2012-03-18 Tracking News

Contents on 18 March '12

Traffic Report -- eight objects
IAU Minor Planet Center
- NEOCP Activity -- ten listings
- New MPECs -- seven MPECs
Observers -- 29 observers
Impact Risk Monitoring -- two objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page (archive)
Of 455 risk-listed objects, 36 have had news in the last 31 days. Updated at 1502 UTC on 18 March.
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 12 March
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 18 March '12

Eight objects reported inside ten LD

Eight asteroids are reported passing within ten lunar distances (LD) of Earth today. 2012 EN5 is outward bound from 4.91 to 7.06 LD, 2012 EJ5 from 7.11 to 7.74 LD, risk-listed radar target 2012 DW60 from 7.21 to 8.41 LD, 2012 EL8 from 7.4 to 7.6 LD*, newly announced 2012 FN from 8.7 to 9.2 LD*, and radar target 2012 DH54 from 8.79 to 9.79 LD. Newly discovered 2012 FM comes its closest to Earth on this passage, reaching 8.25 LD at 0110 UTC. And 2012 EO8 enters ten LD, passing from 11.04 to 8.43 LD.

Coming toward Earth next, risk-listed 2012 EK5 arrives inside ten LD tomorrow, intruder 2012 EG5 (risk-listed radar target) on March 27th, and 2007 HV4 on April 14th.

This report was updated at 1503 UTC with follow-up in today's DOU MPEC for 2012 FG, 2012 EO8, 2012 EL8, and 2012 EJ5, and, earlier, with new discoveries 2012 FN (MPEC) and 2012 FM (MPEC), which were announced late yesterday. This report was previously updated at 0504 UTC.

Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Object distances are interpreted by A/CC from JPL Horizons data. "LD*" indicates some passage uncertainty. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity on 18 March '12

The MPC's NEO Confirmation Page has 10 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had ten objects listed. Of these, five were "one nighters." So far The Tracking News has counted a total of 27 listings on the NEOCP today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs on 18 March '12

Minor Planet Electronic Circulars

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

MPEC 2012-F30 time-stamped "04:18 UT" - Comet C/2012 F1 (Gibbs) - see below
MPEC 2012-F31 time-stamped "04:30 UT" - Comet C/2012 F2 (Panstarrs) - see below
MPEC 2012-F32 time-stamped "04:44 UT" - Comet C/2012 F3 (Panstarrs) - see below
MPEC 2012-F33 time-stamped "06:02 UT" - Daily Orbit Update - see below
MPEC 2012-F34 time-stamped "20:20 UT" - 2012 FB1 - see below
MPEC 2012-F35 time-stamped "20:22 UT" - 2012 FC1 - see below
MPEC 2012-F36 time-stamped "20:24 UT" - 2012 FD1

MPEC 2012-F36 - "20:24 UT" - 2012 FD1

K12F01D 2012 FD1 (small asteroid, H=23.2 ~78m) from the Mt. Lemmon Survey (MLS) (March 17.30-33p4 & 17.40-41p4), Great Shefford Obs. (March 17.97-99p3), and Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (March 18.08-09p3)

MPEC 2012-F35 - "20:22 UT" - 2012 FC1

K12F01C 2012 FC1 (small asteroid, Q=4.260 AU, H=24.7 ~39m) from MLS (March 17.30-32p4 at V=20.1-7 & 17.37-43p13 at V=20.4-22.5), Magdalena Ridge Obs. (MRO) (March 17.37-40p3), Astronomical Research Obs. Westfield (March 17.39-41p2), and Great Shefford Obs. (March 18.07-10p4)

MPEC 2012-F34 - "20:20 UT" - 2012 FB1

K12F01B 2012 FB1 (small asteroid, H=24.2 ~49m) from MLS (March 17.30-32p4 & 17.40-42p8) and Great Shefford Obs. (March 18.00p1 & 18.05-06p2)

<< DOU on 18 Mar. '12 >> MPEC 2012-F33 - "06:02 UT" - Daily Orbit Update

Observations of recently (no longer) risk-listed objects
K12E11Y 2012 EY11 (arc=3 days, H=21.6 ~162m) from ARO Westfield (March 17.13-16p3)
K12E02B 2012 EB2 (small asteroid, arc=11 days, H=24.5 ~43m) from Schiaparelli Obs. (March 14.08-10p3)
K12D32Z 2012 DZ32 (arc=20 days, H=21.7 ~155m) from Desert Moon Obs. (March 17.39-45p3)
Observations of close-passing objects
K12F00G 2012 FG (arc=1 day, H=26.2 ~19m, close passer) from LINEAR (March 17.27-31p5)
K12E08O 2012 EO8 (arc=2 days, H=24.2 ~49m, close passer) from KLENOT (March 16.91p6)
K12E08L 2012 EL8 (arc=1 day, H=28.3 ~7m, close passer) from Schiaparelli Obs. (March 15.15-17p2)
K12E05J 2012 EJ5 (arc=4 days, H=27.7 ~10m, close passer) from ARO Westfield (March 17.39-41p6)
Observation campaigns (radar support, potential mission destinations)
H3664 173664 2001 JU2 (PMD) from MLS (March 17.27-29p4)
D6618 136618 1994 CN2 (PMD) from the Catalina Sky Survey (CSS) (March 17.28-31p4)
29075 29075 1950 DA (radar) from New Millennium Obs. (March 14.79p2 & 14.84p1)
-- Potential mission destinations list & ephemerides -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K12E08K 2012 EK8 (arc=4 days, H=23.6 ~65m) from Galati Obs. (March 17.83-84p4)
K12E03N 2012 EN3 (arc=11 days, H=24.0 ~54m) from Schiaparelli Obs. (March 14.13-15p3)
K12D04M 2012 DM4 (arc=27 days, H=24.2 ~49m) from ARO Westfield (March 17.24-27p3 at V=22.4-8)
K12A00X 2012 AX (arc=75 days, H=23.8 ~59m) from ARO Westfield (March 17.34-38p3 at V=22.4-7)
K08CB9E 2008 CE119 (arc=2 opp, H=25.7 ~25m) from David Tholen's team on Mauna Kea (March 15.60-61p3 at R=22.1-3)
K12D31E 2012 DE31 (arc=22 days, H=21.9 ~141m) from ARO Westfield (March 17.18-22p3 at V=22.2-5)
K11U91P 2011 UP91 (arc=147 days, H=21.9 ~141m) from ARO Westfield (March 17.12-16p3 at V=22.4-6)
Observations of other asteroidal objects
K12F00J 2012 FJ (i=40.8°, arc=1 day, H=18.6 ~645m) from LINEAR (March 17.43-47p4)
K12E05L 2012 EL5 (Q=4.109 AU, arc=4 days, H=19.8 ~371m) from Bergen-Enkheim Obs. (March 16.94-10p6)
K12E05F 2012 EF5 (i=47.7°, arc=5 days, H=21.3 ~186m) from ARO Westfield (March 17.05p3)
K12E02A 2012 EA2 (arc=16 days, H=19.3 ~467m) from Schiaparelli Obs. (March 13.86-89p3) and ARO Westfield (March 17.06-07p4)
K12D75X 2012 DX75 (arc=18 days, H=20.4 ~282m) from Klet Obs. (March 15.93p5), Castelmartini Obs. (March 17.03-04p3), and An Carraig Obs. (March 18.01-02p3)
K12D61F 2012 DF61 (arc=17 days, H=20.5 ~269m) from Schiaparelli Obs. (March 10.00-02p2)
K12D31G 2012 DG31 (arc=22 days, H=20.0 ~339m) from ARO Westfield (March 17.42-43p3)
K12D04H 2012 DH4 (arc=29 days, H=20.7 ~245m) from Klet Obs. (March 15.92-93p5), Castelmartini Obs. (March 17.01-02p3), and An Carraig Obs. (March 17.94p5)
K12D00O 2012 DO (arc=30 days, H=20.2 ~309m) from Los Molinos Obs. (March 17.22-23p5)
K12C29D 2012 CD29 (q=0.360 AU, arc=31 days, H=19.9 ~355m) from Schiaparelli Obs. (March 9.96-98p3) and New Millennium Obs. (March 14.78-83p3, 15.84p1 & 15.95p1)
K12C17C 2012 CC17 (arc=2 opp, H=20.5 ~269m) from ARO Westfield (March 17.05-06p3)
K12BD4J 2012 BJ134 (q=0.374 AU, Q=4.137 AU, arc=58 days, H=18.3 ~741m) from Schiaparelli Obs. (March 9.99p5), New Millennium Obs. (March 15.95p3), Castelmartini Obs. (March 16.83p3), ARO Westfield (March 17.03-04p8), Nonndorf Obs. (March 17.80p3), and An Carraig Obs. (March 17.89-91p3)
K12B23T 2012 BT23 (arc=57 days, H=19.0 ~537m) from Castelmartini Obs. (March 16.78p3) and ARO Westfield (March 17.03-04p4)
K12B20C 2012 BC20 (arc=56 days, H=18.6 ~645m) from Schiaparelli Obs. (March 10.08-09p3) and Castelmartini Obs. (March 17.06p3)
K12A11A 2012 AA11 (arc=64 days, H=20.0 ~339m) from New Millennium Obs. (March 15.92p4), Castelmartini Obs. (March 16.82-83p3), ARO Westfield (March 17.09-10p5), Nonndorf Obs. (March 17.82p3), and An Carraig Obs. (March 17.86-88p3)
K11Y15V 2011 YV15 (Q=4.394 AU, arc=3 opp, H=17.2 ~1.23 km) from Castelmartini Obs. (March 17.00-01p3) and LINEAR (March 17.33-37p5)
K11X03O 2011 XO3 (Q=5.385 AU, arc=108 days, H=16.6 ~1.62 km) from New Millennium Obs. (March 14.79-84p3 & 15.84-85p4), Castelmartini Obs. (March 16.81-82p3), LINEAR (March 17.11-15p5), and Galati Obs. (March 17.77-78p6)
K11WD4V 2011 WV134 (Q=4.676 AU, arc=2 opp, H=17.1 ~1.29 km) from Schiaparelli Obs. (March 9.82-83p2), Castelmartini Obs. (March 16.80-81p3), LINEAR (March 17.10-15p5), and Galati Obs. (March 17.75-76p14)
K11V05W 2011 VW5 (arc=135 days, H=18.7 ~616m) from ARO Westfield (March 17.07-10p3 at V=22.4-23.1)
K11SA2L 2011 SL102 (arc=3 opp, H=18.2 ~776m) from Schiaparelli Obs. (March 10.03-04p3)
K11Q48D 2011 QD48 (arc=2 opp, H=18.1 ~812m) from Schiaparelli Obs. (March 9.79-81p2), ARO Westfield (March 17.10-12p4), and Galati Obs. (March 17.73-75p6)
K11E12B 2011 EB12 (arc=2 opp, H=21.3 ~186m) from Schiaparelli Obs. (March 13.94-95p2)
K08J30Z 2008 JZ30 (arc=2 opp, H=18.5 ~676m) from Schiaparelli Obs. (March 14.17-18p3)
K08CB9C 2008 CC119 (arc=2 opp, H=18.6 ~645m) from Schiaparelli Obs. (March 13.91-92p2)
K06V13Y 2006 VY13 (Q=4.718 AU, arc=2 opp, H=17.3 ~1.17 km) from Galati Obs. (March 18.07-08p12)
K05F00D 2005 FD (arc=4 opp, H=19.6 ~407m) from Desert Moon Obs. (March 17.24p1, 17.29p1 & 17.34p1)
K04Q07J 2004 QJ7 (arc=3 opp, H=18.5 ~676m) from Schiaparelli Obs. (March 10.05-06p3) and Montevenere Obs. (March 16.95-97p4)
K02R27D 2002 RD27 (Q=4.117 AU, arc=2 opp, H=18.1 ~812m) from Schiaparelli Obs. (March 15.05-07p2)
K02E06M 2002 EM6 (arc=3 opp, H=20.1 ~323m) from Schiaparelli Obs. (March 9.94p2) and Galati Obs. (March 17.81-82p6)
K00CA1P 2000 CP101 (arc=3 opp, H=19.9 ~355m) from ARO Westfield (March 17.29-33p3 at V=22.0-22.4)
J98K03N 1998 KN3 (q=0.195 AU, arc=3 opp, H=18.4 ~708m) from Schiaparelli Obs. (March 13.98-99p3) and CSS (March 17.29-32p4)
V7643 317643 2003 FH1 from Galati Obs. (March 18.09-10p18)
V2942 312942 1995 EK1 from LINEAR (March 17.28-32p5)
R5558 275558 1999 RH33 from LINEAR (March 17.28-31p4)
Q3976 263976 2009 KD5 from An Carraig Obs. (March 17.97-99p3)
N8063 238063 2003 EG from CSS (March 17.29-31p4)
K8565 208565 2002 CT11 from Galati Obs. (March 18.06-07p6)
I9008 189008 1996 FR3 from LINEAR (March 17.39-43p5)
G3000 163000 2001 SW169 from LINEAR (March 17.22-26p4)
G2186 162186 1999 OP3 from New Millennium Obs. (March 14.81p2, 14.85-86p2 & 15.93p2)
F5336 155336 2006 GA1 from New Millennium Obs. (March 14.79-84p4 & 15.85p3) and Galati Obs. (March 17.78-79p6)
F4144 154144 2002 FA5 from ISON-NM Obs. (March 17.31-35p4)
E3651 143651 2003 QO104 from New Millennium Obs. (March 15.94-95p2)
D8524 138524 2000 OJ8 from Desert Moon Obs. (March 17.18-21p3)
D8359 138359 2000 GX127 from New Millennium Obs. (March 15.93p4)
D8205 138205 2000 EZ148 from LINEAR (March 17.29-32p3)
D7925 137925 2000 BJ19 from Galati Obs. (March 17.80-81p18)
89959 89959 2002 NT7 from New Millennium Obs. (March 14.79p2, 14.83p2, 15.84-88p3 & 15.96p2)
85839 85839 1998 YO4 from New Millennium Obs. (March 15.93p2)
32906 32906 1994 RH from New Millennium Obs. (March 15.95p2) and LINEAR (March 17.21-26p5)
24475 24475 2000 VN2 from New Millennium Obs. (March 15.96p2)
21277 21277 1996 TO5 from LINEAR (March 17.28-32p5)
21088 21088 1992 BL2 from New Millennium Obs. (March 14.80p2 & 14.85p2)
09400 9400 1994 TW1 from Crni Vrh Obs. (March 17.08-12p4)
07341 7341 1991 VK from Los Molinos Obs. (March 17.26-29p5)
03102 3102 Krok (1981 QA) from CSS (March 17.29-31p4) and MLS (March 17.30-32p4)
02059 2059 Baboquivari (1963 UA) from Pan-STARRS 1 (PS1) (March 16.32-36p3)
01917 1917 Cuyo (1968 AA) from New Millennium Obs. (March 14.79p2 & 14.84p2)
01862 1862 Apollo (1932 HA) from New Millennium Obs. (March 15.97p2)
01627 1627 Ivar (1929 SH) from New Millennium Obs. (March 14.85p2 & 15.92p2)
01620 1620 Geographos (1951 RA) from New Millennium Obs. (March 14.84p2 & 15.85p2) and Bigmuskie Obs. (March 17.79-80p3)
01036 1036 Ganymed (1924 TD) from CSS (March 17.13-16p4)

MPEC 2012-F32 - "04:44 UT" - Comet C/2012 F3 (Panstarrs)

CK12F030 C/2012 F3 (Panstarrs) (i=11.3°, q=3.475 AU, TP=2015 Apr. 4.72233 TT) from PS1 (Jan. 19.48-52p3 & March 16.32-37p4) and Marco Micheli on Mauna Kea (March 17.49p3)

MPEC 2012-F31 - "04:30 UT" - Comet C/2012 F2 (Panstarrs)

CK12F020 C/2012 F2 (Panstarrs) (i=10.5°, q=2.417 AU, TP=2011 July 27.50964 TT) from PS1 (March 16.49-53p4), the Spacewatch 1.8m telescope (March 17.22-24p3), and Micheli/Mauna Kea (March 17.49-50p3)

MPEC 2012-F30 - "04:18 UT" - Comet C/2012 F1 (Gibbs)

CK12F010 C/2012 F1 (Gibbs) (i=159.4°, q=2.559 AU, TP=2012 Feb. 21.18219 TT) from CSS (March 16.28-33p8), Holmes/CTIO (March 16.36-37p3, 17.28-29p3 & 17.99-01p3), Kevin Hills via RAS Obs. Moorook (March 16.49-50p3), KLENOT (March 16.95p5), Spacewatch 1.8m (March 17.21p3), MRO (March 17.21-24p4), Hidetaka Sato via RAS Obs. Mayhill (March 17.22-23p3), Grasslands Obs. (March 17.24p3), Kline Obs. (March 17.26-28p3), and MLS (March 17.26p4)

Observers on 18 March '12

A total of 29 observers appear in today's MPECs.

Code	Observer / observatory
`J16`	An Carraig Obs. in Northern Ireland, 5 in MPEC 2012-F33 -- 2012 DX75, 2012 DH4, 2012 BJ134, 2012 AA11, 263976
`H21`	Astronomical Research Obs. Westfield in Illinois, 17 in MPECs 2012-F33 & 2012-F35 -- 2012 FC1, 2012 EY11, 2012 EJ5, 2012 EF5, 2012 EA2, 2012 DM4, 2012 DG31, 2012 DE31, 2012 CC17, 2012 BT23, 2012 BJ134, 2012 AX, 2012 AA11, 2011 VW5, 2011 UP91, 2011 QD48, 2000 CP101
`A74`	Bergen-Enkheim Obs. in Germany, 1 in MPEC 2012-F33 -- 2012 EL5
`B88`	Bigmuskie Obs. in Italy, 1 in MPEC 2012-F33 -- 1620
`160`	Castelmartini Obs. in Italy, 9 in MPEC 2012-F33 -- 2012 DX75, 2012 DH4, 2012 BT23, 2012 BJ134, 2012 BC20, 2012 AA11, 2011 YV15, 2011 XO3, 2011 WV134
`703`	Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2012-F30 & 2012-F33 -- C/2012 F1, 1998 KN3, 238063, 136618, 3102, 1036
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2012-F30 & 2012-F36 -- 2012 FD1, C/2012 F1
`106`	Crni Vrh Obs. in Slovenia, 1 in MPEC 2012-F33 -- 9400
`448`	Desert Moon Obs. in New Mexico, 3 in MPEC 2012-F33 -- 2012 DZ32, 2005 FD, 138524
`C73`	Galati Obs. in Romania, 10 in MPEC 2012-F33 -- 2012 EK8, 2011 XO3, 2011 WV134, 2011 QD48, 2006 VY13, 2002 EM6, 317643, 208565, 155336, 137925
`651`	Grasslands Obs. in Arizona, 1 in MPEC 2012-F30 -- C/2012 F1
`J95`	Great Shefford Obs. in England, 3 in MPECs 2012-F34, 2012-F35 & 2012-F36 -- 2012 FD1, 2012 FC1, 2012 FB1
`H15`	ISON-NM Obs. in New Mexico, 1 in MPEC 2012-F33 -- 154144
`246`	KLENOT in the Czech Republic, 2 in MPECs 2012-F30 & 2012-F33 -- C/2012 F1, 2012 EO8
`046`	Klet Obs. in the Czech Republic, 2 in MPEC 2012-F33 -- 2012 DX75, 2012 DH4
`H05`	Kline Obs. in Colorado, 1 in MPEC 2012-F30 -- C/2012 F1
`704`	LINEAR in New Mexico, 12 in MPEC 2012-F33 -- 2012 FJ, 2012 FG, 2011 YV15, 2011 XO3, 2011 WV134, 32906, 312942, 275558, 21277, 189008, 163000, 138205
`844`	Los Molinos Obs. in Uruguay, 2 in MPEC 2012-F33 -- 2012 DO, 7341
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2012-F30 & 2012-F35 -- 2012 FC1, C/2012 F1
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-F33 -- 2008 CE119
`568_`	Marco Micheli on Mauna Kea in Hawaii, 2 in MPECs 2012-F31 & 2012-F32 -- C/2012 F3, C/2012 F2
`C91`	Montevenere Obs., 1 in MPEC 2012-F33 -- 2004 QJ7
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2012-F30, 2012-F33, 2012-F34, 2012-F35 & 2012-F36 -- 2012 FD1, 2012 FC1, 2012 FB1, C/2012 F1, 173664, 3102
`A24`	New Millennium Obs. in Italy, 18 in MPEC 2012-F33 -- 2012 CD29, 2012 BJ134, 2012 AA11, 2011 XO3, 89959, 85839, 32906, 29075, 24475, 21088, 162186, 155336, 143651, 138359, 1917, 1862, 1627, 1620
`C47`	Nonndorf Obs. in Austria, 2 in MPEC 2012-F33 -- 2012 BJ134, 2012 AA11
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 3 in MPECs 2012-F31, 2012-F32 & 2012-F33 -- C/2012 F3, C/2012 F2, 2059
`H06\|`	Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-F30 -- C/2012 F1
D90`	Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2012-F30 -- C/2012 F1
`204`	Schiaparelli Obs. in Italy, 18 in MPEC 2012-F33 -- 2012 EN3, 2012 EL8, 2012 EB2, 2012 EA2, 2012 DF61, 2012 CD29, 2012 BJ134, 2012 BC20, 2011 WV134, 2011 SL102, 2011 QD48, 2011 EB12, 2008 JZ30, 2008 CC119, 2004 QJ7, 2002 RD27, 2002 EM6, 1998 KN3
`291`	Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2012-F30 & 2012-F31 -- C/2012 F2, C/2012 F1

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

Impact Risk Monitoring on 18 March '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 ET14	NEODyS	1502	2021-2088	5	7.22e-09	-3.18	-3.54	0	NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2012-03-15.211 to 2012-03-17.267."

2012 ER14	NEODyS	1502	2022-2064	4	1.8e-09	-6.04	-6.14	0	NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2012-03-14.234 to 2012-03-17.159."

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 18 March '12

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

2053	Grabbed MPEC 2012-F36 - 2012 FD1 - see above
2024	Grabbed MPEC 2012-F34 - 2012 FB1 - see above Grabbed MPEC 2012-F35 - 2012 FC1 - see above
1503	Updated Traffic Report
1502	Noted that NEODyS has posted 2012 ER14 as an impact risk - see above Noted that NEODyS has posted 2012 ET14 as an impact risk - see above Grabbed MPEC 2012-F33 - Daily Orbit Update - see above
0457	Grabbed MPEC 2012-F31 - Comet C/2012 F2 (Panstarrs) - see above Grabbed MPEC 2012-F32 - Comet C/2012 F3 (Panstarrs) - see above
0428	Grabbed MPEC 2012-F30 - Comet C/2012 F1 (Gibbs) - see above

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