Contents  on 13 May '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 13 May '13

No objects reported inside ten LD

On this day there are no asteroids known to be traveling within ten lunar distances (LD) of our planet. Coming along next, newly announced risk-listed 2013 JM22 arrives inside ten LD on May 15th and returning 2009 FE arrives on June 2nd.

This report was updated at 2052 UTC with new discovery 2013 JM22 (MPEC). Today's first traffic report was generated at 1427 UTC with follow-up in today's DOU MPEC for 2009 FE and departed 2013 JF1, and observation of distant 68216 2001 CV26.

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.

Radar Astrometry  on 13 May '13

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:

Data update noted at 2201 UTC when the database was dated 13 May

NEOCP Activity  on 13 May '13

The MPC's NEO Confirmation Page has 49 listings

When last checked at 2318 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 49 objects listed. Of these, 20 were "one nighters." So far The Tracking News has counted a total of 59 listings on the NEOCP today.

New MPECs  on 13 May '13

Minor Planet Electronic Circulars

As of last check at 2318 UTC, there have been nine MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2013-J59 - "18:12 UT" - 2013 JM22

MPEC 2013-J58 - "18:09 UT" - 2013 JL22

MPEC 2013-J57 - "18:05 UT" - 2013 JK22

MPEC 2013-J56 - "18:02 UT" - 2013 JJ22

MPEC 2013-J55 - "17:58 UT" - 2013 JH22

MPEC 2013-J54 - "17:54 UT" - 2013 JG22

<< DOU on 13 May '13 >>  MPEC 2013-J53 - "06:04 UT" - Daily Orbit Update

MPEC 2013-J52 - "04:23 UT" - Comet P/2013 EW90 (Tenagra)

MPEC 2013-J51 - "03:08 UT" - Comet P/2013 J4 (Panstarrs)

Observers  on 13 May '13

A total of 35 observers appear in today's MPECs.

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 1 in MPEC 2013-J53 -- 8176
E23Arcadia Obs. in New South Wales, 2 in MPECs 2013-J57 & 2013-J58 -- 2013 JL22, 2013 JK22
251Arecibo in Puerto Rico, 1 in radar -- 360191
H21Astronomical Research Obs. Westfield in Illinois, 16 in MPECs 2013-J53, 2013-J55 & 2013-J56 -- 2013 JX2, 2013 JU17, 2013 JO4, 2013 JJ22, 2013 JH22, 2013 JH14, 2013 JF1, 2013 JE1, 2013 HO11, 2013 HG19, 2013 GZ79, 2013 GU79, 2013 GE84, 2012 TV78, 68216, 217796
C77Bernezzo Obs. in Italy, 2 in MPECs 2013-J58 & 2013-J59 -- 2013 JM22, 2013 JL22
300Bisei Spaceguard Center in Japan, 3 in MPECs 2013-J57, 2013-J58 & 2013-J59 -- 2013 JM22, 2013 JL22, 2013 JK22
703Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2013-J52, 2013-J53, 2013-J58 & 2013-J59 -- 2013 JM22, 2013 JL22, P/2013 EW90, 2009 HB, 68216, 350462, 163249, 161998, 141670, 5332
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPECs 2013-J53 & 2013-J57 -- 2013 JK22, 2013 HG20, 2013 ES89
I39Cruz del Sur Obs. in Argentina, 2 in MPECs 2013-J57 & 2013-J58 -- 2013 JL22, 2013 JK22
448Desert Moon Obs. in New Mexico, 2 in MPECs 2013-J58 & 2013-J59 -- 2013 JM22, 2013 JL22
Z81Estrella de Mar Obs., 2 in MPEC 2013-J53 -- 2013 HP11, 141765
F657Paul Roche in Wales via Faulkes Telescope North in Hawaii, 1 in MPEC 2013-J52 -- P/2013 EW90
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 360191
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2013-J53 -- 141670
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-J54 -- 2013 JG22
568_Marco Micheli on Mauna Kea in Hawaii, 6 in MPECs 2013-J51, 2013-J53, 2013-J55 & 2013-J56 -- 2013 JS7, 2013 JS17, 2013 JK14, 2013 JJ22, 2013 JH22, P/2013 J4
932McCarthy Obs. in Connecticut, 2 in MPECs 2013-J57 & 2013-J59 -- 2013 JM22, 2013 JK22
711McDonald Obs. in Texas, 1 in MPEC 2013-J52 -- P/2013 EW90
900Moriyama Obs. in Japan, 1 in MPEC 2013-J58 -- 2013 JL22
474Mt. John Obs. in New Zealand, 1 in MPEC 2013-J53 -- 2013 GH
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2013-J51, 2013-J52 & 2013-J53 -- P/2013 J4, P/2013 EW90, 141531, 137911, 137126, 4486
I41Palomar Transient Factory in southern California, 1 in MPEC 2013-J52 -- P/2013 EW90
F51Pan-STARRS 1 (PS1) in Hawaii, 9 in MPECs 2013-J51, 2013-J53, 2013-J54, 2013-J55 & 2013-J56 -- 2013 JJ22, 2013 JH22, 2013 JG22, P/2013 J4, 2007 WQ3, 2005 QC, 164206, 3551, 2202
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2013-J52 -- P/2013 EW90
C95SATINO-1 in France, 1 in MPEC 2013-J57 -- 2013 JK22
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2013-J57, 2013-J58 & 2013-J59 -- 2013 JM22, 2013 JL22, 2013 JK22
H36Sandlot Obs. in Kansas, 2 in MPECs 2013-J58 & 2013-J59 -- 2013 JM22, 2013 JL22
204Schiaparelli Obs. in Italy, 1 in MPEC 2013-J52 -- P/2013 EW90
033Schwarzschild Obs. in Germany, 3 in MPECs 2013-J53 & 2013-J57 -- 2013 JW17, 2013 JU17, 2013 JK22
E12Siding Spring Survey in New South Wales, 1 in MPEC 2013-J57 -- 2013 JK22
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2013-J52 & 2013-J53 -- P/2013 EW90, 265196
291Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2013-J51, 2013-J53, 2013-J54 & 2013-J56 -- 2013 JS7, 2013 JN7, 2013 JM7, 2013 JJ22, 2013 JG22, P/2013 J4, 2013 HV14, 2013 GY7, 2013 GD34, 2009 FE
I93St. Pardon de Conques Obs. in France, 4 in MPECs 2013-J53, 2013-J57, 2013-J58 & 2013-J59 -- 2013 JM22, 2013 JL22, 2013 JK22, 2008 OX2
926Tenagra II Obs. in Arizona, 2 in MPECs 2013-J52 & 2013-J53 -- P/2013 EW90, 141670
I76Tesla Obs. in Spain, 1 in MPEC 2013-J53 -- 2009 SQ104
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 2 in MPECs 2013-J51 & 2013-J52 -- P/2013 J4, P/2013 EW90
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 May '13

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2318 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.





Notes for Today's Latest Risk Assessments
2013 JM22JPL Sentry19552073-209541.1e-06-4.64-4.850JPL: "Analysis based on 31 observations spanning 1.0257 days (2013-May-12.34486 to 2013-May-13.37054)." Diameter approximately 0.088 km. from mean, weighted H=22.9.
2013 JW17JPL Sentry1422210013.8e-08-7.41-7.410JPL: "Analysis based on 18 observations spanning 1.0082 days (2013-May-11.33732 to 2013-May-12.34555)." Diameter approximately 0.041 km. from mean, weighted H=24.6.
2013 JS17NEODyS14232084-210143.89e-08-6.22-6.310NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2013-05-08.441 to 2013-05-12.346."
JPL Sentry14222084-210554.3e-08-6.18-6.240JPL: "Analysis based on 14 observations spanning 3.9047 days (2013-May-08.44002 to 2013-May-12.34475)." Diameter approximately 0.092 km. from mean, weighted H=22.8.
2013 JH14JPL Sentry1422R E M O V E DJPL: Risk listing removed at 0950 UTC.

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 13 May '13

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

2201Noted Radar Astrometry database update - see above
2052Updated Traffic Report
1955Noted that JPL Sentry has posted 2013 JM22 as an impact risk - see above
1829Grabbed MPEC 2013-J56 - 2013 JJ22 - see above
Grabbed MPEC 2013-J57 - 2013 JK22 - see above
Grabbed MPEC 2013-J58 - 2013 JL22 - see above
Grabbed MPEC 2013-J59 - 2013 JM22 - see above
1800Grabbed MPEC 2013-J54 - 2013 JG22 - see above
Grabbed MPEC 2013-J55 - 2013 JH22 - see above
1422Noted that JPL Sentry has removed 2013 JH14 as an impact risk - see above
Noted that JPL Sentry has updated its 2013 JS17 risk assessment - see above
Noted that NEODyS has posted 2013 JS17 as an impact risk - see above
Noted that JPL Sentry has updated its 2013 JW17 risk assessment - see above
Grabbed MPEC 2013-J52 - Comet P/2013 EW90 (Tenagra) - see above
Grabbed MPEC 2013-J53 - Daily Orbit Update - see above
0337Grabbed MPEC 2013-J51 - Comet P/2013 J4 (Panstarrs) - see above