Contents  on 19 January '12

Resources:

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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 19 January '12

Four objects reported inside ten LD

There are four asteroids reported within ten lunar distances (LD) of our planet today. Inside Earth's Hill sphere, intruder 2012 BV1 comes from 2.64 to 1.01 LD. More distant, 2012 AQ10 is departing, moving from 4.49 to 5.91 LD and 2011 YH40 from 7.10 to 8.58 LD, while 2012 BS1 enters ten LD, moving from 10.4 to 8.4 LD*.

Headed our way, 2012 BY1 arrives inside ten LD on January 22nd and radar target 2011 CP4 comes inside ten LD on February 22nd.

This report was updated at 0046 Jan. 20th UTC with new discoveries 2012 BY1 (MPEC 2012-B18), 2012 BX1 (MPEC 2012-B17), 2012 BV1 (MPEC 2012-B16), 2012 BU1 (MPEC 2012-B15), 2012 BT1 (MPEC 2012-B14), and 2012 BS1 (MPEC 2012-B13). It was updated earlier with follow-up in today's DOU MPEC for 2012 AQ10, 2012 AP10, and 2011 YH40. This report was previously refreshed at 0008 Jan. 20th UTC and 1650 UTC.


Notes: Ten LD has no astronomical significance but is a useful reporting boundary. Earth's Hill sphere (of gravitational influence) has a radius estimated at about 3.89 LD. 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.

NEOCP Activity  on 19 January '12

The MPC's NEO Confirmation Page has 24 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 24 objects listed. Of these, eighteen were "one nighters." The Tracking News counted a total of 48 listings on the NEOCP on this day.

New MPECs  on 19 January '12

Minor Planet Electronic Circulars

There were fifteen MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2012-B21 - "23:38 UT" - 2011 XZ1


MPEC 2012-B20 - "23:21 UT" - 2012 BB2


MPEC 2012-B19 - "21:48 UT" - 2012 BZ1


MPEC 2012-B18 - "21:45 UT" - 2012 BY1


MPEC 2012-B17 - "21:43 UT" - 2012 BX1


MPEC 2012-B16 - "21:41 UT" - 2012 BV1


MPEC 2012-B15 - "21:39 UT" - 2012 BU1


MPEC 2012-B14 - "21:37 UT" - 2012 BT1


MPEC 2012-B13 - "21:34 UT" - 2012 BS1


MPEC 2012-B12 - "21:32 UT" - 2012 BR1


MPEC 2012-B11 - "21:30 UT" - 2012 BP1


MPEC 2012-B10 - "21:28 UT" - 2012 BO1


MPEC 2012-B09 - "21:25 UT" - 2012 BN1


MPEC 2012-B08 - "17:13 UT" - Deletion of 2011 YH74


<< DOU on 19 Jan. '12 >>  MPEC 2012-B07 - "06:04 UT" - Daily Orbit Update

Observers  on 19 January '12

A total of 28 observers appeared in this day's MPECs.

CodeObserver / observatory
160Castelmartini Obs. in Italy, 11 in MPEC 2012-B07 -- 2012 AY, 2012 AE1, 2011 YV15, 2011 XE1, 2008 WZ13, 2008 QY, 1996 AE2, 310442, 263976, 192642, 433
703Catalina Sky Survey (CSS) in Arizona, 13 in MPECs 2012-B07, 2012-B17 & 2012-B19 -- 2012 BZ1, 2012 BX1, 2012 AY, 2012 AC13, 2011 YG28, 2008 NS1, 2003 BX33, 275792, 172034, 163000, 162038, 101873, 6050
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPECs 2012-B07 & 2012-B20 -- 2012 BB2, 2012 AC11, 2011 XE, 2011 WE44, 2011 VO5, 2005 JA22, 2004 JO2
970Chelmsford Obs. in England, 1 in MPEC 2012-B07 -- 2003 AF23
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2012-B07 -- 433
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2012-B07 -- 16834
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 3 in MPECs 2012-B07, 2012-B17 & 2012-B20 -- 2012 BX1, 2012 BB2, 2011 YU62
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2012-B20 -- 2012 BB2
C73Galati Obs. in Romania, 14 in MPECs 2012-B07 & 2012-B17 -- 2012 BX1, 2012 AE1, 2008 WZ13, 2006 VY13, 1996 AE2, 85628, 310842, 29075, 263976, 163693, 143651, 142563, 8567, 6455
695]Mark Trueblood via Kitt Peak Natl. Obs. (KPNO) in Arizona, 11 in MPEC 2012-B07 -- 2012 AP10, 2011 YJ28, 2011 YH28, 2011 XM1, 2011 WU95, 2011 WN15, 2011 VU5, 2011 PS, 2011 PO1, 2011 OR15, 2011 LC19
704LINEAR in New Mexico, 12 in MPECs 2012-B07 & 2012-B20 -- 2012 BB2, 2011 YM63, 2011 UU106, 2011 SR69, 1996 AE2, 85709, 21277, 190491, 142348, 141498, 2340, 433
J87La Canada Obs. in Spain, 1 in MPEC 2012-B20 -- 2012 BB2
A14Les Engarouines Obs. in France, 1 in MPEC 2012-B07 -- 2012 AC13
J131National Schools Obs. via the Liverpool Telescope in the Canary Islands, 1 in MPEC 2012-B07 -- 2011 YH40
I36Los Campitos Obs. in Argentina, 1 in MPEC 2012-B07 -- 2011 YU62
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2012-B07, 2012-B09, 2012-B10, 2012-B11, 2012-B12, 2012-B13, 2012-B14, 2012-B15, 2012-B16, 2012-B18 & 2012-B19 -- 2012 BZ1, 2012 BY1, 2012 BV1, 2012 BU1, 2012 BT1, 2012 BS1, 2012 BR1, 2012 BP1, 2012 BO1, 2012 BN1, 2012 AC13, 2009 QE8
566NEAT's GEODSS Haleakala telescope in Hawaii, 1 in MPEC 2012-B21 -- 2011 XZ1
A24New Millennium Obs. in Italy, 23 in MPEC 2012-B07 -- 2011 YH40, 2011 XO3, 2011 WV134, 2008 WZ13, 2004 YU5, 90147, 42286, 24475, 21088, 209924, 20826, 202435, 137805, 137084, 10145, 8567, 4183, 3691, 3200, 1943, 1627, 1620, 1036
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 17 in MPEC 2012-B07 -- 2012 AY, 2012 AE1, 2011 XO3, 2011 XE1, 2011 WV134, 2011 SL102, 2008 WZ13, 2008 GE1, 2006 MJ10, 2003 AF23, 1996 AE2, 310442, 29075, 289315, 143651, 142348, 138524
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-B07 -- 2011 XO3
461SZTE Asteroid Program in Hungary, 1 in MPEC 2012-B20 -- 2012 BB2
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2012-B14, 2012-B15, 2012-B17 & 2012-B20 -- 2012 BX1, 2012 BU1, 2012 BT1, 2012 BB2
H36Sandlot Obs. in Kansas, 2 in MPECs 2012-B17 & 2012-B20 -- 2012 BX1, 2012 BB2
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2012-B07 -- 2012 AQ10, 2011 XS2, 96536
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2012-B07 -- 192642, 141018
291Spacewatch 1.8m telescope in Arizona, 19 in MPECs 2012-B07, 2012-B14, 2012-B15, 2012-B16, 2012-B17 & 2012-B18 -- 2012 BY1, 2012 BX1, 2012 BV1, 2012 BU1, 2012 BT1, 2012 AP10, 2012 AM10, 2011 YX10, 2011 YD40, 2011 YC29, 2011 XZ1, 2011 XF, 2011 WW4, 2011 WN15, 2011 WL2, 2011 VP12, 2011 ME5, 2008 NS1, 2004 EO20
H47Vicksburg Obs. in Mississippi, 2 in MPEC 2012-B07 -- 2011 YV15, 1996 AE2
I15Wishing Star Obs. in Rhode Island, 2 in MPEC 2012-B07 -- 2008 WZ13, 2005 NJ1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 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 BU1JPL Sentry23592057-2112331.8e-04-5.32-5.890JPL: "Analysis based on 19 observations spanning 1.0864 days (2012-Jan-18.32077 to 2012-Jan-19.40714)." Diameter approximately 0.010 km. from mean, weighted H=27.7.
2012 AP10JPL Sentry15482069-2111829.7e-05-5.07-5.810JPL: "Analysis based on 57 observations spanning 8.1233 days (2012-Jan-11.08359 to 2012-Jan-19.20688)." Diameter approximately 0.018 km. from mean, weighted H=26.4.
2011 WL2JPL Sentry1548209818.8e-07-4.25-4.250JPL: "Analysis based on 198 observations spanning 63.796 days (2011-Nov-16.31883 to 2012-Jan-19.11481)." Diameter approximately 0.240 km. from mean, weighted H=20.7.
NEODyS15482083-208311.67e-09-6.88-6.880NEODyS: "Based on 198 optical observations (of which 0 are rejected as outliers) from 2011-11-16.320 to 2012-01-19.116."

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 19 January '12

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

0046 1/20Updated Traffic Report
2359Noted that JPL Sentry has posted 2012 BU1 as an impact risk - see above
Grabbed MPEC 2012-B20 - 2012 BB2 - see above
Grabbed MPEC 2012-B21 - 2011 XZ1 - see above
2207Grabbed MPEC 2012-B09 - 2012 BN1 - see above
Grabbed MPEC 2012-B10 - 2012 BO1 - see above
Grabbed MPEC 2012-B11 - 2012 BP1 - see above
Grabbed MPEC 2012-B12 - 2012 BR1 - see above
Grabbed MPEC 2012-B13 - 2012 BS1 - see above
Grabbed MPEC 2012-B14 - 2012 BT1 - see above
Grabbed MPEC 2012-B15 - 2012 BU1 - see above
Grabbed MPEC 2012-B16 - 2012 BV1 - see above
Grabbed MPEC 2012-B17 - 2012 BX1 - see above
Grabbed MPEC 2012-B18 - 2012 BY1 - see above
Grabbed MPEC 2012-B19 - 2012 BZ1 - see above
1740Grabbed MPEC 2012-B08 - Deletion of 2011 YH74 - see above
1548Noted that JPL Sentry has updated its 2011 WL2 risk assessment - see above
Noted that NEODyS has updated its 2011 WL2 risk assessment - see above
Noted that JPL Sentry has updated its 2012 AP10 risk assessment - see above
Grabbed MPEC 2012-B07 - Daily Orbit Update - see above