Contents  on 25 March '12

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 '12

Nine objects reported inside ten LD

Nine asteroids are reported flying within ten lunar distances (LD) of Earth today. Intruder 2012 FS35, which is a new discovery, is inside the Earth-Moon system, moving from 1.44 to 0.65 LD, and intruder 2012 FP35, also newly announced, comes in from 3.95 to 0.88 LD. Inside Earth's Hill sphere, new discovery 2012 FT35 is outbound from 1.89 to 2.21 LD and 2012 FU23 comes its closest to Earth this time around, reaching 3.06 LD at 2129 UTC. Further out, newly announced 2012 FX35 moves outward from 3.90 to 4.51 LD, new discovery 2012 FM35 from 5.17 to 5.69 LD, and 2012 EL8 from 9.5 to 9.9 LD*, while 2012 EO8 departs from inside ten LD, traveling from 9.90 to 12.56 LD, and 2012 FV23 comes inward from 9.85 to 8.87 LD.

Next up, intruder 2012 EG5 (risk-listed radar target) arrives inside ten LD tomorrow, new discovery 2012 FW35 on March 30th, and 2007 HV4 on April 14th.

This report was updated at 0109 March 26th UTC with new discoveries 2012 FX35 (MPEC), 2012 FW35 (MPEC), 2012 FT35 (MPEC), 2012 FS35 (MPEC), and 2012 FP35 (MPEC), and, earlier, 2012 FM35 (MPEC) plus follow-up in today's DOU MPEC for 2012 FU23, 2012 EP10, 2012 EG5, and 2012 DA14. This report was previously updated at 1629 and 2002 UTC.


Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Earth's Hill sphere (of gravitational influence) is estimated to extend out to around 3.89 LD. 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 '12

The MPC's NEO Confirmation Page has 18 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eighteen objects listed. Of these, sixteen were "one nighters." The Tracking News counted a total of 38 listings on the NEOCP on this day.

New MPECs  on 25 March '12

Minor Planet Electronic Circulars

There were seventeen MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2012-F87 - "23:08 UT" - Comet P/2012 F5 (Gibbs)


MPEC 2012-F86 - "23:00 UT" - 2012 FX35


MPEC 2012-F85 - "22:58 UT" - 2012 FV35


MPEC 2012-F84 - "22:56 UT" - 2012 FW35


MPEC 2012-F83 - "22:54 UT" - 2012 FU35


MPEC 2012-F82 - "22:52 UT" - 2012 FT35


MPEC 2012-F81 - "21:37 UT" - 2012 FS35


MPEC 2012-F80 - "21:35 UT" - 2012 FR35


MPEC 2012-F79 - "21:31 UT" - 2012 FQ35


MPEC 2012-F78 - "21:29 UT" - 2012 FP35


MPEC 2012-F77 - "19:30 UT" - 2012 FO35


MPEC 2012-F76 - "18:58 UT" - 2012 FN35


MPEC 2012-F75 - "18:32 UT" - 2012 FM35


MPEC 2012-F74 - "18:25 UT" - 2012 FL35


MPEC 2012-F73 - "18:20 UT" - 2012 FK35


<< DOU on 25 Mar. '12 >>  MPEC 2012-F72 - "06:03 UT" - Daily Orbit Update


MPEC 2012-F71 - "00:42 UT" - 2012 FE10

Observers  on 25 March '12

A total of 47 observers appeared in this day's MPECs.

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 1 in MPEC 2012-F86 -- 2012 FX35
E23Arcadia Obs. in New South Wales, 1 in MPEC 2012-F87 -- P/2012 F5
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPECs 2012-F72 & 2012-F79 -- 2012 FQ35, 2012 EA2, 2012 DJ4, 2012 DF61, 2012 AA11
I47Auger Obs. in Argentina, 1 in MPEC 2012-F87 -- P/2012 F5
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2012-F72 -- 2012 EL5
B88Bigmuskie Obs. in Italy, 1 in MPEC 2012-F72 -- 2012 AA11
300Bisei Spaceguard Center in Japan, 5 in MPECs 2012-F71, 2012-F78, 2012-F79, 2012-F80 & 2012-F86 -- 2012 FX35, 2012 FR35, 2012 FQ35, 2012 FP35, 2012 FE10
703Catalina Sky Survey (CSS) in Arizona, 12 in MPECs 2012-F72, 2012-F73, 2012-F78, 2012-F79, 2012-F80, 2012-F81 & 2012-F86 -- 2012 FX35, 2012 FS35, 2012 FR35, 2012 FQ35, 2012 FP35, 2012 FK35, 53319, 320378, 234341, 153195, 141531, 138359
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPEC 2012-F72 -- 2012 FY23, 2012 FS23
970Chelmsford Obs. in England, 1 in MPEC 2012-F79 -- 2012 FQ35
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2012-F72 -- 2011 SY120
448Desert Moon Obs. in New Mexico, 5 in MPEC 2012-F72 -- 2012 EG5, 2012 DK61, 1998 HJ3, 1995 DW1, 32906
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 7 in MPECs 2012-F72 & 2012-F73 -- 2012 FK35, 2012 ES14, 2012 EG5, 2012 DX75, 2011 SL102, 2004 QJ7, 263976
113Drebach Obs. in Germany, 2 in MPECs 2012-F71 & 2012-F86 -- 2012 FX35, 2012 FE10
I48El Catalejo Obs., 1 in MPEC 2012-F87 -- P/2012 F5
J95Great Shefford Obs. in England, 10 in MPECs 2012-F71, 2012-F72, 2012-F75, 2012-F78, 2012-F79, 2012-F80, 2012-F81, 2012-F82, 2012-F86 & 2012-F87 -- 2012 FX35, 2012 FU23, 2012 FT35, 2012 FS35, 2012 FR35, 2012 FQ35, 2012 FP35, 2012 FM35, 2012 FE10, P/2012 F5
A17Guidestar Obs. in Germany, 3 in MPECs 2012-F78, 2012-F81 & 2012-F86 -- 2012 FX35, 2012 FS35, 2012 FP35
379Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2012-F72 -- 2012 DX75, 2011 YV15
B15Inastars Obs. in Germany, 1 in MPEC 2012-F72 -- 2012 EG5
246KLENOT in the Czech Republic, 4 in MPECs 2012-F78, 2012-F79, 2012-F81 & 2012-F86 -- 2012 FX35, 2012 FS35, 2012 FQ35, 2012 FP35
695{Tomas Vorobjov in England via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2012-F87 -- P/2012 F5
704LINEAR in New Mexico, 8 in MPECs 2012-F72 & 2012-F75 -- 2012 FM35, 2011 YV15, 2011 SY120, 1998 KN3, 267221, 7358, 4055, 1627
C01Lohrmann Obs. in Germany, 12 in MPEC 2012-F72 -- 2012 EL5, 2012 DX75, 2012 BC20, 2012 AA11, 2011 YV15, 267221, 234341, 163243, 162038, 153195, 152667, 138524
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2012-F73, 2012-F82 & 2012-F87 -- 2012 FT35, 2012 FK35, P/2012 F5
C10Maisoncelles Obs. in France, 1 in MPEC 2012-F87 -- P/2012 F5
B90Malina River Obs. in Italy, 2 in MPECs 2012-F79 & 2012-F87 -- 2012 FQ35, P/2012 F5
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-F72 -- 2006 AL8
118Modra Obs. in Slovakia, 1 in MPEC 2012-F73 -- 2012 FK35
C91Montevenere Obs., 1 in MPEC 2012-F79 -- 2012 FQ35
G96Mt. Lemmon Survey (MLS) in Arizona, 15 in MPECs 2012-F72, 2012-F76, 2012-F77, 2012-F82, 2012-F83, 2012-F84, 2012-F85 & 2012-F87 -- 2012 FW35, 2012 FV35, 2012 FU35, 2012 FT35, 2012 FO35, 2012 FN35, P/2012 F5, 2012 EC, 2012 DW30, 2012 DL31, 2009 MC9, 2006 SW5, 90403, 7025, 2061
A24New Millennium Obs. in Italy, 30 in MPECs 2012-F72, 2012-F79, 2012-F80, 2012-F81 & 2012-F86 -- 2012 FX35, 2012 FS35, 2012 FR35, 2012 FQ35, 2012 DX75, 2012 DH4, 2012 BC20, 2011 YV15, 2011 SL102, 2004 QJ7, 2002 EM6, 68267, 36183, 317643, 306595, 275558, 263976, 238063, 21277, 184990, 171819, 154555, 152667, 138524, 101873, 9400, 6455, 5620, 3352, 1862
C47Nonndorf Obs. in Austria, 5 in MPEC 2012-F72 -- 2012 DX75, 263976, 24475, 141018, 6455
J69North Obs. in England, 2 in MPECs 2012-F72 & 2012-F79 -- 2012 FQ35, 2012 DH4
411Oizumi Obs. in Japan, 1 in MPEC 2012-F72 -- 312942
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2012-F71 -- 2012 FE10
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 9 in MPEC 2012-F72 -- 2012 ES14, 2012 EL5, 2012 EK8, 2012 DX75, 2012 AA11, 2011 YV15, 2011 SL102, 2004 QJ7, 2002 EM6
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-F87 -- P/2012 F5
D03Rantiga Obs., 1 in MPEC 2012-F71 -- 2012 FE10
854Sabino Canyon Obs. in Arizona, 4 in MPECs 2012-F75, 2012-F78, 2012-F79 & 2012-F80 -- 2012 FR35, 2012 FQ35, 2012 FP35, 2012 FM35
H36Sandlot Obs. in Kansas, 6 in MPECs 2012-F73, 2012-F75, 2012-F78, 2012-F79, 2012-F80 & 2012-F87 -- 2012 FR35, 2012 FQ35, 2012 FP35, 2012 FM35, 2012 FK35, P/2012 F5
204Schiaparelli Obs. in Italy, 9 in MPECs 2012-F72, 2012-F73, 2012-F75, 2012-F78, 2012-F79 & 2012-F87 -- 2012 FS23, 2012 FQ35, 2012 FP35, 2012 FM35, 2012 FK35, P/2012 F5, 2012 DO, 2011 SY120, 2009 AV
E12Siding Spring Survey (SSS) in New South Wales, 12 in MPEC 2012-F72 -- 2012 DO, 2009 AM15, 2008 EY5, 2008 EP6, 86039, 85818, 68348, 312473, 308127, 277617, 7341, 1980
510Siegen Obs. in Germany, 2 in MPEC 2012-F72 -- 2012 DX75, 2012 DH4
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2012-F72 & 2012-F74 -- 2012 FL35, 2010 OD101, 238063
291Spacewatch 1.8m telescope in Arizona, 17 in MPECs 2012-F72, 2012-F73, 2012-F74, 2012-F76, 2012-F77, 2012-F83 & 2012-F85 -- 2012 FV35, 2012 FU35, 2012 FQ1, 2012 FO35, 2012 FN35, 2012 FL35, 2012 FK35, 2012 EV14, 2012 ES10, 2012 EP10, 2012 DJ61, 2012 DA14, 2012 BJ86, 2012 BB124, 2011 TK, 2010 DF1, 2008 EY68
I93St. Pardon de Conques Obs. in France, 6 in MPECs 2012-F73, 2012-F75, 2012-F79, 2012-F80, 2012-F81 & 2012-F86 -- 2012 FX35, 2012 FS35, 2012 FR35, 2012 FQ35, 2012 FM35, 2012 FK35
926Tenagra II Obs. in Arizona, 1 in MPEC 2012-F71 -- 2012 FE10
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 25 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 FN35JPL Sentry2101211012.3e-10-9.90-9.900JPL: "Analysis based on 11 observations spanning 2.0229 days (2012-Mar-23.38861 to 2012-Mar-25.41146)." Diameter approximately 0.038 km. from mean, weighted H=24.8.
2012 FQ1JPL Sentry16242025-203444.8e-08-4.03-4.170JPL: "Analysis based on 33 observations spanning 8.2070 days (2012-Mar-16.16837 to 2012-Mar-24.37542)." Diameter approximately 0.513 km. from mean, weighted H=19.1.
NEODyS16242025-202921.42e-08-4.56-4.620NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2012-03-16.169 to 2012-03-24.376."
2012 ES10JPL Sentry16242054-2069109.7e-07-5.02-5.610JPL: "Analysis based on 30 observations spanning 8.9900 days (2012-Mar-15.36929 to 2012-Mar-24.35925)." Diameter approximately 0.062 km. from mean, weighted H=23.7.
2012 EP10JPL Sentry16242056-2111321.0e-04-6.47-6.770JPL: "Analysis based on 27 observations spanning 9.0425 days (2012-Mar-15.27159 to 2012-Mar-24.31414)." Diameter approximately 0.005 km. from mean, weighted H=29.2.
2012 EG5JPL Sentry1624210711.8e-07-6.74-6.740JPL: "Analysis based on 129 observations spanning 11.682 days (2012-Mar-13.30201 to 2012-Mar-24.98405)." Diameter approximately 0.049 km. from mean, weighted H=24.2.
2012 ECJPL Sentry16242083-209931.5e-06-5.55-5.790JPL: "Analysis based on 87 observations spanning 22.967 days (2012-Mar-01.3419 to 2012-Mar-24.30928)." Diameter approximately 0.067 km. from mean, weighted H=23.5.
NEODyS16242090-209017.68e-07-5.84-5.840NEODyS: "Based on 87 optical observations (of which 0 are rejected as outliers) from 2012-03-01.343 to 2012-03-24.310."
2012 DA14JPL Sentry16242020-20571072.8e-04-3.12-3.690JPL: "Analysis based on 162 observations spanning 30.459 days (2012-Feb-23.03431 to 2012-Mar-24.49316)." Diameter approximately 0.045 km. from mean, weighted H=24.4.
NEODyS16242020-20892654.76e-04-2.99-3.660NEODyS: "Based on 165 optical observations (of which 4 are rejected as outliers) from 2012-02-23.029 to 2012-03-24.494."

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 '12

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

0109 3/26Updated Traffic Report
0019 3/26Grabbed MPEC 2012-F87 - Comet P/2012 F5 (Gibbs) - see above
2304Grabbed MPEC 2012-F82 - 2012 FT35 - see above
Grabbed MPEC 2012-F83 - 2012 FU35 - see above
Grabbed MPEC 2012-F84 - 2012 FW35 - see above
Grabbed MPEC 2012-F85 - 2012 FV35 - see above
Grabbed MPEC 2012-F86 - 2012 FX35 - see above
2201Grabbed MPEC 2012-F78 - 2012 FP35 - see above
Grabbed MPEC 2012-F79 - 2012 FQ35 - see above
Grabbed MPEC 2012-F80 - 2012 FR35 - see above
Grabbed MPEC 2012-F81 - 2012 FS35 - see above
2101Noted that JPL Sentry has posted 2012 FN35 as an impact risk - see above
1950Grabbed MPEC 2012-F77 - 2012 FO35 - see above
1921Grabbed MPEC 2012-F76 - 2012 FN35 - see above
1843Grabbed MPEC 2012-F73 - 2012 FK35 - see above
Grabbed MPEC 2012-F74 - 2012 FL35 - see above
Grabbed MPEC 2012-F75 - 2012 FM35 - see above
1624Noted that JPL Sentry has updated its 2012 DA14 risk assessment - see above
Noted that NEODyS has updated its 2012 DA14 risk assessment - see above
Noted that JPL Sentry has updated its 2012 EC risk assessment - see above
Noted that NEODyS has updated its 2012 EC risk assessment - see above
Noted that JPL Sentry has reposted 2012 EG5 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 EP10 risk assessment - see above
Noted that JPL Sentry has updated its 2012 ES10 risk assessment - see above
Noted that JPL Sentry has updated its 2012 FQ1 risk assessment - see above
Noted that NEODyS has updated its 2012 FQ1 risk assessment - see above
Grabbed MPEC 2012-F72 - Daily Orbit Update - see above
0216Grabbed MPEC 2012-F71 - 2012 FE10 - see above