2012-01-31 Tracking News

Contents on 31 January '12

Traffic Report -- two objects
Radar Astrometry -- two objects
IAU Minor Planet Center
- NEOCP Activity -- 46 listings
- New MPECs -- six MPECs
Observers -- 28 observers
Impact Risk Monitoring -- five objects
Chronology

Note: These A/CC news pages will update less often and less regularly than usual through Thursday, February 2nd, and possibly later.

Resources:

Consolidated Risk Tables - the CRT page (archive)
Of 437 risk-listed objects, 29 have had news in the last 31 days. Updated at 2134 UTC on 31 Jan.
Earth's Busy Neighborhood close passer EBN Traffic Report
Two objects are known to be within ten LD of Earth today. Updated at 0006 UTC on 31 Jan.
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 27 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 31 January '12

Two objects reported inside ten LD

There are two objects reported passing inside ten lunar distances (LD) of our planet today. 2012 BD14 is heading out from 5.79 to 6.04 LD and intruder 2012 BX34 is departing, traveling from 7.11 to 9.21 LD, and 2012 BA102 departs from ten LD tomorrow. Next up, radar target 2011 CP4 arrives inside ten LD on February 22nd.

This report was updated at 2325 UTC with follow-up for 2012 BD14 in radar and today's DOU MPEC, approaching 2011 CP4 has been recovered (MPEC), 2012 BA102 has been discovered (MPEC), and there is follow-up in today's DOU for 2012 BO11 and distant 207398 2006 AS2. This report was previously updated at 0031 UTC.

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

Radar Astrometry on 31 January '12

Radar observation of two 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 0023 UTC when the database was dated 30 Jan.

2012 BD14 from Arecibo (Jan. 27.10 velocity)

Data update noted at 2359 UTC when the database was dated 31 Jan.

7341 1991 VK from Arecibo (Jan. 5.84 velocity, 5.84 range, 6.83 velocity & 6.83 range) and Goldstone DSS-14 70m antenna (Jan. 16.00 range & 20.92 range) - see links

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

NEOCP Activity on 31 January '12

The MPC's NEO Confirmation Page has 46 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 46 objects listed. Of these, 40 were "one nighters." So far The Tracking News has counted a total of 101 listings on the NEOCP today.

New MPECs on 31 January '12

Minor Planet Electronic Circulars

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

MPEC 2012-B110 time-stamped "06:05 UT" - Daily Orbit Update - see below
MPEC 2012-B111 time-stamped "15:32 UT" - P/2003 T12 = 2012 A3 (SOHO) - see below
MPEC 2012-B112 time-stamped "18:03 UT" - 2011 CP4 - see below
MPEC 2012-B113 time-stamped "19:23 UT" - 2012 BA102 - see below
MPEC 2012-B114 time-stamped "19:26 UT" - 2012 BB102 - see below
MPEC 2012-B115 time-stamped "19:38 UT" - 2012 BC102

MPEC 2012-B115 - "19:38 UT" - 2012 BC102

K12BA2C 2012 BC102 (small asteroid, Earth MOID=4.2 LD, H=23.9 ~56m) from LINEAR (Jan. 30.41-45p4) and the Mt. Lemmon Survey (MLS) (Jan. 31.48p4)

MPEC 2012-B114 - "19:26 UT" - 2012 BB102

K12BA2B 2012 BB102 (small asteroid, H=24.0 ~54m) from MLS (Jan. 30.39-42p4 & 31.31p3) and Magdalena Ridge Obs. (MRO) (Jan. 30.46-48p4 & 31.16-19p4)

MPEC 2012-B113 - "19:23 UT" - 2012 BA102

K12BA2A 2012 BA102 (risk-listed, Earth MOID=0.7 LD, i=2.4°, H=26.5 ~17m, close passer) from LINEAR (Jan. 30.21-26p5), MLS (Jan. 31.29p4), and Moriyama Obs. (Jan. 31.60-61p2)

MPEC 2012-B112 - "18:03 UT" - 2011 CP4

K11C04P 2011 CP4 (q=0.118 AU, Earth MOID=7.4 LD, H=21.2 ~195m, close passer, radar support) from NEAT's Mt. Palomar telescope (2002 Jan. 10.24-26p2) and Astronomical Research Obs. Westfield (Jan. 29.41-43p3 & 31.38-40p3)

MPEC 2012-B111 - "15:32 UT" - P/2003 T12 = 2012 A3 (SOHO)

PK03T120 P/2003 T12 (SOHO) (q=0.589 AU, Q=4.566 AU, TP=2003 Oct. 16.31038 TT) from Hidetaka Sato via RAS Obs. Mayhill (Jan. 30.06-07p4 & 31.06-07p3)

<< DOU on 31 Jan. '12 >> MPEC 2012-B110 - "06:05 UT" - Daily Orbit Update

Observations of risk-listed objects
K12B86J 2012 BJ86 (almost small, arc=2 days, H=21.8 ~148m) from Great Shefford Obs. (Jan. 30.83-85p2)
K12B61U 2012 BU61 (Q=4.324 AU, arc=5 days, H=21.0 ~214m) from the Spacewatch 1.8m telescope (Jan. 31.13p3)
K12B11O 2012 BO11 (small asteroid, arc=11 days, H=26.0 ~21m, close passer) from the Spacewatch 0.9m telescope (Jan. 30.25-29p3)
A1955 101955 1999 RQ36 (PMD) from MRO (Jan. 30.47-52p4)
Observations of recently (no longer) risk-listed objects
K12B11N 2012 BN11 (arc=11 days, H=20.9 ~224m) from Spacewatch 1.8m (Jan. 30.55p3)
K12B11K 2012 BK11 (small asteroid, arc=11 days, H=23.0 ~85m) from Spacewatch 1.8m (Jan. 30.50p3)
K11Y28J 2011 YJ28 (arc=34 days, H=21.2 ~195m) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Jan. 30.03-05p3)
Observations of close-passing objects
K12B14D 2012 BD14 (arc=10 days, H=26.5 ~17m, close passer) from ARO Westfield (Jan. 30.03-05p7)
K7398 207398 2006 AS2 (close passer) from MLS (Jan. 30.17-19p3)
Observation campaigns (radar support, potential mission destinations)
K11Y74U 2011 YU74 (arc=34 days, H=23.0 ~85m, PMD candidate) from Petit Jean Mtn. South Obs. (PJMSO) (Jan. 30.29p6)
K08G01E 2008 GE1 (arc=3 opp, H=19.6 ~407m, PMD) from PJMSO (Jan. 30.28-29p6)
K02B25F 2002 BF25 (arc=3 opp, H=22.3 ~117m, PMD) from MLS (Jan. 29.17-19p4)
K02A00W 2002 AW (arc=3 opp, H=20.7 ~245m, PMD) from MLS (Dec. 27.41-43p5)
Q3976 263976 2009 KD5 (radar) from PJMSO (Jan. 30.41-42p6)
P6004 256004 2006 UP (PMD) from the Sloan Digital Sky Survey (SDSS) (2006 Oct. 23.47p4)
J2642 192642 1999 RD32 (radar) from LINEAR (Jan. 30.27-32p5)
J0491 190491 2000 FJ10 (PMD) from SDSS (2000 May 4.28-29p2)
E1018 141018 2001 WC47 (PMD, radar) from MLS (Jan. 30.30-32p4) and PJMSO (Jan. 30.34-35p5)
D8911 138911 2001 AE2 (PMD) from LINEAR (Jan. 30.15-20p4)
65803 65803 Didymos (1996 GT) (PMD) from SDSS (2003 Nov. 20.28p5)
29075 29075 1950 DA (radar) from Atlante Obs. (Jan. 30.89-91p3)
00433 433 Eros (1898 DQ) (radar) from North Obs. (Jan. 30.92-93p4)
-- Potential mission destinations list & ephemerides -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K12B77M 2012 BM77 (arc=3 days, H=23.8 ~59m) from ARO Westfield (Jan. 30.01-02p5)
K12B77L 2012 BL77 (arc=5 days, H=23.3 ~74m) from Spacewatch 1.8m (Jan. 31.18p3)
K12B77K 2012 BK77 (arc=4 days, H=22.4 ~112m) from ARO Westfield (Jan. 30.17-19p3)
K12B77F 2012 BF77 (arc=4 days, H=24.6 ~41m) from Great Shefford Obs. (Jan. 30.81-82p3)
K12B14F 2012 BF14 (arc=10 days, H=23.7 ~62m) from ARO Westfield (Jan. 30.22-24p3 at V=22.1)
K12A11C 2012 AC11 (arc=17 days, H=22.2 ~123m) from Spacewatch 1.8m (Jan. 31.15-16p3)
K11Y63M 2011 YM63 (arc=30 days, H=22.2 ~123m) from Spacewatch 1.8m (Jan. 30.54p3)
K11Y63A 2011 YA63 (arc=30 days, H=24.6 ~41m) from Spacewatch 1.8m (Jan. 30.29-30p3)
K08GB0E 2008 GE110 (arc=3 opp, H=22.3 ~117m) from SDSS (2005 March 10.31p2 at r=22.54)
K06Q05X 2006 QX5 (arc=58 days, H=23.8 ~59m) from SDSS (2006 Sept. 18.15p2)
K05W57P 2005 WP57 (arc=40 days, H=23.4 ~71m) from SDSS (2005 Dec. 6.40-41p3 at g=20.79-22.08)
K05Q30G 2005 QG30 (arc=54 days, H=22.2 ~123m) from SDSS (2005 Sept. 25.18-19p3)
K05EG9Z 2005 EZ169 (arc=23 days, H=25.3 ~29m) from SDSS (2005 March 12.16p2)
K03B04N 2003 BN4 (arc=84 days, H=24.4 ~45m) from SDSS (2002 Dec. 31.34-35p2)
K02M00Y 2002 MY (arc=61 days, H=22.3 ~117m) from SDSS (2002 May 30.39p3)
K12B11J 2012 BJ11 (arc=11 days, H=21.9 ~141m) from Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) (Jan. 20.17p2) and ARO Westfield (Jan. 30.15-17p5)
K12B11F 2012 BF11 (arc=11 days, H=21.8 ~148m) from Spacewatch 1.8m (Jan. 30.21-23p3)
K07D41M 2007 DM41 (arc=2 opp, H=21.9 ~141m) from SDSS (2008 Oct. 25.41p4)
Observations of other asteroidal objects
K12B77N 2012 BN77 (Q=4.008 AU, arc=5 days, H=19.4 ~446m) from Desert Moon Obs. (Jan. 30.32p1, 30.36p1 & 30.41p1)
K12B77B 2012 BB77 (arc=5 days, H=19.0 ~537m) from ARO Westfield (Jan. 30.26p3)
K12B27D 2012 BD27 (i=40.8°, arc=9 days, H=19.7 ~389m) from ARO Westfield (Jan. 30.23-25p5)
K12B23T 2012 BT23 (arc=10 days, H=19.1 ~513m) from PJMSO (Jan. 30.31-32p8)
K12B23R 2012 BR23 (arc=10 days, H=21.4 ~178m) from Spacewatch 1.8m (Jan. 30.23-24p2)
K12B13X 2012 BX13 (i=44.5°, arc=11 days, H=20.0 ~339m) from ARO Westfield (Jan. 30.22-23p4)
K12B02B 2012 BB2 (arc=13 days, H=20.6 ~257m) from ARO Westfield (Jan. 30.06-07p4)
K12A11A 2012 AA11 (arc=16 days, H=20.1 ~323m) from ARO Westfield (Jan. 30.06-08p5)
K12A01E 2012 AE1 (arc=29 days, H=19.0 ~537m) from ARO Westfield (Jan. 30.12-14p4), the Catalina Sky Survey (CSS) (Jan. 30.25-26p4), and PJMSO (Jan. 30.27-28p6)
K11WD4V 2011 WV134 (Q=4.676 AU, arc=2 opp, H=17.0 ~1.35 km) from CSS (Jan. 30.17-19p4)
K11UA6U 2011 UU106 (arc=2 opp, H=18.7 ~616m) from Desert Moon Obs. (Jan. 30.08-09p3)
K11SA2L 2011 SL102 (arc=3 opp, H=18.2 ~776m) from PJMSO (Jan. 30.33-34p6)
K11S25F 2011 SF25 (arc=131 days, H=21.2 ~195m) from ARO Westfield (Jan. 30.16-19p3 at V=21.9-22.2)
K09T04V 2009 TV4 from SDSS (2009 Oct. 18.17p3)
K09R04D 2009 RD4 (Q=4.364 AU, arc=42 days, H=20.5 ~269m) from SDSS (2009 Oct. 17.27p4)
K09O00C 2009 OC (arc=2 opp, H=20.2 ~309m) from SDSS (2009 Sept. 16.33p8 & 2009 Sept. 28.37p4)
K09L00X 2009 LX (Q=4.539 AU, arc=128 days, H=19.3 ~467m) from SDSS (2009 Oct. 16.35p4 & 2009 Oct. 17.33p4)
K09B05T 2009 BT5 (arc=3 opp, H=20.6 ~257m) from SDSS (2006 Jan. 6.49p2 at g=21.22-22.12)
K08W13Z 2008 WZ13 (arc=2 opp, H=18.6 ~645m) from Hamamatsu-Yuto Obs. (Jan. 30.48p2 & 30.54-57p5)
K08TF7K 2008 TK157 (arc=161 days, H=20.6 ~257m) from SDSS (2008 Oct. 29.38-39p4)
K08S00O 2008 SO (arc=2 opp, H=20.7 ~245m) from SDSS (2008 Oct. 3.39p4, 2008 Oct. 8.39p4 & 2008 Oct. 30.28p3)
K08R24X 2008 RX24 (arc=74 days, H=21.4 ~178m) from SDSS (2008 Oct. 25.21-22p3)
K08Q00Y 2008 QY (arc=3 opp, H=18.6 ~645m) from PJMSO (Jan. 30.38-39p6)
K08Q00C 2008 QC (arc=92 days, H=20.7 ~245m) from SDSS (2008 Oct. 8.39p4, 2008 Oct. 29.35-36p3 & 2008 Nov. 2.34p3)
K08O08X 2008 OX8 (arc=91 days, H=21.6 ~162m) from SDSS (2008 Oct. 2.09-10p2)
K08M01H 2008 MH1 (Q=4.264 AU, arc=144 days, H=18.3 ~741m) from SDSS (2008 Nov. 19.19p4)
K08J24O 2008 JO24 (arc=3 opp, H=18.9 ~562m) from SDSS (2003 March 24.27-28p3)
K08A33G 2008 AG33 (arc=3 opp, H=19.6 ~407m) from SDSS (2003 Sept. 27.40-41p2, 2003 Sept. 30.34-35p4, 2003 Oct. 19.28p6 & 2005 Dec. 6.34-35p3)
K08A31B 2008 AB31 (arc=5 opp, H=20.2 ~309m) from LINEAR (Jan. 30.16-20p4)
K07T68W 2007 TW68 (arc=3 opp, H=19.3 ~467m) from SDSS (1999 March 22.29-30p2)
K07D56B 2007 DB56 (arc=4 opp, H=19.2 ~490m) from SDSS (2000 Nov. 30.22-23p3 & 2004 April 16.16p2)
K06W01N 2006 WN1 (arc=2 opp, H=18.7 ~616m) from SDSS (2006 Nov. 21.44p3)
K06V13Y 2006 VY13 (Q=4.718 AU, arc=2 opp, H=17.3 ~1.17 km) from PJMSO (Jan. 30.38p5)
K06M10J 2006 MJ10 (i=39.3°, arc=4 opp, H=18.6 ~645m) from CSS (Jan. 30.34-36p4)
K05X77W 2005 XW77 (arc=3 opp, H=20.7 ~245m) from SDSS (2007 Dec. 4.11-12p4)
K05S19G 2005 SG19 (Q=4.168 AU, arc=3 opp, H=16.6 ~1.62 km) from SDSS (2000 April 4.22p2)
K05QH6S 2005 QS176 (arc=103 days, H=21.6 ~162m) from SDSS (2005 Sept. 12.35p4)
K05H00B 2005 HB (Q=4.359 AU, arc=151 days, H=21.0 ~214m) from SDSS (2005 June 9.33p4)
K05C25V 2005 CV25 (arc=4 opp, H=19.7 ~389m) from MLS (Jan. 30.39-42p4)
K04R84D 2004 RD84 (arc=2 opp, H=18.9 ~562m) from SDSS (2004 Oct. 10.10p3)
K04R25S 2004 RS25 (arc=3 opp, H=20.2 ~309m) from SDSS (2004 Oct. 18.32-33p3 & 2004 Oct. 20.37-38p4)
K04Q20G 2004 QG20 (arc=3 opp, H=19.2 ~490m) from SDSS (2004 Oct. 8.42p4)
K04M03P 2004 MP3 (arc=3 opp, H=18.4 ~708m) from SDSS (2000 Sept. 27.47-48p2)
K03U25P 2003 UP25 from SDSS (2003 Oct. 24.24p3)
K03S11C 2003 SC11 (i=43.5°, arc=2 opp, H=20.2 ~309m) from SDSS (2004 April 16.14-15p2 at g=21.45-22.13)
K03R10W 2003 RW10 (arc=3 opp, H=19.3 ~467m) from SDSS (2003 Nov. 20.10p2)
K03D06E 2003 DE6 (arc=3 opp, H=19.1 ~513m) from Spacewatch 1.8m (Jan. 30.52-53p3)
K02X01O 2002 XO1 (Q=4.423 AU, arc=91 days, H=20.7 ~245m) from SDSS (2002 Oct. 31.34-35p4)
K02G01F 2002 GF1 (arc=4 opp, H=20.5 ~269m) from SDSS (2005 June 6.23-24p3)
K02B26P 2002 BP26 (arc=3 opp, H=19.0 ~537m) from SDSS (2009 Sept. 16.33p2)
K02A29H 2002 AH29 (arc=111 days, H=21.5 ~170m) from SDSS (2002 Feb. 13.45p4)
K01V05J 2001 VJ5 (arc=26 days, H=21.2 ~195m) from SDSS (2001 Nov. 12.40p4)
K01D08S 2001 DS8 from SDSS (2001 Feb. 22.38p4)
K01A02O 2001 AO2 (Q=4.931 AU, arc=3 opp, H=18.0 ~851m) from Spacewatch 1.8m (Jan. 30.53p3)
J99V06N 1999 VN6 (arc=3 opp, H=19.5 ~426m) from SDSS (2008 Dec. 30.14p2)
J99A23U 1999 AU23 (arc=3 opp, H=17.6 ~1.02 km) from NEAT's GEODSS Haleakala telescope (1995 Dec. 19.60-64p3) and Tim Lister via Faulkes Telescope North (Jan. 30.47-48p6)
R6786 276786 2004 KD1 from SDSS (2002 Dec. 6.27p4)
M1455 221455 2006 BC10 from MLS (Jan. 30.53-54p3)
I9973 189973 2003 XE11 from SDSS (2009 Jan. 16.09-10p8)
I9700 189700 2001 TA45 from SDSS (2006 Jan. 31.44-45p2 & 2008 Dec. 22.19p5)
I5853 185853 2000 ER70 from SDSS (2003 June 7.34-35p6)
G3760 163760 2003 OR14 from SDSS (1999 Oct. 8.19p4) and Desert Moon Obs. (Jan. 30.11-13p3)
G3000 163000 2001 SW169 from SDSS (2008 Oct. 30.22p8) and CSS (Jan. 30.37-38p3)
G2186 162186 1999 OP3 from Atlante Obs. (Jan. 30.92-94p3)
G2038 162038 1996 DH from LINEAR (Jan. 30.27-37p8)
F9923 159923 2004 YJ32 from SDSS (2007 April 15.28p4 & 2007 April 20.30-31p2)
F4991 154991 Vinciguerra (2005 BX26) from SDSS (2008 Oct. 1.48p3)
F4269 154269 2002 SM from CSS (Jan. 30.25-27p4)
F4007 154007 2002 BY from MLS (Jan. 30.47-50p4)
E3651 143651 2003 QO104 from MLS (Jan. 30.20-23p4) and PJMSO (Jan. 30.32-33p5)
E2563 142563 2002 TR69 from PJMSO (Jan. 30.41p5)
E2348 142348 2002 RX211 from MLS (Jan. 30.35-38p4)
D8847 138847 2000 VE62 from SDSS (1998 Nov. 19.27p4 & 2008 Oct. 2.38p4)
D8524 138524 2000 OJ8 from PJMSO (Jan. 30.30p5)
D8155 138155 2000 ES70 from Pan-STARRS 1 (PS1) (Jan. 29.26-27p4 & 30.24-25p4)
D7044 137044 1998 UC50 from SDSS (2008 Oct. 25.19-20p3)
A1873 101873 1999 NC5 from New Millennium Obs. (Jan. 26.15p2 & 26.21p2) and CSS (Jan. 30.28-30p4)
85839 85839 1998 YO4 from CSS (Jan. 30.20-22p4)
69230 69230 Hermes (1937 UB) from SDSS (2003 Oct. 23.27p1 & 2003 Oct. 24.25-26p4)
35396 35396 1997 XF11 from LINEAR (Jan. 30.21-26p5)
24445 24445 2000 PM8 from SDSS (2003 Oct. 23.07p4)
21277 21277 1996 TO5 from LINEAR (Jan. 30.34-38p3)
19356 19356 1997 GH3 from SDSS (2003 Sept. 26.28p2 & 2003 Sept. 28.29p2)
14402 14402 1991 DB from SDSS (2003 Oct. 23.35-36p2 & 2003 Oct. 24.35p2)
10636 10636 1998 QK56 from Spacewatch 0.9m (Jan. 30.49-51p3)
05587 5587 1990 SB from SDSS (1998 Nov. 16.35p4, 1998 Nov. 19.34p4, 1998 Nov. 21.33p4, 1998 Nov. 22.33p4 & 2001 May 18.27p4)
04055 4055 Magellan (1985 DO2) from CSS (Jan. 30.46-49p4)
03554 3554 Amun (1986 EB) from Ondrejov Obs. (Jan. 30.14p1, 30.18p1 & 30.23p1)
03103 3103 Eger (1982 BB) from ISON-NM Obs. (Jan. 30.34-38p4) and CSS (Jan. 30.37-39p4)
01866 1866 Sisyphus (1972 XA) from San Vito Obs. (Jan. 30.77-80p3)
01627 1627 Ivar (1929 SH) from LINEAR (Jan. 30.14-19p5)
01620 1620 Geographos (1951 RA) from Ondrejov Obs. (Dec. 30.88p1, 30.93p1 & 31.08-11p2)
01221 1221 Amor (1932 EA1) from LINEAR (Jan. 30.48-52p4)

Observers on 31 January '12

A total of 28 observers appear in today's MPECs.

Code	Observer / observatory
`251`	Arecibo in Puerto Rico, 2 in radar -- 2012 BD14, 7341
`H21`	Astronomical Research Obs. Westfield in Illinois, 13 in MPECs 2012-B110 & 2012-B112 -- 2012 BX13, 2012 BM77, 2012 BK77, 2012 BJ11, 2012 BF14, 2012 BD27, 2012 BD14, 2012 BB77, 2012 BB2, 2012 AE1, 2012 AA11, 2011 SF25, 2011 CP4
`J51`	Atlante Obs. in the Canary Islands, 2 in MPEC 2012-B110 -- 29075, 162186
`703`	Catalina Sky Survey (CSS) in Arizona, 9 in MPEC 2012-B110 -- 2012 AE1, 2011 WV134, 2006 MJ10, 85839, 163000, 154269, 101873, 4055, 3103
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2012-B110 -- 2011 YJ28
`448`	Desert Moon Obs. in New Mexico, 3 in MPEC 2012-B110 -- 2012 BN77, 2011 UU106, 163760
`G48`	Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2012-B110 -- 2012 BJ11
`F65%`	Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-B110 -- 1999 AU23
`253`	Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 7341
`J95`	Great Shefford Obs. in England, 2 in MPEC 2012-B110 -- 2012 BJ86, 2012 BF77
`379`	Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2012-B110 -- 2008 WZ13
`H15`	ISON-NM Obs. in New Mexico, 1 in MPEC 2012-B110 -- 3103
`704`	LINEAR in New Mexico, 10 in MPECs 2012-B110, 2012-B113 & 2012-B115 -- 2012 BC102, 2012 BA102, 2008 AB31, 35396, 21277, 192642, 162038, 138911, 1627, 1221
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2012-B110 & 2012-B114 -- 2012 BB102, 101955
`900`	Moriyama Obs. in Japan, 1 in MPEC 2012-B113 -- 2012 BA102
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2012-B110, 2012-B113, 2012-B114 & 2012-B115 -- 2012 BC102, 2012 BB102, 2012 BA102, 2005 CV25, 2002 BF25, 2002 AW, 221455, 207398, 154007, 143651, 142348, 141018
`566`	NEAT's GEODSS Haleakala telescope in Hawaii, 1 in MPEC 2012-B110 -- 1999 AU23
`644`	NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2012-B112 -- 2011 CP4
`A24`	New Millennium Obs. in Italy, 1 in MPEC 2012-B110 -- 101873
`J69`	North Obs. in England, 1 in MPEC 2012-B110 -- 433
`557`	Ondrejov Obs. in the Czech Republic, 2 in MPEC 2012-B110 -- 3554, 1620
`F51`	Pan-STARRS 1 in Hawaii, 1 in MPEC 2012-B110 -- 138155
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 12 in MPEC 2012-B110 -- 2012 BT23, 2012 AE1, 2011 YU74, 2011 SL102, 2008 QY, 2008 GE1, 2006 VY13, 263976, 143651, 142563, 141018, 138524
`H06\|`	Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-B111 -- P/2003 T12
`233`	San Vito Obs. in Italy, 1 in MPEC 2012-B110 -- 1866
`645`	Sloan Digital Sky Survey (SDSS) in New Mexico, 60 in MPEC 2012-B110 -- 2009 TV4, 2009 RD4, 2009 OC, 2009 LX, 2009 BT5, 2008 TK157, 2008 SO, 2008 RX24, 2008 QC, 2008 OX8, 2008 MH1, 2008 JO24, 2008 GE110, 2008 AG33, 2007 TW68, 2007 DM41, 2007 DB56, 2006 WN1, 2006 QX5, 2005 XW77, 2005 WP57, 2005 SG19, 2005 QS176, 2005 QG30, 2005 HB, 2005 EZ169, 2004 RS25, 2004 RD84, 2004 QG20, 2004 MP3, 2003 UP25, 2003 SC11, 2003 RW10, 2003 BN4, 2002 XO1, 2002 MY, 2002 GF1, 2002 BP26, 2002 AH29, 2001 VJ5, 2001 DS8, 1999 VN6, 69230, 65803, 276786, 256004, 24445, 19356, 190491, 189973, 189700, 185853, 163760, 163000, 159923, 154991, 14402, 138847, 137044, 5587
`691`	Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2012-B110 -- 2012 BO11, 10636
`291`	Spacewatch 1.8m telescope in Arizona, 11 in MPEC 2012-B110 -- 2012 BU61, 2012 BR23, 2012 BN11, 2012 BL77, 2012 BK11, 2012 BF11, 2012 AC11, 2011 YM63, 2011 YA63, 2003 DE6, 2001 AO2

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

Impact Risk Monitoring on 31 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 BA102	JPL Sentry	2130	2093-2112	3	2.4e-06	-6.77	-6.87	0	JPL: "Analysis based on 11 observations spanning 1.3960 days (2012-Jan-30.21365 to 2012-Jan-31.60961)." Diameter approximately 0.017 km. from mean, weighted H=26.5.

2012 BM86	NEODyS	1934	2042-2083	4	2.3e-09	-6.87	-7.29	0	NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2012-01-29.558 to 2012-01-30.458."

2012 BJ86	JPL Sentry	1934	2085-2108	10	1.2e-06	-4.40	-4.80	0	JPL: "Analysis based on 28 observations spanning 1.7489 days (2012-Jan-29.10142 to 2012-Jan-30.8503)." Diameter approximately 0.150 km. from mean, weighted H=21.7.
2012 BJ86	NEODyS	1934	2085-2090	3	1.74e-07	-5.17	-5.18	0	NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2012-01-29.102 to 2012-01-30.851."

2012 BU61	JPL Sentry	1934	2031-2099	17	2.1e-06	-3.59	-3.91	0	JPL: "Analysis based on 29 observations spanning 5.0370 days (2012-Jan-26.0941 to 2012-Jan-31.13115)." Diameter approximately 0.210 km. from mean, weighted H=21.1.
2012 BU61	NEODyS	1934	2069-2090	6	3.19e-06	-3.47	-3.59	0	NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2012-01-26.095 to 2012-01-31.132."

2012 BO11	NEODyS	1934	2076-2076	1	6.0e-09	-8.82	-8.82	0	NEODyS: "Based on 46 optical observations (of which 1 are rejected as outliers) from 2012-01-19.493 to 2012-01-30.287."
2012 BO11	JPL Sentry	1934	R E M O V E D						JPL: Risk listing removed at 0853 UTC.

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 '12

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

2359	Noted Radar Astrometry database update - see above
2325	Updated Traffic Report
2130	Noted that JPL Sentry has posted 2012 BA102 as an impact risk - see above Grabbed MPEC 2012-B115 - 2012 BC102 - see above
1934	Noted that JPL Sentry has updated its 2012 BJ86 risk assessment - see above Noted that NEODyS has posted 2012 BJ86 as an impact risk - see above Noted that NEODyS has posted 2012 BM86 as an impact risk - see above Noted that JPL Sentry has removed 2012 BO11 as an impact risk - see above Noted that NEODyS has reposted 2012 BO11 as an impact risk - see above Noted that JPL Sentry has updated its 2012 BU61 risk assessment - see above Noted that NEODyS has updated its 2012 BU61 risk assessment - see above Grabbed MPEC 2012-B110 - Daily Orbit Update - see above Grabbed MPEC 2012-B111 - P/2003 T12 = 2012 A3 (SOHO) - see above Grabbed MPEC 2012-B112 - 2011 CP4 - see above Grabbed MPEC 2012-B113 - 2012 BA102 - see above Grabbed MPEC 2012-B114 - 2012 BB102 - see above
0023	Noted Radar Astrometry database update - see above

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