Contents  on 7 February '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 7 February '13

Four objects reported inside ten LD

There are four objects reported inside ten lunar distances (LD) of our planet today. 2013 BA74 is outbound from 4.60 to 5.22 LD and risk-listed intruder 2013 CY from 5.85 to 6.43 LD, while radar target 2013 BS45 is inbound from 5.98 to 5.61 LD and newly announced intruder 2013 CY32 exits ten LD, moving from 9.67 to 16.89 LD

Nearing ten LD, radar target 2013 BV15 and intruder 2012 DA14 (risk-listed radar target) both arrive inside ten LD tomorrow, and risk-listed 2007 EO88 arrives inside on March 15th.

This report was generated at 1808 UTC with follow-up in today's DOU MPEC for 2013 CL22, 2013 BA74, 2013 BS45, 2013 BV15, and 2012 DA14, as well as observation of distant 136617 1994 CC, plus the discovery of tiny 2013 CY32 (MPEC), which passed Earth at 0.28 LD on February 5th.



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

NEOCP Activity  on 7 February '13

The MPC's NEO Confirmation Page has 16 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had sixteen objects listed. Of these, six were "one nighters." So far The Tracking News has counted a total of 29 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 7 February '13

Minor Planet Electronic Circulars

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


MPEC 2013-C30 - "15:37 UT" - 2013 CY32


MPEC 2013-C29 - "15:33 UT" - 2013 CX32


MPEC 2013-C28 - "15:28 UT" - 2013 CW32


MPEC 2013-C27 - "15:23 UT" - 2013 CV32


<< DOU on 7 Feb. '13 >>  MPEC 2013-C26 - "06:03 UT" - Daily Orbit Update

Observers  on 7 February '13

A total of 26 observers appear in today's MPECs.

CodeObserver / observatory
B17AZT-8 Evpatoria in the Ukraine, 1 in MPEC 2013-C26 -- 99942
H21Astronomical Research Obs. Westfield in Illinois, 9 in MPECs 2013-C26 & 2013-C27 -- 2013 CV32, 2013 BS45, 2013 BF27, 2013 AV60, 2013 AQ60, 2013 AP60, 2013 AE69, 2012 JR17, 2006 SO19
703Catalina Sky Survey (CSS) in Arizona, 17 in MPECs 2013-C26, 2013-C28, 2013-C29 & 2013-C30 -- 2013 CY32, 2013 CX32, 2013 CW32, 2010 GE25, 2009 YG, 85990, 351508, 25916, 249886, 22753, 198752, 177049, 162900, 136793, 10563, 5836, 2062
924Cegep de Trois-Rivieres Obs. in Quebec, 1 in MPEC 2013-C26 -- 2013 BV15
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPEC 2013-C26 -- 2013 BC74, 2013 AQ72, 2012 XC112
958Dax Obs. in France, 1 in MPEC 2013-C28 -- 2013 CW32
448Desert Moon Obs. in New Mexico, 2 in MPEC 2013-C26 -- 2013 BV15, 2011 SD173
639Dresden Obs. in Germany, 2 in MPEC 2013-C26 -- 99942, 11405
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2013-C28 & 2013-C29 -- 2013 CX32, 2013 CW32
157Frasso Sabino Obs. in Italy, 2 in MPEC 2013-C26 -- 2013 AU76, 341816
J95Great Shefford Obs. in England, 4 in MPECs 2013-C26, 2013-C28, 2013-C29 & 2013-C30 -- 2013 CY32, 2013 CX32, 2013 CW32, 2013 CL22
C43Hoyerswerda Obs. in Germany, 2 in MPECs 2013-C26 & 2013-C29 -- 2013 CX32, 2013 BV15
C40Kuban State Univ. Obs. in Russia, 1 in MPEC 2013-C26 -- 99942
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2013-C26 -- 2012 XF55, 2012 VO6
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2013-C27 -- 2013 CV32
711McDonald Obs. in Texas, 1 in MPEC 2013-C26 -- 2013 BP73
474Mt. John Obs. in New Zealand, 8 in MPEC 2013-C26 -- 2013 BV15, 2013 BQ45, 2013 BE19, 2013 BD70, 2013 BA74, 2013 AX52, 2013 AQ27, 2012 DA14
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2013-C26 -- 153349, 137052, 2062
J93Mt. Tuffley Obs. in England, 3 in MPEC 2013-C26 -- 11405, 4179, 1036
F51Pan-STARRS 1 (PS1) in Hawaii, 6 in MPECs 2013-C26 & 2013-C27 -- 2013 CV32, 2010 EW45, 22771, 198752, 7358, 3838
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 7 in MPEC 2013-C26 -- 2013 AU76, 2012 XY6, 2012 XF112, 2012 PQ28, 2010 QD2, 99942, 4179
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-C28 -- 2013 CW32
J84South Obs. in England, 2 in MPEC 2013-C26 -- 2013 CL22, 2013 BV15
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2013-C26 -- 1998 QR15, 350513, 214869
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2013-C26, 2013-C27 & 2013-C30 -- 2013 CY32, 2013 CV32, 2012 YO3, 2012 XF55, 2012 VL6, 2011 KD11, 2009 WO106
954Teide Obs. in the Canary Islands, 2 in MPECs 2013-C28 & 2013-C29 -- 2013 CX32, 2013 CW32
926Tenagra II Obs. in Arizona, 1 in MPEC 2013-C26 -- 136617
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 7 February '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 CL22JPL Sentry1718206434.4e-06-5.29-5.430JPL: "Analysis based on 48 observations spanning 2.0892 days (2013-Feb-05.05792 to 2013-Feb-07.1471)." Diameter approximately 0.039 km. from mean, weighted H=24.7.
NEODyS17182064-206421.3e-06-5.82-5.860NEODyS: "Based on 48 optical observations (of which 1 are rejected as outliers) from 2013-02-05.059 to 2013-02-07.148."
2013 BP73JPL Sentry17182078-2100211.7e-05-2.38-2.700JPL: "Analysis based on 23 observations spanning 14.999 days (2013-Jan-22.24343 to 2013-Feb-06.242427)." Diameter approximately 0.310 km. from mean, weighted H=20.2.
NEODyS17182078-2100181.82e-05-2.36-2.650NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2013-01-22.244 to 2013-02-06.243."
2012 DA14NEODyS17182092-209825.06e-08-7.34-7.380NEODyS: "Based on 203 optical observations (of which 4 are rejected as outliers) from 2012-02-23.029 to 2013-02-06.406."
JPL Sentry1718R E M O V E DJPL: Risk listing removed at 1104 UTC.
2009 FDNEODyS17182185-219661.6e-03-1.85-1.91NEODyS: "Based on 182 optical observations (of which 8 are rejected as outliers) from 2009-02-24.366 to 2010-12-07.317."

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 7 February '13

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

1808Generated Traffic Report
1718Noted that NEODyS has updated its 2009 FD risk assessment - see above
Noted that JPL Sentry has removed 2012 DA14 as an impact risk - see above
Noted that NEODyS has updated its 2012 DA14 risk assessment - see above
Noted that JPL Sentry has updated its 2013 BP73 risk assessment - see above
Noted that NEODyS has updated its 2013 BP73 risk assessment - see above
Noted that JPL Sentry has updated its 2013 CL22 risk assessment - see above
Noted that NEODyS has posted 2013 CL22 as an impact risk - see above
Grabbed MPEC 2013-C26 - Daily Orbit Update - see above
Grabbed MPEC 2013-C27 - 2013 CV32 - see above
Grabbed MPEC 2013-C28 - 2013 CW32 - see above
Grabbed MPEC 2013-C29 - 2013 CX32 - see above
Grabbed MPEC 2013-C30 - 2013 CY32 - see above