Contents  on 25 March '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 25 March '13

Six objects reported inside ten LD

There are six objects reported to be inside ten lunar distances (LD) of our planet today. 2013 FG is outbound from 4.02 to 5.12 LD and 2013 ES11 from 8.05 to 9.72 LD. Newly announced risk-listed 2013 FU13 is also heading out, moving from about 7.2 to 8.5 LD* after passing the Earth at a distance preliminarily calculated to be 1.8 LD on March 19th. And three objects arrive inside ten LD today. 2013 FD8 comes from 10.06 to 9.09 LD, risk-listed 2013 EL89 from 10.95 to 9.16 LD, and radar target 2013 FB8 from 10.83 to 9.23 LD.

Coming our way next, risk-listed 2010 GM23 arrives within ten LD on April 10th.

This report was generated at 1849 UTC with new discovery 2013 FU13 (MPEC) and follow-up in today's DOU MPEC for 2013 FD8, 2013 FB8, 2013 FK, and departed objects 2013 EE68 and 2013 EQ41, as well as observations of two risk-listed objects, 2012 YR1 from January and 2012 WR10 from December.



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 25 March '13

The MPC's NEO Confirmation Page has 6 listings

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

New MPECs  on 25 March '13

Minor Planet Electronic Circulars

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


MPEC 2013-F50 - "11:05 UT" - 2013 FU13


MPEC 2013-F49 - "11:00 UT" - 2013 FT13


<< DOU on 25 Mar. '13 >>  MPEC 2013-F48 - "06:04 UT" - Daily Orbit Update


<< OOC on 25 Mar. '13 >> MPEC 2013-F47 - "03:06 UT" - Observations and Orbits of Comets

Observers  on 25 March '13

A total of 52 observers appear in today's MPECs.

CodeObserver / observatory
J10Alicante Obs. in Spain, 1 in MPEC 2013-F47 -- 273P
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-F48 -- 2013 FD11
H21Astronomical Research Obs. Westfield in Illinois, 9 in MPEC 2013-F48 -- 2013 FY7, 2013 FB8, 2013 FA8, 2013 EO126, 2013 EL28, 2013 BY45, 2012 SQ56, 2007 YV29, 2001 TA2
I47Auger Obs. in Argentina, 2 in MPEC 2013-F47 -- C/2009 F4, 117P
I56Beckman Obs. in Spain, 1 in MPEC 2013-F47 -- 63P
C77Bernezzo Obs. in Italy, 1 in MPEC 2013-F47 -- P/2012 B1
I99Blanquita Obs. in Spain, 2 in MPEC 2013-F47 -- C/2011 J2, 63P
B96Brixiis Obs. in Belgium, 2 in MPEC 2013-F47 -- C/2012 S1, 63P
703Catalina Sky Survey (CSS) in Arizona, 3 in MPECs 2013-F47 & 2013-F48 -- C/2013 B2, 2007 EF, 1866
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPECs 2013-F48 & 2013-F50 -- 2013 FU13, 2013 FQ10, 2013 FD11
A77Chante-Perdrix Obs. in France, 1 in MPEC 2013-F47 -- C/2011 L4
I51Clinton Obs., 2 in MPEC 2013-F47 -- C/2012 S1, C/2011 UF305
I57Elche Obs., 10 in MPEC 2013-F47 -- C/2012 X1, C/2012 S1, P/2012 B1, C/2011 R1, C/2011 J2, 244P, 175P, 117P, 63P, 29P
F65&program code "&" (15) via Faulkes Telescope North in Hawaii, 1 in MPEC 2013-F47 -- 63P
372Geisei Obs. in Japan, 4 in MPEC 2013-F47 -- C/2013 E1, C/2013 D1, C/2012 S1, 273P
203GiaGa Obs. in Italy, 2 in MPEC 2013-F47 -- C/2012 X1, P/2012 B1
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2013-F47 -- C/2013 B2
048Hradec Kralove Obs. in the Czech Republic, 1 in MPEC 2013-F47 -- C/2012 S1
C32Ka-Dar Obs. TAU Station in Russia, 1 in MPEC 2013-F47 -- C/2005 L3
585Kiev Comet Station in the Ukraine, 5 in MPEC 2013-F47 -- C/2012 S1, C/2011 UF305, C/2009 P1, 175P, 63P
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 47 in MPECs 2013-F47 & 2013-F48 -- 2013 EJ89, 2013 AN20, 2012 YR1, 2012 WR10, 2012 VK76, 2012 VH5, 2012 DJ61, 2011 GN44, 2011 BN24, 2011 BA45, 2010 SO16, 2010 RM42, 2010 OS22, 2010 OF101, 2010 OD101, 2010 NJ1, 2010 MR87, 2010 LL34, 2010 JH87, 2010 HR80, 2010 CD19, 2010 AK2, 2010 AH30, 2010 AB78, 2009 WN, 2009 UP1, 2009 SW17, 2008 XM, 2008 TD4, 2008 EM9, 2008 AT28, 2007 WV4, 2007 RM133, 2006 JT, 2006 CX10, 2004 MX2, 2001 RX11, 1999 VF22, 1998 OK1, 88213, 277616, 248590, 248083, 214869, 136874, 5370, 274P
D95Kurihara Obs. in Japan, 6 in MPEC 2013-F47 -- C/2013 E2, C/2012 K1, P/2012 B1, C/2010 S1, C/2009 P1, 246P
J38La Vara Obs. in Spain, 4 in MPEC 2013-F47 -- C/2012 X1, C/2012 S1, C/2012 L2, 242P
130Lumezzane Obs. in Italy, 6 in MPEC 2013-F47 -- C/2012 X1, C/2012 F3, C/2005 L3, 280P, 273P, 63P
711McDonald Obs. in Texas, 12 in MPECs 2013-F48 & 2013-F49 -- 2013 FZ7, 2013 FT13, 2013 FB8, 2013 FA8, 2013 EQ41, 2013 EO126, 2013 EK89, 2013 EK28, 2013 EE68, 2004 XL35, 263976, 206910
213Montcabre Obs. in Spain, 3 in MPEC 2013-F47 -- C/2013 E2, C/2012 S1, 63P
C91Montevenere Obs., 2 in MPEC 2013-F47 -- C/2011 J2, 63P
900Moriyama Obs. in Japan, 11 in MPEC 2013-F47 -- C/2013 E2, C/2012 X2, C/2012 L2, C/2012 L1, P/2012 B1, C/2011 UF305, C/2011 J2, C/2009 P1, 244P, 175P, 63P
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2013-F48, 2013-F49 & 2013-F50 -- 2013 FU13, 2013 FT13, 2013 FD8, 2013 EP89
C23Olmen Obs. in Belgium, 14 in MPEC 2013-F47 -- C/2012 X1, C/2012 S1, C/2012 K1, P/2012 B1, C/2011 R1, C/2011 J2, C/2010 S1, C/2010 R1, 280P, 274P, 273P, 175P, 117P, 63P
B69Owls & Ravens Obs. in Germany, 2 in MPEC 2013-F47 -- C/2012 S1, C/2012 L2
I41Palomar Transient Factory in southern California, 1 in MPEC 2013-F48 -- 40267
A32Panker Obs. in Germany, 9 in MPEC 2013-F47 -- C/2012 Y1, C/2012 X1, C/2012 S1, C/2011 UF305, C/2009 P1, 242P, 175P, 63P, 36P
H23Pear Tree Obs. in Florida, 1 in MPEC 2013-F47 -- 63P
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 13 in MPEC 2013-F47 -- C/2012 X1, C/2012 S1, C/2012 L2, C/2012 L1, C/2011 R1, C/2011 J2, C/2006 S3, 273P, 244P, 175P, 117P, 63P, 29P
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2013-F47 -- P/2012 B1
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 7 in MPEC 2013-F47 -- C/2013 A1, C/2012 Y3, C/2011 UF305, C/2006 S3, 278P, 125P, 17P
W71Rand II Obs., 2 in MPEC 2013-F47 -- C/2008 S3, 189P
071Rhozen Obs. in Bulgaria, 1 in MPEC 2013-F48 -- 99942
233San Vito Obs. in Italy, 2 in MPEC 2013-F47 -- C/2011 J2, 63P
B70Sant Celoni Obs. in Spain, 1 in MPEC 2013-F47 -- C/2011 J2
E12Siding Spring Survey (SSS) in New South Wales, 16 in MPECs 2013-F47 & 2013-F48 -- 2013 FX7, 2013 FK, 2013 FB8, 2013 EU9, C/2013 A1, 2012 XE112, 2012 PQ28, 2009 FG1, 2008 GB110, 330233, 325102, 24761, 163732, 10563, 4957, 1580
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2013-F47 & 2013-F49 -- 2013 FT13, C/2012 S1
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2013-F48 -- 2013 FB8
P36ULTRA Obs., 1 in MPEC 2013-F47 -- C/2012 K5
B51Vallauris Obs. in France, 2 in MPEC 2013-F47 -- C/2012 S1, C/2012 L2
C90Vinyols Obs., 2 in MPEC 2013-F47 -- C/2012 L2, 63P
718Wiggins Obs. in Utah, 1 in MPEC 2013-F48 -- 2013 FC8
367Yatsuka Obs. in Japan, 18 in MPEC 2013-F47 -- C/2013 E2, C/2012 Y3, C/2012 V2, C/2012 S1, C/2012 L2, C/2012 L1, C/2012 J1, P/2012 B1, C/2012 A2, C/2011 R1, C/2011 J2, C/2010 S1, C/2009 P1, C/2006 S3, 273P, 246P, 117P, 63P
J08Zonalunar Obs. in Spain, 2 in MPEC 2013-F47 -- C/2012 V2, C/2011 L4
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-F47 -- 273P
H06#M. Suzuki via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-F47 -- C/2013 E2
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 13 in MPEC 2013-F47 -- C/2013 E2, C/2013 B2, C/2012 S3, C/2012 K8, C/2012 J1, P/2012 F2, C/2012 A1, C/2011 UF305, P/2011 R3, C/2011 J2, 273P, 262P, 246P
Q621program code 1 via iTelescope Obs. Siding Spring in New South Wales, 5 in MPEC 2013-F47 -- C/2012 Y3, C/2012 K6, 275P, 246P, 197P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 25 March '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
2013 FU13NEODyS16122081-2112113.94e-04-4.74-4.770NEODyS: "Based on 19 optical observations (of which 1 are rejected as outliers) from 2013-03-24.350 to 2013-03-25.259."
JPL Sentry13532063-2112279.7e-05-5.42-5.820JPL: "Analysis based on 19 observations spanning .90875 days (2013-Mar-24.34961 to 2013-Mar-25.25836)." Diameter approximately 0.013 km. from mean, weighted H=27.1.
2012 YR1JPL Sentry1353207715.7e-07-7.20-7.200JPL: "Analysis based on 30 observations spanning 23.330 days (2012-Dec-20.20945 to 2013-Jan-12.53922)." Diameter approximately 0.017 km. from mean, weighted H=26.5.
2012 WR10JPL Sentry13532087-210236.6e-07-8.29-8.410JPL: "Analysis based on 45 observations spanning 26.156 days (2012-Nov-22.21759 to 2012-Dec-18.37324)." Diameter approximately 0.007 km. from mean, weighted H=28.5.
NEODyS13532081-2106116.16e-07-8.32-8.780NEODyS: "Based on 45 optical observations (of which 1 are rejected as outliers) from 2012-11-22.218 to 2012-12-18.374."

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 25 March '13

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

1849Generated Traffic Report
1612Noted that NEODyS has posted 2013 FU13 as an impact risk - see above
1353Noted that JPL Sentry has updated its 2012 WR10 risk assessment - see above
Noted that NEODyS has updated its 2012 WR10 risk assessment - see above
Noted that JPL Sentry has updated its 2012 YR1 risk assessment - see above
Noted that JPL Sentry has posted 2013 FU13 as an impact risk - see above
Grabbed MPEC 2013-F48 - Daily Orbit Update - see above
Grabbed MPEC 2013-F49 - 2013 FT13 - see above
Grabbed MPEC 2013-F50 - 2013 FU13 - see above
0406Grabbed MPEC 2013-F47 - Observations and Orbits of Comets - see above