Contents  on 17 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 17 March '12

Six objects reported inside ten LD

There are six objects reported flying inside ten lunar distances (LD) of our planet today. 2012 EN5 exits Earth's Hill sphere and, out further, risk-listed radar target 2012 DW60 moves away from 6.05 to 7.21 LD, 2012 EJ5 from 6.55 to 7.11 LD, 2012 EL8 from 7.3 to 7.4 LD*, and radar target 2012 DH54 from 7.81 to 8.79 LD, while newly discovered 2012 FG departs from inside ten LD, moving from 8.16 to 11.64 LD.

Coming our way, 2012 EO8 arrives inside ten LD tomorrow, risk-listed 2012 EK5 the day after, intruder 2012 EG5 (risk-listed radar target) on March 27th, and returning 2007 HV4 on April 14th.

This report was updated at 1933 UTC with new discovery 2012 FG (MPEC), and, earlier, with follow-up in today's DOU MPEC for 2012 EP10, 2012 EO8, 2012 EG5, and 2012 DA14, plus departed 2012 DJ54 and 2012 DY and astrometry from December for 2011 YW15 and 2000 YA. This report was previously updated at 1549 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 17 March '12

The MPC's NEO Confirmation Page has 26 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 26 objects listed. Of these, twelve were "one nighters." So far The Tracking News has counted a total of 49 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 17 March '12

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been fifteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2012-F29 - "23:41 UT" - 2012 FN


MPEC 2012-F28 - "23:38 UT" - 2012 FM


MPEC 2012-F27 - "17:52 UT" - 2012 FJ


MPEC 2012-F26 - "17:44 UT" - 2012 EW14


MPEC 2012-F25 - "17:42 UT" - 2012 EV14


MPEC 2012-F24 - "17:40 UT" - 2012 EU14


MPEC 2012-F23 - "17:27 UT" - 2012 FH


MPEC 2012-F22 - "17:22 UT" - 2012 FG


MPEC 2012-F21 - "17:20 UT" - 2012 FF


MPEC 2012-F20 - "17:17 UT" - 2012 FE


MPEC 2012-F19 - "17:00 UT" - 2012 ES14


MPEC 2012-F18 - "16:54 UT" - 2012 ET14


MPEC 2012-F17 - "16:39 UT" - 2012 ER14


<< DOU on 17 Mar. '12 >>  MPEC 2012-F16 - "06:02 UT" - Daily Orbit Update


MPEC 2012-F15 - "02:33 UT" - 2010 VQ11

Observers  on 17 March '12

A total of 42 observers appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2012-F16 -- 2012 EO5
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2012-F18, 2012-F27 & 2012-F28 -- 2012 FM, 2012 FJ, 2012 ET14
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2012-F16 -- 2012 EL5
B88Bigmuskie Obs. in Italy, 1 in MPEC 2012-F16 -- 138359
300Bisei Spaceguard Center in Japan, 8 in MPEC 2012-F16 -- 2011 YW15, 2011 YW1, 2011 YA, 2011 XA3, 2011 SL102, 2001 YE4, 2000 YA, 24475
160Castelmartini Obs. in Italy, 4 in MPEC 2012-F16 -- 2012 EA12, 2012 BT23, 2011 XO3, 2011 WV134
703Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2012-F16, 2012-F22, 2012-F27 & 2012-F28 -- 2012 FM, 2012 FJ, 2012 FG, 2009 AM15, 2004 FF29, 85628, 302311, 155334, 141531, 3352
807/program code "/" (24) via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2012-F15 -- 2010 VQ11
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPECs 2012-F16, 2012-F19, 2012-F26 & 2012-F27 -- 2012 FJ, 2012 EW14, 2012 ES14, 2012 EO8
106Crni Vrh Obs. in Slovenia, 2 in MPECs 2012-F27 & 2012-F28 -- 2012 FM, 2012 FJ
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2012-F27 -- 2012 FJ
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 3 in MPEC 2012-F16 -- 2012 EO8, 2012 EK8, 2012 DH4
639Dresden Obs. in Germany, 1 in MPEC 2012-F16 -- 2012 BJ134
I48El Catalejo Obs., 1 in MPEC 2012-F27 -- 2012 FJ
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2012-F16 -- 2012 BJ134
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-F17 -- 2012 ER14
E100Tim Lister in southern California via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-F19 -- 2012 ES14
J95Great Shefford Obs. in England, 1 in MPEC 2012-F28 -- 2012 FM
A17Guidestar Obs. in Germany, 2 in MPEC 2012-F16 -- 2012 DK61, 2012 AN23
H15ISON-NM Obs. in New Mexico, 2 in MPEC 2012-F16 -- 2011 WV134, 7358
B15Inastars Obs. in Germany, 1 in MPEC 2012-F16 -- 2012 EG5
246KLENOT in the Czech Republic, 3 in MPECs 2012-F16 & 2012-F19 -- 2012 ES14, 2012 EG5, 2003 EO16
E19Kingsgrove Obs. in New South Wales, 1 in MPEC 2012-F16 -- 162421
046Klet Obs. in the Czech Republic, 1 in MPEC 2012-F16 -- 2012 BJ134
H05Kline Obs. in Colorado, 2 in MPEC 2012-F16 -- 2012 EO8, 2012 EK8
704LINEAR in New Mexico, 12 in MPECs 2012-F16, 2012-F22 & 2012-F27 -- 2012 FJ, 2012 FG, 2012 EO5, 2012 DH4, 1998 KN3, 267221, 208565, 162186, 7358, 4055, 1943, 1627
950.Ovidiu Vaduvescu via La Palma in the Canary Islands, 1 in MPEC 2012-F16 -- 2012 DA14
844Los Molinos Obs. in Uruguay, 1 in MPEC 2012-F22 -- 2012 FG
6885Larry Wasserman via Lowell Obs. Anderson Mesa Station in Arizona, 1 in MPEC 2012-F15 -- 2010 VQ11
H01Magdalena Ridge Obs. (MRO) in New Mexico, 11 in MPECs 2012-F16, 2012-F17, 2012-F18, 2012-F20, 2012-F21, 2012-F23, 2012-F24, 2012-F25, 2012-F26, 2012-F27 & 2012-F28 -- 2012 FM, 2012 FJ, 2012 FH, 2012 FF, 2012 FE, 2012 EW14, 2012 EV14, 2012 EU14, 2012 ET14, 2012 ER14, 2012 EP10
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2012-F16 -- 2012 DJ54, 2012 CA53
C91Montevenere Obs., 3 in MPEC 2012-F16 -- 312942, 24475, 137925
G96Mt. Lemmon Survey (MLS) in Arizona, 24 in MPECs 2012-F16, 2012-F17, 2012-F18, 2012-F20, 2012-F21, 2012-F23, 2012-F24, 2012-F25, 2012-F26, 2012-F27 & 2012-F29 -- 2012 FN, 2012 FJ, 2012 FH, 2012 FF, 2012 FE, 2012 EW14, 2012 EV14, 2012 EU14, 2012 ET14, 2012 ER14, 2012 DN, 2012 DL31, 2012 DA33, 2003 HR32, 2001 UV16, 2001 CK32, 39557, 16834, 153814, 141053, 5324, 4503, 2059, 1862
C47Nonndorf Obs. in Austria, 1 in MPEC 2012-F16 -- 2012 DH4
F51Pan-STARRS 1 (PS1) in Hawaii, 10 in MPECs 2012-F16 & 2012-F19 -- 2012 ES14, 2012 EC, 2010 LY63, 2010 LR33, 2009 QE8, 1995 DW1, 41429, 212546, 4055, 3271
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 2 in MPECs 2012-F16 & 2012-F27 -- 2012 FJ, 2012 EO8
461SZTE Asteroid Program in Hungary, 2 in MPEC 2012-F16 -- 85275, 40263
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2012-F22, 2012-F27 & 2012-F28 -- 2012 FM, 2012 FJ, 2012 FG
233San Vito Obs. in Italy, 3 in MPEC 2012-F16 -- 2012 BJ134, 2012 AA11, 32906
H36Sandlot Obs. in Kansas, 1 in MPEC 2012-F26 -- 2012 EW14
204Schiaparelli Obs. in Italy, 2 in MPECs 2012-F16 & 2012-F17 -- 2012 ER14, 2012 DY
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2012-F16 -- 2005 CJ, 136618
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2012-F16, 2012-F17, 2012-F18 & 2012-F24 -- 2012 EY11, 2012 EU14, 2012 ET14, 2012 ES10, 2012 ER14, 2012 EG5, 2012 EC, 2012 DA14
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 March '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 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 ET14JPL Sentry19182029-2093171.9e-08-3.11-3.700JPL: "Analysis based on 26 observations spanning 2.0566 days (2012-Mar-15.21007 to 2012-Mar-17.266695)." Diameter approximately 1.300 km. from mean, weighted H=17.0.
2012 ER14JPL Sentry19182022-2105372.0e-08-5.21-5.610JPL: "Analysis based on 31 observations spanning 2.9244 days (2012-Mar-14.23356 to 2012-Mar-17.15799)." Diameter approximately 0.315 km. from mean, weighted H=20.2.
2012 EY11JPL Sentry1544R E M O V E DJPL: Risk listing removed at 0934 UTC.
2012 ES10JPL Sentry15442053-2112245.3e-06-4.41-4.790JPL: "Analysis based on 20 observations spanning 1.8319 days (2012-Mar-15.36929 to 2012-Mar-17.20122)." Diameter approximately 0.061 km. from mean, weighted H=23.7.
NEODyS15442053-2086164.53e-06-4.48-4.840NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2012-03-15.370 to 2012-03-17.202."
2012 EP10JPL Sentry15442046-2112808.1e-05-6.53-7.280JPL: "Analysis based on 18 observations spanning .95623 days (2012-Mar-15.27159 to 2012-Mar-16.22782)." Diameter approximately 0.005 km. from mean, weighted H=29.2.
NEODyS15442058-2091446.58e-05-6.57-7.310NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2012-03-15.272 to 2012-03-16.229."
2012 EG5JPL Sentry1544204811.7e-08-7.34-7.340JPL: "Analysis based on 40 observations spanning 3.8580 days (2012-Mar-13.30201 to 2012-Mar-17.16006)." Diameter approximately 0.049 km. from mean, weighted H=24.2.
NEODyS15442090-209011.45e-09-8.76-8.760NEODyS: "Based on 40 optical observations (of which 0 are rejected as outliers) from 2012-03-13.303 to 2012-03-17.161."
2012 ECJPL Sentry15442083-210158.5e-06-4.80-4.930JPL: "Analysis based on 72 observations spanning 15.842 days (2012-Mar-01.3419 to 2012-Mar-17.18342)." Diameter approximately 0.067 km. from mean, weighted H=23.5.
NEODyS15442077-208833.27e-07-6.16-6.20NEODyS: "Based on 72 optical observations (of which 0 are rejected as outliers) from 2012-03-01.343 to 2012-03-17.184."
2012 DJ54JPL Sentry15442068-2112251.8e-04-5.75-5.990JPL: "Analysis based on 25 observations spanning 16.858 days (2012-Feb-27.46779 to 2012-Mar-15.325818)." Diameter approximately 0.007 km. from mean, weighted H=28.5.
NEODyS15442068-208638.94e-05-5.98-6.030NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2012-02-27.469 to 2012-03-15.327."
2012 DA14JPL Sentry15442020-2044339.3e-05-3.41-3.810JPL: "Analysis based on 156 observations spanning 22.490 days (2012-Feb-23.03431 to 2012-Mar-16.52408)." Diameter approximately 0.045 km. from mean, weighted H=24.4.
NEODyS15442020-20902844.02e-04-3.07-3.770NEODyS: "Based on 159 optical observations (of which 4 are rejected as outliers) from 2012-02-23.029 to 2012-03-16.525."

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 17 March '12

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

2358Grabbed MPEC 2012-F28 - 2012 FM - see above
Grabbed MPEC 2012-F29 - 2012 FN - see above
1933Updated Traffic Report
1918Noted that JPL Sentry has posted 2012 ER14 as an impact risk - see above
Noted that JPL Sentry has posted 2012 ET14 as an impact risk - see above
1800Grabbed MPEC 2012-F20 - 2012 FE - see above
Grabbed MPEC 2012-F21 - 2012 FF - see above
Grabbed MPEC 2012-F22 - 2012 FG - see above
Grabbed MPEC 2012-F23 - 2012 FH - see above
Grabbed MPEC 2012-F24 - 2012 EU14 - see above
Grabbed MPEC 2012-F25 - 2012 EV14 - see above
Grabbed MPEC 2012-F26 - 2012 EW14 - see above
Grabbed MPEC 2012-F27 - 2012 FJ - see above
1717Grabbed MPEC 2012-F17 - 2012 ER14 - see above
Grabbed MPEC 2012-F18 - 2012 ET14 - see above
Grabbed MPEC 2012-F19 - 2012 ES14 - see above
1544Noted 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 DJ54 risk assessment - see above
Noted that NEODyS has updated its 2012 DJ54 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 updated its 2012 EG5 risk assessment - see above
Noted that NEODyS has updated its 2012 EG5 risk assessment - see above
Noted that JPL Sentry has updated its 2012 EP10 risk assessment - see above
Noted that NEODyS has posted 2012 EP10 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 ES10 risk assessment - see above
Noted that NEODyS has posted 2012 ES10 as an impact risk - see above
Noted that JPL Sentry has removed 2012 EY11 as an impact risk - see above
Grabbed MPEC 2012-F16 - Daily Orbit Update - see above
0516Grabbed MPEC 2012-F15 - 2010 VQ11 - see above