Contents  on 4 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 4 May '13

One object reported inside ten LD

There is one visitor reported to be inside ten lunar distances (LD) of Earth today. 2013 GH66 leaves our ten-LD reporting "bubble," traveling from 9.65 to 10.05 LD. No other objects are known to come this close until late July.

This report was generated at 1612 UTC with new discovery 2013 JF1 (MPEC), which was barely inside ten LD during 28-30 April, and follow-up in today's DOU MPEC for PMD candidate 2013 GH66, adding 11.165 days to its previous 14.826-day observing arc.



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 4 May '13

The MPC's NEO Confirmation Page has 6 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had six objects listed. Of these, three were "one nighters." So far The Tracking News has counted a total of 28 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 4 May '13

Minor Planet Electronic Circulars

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


MPEC 2013-J17 - "20:52 UT" - 2013 JY2


MPEC 2013-J16 - "20:48 UT" - 2013 JX2


<< DOU on 4 May '13 >>  MPEC 2013-J15 - "06:04 UT" - Daily Orbit Update


MPEC 2013-J14 - "03:57 UT" - P/2007 H1 = 2013 J1 (McNaught)


MPEC 2013-J13 - "01:58 UT" - 2013 JF1


MPEC 2013-J12 - "01:54 UT" - 2013 JE1

Observers  on 4 May '13

A total of 36 observers appear in today's MPECs.

CodeObserver / observatory
C77Bernezzo Obs. in Italy, 1 in MPEC 2013-J15 -- 2013 GR38
300Bisei Spaceguard Center in Japan, 3 in MPECs 2013-J15, 2013-J16 & 2013-J17 -- 2013 JY2, 2013 JX2, 2009 SQ104
703Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2013-J13, 2013-J15 & 2013-J17 -- 2013 JY2, 2013 JF1, 2013 HO11, 2013 HN11, 2012 XF55, 2010 GY6, 2009 SC15, 2008 GB110, 2002 GS, 357005, 242643
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPEC 2013-J15 -- 2013 GR66, 2013 GJ35
G58Chabot Obs. in northern California, 3 in MPECs 2013-J12, 2013-J13 & 2013-J16 -- 2013 JX2, 2013 JF1, 2013 JE1
448Desert Moon Obs. in New Mexico, 5 in MPEC 2013-J15 -- 2013 HT15, 2011 BK24, 2006 HB, 2005 QC, 350513
006Fabra Obs. in Spain, 1 in MPEC 2013-J15 -- 242643
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2013-J13 -- 2013 JF1
203GiaGa Obs. in Italy, 4 in MPECs 2013-J13, 2013-J15 & 2013-J16 -- 2013 JX2, 2013 JF1, 2013 FY13, 359592
J95Great Shefford Obs. in England, 3 in MPECs 2013-J12, 2013-J13 & 2013-J16 -- 2013 JX2, 2013 JF1, 2013 JE1
704LINEAR in New Mexico, 1 in MPEC 2013-J15 -- 137199
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2013-J12, 2013-J13, 2013-J15, 2013-J16 & 2013-J17 -- 2013 JY2, 2013 JX2, 2013 JF1, 2013 JE1, 2013 GH66
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-J15 -- 2000 EU70
C91Montevenere Obs., 2 in MPEC 2013-J15 -- 2009 SQ104, 5645
900Moriyama Obs. in Japan, 3 in MPECs 2013-J13, 2013-J15 & 2013-J17 -- 2013 JY2, 2013 JF1, 2009 SQ104
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2013-J15 & 2013-J17 -- 2013 JY2, 89958, 356285, 206910, 11054
0892Oleksandr V. Shulga via Nikolaev Obs. in the Ukraine, 4 in MPEC 2013-J15 -- 2009 SQ104, 2009 BL2, 360191, 359592
I41Palomar Transient Factory in southern California, 1 in MPEC 2013-J12 -- 2013 JE1
F51Pan-STARRS 1 (PS1) in Hawaii, 17 in MPECs 2013-J15 & 2013-J16 -- 2013 JX2, 2013 GV68, 2013 GN3, 2012 TF53, 2010 KR10, 2008 JP14, 2008 HB38, 2006 GX2, 65803, 350462, 217430, 164214, 164201, 141874, 137126, 6050, 3757
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2013-J15 -- 210012
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2013-J17 -- 2013 JY2
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2013-J17 -- 2013 JY2
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-J13 -- 2013 JF1
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2013-J16 -- 2013 JX2
204Schiaparelli Obs. in Italy, 2 in MPECs 2013-J16 & 2013-J17 -- 2013 JY2, 2013 JX2
E12Siding Spring Survey in New South Wales, 1 in MPEC 2013-J17 -- 2013 JY2
G401program code 1 via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2013-J15 -- 359592
J84South Obs. in England, 1 in MPEC 2013-J13 -- 2013 JF1
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2013-J15 -- 2013 GV68
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2013-J14 & 2013-J15 -- P/2013 J1, 2013 GL8
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2013-J13 & 2013-J16 -- 2013 JX2, 2013 JF1
I52Steward Obs. Mt. Lemmon Station in Arizona, 1 in MPEC 2013-J13 -- 2013 JF1
I76Tesla Obs. in Spain, 3 in MPEC 2013-J15 -- 2013 HT15, 2013 EU9, 2009 SQ104
C75Whitestar Obs., 1 in MPEC 2013-J15 -- 8176
I15Wishing Star Obs. in Rhode Island, 2 in MPEC 2013-J15 -- 2013 GE84, 137170
Q622program code 2 via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-J17 -- 2013 JY2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 4 May '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 JE1NEODyS15202020-2110927.8e-09-4.35-4.980NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2013-04-30.346 to 2013-05-03.267."
JPL Sentry05152020-209571.1e-09-4.92-5.210JPL: "Analysis based on 15 observations spanning 2.9206 days (2013-Apr-30.3455 to 2013-May-03.26613)." Diameter approximately 0.675 km. from mean, weighted H=18.5.

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 4 May '13

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

2131Grabbed MPEC 2013-J16 - 2013 JX2 - see above
Grabbed MPEC 2013-J17 - 2013 JY2 - see above
1612Generated Traffic Report
1520Noted that NEODyS has posted 2013 JE1 as an impact risk - see above
Grabbed MPEC 2013-J15 - Daily Orbit Update - see above
0515Noted that JPL Sentry has posted 2013 JE1 as an impact risk - see above
Grabbed MPEC 2013-J14 - P/2007 H1 = 2013 J1 (McNaught) - see above
0212Grabbed MPEC 2013-J12 - 2013 JE1 - see above
Grabbed MPEC 2013-J13 - 2013 JF1 - see above