Contents  on 27 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 27 March '12

Eight objects reported inside ten LD

There are eight visitors reported passing within ten lunar distances (LD) of our planet today. Intruder 2012 FS35 exits the Earth-Moon system, moving from 0.31 to 1.10 LD. 2012 FT35 is inside Earth's Hill sphere, traveling from 2.86 to 3.67 LD, and intruder 2012 FP35 exits Earth's Hill sphere, outbound from 2.43 to 5.56 LD. Further away, 2012 FX35 is headed out from from 5.37 to 6.38 LD, 2012 FM35 from 6.25 to 6.85 LD, and 2012 FU23 from 5.48 to 9.19 LD. 2012 FV23 is inbound from 8.01 to 7.32 LD and intruder 2012 EG5 (risk-listed radar target) comes inside ten LD, moving from 10.17 to 8.30 LD.

Headed our way next, 2012 FW35 arrives inside ten LD on March 30th and 2007 HV4 on April 14th.

This report was posted at 1622 UTC with follow-up in today's DOU MPEC for 2012 FX35, 2012 FT35, 2012 FS35, 2012 FM35, 2012 FV23, and 2012 EG5, as well as the recovery of 2012 EN10.


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. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 27 March '12

The MPC's NEO Confirmation Page has 15 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had fifteen objects listed. Of these, nine were "one nighters." So far The Tracking News has counted a total of 27 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 27 March '12

Minor Planet Electronic Circulars

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


MPEC 2012-F94 - "22:21 UT" - 2012 FZ44


<< DOU on 27 Mar. '12 >>  MPEC 2012-F93 - "06:03 UT" - Daily Orbit Update


MPEC 2012-F92 - "01:07 UT" - 2012 FH38

Observers  on 27 March '12

A total of 38 observers appear in today's MPECs.

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 1 in MPEC 2012-F93 -- 2012 AA11
H21Astronomical Research Obs. Westfield in Illinois, 19 in MPECs 2012-F92, 2012-F93 & 2012-F94 -- 2012 FZ44, 2012 FZ23, 2012 FT35, 2012 FS35, 2012 FS23, 2012 FQ35, 2012 FN35, 2012 FM35, 2012 FL35, 2012 FJ, 2012 FH38, 2012 ES3, 2012 EN10, 2012 EA2, 2012 DT60, 2012 DT32, 2012 BB2, 2011 YW1, 2008 AN33
C93Bellavista Obs. in Italy, 1 in MPEC 2012-F93 -- 2012 EG5
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2012-F93 -- 2012 DG31
C77Bernezzo Obs. in Italy, 1 in MPEC 2012-F93 -- 3352
B75Betelgeuse Station in Italy, 2 in MPEC 2012-F93 -- 2012 DX75, 2012 AA11
B88Bigmuskie Obs. in Italy, 1 in MPEC 2012-F93 -- 1862
493Calar Alto Obs. in Spain, 1 in MPEC 2012-F93 -- 4688
160Castelmartini Obs. in Italy, 4 in MPEC 2012-F93 -- 2012 BJ134, 2012 AA11, 2011 XO3, 141018
703Catalina Sky Survey (CSS) in Arizona, 4 in MPECs 2012-F92 & 2012-F93 -- 2012 FH38, 2008 JZ30, 36183, 138095
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPEC 2012-F93 -- 2012 FY23, 2012 FS23, 2012 FL35, 2012 FD23
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2012-F93 -- 2004 FG11
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 4 in MPEC 2012-F93 -- 2012 FZ23, 2012 FQ35, 2012 AA11, 2011 YV15
151Eschenberg Obs. in Switzerland, 2 in MPEC 2012-F93 -- 2012 EG5, 2004 QJ7
C76Estels Obs., 1 in MPEC 2012-F93 -- 2012 EK8
203GiaGa Obs. in Italy, 3 in MPECs 2012-F92 & 2012-F93 -- 2012 FH38, 2012 EG5, 267221
J95Great Shefford Obs. in England, 4 in MPECs 2012-F92 & 2012-F93 -- 2012 FZ23, 2012 FT35, 2012 FM35, 2012 FH38
A17Guidestar Obs. in Germany, 5 in MPEC 2012-F93 -- 2012 FR35, 2012 FJ, 2012 EG5, 53110, 306595
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2012-F93 -- 2012 DX75, 2012 AA11, 2011 YV15
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2012-F93 -- 2012 FZ23
246KLENOT in the Czech Republic, 3 in MPECs 2012-F92 & 2012-F93 -- 2012 FM35, 2012 FH38, 2012 DX75
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2012-F93 & 2012-F94 -- 2012 FZ44, 2012 EQ10
A13Naef Obs. in Switzerland, 1 in MPEC 2012-F93 -- 16912
A24New Millennium Obs. in Italy, 7 in MPECs 2012-F92 & 2012-F93 -- 2012 FH38, 2012 BJ134, 89959, 21088, 6455, 1627, 1620
J69North Obs. in England, 3 in MPEC 2012-F93 -- 2012 FZ23, 2012 FX35, 2012 FQ35
H23Pear Tree Obs. in Florida, 1 in MPEC 2012-F93 -- 2012 EG5
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 7 in MPEC 2012-F93 -- 2012 FZ23, 2012 EG5, 2012 AA11, 2011 QD48, 89959, 163243, 143651
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-F93 -- 2012 FY13
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2012-F94 -- 2012 FZ44
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2012-F92 & 2012-F94 -- 2012 FZ44, 2012 FH38
233San Vito Obs. in Italy, 1 in MPEC 2012-F93 -- 2012 AA11
204Schiaparelli Obs. in Italy, 6 in MPECs 2012-F92, 2012-F93 & 2012-F94 -- 2012 FZ44, 2012 FX35, 2012 FV23, 2012 FS23, 2012 FM35, 2012 FH38
E12Siding Spring Survey in New South Wales, 1 in MPEC 2012-F93 -- 2012 FZ23
510Siegen Obs. in Germany, 1 in MPEC 2012-F93 -- 2012 FX35
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2012-F93 -- 2012 DV43
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2012-F92 -- 2012 FH38
C44Volta Obs. in Italy, 1 in MPEC 2012-F92 -- 2012 FH38
I15Wishing Star Obs. in Rhode Island, 5 in MPEC 2012-F93 -- 2012 AA11, 89959, 32906, 24475, 141018
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 27 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 FT35JPL Sentry1621R E M O V E DJPL: Risk listing removed at 0902 UTC.
2012 FN35JPL Sentry1621R E M O V E DJPL: Risk listing removed at 0854 UTC.
2012 EG5JPL Sentry1621210713.6e-07-6.49-6.490JPL: "Analysis based on 185 observations spanning 13.859 days (2012-Mar-13.30201 to 2012-Mar-27.16068)." Diameter approximately 0.047 km. from mean, weighted H=24.3.

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 27 March '12

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

2314Grabbed MPEC 2012-F94 - 2012 FZ44 - see above
1622Posted Traffic Report
1621Noted that JPL Sentry has updated its 2012 EG5 risk assessment - see above
Noted that JPL Sentry has removed 2012 FN35 as an impact risk - see above
Noted that JPL Sentry has removed 2012 FT35 as an impact risk - see above
Grabbed MPEC 2012-F93 - Daily Orbit Update - see above
0207Grabbed MPEC 2012-F92 - 2012 FH38 - see above