2012-01-19 Tracking News

Contents on 19 January '12

Traffic Report -- four objects
IAU Minor Planet Center
- NEOCP Activity -- 24 listings
- New MPECs -- fifteen MPECs
Observers -- 28 observers
Impact Risk Monitoring -- three objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page (archive)
Earth's Busy Neighborhood close passer EBN Traffic Report
Ephemerides for risk-rated & nearby objects + potential mission destinations
News image catalog
News old archive & Small Objects Archive
Object Links - mainly for radar targets & close passers - updated 8 Jan.
Observing Campaigns

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.

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-B07 time-stamped "06:04 UT" - Daily Orbit Update - see below
MPEC 2012-B08 time-stamped "17:13 UT" - Deletion of 2011 YH74 - see below
MPEC 2012-B09 time-stamped "21:25 UT" - 2012 BN1 - see below
MPEC 2012-B10 time-stamped "21:28 UT" - 2012 BO1 - see below
MPEC 2012-B11 time-stamped "21:30 UT" - 2012 BP1 - see below
MPEC 2012-B12 time-stamped "21:32 UT" - 2012 BR1 - see below
MPEC 2012-B13 time-stamped "21:34 UT" - 2012 BS1 - see below
MPEC 2012-B14 time-stamped "21:37 UT" - 2012 BT1 - see below
MPEC 2012-B15 time-stamped "21:39 UT" - 2012 BU1 - see below
MPEC 2012-B16 time-stamped "21:41 UT" - 2012 BV1 - see below
MPEC 2012-B17 time-stamped "21:43 UT" - 2012 BX1 - see below
MPEC 2012-B18 time-stamped "21:45 UT" - 2012 BY1 - see below
MPEC 2012-B19 time-stamped "21:48 UT" - 2012 BZ1 - see below
MPEC 2012-B20 time-stamped "23:21 UT" - 2012 BB2 - see below
MPEC 2012-B21 time-stamped "23:38 UT" - 2011 XZ1

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

K11X01Z 2011 XZ1 (H=17.5 ~1.07 km) from NEAT's GEODSS Haleakala telescope (1998 May 1.44-48p3 & 1998 May 2.47-51p3)

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

K12B02B 2012 BB2 (H=20.6 ~257m) from LINEAR (Jan. 17.36-40p4 & 18.22-26p3), Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) (Jan. 18.14p3), Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Jan. 18.15-16p4 & 19.09-10p4), Sandlot Obs. (Jan. 18.23-25p3), San Marcello Pistoiese Obs. (Jan. 18.75-76p2), Farra d'Isonzo Obs. (Jan. 18.86p1 & 18.90p1), the SZTE Asteroid Program (Jan. 18.98-99p8), and La Canada Obs. (Jan. 19.89-90p3)

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

K12B01Z 2012 BZ1 (small asteroid, i=37.1°, H=23.8 ~59m) from the Catalina Sky Survey (CSS) (Jan. 18.48-55p11) and the Mt. Lemmon Survey (MLS) (Jan. 19.54-55p8)

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

K12B01Y 2012 BY1 (Earth MOID=1.1 LD, i=0.4°, H=26.0 ~21m, close passer) from MLS (Jan. 18.39-40p3 & 19.39-40p4) and the Spacewatch 1.8m telescope (Jan. 18.46p3)

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

K12B01X 2012 BX1 (Earth MOID=5.3 LD, H=24.8 ~37m, close passer) from CSS (Jan. 18.36-41p7, 18.48p4 & 19.36-37p4), Sandlot Obs. (Jan. 18.44p4), Spacewatch 1.8m (Jan. 18.47p3), San Marcello Pistoiese Obs. (Jan. 18.85-86p3), Galati Obs. (Jan. 19.03-04p5), and DGRO-RH (Jan. 19.19p4)

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

K12B01V 2012 BV1 (Earth MOID=0.3 LD, i=0.8°, H=31.0 ~2m, close passer) from MLS (Jan. 18.35-36p4, 18.42-45p5 & 19.44-47p7) and Spacewatch 1.8m (Jan. 18.40p2 & 18.45-46p3)

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

K12B01U 2012 BU1 (risk-listed, Earth MOID=0.2 LD, i=0.4°, H=27.7 ~10m, close passer) from MLS (Jan. 18.32-37p8, 18.44p4 & 19.41p3), Spacewatch 1.8m (Jan. 18.37p2), and San Marcello Pistoiese Obs. (Jan. 18.83-84p2)

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

K12B01T 2012 BT1 (Earth MOID=5.2 LD, i=4.3°, H=27.4 ~11m, close passer) from MLS (Jan. 18.32-37p8, 18.44p4 & 19.34p3), Spacewatch 1.8m (Jan. 18.38p3), and San Marcello Pistoiese Obs. (Jan. 18.81-82p2)

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

K12B01S 2012 BS1 (Earth MOID=0.9 LD, i=1.1°, H=28.7 ~6m, close passer) from MLS (Jan. 18.29-30p4 & 19.42-44p4)

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

K12B01R 2012 BR1 (small asteroid, H=26.5 ~17m) from MLS (Jan. 18.29-31p8 at V=20.7-21.2 & 19.39p4 at V=21.2-22.2)

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

K12B01P 2012 BP1 (small asteroid, H=24.2 ~49m) from MLS (Jan. 18.20-24p8 & 19.33p3)

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

K12B01O 2012 BO1 (small asteroid, H=24.9 ~35m) from MLS (Jan. 18.20-21p3 at V=21.1-22.4 & 19.45-46p7 at V=21.2-8)

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

K12B01N 2012 BN1 (small asteroid, Earth MOID=13.1 LD, i=4.6°, H=25.4 ~28m) from MLS (Jan. 18.19-21p4 & 19.33p4)

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

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

Observations of risk-listed objects
K12A10P 2012 AP10 (small asteroid, arc=8 days, H=26.4 ~18m, close passer) from Mark Trueblood via Kitt Peak Natl. Obs. (KPNO) (Jan. 18.16p4 at R=21.6-22.1) and Spacewatch 1.8m (Jan. 19.20-21p3)
K11W02L 2011 WL2 (arc=64 days, H=20.8 ~234m) from Spacewatch 1.8m (Jan. 19.11p3)
Observations of recently (no longer) risk-listed objects
K11Y28J 2011 YJ28 (arc=22 days, H=21.1 ~204m) from Trueblood/KPNO (Jan. 18.32-33p4)
K11Y28H 2011 YH28 (Q=4.495 AU, arc=22 days, H=20.4 ~282m) from Trueblood/KPNO (Jan. 18.33-34p4)
K11X01Z 2011 XZ1 (arc=43 days, H=17.5 ~1.07 km) from Spacewatch 1.8m (Jan. 18.25-26p3)
K11X01M 2011 XM1 (Q=4.431 AU, arc=45 days, H=20.0 ~339m) from Trueblood/KPNO (Jan. 18.45-47p4)
Observations of close-passing objects
K12A10Q 2012 AQ10 (arc=4 days, H=26.7 ~15m, close passer) from the Siding Spring Survey (SSS) (Jan. 16.74p3)
K11Y40H 2011 YH40 (arc=19 days, H=22.9 ~89m, close passer) from National Schools Obs. via the Liverpool Telescope (Jan. 3.93p4) and New Millennium Obs. (Jan. 13.90p3)
Observation campaigns (radar support, potential mission destinations)
K08G01E 2008 GE1 (arc=3 opp, H=19.5 ~426m, PMD) from Petit Jean Mtn. South Obs. (PJMSO) (Jan. 18.26-27p4)
K04E20O 2004 EO20 (arc=3 opp, H=22.1 ~129m, PMD) from Spacewatch 1.8m (Jan. 19.14-15p3)
Q3976 263976 2009 KD5 (radar) from Castelmartini Obs. (Jan. 18.14-15p3) and Galati Obs. (Jan. 19.14-15p10)
J2642 192642 1999 RD32 (radar) from Castelmartini Obs. (Jan. 18.02-03p3) and the Spacewatch 0.9m telescope (Jan. 18.41-45p3)
J0491 190491 2000 FJ10 (PMD) from LINEAR (Jan. 18.22-27p5)
E1018 141018 2001 WC47 (PMD, radar) from Spacewatch 0.9m (Jan. 18.27-31p3)
29075 29075 1950 DA (radar) from PJMSO (Jan. 18.30-31p5) and Galati Obs. (Jan. 18.72p2)
00433 433 Eros (1898 DQ) (radar) from Castelmartini Obs. (Jan. 18.03p3), LINEAR (Jan. 18.42-46p4), and Cordell-Lorenz Obs. (Jan. 19.17-19p2)
-- Potential mission destinations list & ephemerides -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K12A10M 2012 AM10 (arc=5 days, H=22.8 ~93m) from Spacewatch 1.8m (Jan. 19.12-13p3)
K12A00Y 2012 AY (arc=16 days, H=22.4 ~112m) from Castelmartini Obs. (Jan. 18.00-01p3), CSS (Jan. 18.31-34p4), and PJMSO (Jan. 18.32-33p7)
K11Y63M 2011 YM63 (arc=18 days, H=22.3 ~117m) from LINEAR (Jan. 18.34-38p4)
K11Y29C 2011 YC29 (arc=20 days, H=22.2 ~123m) from Spacewatch 1.8m (Jan. 18.32-33p2)
K11X00F 2011 XF (arc=48 days, H=22.7 ~98m) from Spacewatch 1.8m (Jan. 18.31p3)
K12A11C 2012 AC11 (arc=4 days, H=21.8 ~148m) from Holmes/CTIO (Jan. 18.20-21p3)
K11V05O 2011 VO5 (arc=77 days, H=21.8 ~148m) from Holmes/CTIO (Jan. 18.10-11p3)
Observations of other asteroidal objects
K12A13C 2012 AC13 (arc=5 days, H=19.6 ~407m) from CSS (Jan. 13.39-41p4), Les Engarouines Obs. (Jan. 16.95-96p3 & 17.97-98p3), and MLS (Jan. 18.29-30p4)
K12A01E 2012 AE1 (arc=17 days, H=19.0 ~537m) from Castelmartini Obs. (Jan. 17.94-95p3), PJMSO (Jan. 18.33-34p6), and Galati Obs. (Jan. 18.69p2)
K11Y62U 2011 YU62 (Q=4.771 AU, arc=21 days, H=17.5 ~1.07 km) from DGRO-RH (Jan. 18.17p3) and Los Campitos Obs. (Jan. 19.19-21p3)
K11Y40D 2011 YD40 (arc=20 days, H=21.0 ~214m) from Spacewatch 1.8m (Jan. 18.34p3)
K11Y28G 2011 YG28 (Q=4.527 AU, arc=22 days, H=21.4 ~178m) from CSS (Jan. 18.42-44p4)
K11Y15V 2011 YV15 (Q=4.391 AU, arc=56 days, H=17.1 ~1.29 km) from Castelmartini Obs. (Jan. 18.04p3) and Vicksburg Obs. (Jan. 18.41-42p3)
K11Y10X 2011 YX10 (arc=24 days, H=21.5 ~170m) from Spacewatch 1.8m (Jan. 18.27-28p3)
K11X03O 2011 XO3 (Q=5.386 AU, arc=48 days, H=16.7 ~1.55 km) from New Millennium Obs. (Jan. 13.85-86p2), Hidetaka Sato via RAS Obs. Mayhill (Jan. 14.21-22p3), and PJMSO (Jan. 18.16-17p6)
K11X02S 2011 XS2 (arc=35 days, H=18.2 ~776m) from SSS (Jan. 17.45-46p2)
K11X01E 2011 XE1 (arc=46 days, H=18.2 ~776m) from Castelmartini Obs. (Jan. 17.96p3) and PJMSO (Jan. 18.28-29p6)
K11X00E 2011 XE (arc=48 days, H=19.3 ~467m) from Holmes/CTIO (Jan. 18.03-05p4)
K11WD4V 2011 WV134 (Q=4.676 AU, arc=2 opp, H=17.1 ~1.29 km) from New Millennium Obs. (Jan. 13.82p2 & 13.87p2) and PJMSO (Jan. 18.17-18p6)
K11W95U 2011 WU95 (arc=49 days, H=19.1 ~513m) from Trueblood/KPNO (Jan. 18.19-22p3 at R=22.1-6)
K11W44E 2011 WE44 (arc=54 days, H=20.7 ~245m) from Holmes/CTIO (Jan. 18.13-14p3)
K11W15N 2011 WN15 (q=0.173 AU, arc=58 days, H=19.6 ~407m) from Trueblood/KPNO (Jan. 18.12-14p3) and Spacewatch 1.8m (Jan. 19.21-23p3)
K11W04W 2011 WW4 (arc=2 opp, H=18.6 ~645m) from Spacewatch 1.8m (Jan. 18.22-24p3)
K11V12P 2011 VP12 (arc=63 days, H=21.0 ~214m) from Spacewatch 1.8m (Jan. 18.26-27p3)
K11V05U 2011 VU5 (arc=76 days, H=20.3 ~295m) from Trueblood/KPNO (Jan. 18.51-53p3)
K11UA6U 2011 UU106 (arc=2 opp, H=18.7 ~616m) from LINEAR (Jan. 18.08-12p4)
K11SA2L 2011 SL102 (arc=3 opp, H=18.2 ~776m) from PJMSO (Jan. 18.24-26p6)
K11S69R 2011 SR69 (arc=116 days, H=20.1 ~323m) from LINEAR (Jan. 18.35-40p5)
K11P01O 2011 PO1 (Q=4.116 AU, arc=167 days, H=20.9 ~224m) from Trueblood/KPNO (Jan. 18.36-38p3)
K11P00S 2011 PS (arc=169 days, H=20.4 ~282m) from Trueblood/KPNO (Jan. 18.41-42p3)
K11O15R 2011 OR15 (arc=176 days, H=21.2 ~195m) from Trueblood/KPNO (Jan. 18.39-40p3 at R=22.0-22.1)
K11M05E 2011 ME5 (i=37.3°, arc=203 days, H=19.6 ~407m) from Spacewatch 1.8m (Jan. 19.10p2)
K11L19C 2011 LC19 (Q=5.550 AU, arc=2 opp, H=18.9 ~562m) from Trueblood/KPNO (Jan. 18.24-25p3)
K09Q08E 2009 QE8 (arc=3 opp, H=18.0 ~851m) from MLS (Jan. 18.48-49p4 at V=21.5-22.2)
K08W13Z 2008 WZ13 (arc=2 opp, H=18.6 ~645m) from New Millennium Obs. (Jan. 13.89p2), Castelmartini Obs. (Jan. 17.94p3), PJMSO (Jan. 18.22-23p6), Galati Obs. (Jan. 18.71p2), and Wishing Star Obs. (Jan. 19.01-02p3)
K08Q00Y 2008 QY (arc=3 opp, H=18.4 ~708m) from Castelmartini Obs. (Jan. 18.09p3)
K08N01S 2008 NS1 (Q=4.368 AU, arc=2 opp, H=17.3 ~1.17 km) from CSS (Jan. 18.08-09p4) and Spacewatch 1.8m (Jan. 18.12-13p3)
K06V13Y 2006 VY13 (Q=4.718 AU, arc=2 opp, H=17.3 ~1.17 km) from Galati Obs. (Jan. 19.11-12p10)
K06M10J 2006 MJ10 (i=39.3°, arc=4 opp, H=18.7 ~616m) from PJMSO (Jan. 18.30p5)
K05N01J 2005 NJ1 (arc=5 opp, H=18.5 ~676m) from Wishing Star Obs. (Jan. 18.99p3)
K05J22A 2005 JA22 (arc=3 opp, H=18.6 ~645m) from Holmes/CTIO (Jan. 18.03-05p4)
K04Y05U 2004 YU5 (arc=2 opp, H=18.8 ~589m) from New Millennium Obs. (Jan. 13.85p2)
K04J02O 2004 JO2 (arc=3 opp, H=17.3 ~1.17 km) from Holmes/CTIO (Jan. 18.04-05p3)
K03B33X 2003 BX33 (arc=4 opp, H=20.9 ~224m) from CSS (Jan. 18.45-47p4)
K03A23F 2003 AF23 (arc=2 opp, H=20.9 ~224m) from Chelmsford Obs. (Jan. 13.95p2) and PJMSO (Jan. 18.21-22p7)
J96A02E 1996 AE2 (i=37.4°, arc=2 opp, H=20.3 ~295m) from Castelmartini Obs. (Jan. 18.02p3), LINEAR (Jan. 18.34-39p5), PJMSO (Jan. 18.36p6), Vicksburg Obs. (Jan. 18.39-40p3), and Galati Obs. (Jan. 19.07-09p10)
V0842 310842 2003 AK18 from Galati Obs. (Jan. 18.72p2)
V0442 310442 2000 CH59 from Castelmartini Obs. (Jan. 17.98p3) and PJMSO (Jan. 18.31-32p5)
S9315 289315 2005 AN26 from PJMSO (Jan. 18.29p5)
R5792 275792 2001 QH142 from CSS (Jan. 18.48-50p4)
K9924 209924 2005 WS55 from New Millennium Obs. (Jan. 13.79p1 & 13.84p2)
K2435 202435 2005 XH8 from New Millennium Obs. (Jan. 13.81-82p3 & 13.86-87p3)
H2034 172034 2001 WR1 from CSS (Jan. 18.08-10p4)
G3693 163693 Atira (2003 CP20) from Galati Obs. (Jan. 19.17-18p4)
G3000 163000 2001 SW169 from CSS (Jan. 18.36-39p3)
G2038 162038 1996 DH from CSS (Jan. 18.45-47p4)
E3651 143651 2003 QO104 from PJMSO (Jan. 18.37-38p5) and Galati Obs. (Jan. 19.06-07p9)
E2563 142563 2002 TR69 from Galati Obs. (Jan. 19.09-10p6)
E2348 142348 2002 RX211 from LINEAR (Jan. 18.34-39p5) and PJMSO (Jan. 18.36-37p5)
E1498 141498 2002 EZ16 from LINEAR (Jan. 18.22-27p5)
D8524 138524 2000 OJ8 from PJMSO (Jan. 18.35-36p5)
D7805 137805 1999 YK5 from New Millennium Obs. (Jan. 13.78-83p5)
D7084 137084 1998 XS16 from New Millennium Obs. (Jan. 13.79-84p5)
A1873 101873 1999 NC5 from CSS (Jan. 18.48-50p4)
96536 96536 1998 SO10 from SSS (Jan. 12.51-55p4)
90147 90147 2002 YK14 from New Millennium Obs. (Jan. 13.79-84p5)
85709 85709 1998 SG36 from LINEAR (Jan. 18.16-20p4)
85628 85628 1998 KV2 from Galati Obs. (Jan. 19.15-16p5)
42286 42286 2001 TN41 from New Millennium Obs. (Jan. 13.79-84p6)
24475 24475 2000 VN2 from New Millennium Obs. (Jan. 13.85p2)
21277 21277 1996 TO5 from LINEAR (Jan. 18.49-53p4)
21088 21088 1992 BL2 from New Millennium Obs. (Jan. 13.90p2)
20826 20826 2000 UV13 from New Millennium Obs. (Jan. 13.78-83p4)
16834 16834 1997 WU22 from Crni Vrh Obs. (Jan. 17.88-92p4)
10145 10145 1994 CK1 from New Millennium Obs. (Jan. 13.89p2)
08567 8567 1996 HW1 from New Millennium Obs. (Jan. 13.87-88p2) and Galati Obs. (Jan. 18.73-74p2)
06455 6455 1992 HE from Galati Obs. (Jan. 19.12-13p4)
06050 6050 Miwablock (1992 AE) from CSS (Jan. 18.35-38p4)
04183 4183 Cuno (1959 LM) from New Millennium Obs. (Jan. 13.78p2 & 13.83p2)
03691 3691 Bede (1982 FT) from New Millennium Obs. (Jan. 13.83p2)
03200 3200 Phaethon (1983 TB) from New Millennium Obs. (Jan. 13.79-84p5)
02340 2340 Hathor (1976 UA) from LINEAR (Jan. 18.16-19p3)
01943 1943 Anteros (1973 EC) from New Millennium Obs. (Jan. 13.80-85p5)
01627 1627 Ivar (1929 SH) from New Millennium Obs. (Jan. 13.89p2)
01620 1620 Geographos (1951 RA) from New Millennium Obs. (Jan. 13.82-83p2 & 13.87p2)
01036 1036 Ganymed (1924 TD) from New Millennium Obs. (Jan. 13.80p2 & 13.85p1)

Observers on 19 January '12

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

Code	Observer / observatory
`160`	Castelmartini 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
`703`	Catalina 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
`970`	Chelmsford Obs. in England, 1 in MPEC 2012-B07 -- 2003 AF23
`850`	Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2012-B07 -- 433
`106`	Crni Vrh Obs. in Slovenia, 1 in MPEC 2012-B07 -- 16834
`G48`	Doc 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
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2012-B20 -- 2012 BB2
`C73`	Galati 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
`704`	LINEAR 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
`J87`	La Canada Obs. in Spain, 1 in MPEC 2012-B20 -- 2012 BB2
`A14`	Les Engarouines Obs. in France, 1 in MPEC 2012-B07 -- 2012 AC13
`J131`	National Schools Obs. via the Liverpool Telescope in the Canary Islands, 1 in MPEC 2012-B07 -- 2011 YH40
`I36`	Los Campitos Obs. in Argentina, 1 in MPEC 2012-B07 -- 2011 YU62
`G96`	Mt. 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
`566`	NEAT's GEODSS Haleakala telescope in Hawaii, 1 in MPEC 2012-B21 -- 2011 XZ1
`A24`	New 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
`H45`	Petit 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
`461`	SZTE Asteroid Program in Hungary, 1 in MPEC 2012-B20 -- 2012 BB2
`104`	San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2012-B14, 2012-B15, 2012-B17 & 2012-B20 -- 2012 BX1, 2012 BU1, 2012 BT1, 2012 BB2
`H36`	Sandlot Obs. in Kansas, 2 in MPECs 2012-B17 & 2012-B20 -- 2012 BX1, 2012 BB2
`E12`	Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2012-B07 -- 2012 AQ10, 2011 XS2, 96536
`691`	Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2012-B07 -- 192642, 141018
`291`	Spacewatch 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
`H47`	Vicksburg Obs. in Mississippi, 2 in MPEC 2012-B07 -- 2011 YV15, 1996 AE2
`I15`	Wishing 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 BU1	JPL Sentry	2359	2057-2112	33	1.8e-04	-5.32	-5.89	0	JPL: "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 AP10	JPL Sentry	1548	2069-2111	82	9.7e-05	-5.07	-5.81	0	JPL: "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 WL2	JPL Sentry	1548	2098	1	8.8e-07	-4.25	-4.25	0	JPL: "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.
2011 WL2	NEODyS	1548	2083-2083	1	1.67e-09	-6.88	-6.88	0	NEODyS: "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 1/20	Updated Traffic Report
2359	Noted 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
2207	Grabbed 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
1740	Grabbed MPEC 2012-B08 - Deletion of 2011 YH74 - see above
1548	Noted 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

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