 11 in MPECs 2012-B32, 2012-B35 & 2012-B37 -- 2012 BX13, 2012 BA14, 2012 AN10, 2012 AC3, 2011 XE1, 2011 XE, 2011 WL2, 2011 RR12, 2011 QZ13, 2011 QY37, 2011 QF14
J51Atlante Obs. in the Canary Islands, 2 in MPEC 2012-B32 -- 2011 SL102, 1627
160Castelmartini Obs. in Italy, 4 in MPEC 2012-B32 -- 2011 WV134, 2003 AF23, 311555, 294739
703Catalina Sky Survey (CSS) in Arizona, 13 in MPECs 2012-B32, 2012-B33, 2012-B35, 2012-B36, 2012-B37, 2012-B43 & 2012-B46 -- 2012 BZ13, 2012 BX13, 2012 BV13, 2012 BK14, 2012 BG14, 2012 BA14, 2002 AN11, 35396, 263976, 163693, 138911, 138524, 1943
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPECs 2012-B32 & 2012-B40 -- 2012 BD14, 2012 AE3, 2009 BT5
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 4 in MPECs 2012-B32, 2012-B33, 2012-B35 & 2012-B37 -- 2012 BX13, 2012 BV13, 2012 BA14, 2012 AC13
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-B32 -- 2011 YV62
J95Great Shefford Obs. in England, 1 in MPEC 2012-B33 -- 2012 BV13
695Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2012-B32 -- 2012 AE3
695{program code "{" (31) via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2012-B32 -- 1995 EK1
704LINEAR in New Mexico, 9 in MPEC 2012-B32 -- 2012 BG11, 2011 YG28, 2011 XE1, 2006 VY13, 2003 AF23, 310442, 308127, 7092, 3352
950.Ovidiu Vaduvescu via La Palma in the Canary Islands, 1 in MPEC 2012-B32 -- 2011 YA
H01Magdalena Ridge Obs. (MRO) in New Mexico, 10 in MPECs 2012-B33, 2012-B35, 2012-B36, 2012-B37, 2012-B38, 2012-B40, 2012-B41, 2012-B42, 2012-B44 & 2012-B45 -- 2012 BZ13, 2012 BX13, 2012 BV13, 2012 BJ14, 2012 BH14, 2012 BF14, 2012 BE14, 2012 BD14, 2012 BB14, 2012 BA14
G96Mt. Lemmon Survey (MLS) in Arizona, 23 in MPECs 2012-B32, 2012-B33, 2012-B34, 2012-B37, 2012-B38, 2012-B39, 2012-B40, 2012-B41, 2012-B42, 2012-B43, 2012-B44, 2012-B45 & 2012-B47 -- 2012 BW13, 2012 BV13, 2012 BU1, 2012 BL14, 2012 BJ14, 2012 BH14, 2012 BG14, 2012 BF14, 2012 BE14, 2012 BD14, 2012 BC14, 2012 BB14, 2012 BA14, 2012 AC11, 2011 YA63, 2011 QC46, 2011 LJ1, 2011 GD62, 2007 MM13, 2000 DV110, 168378, 159368, 138911
644NEAT's Mt. Palomar telescope in southern California, 2 in MPEC 2012-B32 -- 89830, 111253
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2012-B32 -- 154555
H23Pear Tree Obs. in Florida, 2 in MPEC 2012-B32 -- 2011 YV15, 1996 AE2
854Sabino Canyon Obs. in Arizona, 5 in MPECs 2012-B33, 2012-B35, 2012-B36, 2012-B37 & 2012-B43 -- 2012 BZ13, 2012 BX13, 2012 BV13, 2012 BG14, 2012 BA14
H36Sandlot Obs. in Kansas, 1 in MPEC 2012-B35 -- 2012 BX13
204Schiaparelli Obs. in Italy, 3 in MPEC 2012-B32 -- 2012 AW10, 2011 YM63, 2008 GE1
645Sloan Digital Sky Survey (SDSS) in New Mexico, 27 in MPEC 2012-B32 -- 2008 WL60, 2008 UT5, 2008 TF4, 2008 SN1, 2008 AE, 2006 XF2, 2006 UN, 2006 TO, 2006 PB1, 2006 GW2, 2005 VC2, 2005 TO45, 2005 RK3, 2005 MP13, 2005 HB, 2004 TU11, 2004 QC17, 310737, 190161, 178871, 175189, 172718, 169352, 164217, 162854, 162741, 162149
691Spacewatch 0.9m telescope in Arizona, 5 in MPEC 2012-B32 -- 2007 BG49, 2003 BK47, 65706, 207398, 12923
291Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2012-B32, 2012-B35, 2012-B39, 2012-B45 & 2012-B46 -- 2012 BY1, 2012 BX13, 2012 BU1, 2012 BK14, 2012 BJ14, 2012 BC14, 2012 AB3, 2011 WL2, 2011 VV5
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 21 January '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON2 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
2012 BL14JPL Sentry19152023-21111291.4e-05-5.79-6.160JPL: "Analysis based on 17 observations spanning .11881 days (2012-Jan-21.37429 to 2012-Jan-21.4931)." Diameter approximately 0.008 km. from mean, weighted H=28.2.
2012 BK14JPL Sentry20292020-21035284.5e-05-5.87-6.910JPL: "Analysis based on 11 observations spanning .14854 days (2012-Jan-21.317 to 2012-Jan-21.46554)." Diameter approximately 0.009 km. from mean, weighted H=28.0.
2012 BJ14JPL Sentry16102025-2111458.8e-07-5.05-5.330JPL: "Analysis based on 21 observations spanning .83980 days (2012-Jan-20.51304 to 2012-Jan-21.35284)." Diameter approximately 0.043 km. from mean, weighted H=24.5.
2012 BB14JPL Sentry1610203114.9e-10-9.16-9.160JPL: "Analysis based on 11 observations spanning .94161 days (2012-Jan-20.20156 to 2012-Jan-21.14317)." Diameter approximately 0.034 km. from mean, weighted H=25.0.
2012 BW13JPL Sentry16102065-2111531.8e-05-5.94-6.410JPL: "Analysis based on 13 observations spanning 2.2820 days (2012-Jan-19.20743 to 2012-Jan-21.48947)." Diameter approximately 0.013 km. from mean, weighted H=27.1.
2012 BO11NEODyS16102028-208765.47e-08-7.65-7.840NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2012-01-19.493 to 2012-01-20.477."
JPL Sentry01002067-2105123.4e-08-7.99-8.360JPL: "Analysis based on 12 observations spanning .98368 days (2012-Jan-19.49216 to 2012-Jan-20.47584)." Diameter approximately 0.026 km. from mean, weighted H=25.6.
2012 BN11NEODyS16102015-2083101.77e-08-4.94-5.130NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2012-01-19.469 to 2012-01-20.378."
2012 BK11NEODyS16102014-209084.37e-08-4.98-4.980NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2012-01-19.461 to 2012-01-20.559."
2012 BY1NEODyS16112043-208361.21e-06-6.14-6.620NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2012-01-18.391 to 2012-01-20.506."
JPL Sentry16102043-2106171.9e-06-6.00-6.560JPL: "Analysis based on 13 observations spanning 2.1154 days (2012-Jan-18.39002 to 2012-Jan-20.50542)." Diameter approximately 0.023 km. from mean, weighted H=25.9.
2012 BU1NEODyS16112062-209054.12e-07-7.94-8.150NEODyS: "Based on 26 optical observations (of which 1 are rejected as outliers) from 2012-01-18.322 to 2012-01-20.510."
JPL Sentry16102059-2112221.1e-04-5.58-6.080JPL: "Analysis based on 26 observations spanning 2.1886 days (2012-Jan-18.32077 to 2012-Jan-20.5094)." Diameter approximately 0.010 km. from mean, weighted H=27.7.
2012 AP10NEODyS16102064-2089507.64e-05-5.12-5.710NEODyS: "Based on 63 optical observations (of which 2 are rejected as outliers) from 2012-01-11.084 to 2012-01-20.209."
2011 YV62JPL Sentry16102078-208746.8e-08-5.19-5.240JPL: "Analysis based on 41 observations spanning 21.100 days (2011-Dec-30.23271 to 2012-Jan-20.332898)." Diameter approximately 0.210 km. from mean, weighted H=21.0.
NEODyS16102072-208545.99e-08-5.24-5.260NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2011-12-30.233 to 2012-01-20.334."
2011 WL2JPL Sentry16102098-211028.2e-07-4.28-4.280JPL: "Analysis based on 203 observations spanning 65.774 days (2011-Nov-16.31883 to 2012-Jan-21.09291)." Diameter approximately 0.240 km. from mean, weighted H=20.7.
NEODyS1610R E M O V E D-

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 21 January '12

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

2029Noted that JPL Sentry has posted 2012 BK14 as an impact risk - see above
1915Noted that JPL Sentry has posted 2012 BL14 as an impact risk - see above
1814Updated Traffic Report
1611Noted that NEODyS has updated its 2012 BU1 risk assessment - see above
Noted that NEODyS has updated its 2012 BY1 risk assessment - see above
1610Noted that JPL Sentry has updated its 2011 WL2 risk assessment - see above
Noted that NEODyS has removed 2011 WL2 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 YV62 risk assessment - see above
Noted that NEODyS has updated its 2011 YV62 risk assessment - see above
Noted that NEODyS has updated its 2012 AP10 risk assessment - see above
Noted that JPL Sentry has posted 2012 BB14 as an impact risk - see above
Noted that JPL Sentry has posted 2012 BJ14 as an impact risk - see above
Noted that NEODyS has posted 2012 BK11 as an impact risk - see above
Noted that NEODyS has posted 2012 BN11 as an impact risk - see above
Noted that NEODyS has posted 2012 BO11 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 BU1 risk assessment - see above
Noted that JPL Sentry has posted 2012 BW13 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 BY1 risk assessment - see above
Grabbed MPEC 2012-B32 - Daily Orbit Update - see above
Grabbed MPEC 2012-B33 - 2012 BV13 - see above
Grabbed MPEC 2012-B34 - 2012 BW13 - see above
Grabbed MPEC 2012-B35 - 2012 BX13 - see above
Grabbed MPEC 2012-B36 - 2012 BZ13 - see above
Grabbed MPEC 2012-B37 - 2012 BA14 - see above
Grabbed MPEC 2012-B38 - 2012 BB14 - see above
Grabbed MPEC 2012-B39 - 2012 BC14 - see above
Grabbed MPEC 2012-B40 - 2012 BD14 - see above
Grabbed MPEC 2012-B41 - 2012 BE14 - see above
Grabbed MPEC 2012-B42 - 2012 BF14 - see above
Grabbed MPEC 2012-B43 - 2012 BG14 - see above
Grabbed MPEC 2012-B44 - 2012 BH14 - see above
Grabbed MPEC 2012-B45 - 2012 BJ14 - see above
Grabbed MPEC 2012-B46 - 2012 BK14 - see above
Grabbed MPEC 2012-B47 - 2012 BL14 - see above
0209Noted Radar Astrometry database update - see above
0100Noted that JPL Sentry has posted 2012 BO11 as an impact risk - see above
Noted Radar Astrometry database update - see above