Contents  on 24 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 24 March '12

Five objects reported inside ten LD

There are five visitors reported flying within ten lunar distances (LD) of Earth today. Newly announced 2012 FU23 is inbound from 8.38 to 4.79 LD and 2012 FV23, also newly discovered, comes inside ten LD, passing from 10.92 to 9.85 LD. 2012 EO8 is moving away from 7.36 to 9.90 LD and 2012 EL8 from 9.1 to 9.5 LD*, while risk-listed 2012 EK5 leaves ten LD, traveling from 8.58 to 11.39 LD.

Coming next, radar target intruder 2012 EG5 arrives inside ten LD on March 27th and 2007 HV4 comes inside on April 14th.

This report was updated at 1721 UTC with new discoveries 2012 FV23 (MPEC) and 2012 FU23 (MPEC), and earlier with follow-up in today's DOU MPEC for 2012 FG, 2012 EP10, 2012 EG5, and 2012 DA14. Reports were previously posted at 0110 and 1607 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 24 March '12

The MPC's NEO Confirmation Page has 22 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 22 objects listed. Of these, thirteen were "one nighters." So far The Tracking News has counted a total of 48 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 24 March '12

Minor Planet Electronic Circulars

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


MPEC 2012-F70 - "14:24 UT" - 2012 FZ23


MPEC 2012-F69 - "14:02 UT" - 2012 FY23


MPEC 2012-F68 - "12:41 UT" - 2012 FX23


MPEC 2012-F67 - "12:39 UT" - 2012 FW23


MPEC 2012-F66 - "12:37 UT" - 2012 FV23


MPEC 2012-F65 - "12:35 UT" - 2012 FU23


MPEC 2012-F64 - "12:33 UT" - 2012 FT23


MPEC 2012-F63 - "12:31 UT" - 2012 FS23


<< DOU on 24 Mar. '12 >>  MPEC 2012-F62 - "06:02 UT" - Daily Orbit Update


MPEC 2012-F61 - "01:13 UT" - 2011 SY120


MPEC 2012-F60 - "00:57 UT" - 2012 FD23

Observers  on 24 March '12

A total of 31 observers appear in today's MPECs.

CodeObserver / observatory
B17AZT-8 Evpatoria in the Ukraine, 1 in MPEC 2012-F62 -- 189008
E23Arcadia Obs. in New South Wales, 2 in MPECs 2012-F60 & 2012-F69 -- 2012 FY23, 2012 FD23
I47Auger Obs. in Argentina, 1 in MPEC 2012-F60 -- 2012 FD23
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2012-F62 -- 2012 DG31
B88Bigmuskie Obs. in Italy, 2 in MPEC 2012-F62 -- 2012 DU30, 2012 BC20
703Catalina Sky Survey (CSS) in Arizona, 7 in MPECs 2012-F62, 2012-F63 & 2012-F66 -- 2012 FV23, 2012 FS23, 2006 VY13, 2004 QJ7, 302830, 231937, 159857
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPECs 2012-F60, 2012-F62, 2012-F69 & 2012-F70 -- 2012 FZ23, 2012 FY23, 2012 FD23
448Desert Moon Obs. in New Mexico, 5 in MPEC 2012-F62 -- 2012 CC17, 2002 WP, 1998 HJ3, 319988, 294739
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 4 in MPEC 2012-F62 -- 2012 EK8, 2011 SY120, 317643, 21277
I48El Catalejo Obs., 1 in MPEC 2012-F60 -- 2012 FD23
E100Tim Lister in southern California via Faulkes Telescope South in New South Wales, 2 in MPECs 2012-F60 & 2012-F68 -- 2012 FX23, 2012 FD23
J95Great Shefford Obs. in England, 4 in MPECs 2012-F61, 2012-F64, 2012-F65 & 2012-F66 -- 2012 FV23, 2012 FU23, 2012 FT23, 2011 SY120
A17Guidestar Obs. in Germany, 9 in MPEC 2012-F62 -- 2012 FJ, 2012 EO5, 2012 EL5, 2012 EB2, 2012 DX75, 2012 DU30, 2012 BJ11, 2008 TZ3, 1999 JO8
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2012-F62 -- 208565
B15Inastars Obs. in Germany, 1 in MPEC 2012-F62 -- 2012 EG5
704LINEAR in New Mexico, 9 in MPECs 2012-F61 & 2012-F62 -- 2012 DX75, 2011 SY120, 2008 GD, 2004 VB, 275558, 21088, 162186, 152667, 8567
844Los Molinos Obs. in Uruguay, 1 in MPEC 2012-F62 -- 2011 SY120
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2012-F64, 2012-F65, 2012-F66 & 2012-F70 -- 2012 FZ23, 2012 FV23, 2012 FU23, 2012 FT23
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPECs 2012-F62 & 2012-F65 -- 2012 FU23, 2012 EP10
B67Mirasteilas Obs. in Switzerland, 9 in MPEC 2012-F62 -- 2012 FJ, 2012 EM8, 2012 EG5, 2012 BJ11, 2012 AN23, 2011 YM63, 2010 LR33, 2003 EO16, 1998 KN3
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2012-F62, 2012-F63, 2012-F64, 2012-F65, 2012-F67, 2012-F68 & 2012-F70 -- 2012 FZ23, 2012 FX23, 2012 FW23, 2012 FU23, 2012 FT23, 2012 FS23, 2012 FG, 2012 FD1, 281365
A24New Millennium Obs. in Italy, 12 in MPEC 2012-F62 -- 2012 BJ134, 2012 AA11, 32906, 24475, 163000, 162038, 143651, 141018, 137925, 6050, 4055, 3103
J69North Obs. in England, 1 in MPEC 2012-F62 -- 2012 DH4
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2012-F63 -- 2012 FS23
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2012-F60 -- 2012 FD23
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2012-F65, 2012-F66 & 2012-F70 -- 2012 FZ23, 2012 FV23, 2012 FU23
H36Sandlot Obs. in Kansas, 3 in MPECs 2012-F62, 2012-F66 & 2012-F70 -- 2012 FZ23, 2012 FV23, 2011 SY120
E12Siding Spring Survey (SSS) in New South Wales, 4 in MPECs 2012-F60, 2012-F62, 2012-F69 & 2012-F70 -- 2012 FZ23, 2012 FY23, 2012 FD23, 2008 VU4
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2012-F62 -- 318160, 189008, 186822
291Spacewatch 1.8m telescope in Arizona, 18 in MPECs 2012-F62, 2012-F67, 2012-F68 & 2012-F69 -- 2012 FY23, 2012 FX23, 2012 FW23, 2012 FR1, 2012 FQ1, 2012 FA14, 2012 EY11, 2012 EW14, 2012 ES10, 2012 ER14, 2012 EH5, 2012 EG5, 2012 EF5, 2012 EC, 2012 DJ61, 2012 DA14, 2012 BN11, 2012 BB124
B18Terskol Obs. in Russia, 1 in MPEC 2012-F62 -- 2012 BA35
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 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 FA14JPL Sentry1605R E M O V E DJPL: Risk listing removed at 0931 UTC.
NEODyS1605R E M O V E D-
2012 FQ1JPL Sentry16052025-2084124.5e-07-3.08-3.310JPL: "Analysis based on 30 observations spanning 7.0845 days (2012-Mar-16.16837 to 2012-Mar-23.25292)." Diameter approximately 0.514 km. from mean, weighted H=19.1.
NEODyS16052025-203433.01e-07-3.27-3.420NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2012-03-16.169 to 2012-03-23.254."
2012 ES10JPL Sentry16052053-2076121.8e-06-4.80-5.250JPL: "Analysis based on 28 observations spanning 8.0431 days (2012-Mar-15.36929 to 2012-Mar-23.41243)." Diameter approximately 0.061 km. from mean, weighted H=23.7.
2012 EP10JPL Sentry16052056-2112371.0e-04-6.47-6.790JPL: "Analysis based on 24 observations spanning 7.0927 days (2012-Mar-15.27159 to 2012-Mar-22.36427)." Diameter approximately 0.005 km. from mean, weighted H=29.2.
2012 EG5JPL Sentry1605R E M O V E DJPL: Risk listing removed at 0853 UTC.
2012 ECJPL Sentry16052083-209932.3e-06-5.38-5.620JPL: "Analysis based on 83 observations spanning 22.853 days (2012-Mar-01.3419 to 2012-Mar-24.19505)." Diameter approximately 0.066 km. from mean, weighted H=23.5.
NEODyS16052075-209031.54e-06-5.52-5.70NEODyS: "Based on 83 optical observations (of which 0 are rejected as outliers) from 2012-03-01.343 to 2012-03-24.196."
2012 DA14JPL Sentry16052020-2042259.4e-05-3.39-3.760JPL: "Analysis based on 159 observations spanning 29.445 days (2012-Feb-23.03431 to 2012-Mar-23.47924)." Diameter approximately 0.045 km. from mean, weighted H=24.4.
NEODyS16052020-20902764.71e-04-3.01-3.730NEODyS: "Based on 162 optical observations (of which 4 are rejected as outliers) from 2012-02-23.029 to 2012-03-23.480."

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 24 March '12

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

1721Updated Traffic Report
1605Noted 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 removed 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 removed 2012 FA14 as an impact risk - see above
Noted that NEODyS has removed 2012 FA14 as an impact risk - 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-F62 - Daily Orbit Update - see above
Grabbed MPEC 2012-F63 - 2012 FS23 - see above
Grabbed MPEC 2012-F64 - 2012 FT23 - see above
Grabbed MPEC 2012-F65 - 2012 FU23 - see above
Grabbed MPEC 2012-F66 - 2012 FV23 - see above
Grabbed MPEC 2012-F67 - 2012 FW23 - see above
Grabbed MPEC 2012-F68 - 2012 FX23 - see above
Grabbed MPEC 2012-F69 - 2012 FY23 - see above
Grabbed MPEC 2012-F70 - 2012 FZ23 - see above
0204Grabbed MPEC 2012-F61 - 2011 SY120 - see above
0107Grabbed MPEC 2012-F60 - 2012 FD23 - see above