Contents  on 6 January '13

Asteroid/Comet Connection (A/CC) 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 6 January '13

Two objects reported inside ten LD

Two asteroids are reported to be within ten lunar distances (LD) of Earth today. 2013 AD4 is outbound from 7.62 to 8.47 LD and radar target 2012 XM55 from 8.85 to 9.45 LD.

Approaching our neighborhood next, 2013 AB4 arrives inside ten LD on January 8th and intruder 2012 DA14 (risk-listed radar target) arrives on February 8th.

This report was updated at 1804 UTC with today's DOU MPEC carrying the recovery of, and first follow-up for, departed risk-listed 2012 YR1, adding 15 days to a one-day discovery arc, plus additional 2013 AD4 confirmation, follow-up for departed 2012 XB133, and observation of 2012 XO134 and 2012 XJ134 from mid-December. Today's first traffic report was generated at 0604 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. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 6 January '13

The MPC's NEO Confirmation Page has 28 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 28 objects listed. Of these, sixteen were "one nighters." So far The Tracking News has counted a total of 33 listings on the NEOCP today.

New MPECs  on 6 January '13

Minor Planet Electronic Circulars

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


<< OOC on 6 Jan. '13 >> MPEC 2013-A29 - "21:45 UT" - Observations and Orbits of Comets


MPEC 2013-A28 - "19:23 UT" - 2013 AF4


<< DOU on 6 Jan. '13 >>  MPEC 2013-A27 - "06:03 UT" - Daily Orbit Update


MPEC 2013-A26 - "03:05 UT" - 2013 AL11


MPEC 2013-A25 - "02:45 UT" - 2013 AL11


MPEC 2013-A24 - "02:42 UT" - 2013 AK11


MPEC 2013-A23 - "02:39 UT" - 2013 AJ11


MPEC 2013-A22 - "02:36 UT" - 2013 AH11

Observers  on 6 January '13

A total of 104 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 20 in MPEC 2013-A29 -- C/2012 Y1, C/2012 V2, P/2012 US27, P/2012 T7, C/2012 T5, P/2012 T1, C/2012 L2, C/2012 L1, C/2012 K5, C/2012 J1, C/2012 F6, C/2012 A2, C/2011 UF305, C/2009 P1, 273P, 262P, 168P, 117P, 78P, 37P
J24Altamira Obs. in the Canary Islands, 21 in MPEC 2013-A29 -- C/2013 A1, C/2012 X1, C/2012 V2, C/2012 T5, C/2012 S1, C/2012 L2, C/2012 L1, C/2012 K5, C/2012 K1, C/2012 J1, C/2012 F6, C/2012 A2, C/2011 UF305, C/2011 J2, C/2009 P1, 274P, 272P, 262P, 260P, 242P, 117P
Z74Amanecer de Arrakis Obs., 3 in MPEC 2013-A29 -- C/2012 S1, C/2012 L2, C/2012 K5
7057Krisztian Sarneczky via Apache Point Obs. in New Mexico, 22 in MPEC 2013-A29 -- P/2004 VR8, P/2004 V1, P/2004 A1, P/2003 S1, C/2002 V2, P/2002 T5, P/2001 R6, 268P, 266P, 246P, 243P, 234P, 183P, 178P, 176P, 56P, 50P, 48P, 47P, 46P, 30P, 7P
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-A22 -- 2013 AH11
H21Astronomical Research Obs. Westfield in Illinois, 24 in MPECs 2013-A22, 2013-A23, 2013-A24, 2013-A27 & 2013-A28 -- 2013 AK11, 2013 AJ11, 2013 AH11, 2013 AF4, 2012 YY6, 2012 YQ3, 2012 YO1, 2012 YL7, 2012 YK7, 2012 XS111, 2012 XR134, 2012 XQ111, 2012 XP111, 2012 XF55, 2012 XE17, 2012 XE112, 2012 WK4, 2012 WB25, 2012 VJ82, 2012 UB34, 2012 PP28, 2009 XF2, 2007 LR32, 2002 PO75
J51Atlante Obs. in the Canary Islands, 3 in MPECs 2013-A27 & 2013-A29 -- C/2012 L1, C/2012 K5, 4179
I47Auger Obs. in Argentina, 7 in MPEC 2013-A29 -- C/2013 A1, C/2012 T5, C/2012 S1, C/2012 J1, C/2011 O1, C/2011 L4, C/2009 F4
C77Bernezzo Obs. in Italy, 2 in MPECs 2013-A22 & 2013-A29 -- 2013 AH11, C/2012 S1
I32Beta Orionis Obs. in Argentina, 2 in MPEC 2013-A29 -- C/2012 K5, C/2012 F6
B88Bigmuskie Obs. in Italy, 1 in MPEC 2013-A27 -- 2012 YO1
300Bisei Spaceguard Center in Japan, 1 in MPEC 2013-A22 -- 2013 AH11
C86Blanes Obs. in Spain, 4 in MPEC 2013-A29 -- C/2012 L1, C/2012 K5, C/2012 J1, C/2011 UF305
I99Blanquita Obs. in Spain, 6 in MPEC 2013-A29 -- C/2012 S1, C/2012 L2, C/2012 K5, C/2012 J1, C/2012 A2, C/2011 UF305
B59Borken Obs. in Germany, 1 in MPEC 2013-A29 -- C/2012 K5
726Brainerd Obs. in Minnesota, 9 in MPECs 2013-A27 & 2013-A29 -- C/2012 L1, C/2012 K5, C/2011 UF305, 2002 AY1, 262623, 203471, 138937, 5646, 4179
215Buchloe Obs. in Germany, 8 in MPEC 2013-A29 -- C/2012 X2, C/2012 X1, C/2012 K5, P/2011 N1, 274P, 215P, 121P, 63P
235CAST Obs. in Italy, 8 in MPEC 2013-A29 -- C/2012 T5, C/2012 S1, C/2012 L2, C/2012 L1, C/2012 K5, C/2012 J1, C/2010 S1, 262P
I72Carpe-Noctem Obs., 11 in MPEC 2013-A29 -- C/2012 V2, C/2012 S1, C/2012 L2, C/2012 L1, C/2012 K5, C/2012 J1, C/2012 A2, C/2011 UF305, C/2011 J2, C/2010 S1, 262P
160Castelmartini Obs. in Italy, 25 in MPECs 2013-A27 & 2013-A29 -- 2012 YO1, 2012 XE112, 2012 XD112, 2012 XC112, C/2012 S1, C/2012 K5, C/2012 J1, C/2011 UF305, C/2011 J2, C/2009 P1, 349068, 345722, 331509, 330825, 277127, 276397, 262623, 230111, 229672, 203471, 137805, 4179, 262P, 260P, 63P
703Catalina Sky Survey (CSS) in Arizona, 16 in MPECs 2013-A25, 2013-A27 & 2013-A29 -- 2013 AL11, 2012 VJ82, C/2011 J2, 2009 XF2, 348776, 277127, 249886, 185853, 153243, 10115, 1866, 1864, 1620, 261P, 129P, 114P
470Ceccano Obs. in Italy, 1 in MPEC 2013-A27 -- 99942
924Cegep de Trois-Rivieres Obs. in Quebec, 1 in MPEC 2013-A29 -- C/2012 S1
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 5 in MPECs 2013-A23, 2013-A25 & 2013-A27 -- 2013 AL11, 2013 AJ11, 2012 XQ55, 2012 XM145, 2009 AV
A77Chante-Perdrix Obs. in France, 3 in MPEC 2013-A29 -- C/2012 K5, C/2011 UF305, 29P
J01Cielo Profundo Obs. in Spain, 14 in MPEC 2013-A29 -- C/2012 S1, C/2012 L1, C/2012 K5, P/2012 B1, C/2011 UF305, C/2011 J2, C/2009 P1, 274P, 260P, 242P, 117P, 78P, 63P, 29P
C13Como Obs. in Italy, 2 in MPEC 2013-A29 -- C/2009 P1, 168P
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2013-A22 -- 2013 AH11
I17Cupillari Obs. in Pennsylvania, 1 in MPEC 2013-A29 -- C/2012 K5
958Dax Obs. in France, 31 in MPEC 2013-A29 -- C/2012 V2, C/2012 T5, P/2012 SB6, C/2012 S4, P/2012 S2, C/2012 S1, P/2012 NJ, C/2012 L2, C/2012 L1, C/2012 K5, C/2012 J1, C/2012 F6, P/2012 B1, C/2012 A2, C/2011 UF305, C/2011 J2, C/2010 S1, C/2010 R1, C/2009 P1, C/2008 S3, C/2008 FK75, 274P, 262P, 260P, 244P, 242P, 185P, 175P, 168P, 78P, 63P
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2013-A29 -- C/2012 K5
I19El Gato Gris Obs. in Argentina, 2 in MPECs 2013-A22 & 2013-A25 -- 2013 AL11, 2013 AH11
J19El Maestrat Obs. in Spain, 1 in MPEC 2013-A29 -- C/2011 J2
I57Elche Obs., 21 in MPECs 2013-A27 & 2013-A29 -- C/2012 V2, P/2012 US27, C/2012 S1, C/2012 L2, C/2012 K5, C/2012 J1, C/2012 A2, C/2011 UF305, C/2011 J2, 2002 AY1, 343098, 203471, 138937, 4179, 2062, 274P, 270P, 262P, 260P, 242P, 63P
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2013-A22 -- 2013 AH11
I59Fuente de los Matos Obs., 1 in MPEC 2013-A29 -- C/2012 S1
G26Fushan Obs., 1 in MPEC 2013-A29 -- C/2012 K5
372Geisei Obs. in Japan, 1 in MPEC 2013-A29 -- C/2012 K5
B83Gieres Obs. in France, 1 in MPEC 2013-A29 -- C/2012 L2
238Grorudalen Obs., 4 in MPEC 2013-A29 -- C/2012 S1, C/2012 A2, C/2010 S1, 168P
511Haute Provence Obs. in Germany, 1 in MPEC 2013-A29 -- 36P
C43Hoyerswerda Obs. in Germany, 4 in MPEC 2013-A29 -- C/2012 L1, C/2012 J1, C/2012 A2, 260P
D00ISON-Kislovodsk Obs., 1 in MPEC 2013-A29 -- C/2012 S1
H15ISON-NM Obs. in New Mexico, 2 in MPEC 2013-A29 -- C/2012 A1, 274P
585Kiev Comet Station in the Ukraine, 4 in MPEC 2013-A29 -- C/2012 S1, C/2011 UF305, 260P, 168P
C40Kuban State Univ. Obs. in Russia, 12 in MPEC 2013-A29 -- C/2012 S1, P/2012 NJ, C/2012 L1, C/2012 K5, C/2012 J1, C/2011 UF305, C/2011 J2, C/2011 F1, C/2010 S1, 260P, 168P, 29P
D95Kurihara Obs. in Japan, 13 in MPEC 2013-A29 -- C/2012 X2, C/2012 X1, P/2012 US27, C/2012 T5, C/2012 S3, C/2012 S1, C/2012 L1, C/2012 K5, C/2012 A1, C/2011 UF305, C/2010 S1, 274P, 262P
704LINEAR in New Mexico, 5 in MPECs 2013-A22 & 2013-A29 -- 2013 AH11, C/2011 L4, C/2006 S3, 260P, 246P
J31La Axarquia Obs. in Spain, 2 in MPEC 2013-A29 -- C/2012 K5, 63P
J87La Canada Obs. in Spain, 4 in MPECs 2013-A25 & 2013-A29 -- 2013 AL11, C/2010 U3, 270P, 65P
G38La Senda Obs., 1 in MPEC 2013-A22 -- 2013 AH11
J38La Vara Obs. in Spain, 18 in MPEC 2013-A29 -- C/2013 A1, C/2012 V2, C/2012 V1, C/2012 T5, C/2012 S1, C/2012 L2, C/2012 L1, C/2012 K5, C/2012 J1, C/2012 A2, C/2011 UF305, C/2011 J2, C/2010 S1, 262P, 260P, 168P, 78P, 63P
J134program code 4 via the Liverpool Telescope in the Canary Islands, 1 in MPEC 2013-A29 -- C/2012 S1
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2013-A22, 2013-A23, 2013-A24, 2013-A25 & 2013-A27 -- 2013 AL11, 2013 AK11, 2013 AJ11, 2013 AH11, 2012 YQ1
C10Maisoncelles Obs. in France, 1 in MPEC 2013-A29 -- C/2012 K5
232Masquefa Obs. in Spain, 3 in MPEC 2013-A29 -- C/2012 S1, C/2012 K5, C/2011 UF305
118Modra Obs. in Slovakia, 2 in MPEC 2013-A29 -- C/2012 X1, C/2011 J2
213Montcabre Obs. in Spain, 7 in MPEC 2013-A29 -- C/2012 X1, C/2012 V2, C/2012 S1, C/2012 L2, C/2012 K5, C/2012 F6, C/2012 A2
945Monte Deva Obs. in Spain, 7 in MPEC 2013-A29 -- C/2012 S1, C/2012 L2, C/2012 K5, C/2012 J1, C/2011 UF305, C/2011 J2, C/2010 S1
C91Montevenere Obs., 3 in MPEC 2013-A29 -- C/2012 S1, C/2012 K5, C/2011 UF305
900Moriyama Obs. in Japan, 28 in MPECs 2013-A22 & 2013-A29 -- 2013 AH11, C/2012 X2, C/2012 X1, P/2012 US27, C/2012 T5, C/2012 S1, C/2012 L2, C/2012 L1, C/2012 K5, C/2012 J1, C/2012 F6, P/2012 B1, C/2012 A2, C/2011 UF305, C/2011 J2, C/2010 U3, C/2009 P1, 270P, 262P, 260P, 242P, 185P, 168P, 97P, 78P, 65P, 63P, 29P
G96Mt. Lemmon Survey (MLS) in Arizona, 14 in MPECs 2013-A23, 2013-A24, 2013-A27, 2013-A28 & 2013-A29 -- 2013 AK11, 2013 AJ11, 2013 AF4, 2012 XP111, 2012 XF17, P/2011 U2, 2008 AM33, 2001 YM2, 1994 XD, 39572, 159923, 10860, 274P, 175P
J93Mt. Tuffley Obs. in England, 1 in MPEC 2013-A29 -- C/2011 UF305
E07Murrumbateman Obs. in New South Wales, 6 in MPEC 2013-A29 -- C/2012 Y3, C/2012 Y1, C/2012 C1, C/2009 F4, 242P, 26P
A13Naef Obs. in Switzerland, 2 in MPEC 2013-A29 -- C/2012 S1, 274P
D81Nagano Obs. in Japan, 3 in MPEC 2013-A29 -- C/2012 K5, C/2012 J1, C/2012 F6
J47Nazaret Obs. in Spain, 5 in MPEC 2013-A29 -- C/2013 A1, C/2012 T5, C/2012 S1, C/2012 K5, 260P
A24New Millennium Obs. in Italy, 23 in MPECs 2013-A22 & 2013-A29 -- 2013 AH11, C/2012 V2, P/2012 SB6, C/2012 S4, C/2012 S1, C/2012 L2, C/2012 L1, C/2012 J1, C/2012 A2, C/2012 A1, C/2011 UF305, P/2011 N1, C/2011 J2, C/2010 S1, C/2009 S3, C/2008 FK75, 261P, 260P, 244P, 168P, 65P, 63P, 36P
C47Nonndorf Obs. in Austria, 10 in MPEC 2013-A29 -- C/2012 L2, C/2012 L1, C/2012 K5, C/2012 J1, C/2012 A2, C/2011 UF305, C/2011 J2, C/2010 S1, 262P, 260P
423North Ryde Obs. in New South Wales, 1 in MPEC 2013-A29 -- C/2012 Y3
411Oizumi Obs. in Japan, 1 in MPEC 2013-A29 -- C/2012 S1
C23Olmen Obs. in Belgium, 13 in MPEC 2013-A29 -- C/2012 V2, C/2012 S4, C/2012 S3, C/2012 S1, C/2012 L2, C/2012 L1, C/2012 K5, C/2012 J1, C/2012 A2, C/2010 S1, 274P, 262P, 168P
F51Pan-STARRS 1 (PS1) in Hawaii, 38 in MPEC 2013-A29 -- C/2012 L1, C/2012 K5, C/2012 A2, C/2011 O1, P/2011 JB15, C/2011 F1, P/2011 A2, C/2010 S1, C/2010 L3, P/2010 JC81, P/2010 J3, C/2010 FB87, C/2010 F3, C/2009 Y1, 254P, 253P, 246P, 244P, 242P, 228P, 223P, 215P, 172P, 164P, 162P, 160P, 152P, 117P, 115P, 105P, 94P, 81P, 74P, 49P, 29P, 10P, 9P, 2P
A32Panker Obs. in Germany, 13 in MPEC 2013-A29 -- C/2012 V2, C/2012 T5, C/2012 S4, C/2012 L2, C/2012 A2, C/2010 S1, C/2008 FK75, 270P, 266P, 262P, 261P, 168P, 119P
941Pla D'Arguines Obs. in Spain, 2 in MPEC 2013-A29 -- C/2012 A1, 274P
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 21 in MPECs 2013-A22, 2013-A27 & 2013-A29 -- 2013 AH11, 2013 AD4, C/2012 Y1, C/2012 X2, C/2012 X1, P/2012 US27, C/2012 T5, C/2012 S1, C/2012 F6, C/2012 C1, P/2012 B1, C/2011 R1, C/2011 O1, C/2011 J2, C/2009 P1, C/2009 F4, 275P, 185P, 175P, 65P, 29P
939Rodeno Obs. in Spain, 7 in MPEC 2013-A29 -- C/2012 S1, C/2012 L2, C/2012 K5, C/2012 A2, C/2011 UF305, C/2010 S1, 262P
C09Rouet Obs. in France, 3 in MPEC 2013-A29 -- C/2012 K5, C/2011 UF305, 260P
461SZTE Asteroid Program in Hungary, 8 in MPECs 2013-A22, 2013-A27 & 2013-A29 -- 2013 AH11, 2012 XY6, C/2012 U1, C/2012 L2, C/2012 J1, C/2012 A2, 2000 YO29, 25916
104San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2013-A23, 2013-A24 & 2013-A25 -- 2013 AL11, 2013 AK11, 2013 AJ11
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-A22 -- 2013 AH11
B70Sant Celoni Obs. in Spain, 2 in MPEC 2013-A29 -- C/2012 K5, C/2011 UF305
B56Sant Pere Obs. in Spain, 1 in MPEC 2013-A29 -- C/2012 K5
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2013-A29 -- C/2012 S1
204Schiaparelli Obs. in Italy, 22 in MPECs 2013-A23, 2013-A25 & 2013-A27 -- 2013 AL11, 2013 AJ11, 2012 XT134, 2012 XR111, 2012 XP111, 2012 XO134, 2012 XJ134, 2012 XH55, 2012 XE133, 2012 XD17, 2012 XD112, 2012 XB133, 2012 VL6, 2012 VJ6, 2008 WJ60, 2005 VE7, 2004 XN14, 2004 XL29, 2004 XH29, 2004 SB20, 1998 XX2, 99942
D93Sendai Obs. in Japan, 5 in MPEC 2013-A29 -- C/2012 S1, C/2012 L1, C/2012 F6, C/2011 UF305, C/2009 P1
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2013-A22 & 2013-A29 -- 2013 AH11, C/2012 Y3
691Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2013-A27 & 2013-A29 -- 2001 YM2, 229007, 22753, 144332, 272P, 10P
291Spacewatch 1.8m telescope in Arizona, 28 in MPECs 2013-A27 & 2013-A28 -- 2013 AF4, 2013 AC, 2012 YR1, 2012 YQ1, 2012 YN1, 2012 YK7, 2012 YJ7, 2012 YH7, 2012 YD7, 2012 XS93, 2012 XS134, 2012 XS111, 2012 XD17, 2012 XD112, 2012 XB133, 2012 WG32, 2012 VZ25, 2012 VO7, 2012 VN82, 2012 VN7, 2012 VF82, 2012 VA5, 2012 UA34, 2011 SD173, 2011 HL7, 2010 UT7, 2010 RQ30, 2006 UD17
K21St. Saturnin les Avignon Obs., 1 in MPEC 2013-A29 -- 260P
C36Starry Wanderer Obs. in Belarus, 1 in MPEC 2013-A29 -- C/2012 S1
A71Stixendorf Obs. in Austria, 7 in MPEC 2013-A29 -- P/2012 US27, C/2012 T5, C/2012 L1, C/2012 K5, C/2012 F6, C/2006 S3, 262P
I81Tarbatness Obs. in Scotland, 10 in MPEC 2013-A29 -- C/2012 S1, C/2012 L2, C/2012 L1, C/2012 J1, C/2012 A2, C/2011 UF305, C/2011 J2, 274P, 260P, 168P
926Tenagra II Obs. in Arizona, 1 in MPEC 2013-A27 -- 265661
C35Terrassa Obs., 1 in MPEC 2013-A29 -- C/2012 S1
I76Tesla Obs. in Spain, 1 in MPEC 2013-A27 -- 2012 XF112
C92Valdicerro Obs. in Italy, 1 in MPEC 2013-A22 -- 2013 AH11
B51Vallauris Obs. in France, 4 in MPEC 2013-A29 -- C/2012 S1, C/2012 L2, C/2012 L1, C/2012 K5
H47Vicksburg Obs. in Mississippi, 3 in MPEC 2013-A29 -- C/2012 J1, 262P, 260P
718Wiggins Obs. in Utah, 2 in MPECs 2013-A22 & 2013-A27 -- 2013 AH11, 2012 XF112
J08Zonalunar Obs. in Spain, 2 in MPEC 2013-A29 -- C/2012 V2, C/2012 K5
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 12 in MPEC 2013-A29 -- C/2012 U1, P/2012 T7, C/2012 T6, P/2012 T2, C/2009 P1, 271P, 266P, 261P, 185P, 121P, 117P, 63P
I89iTelescope Obs. Nerpio in Spain, 2 in MPEC 2013-A29 -- C/2012 S1, C/2012 K5
Q620program code 0 via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-A29 -- C/2012 F6
Q621program code 1 via iTelescope Obs. Siding Spring in New South Wales, 5 in MPEC 2013-A29 -- C/2012 Y1, C/2012 C1, C/2011 O1, C/2009 F4, 76P
Q622program code 2 via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2013-A22 & 2013-A29 -- 2013 AH11, C/2012 T5
Q624program code 4 via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-A29 -- C/2012 F6
Q625program code 5 via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-A22 -- 2013 AH11
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 January '13

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 YR1JPL Sentry16212035-210573.6e-05-5.41-5.640JPL: "Analysis based on 14 observations spanning 16.067 days (2012-Dec-20.20945 to 2013-Jan-05.27642)." Diameter approximately 0.017 km. from mean, weighted H=26.5.
2012 YQ1JPL Sentry1621210611.7e-08-6.10-6.100JPL: "Analysis based on 63 observations spanning 17.283 days (2012-Dec-19.23613 to 2013-Jan-05.51888)." Diameter approximately 0.220 km. from mean, weighted H=21.0.
2012 XE133JPL Sentry16212083-211353.0e-08-7.00-7.390JPL: "Analysis based on 96 observations spanning 23.689 days (2012-Dec-12.43361 to 2013-Jan-05.12216)." Diameter approximately 0.071 km. from mean, weighted H=23.4.

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 6 January '13

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

2205Grabbed MPEC 2013-A28 - 2013 AF4 - see above
Grabbed MPEC 2013-A29 - Observations and Orbits of Comets - see above
1804Updated Traffic Report
1621Noted that JPL Sentry has updated its 2012 XE133 risk assessment - see above
Noted that JPL Sentry has updated its 2012 YQ1 risk assessment - see above
Noted that JPL Sentry has updated its 2012 YR1 risk assessment - see above
Grabbed MPEC 2013-A27 - Daily Orbit Update - see above
0319Grabbed MPEC 2013-A26 - 2013 AL11 - see above
0250Grabbed MPEC 2013-A22 - 2013 AH11 - see above
Grabbed MPEC 2013-A23 - 2013 AJ11 - see above
Grabbed MPEC 2013-A24 - 2013 AK11 - see above
Grabbed MPEC 2013-A25 - 2013 AL11 - see above