Contents  on 28 July '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 28 July '13

One object reported inside ten LD

One asteroid is reported moving within ten lunar distances (LD) of Earth today. 2003 DZ15 comes inside, passing from 11.18 to 9.66 LD.

This report was generated at 1603 UTC with the discoveries of departed 2013 OY3 (MPEC) and risk-listed 2013 NE24 (MPEC), and follow-up in today's DOU MPEC for 2003 DZ15.

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 28 July '13

The MPC's NEO Confirmation Page has 10 listings

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

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.

<< DOU on 28 July '13 >>  MPEC 2013-O58 - "06:01 UT" - Daily Orbit Update

MPEC 2013-O57 - "02:33 UT" - 2013 NE24

MPEC 2013-O56 - "02:28 UT" - 2013 OY3

Observers  on 28 July '13

A total of 28 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-O56 -- 2013 OY3
H21Astronomical Research Obs. Westfield in Illinois, 26 in MPEC 2013-O58 -- 2013 OV2, 2013 OG, 2013 OF, 2013 NW, 2013 NT11, 2013 NP11, 2013 NH10, 2013 NC15, 2013 NA15, 2013 MY6, 2013 MR6, 2013 LW28, 2010 LG14, 2004 FE5, 89959, 365071, 359592, 354952, 277830, 274855, 271480, 153349, 11405, 7888, 3752, 1866
I74Baxter Garden Obs. in England, 2 in MPEC 2013-O58 -- 2013 OG, 5879
C77Bernezzo Obs. in Italy, 1 in MPEC 2013-O58 -- 17188
470Ceccano Obs. in Italy, 1 in MPEC 2013-O58 -- 2003 DZ15
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPEC 2013-O58 -- 2013 NT11, 2013 NP11
K20Danastro Obs., 1 in MPEC 2013-O58 -- 137170
I19El Gato Gris Obs. in Argentina, 1 in MPEC 2013-O56 -- 2013 OY3
151Eschenberg Obs. in Switzerland, 3 in MPEC 2013-O58 -- 2010 TN54, 2003 OB4, 2003 DZ15
J95Great Shefford Obs. in England, 1 in MPEC 2013-O58 -- 2013 OF
W86LCOGT Cerro Tololo B in Chile, 1 in MPEC 2013-O56 -- 2013 OY3
K93LCOGT Sutherland C in South Africa, 1 in MPEC 2013-O58 -- 232691
950.Ovidiu Vaduvescu via La Palma in the Canary Islands, 1 in MPEC 2013-O58 -- 2013 MR
K38M57 Obs., 1 in MPEC 2013-O58 -- 2010 LG14
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2013-O57 -- 2013 NE24
J93Mt. Tuffley Obs. in England, 1 in MPEC 2013-O58 -- 153349
A13Naef Obs. in Switzerland, 1 in MPEC 2013-O58 -- 351331
C23Olmen Obs. in Belgium, 3 in MPEC 2013-O58 -- 2003 DZ15, 285263, 153349
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2013-O58 -- 271480
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2013-O57 & 2013-O58 -- 2013 NE24, 88263
A32Panker Obs. in Germany, 1 in MPEC 2013-O58 -- 285263
H36Sandlot Obs. in Kansas, 4 in MPEC 2013-O58 -- 2013 OF, 2013 NV, 2013 NP11, 140039
E12Siding Spring Survey (SSS) in New South Wales, 7 in MPECs 2013-O56 & 2013-O58 -- 2013 OY3, 2013 NV, 2013 NT11, 2013 NP8, 2013 NK4, 2013 KR1, 86829
J84South Obs. in England, 1 in MPEC 2013-O58 -- 2003 DZ15
291Spacewatch 1.8m telescope in Arizona, 7 in MPEC 2013-O58 -- 2013 OG, 2013 OF, 2013 NP11, 2013 NH10, 2013 NF19, 2013 LH25, 2010 NZ1
C36Starry Wanderer Obs. in Belarus, 1 in MPEC 2013-O58 -- 2003 DZ15
G56Walnut Creek Obs. in northern California, 2 in MPEC 2013-O58 -- 2013 OG, 2003 DZ15
Q62!program code "!" (10) via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-O58 -- 2010 AF30
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-O56 -- 2013 OY3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 July '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.





Notes for Today's Latest Risk Assessments
2013 NE24NEODyS14432051-2112166.27e-06-6.57-6.850NEODyS: "Based on 6 optical observations (of which 0 are rejected as outliers) from 2013-07-14.491 to 2013-07-15.496."
JPL Sentry04442051-2112166.1e-06-6.57-6.890JPL: "Analysis based on 6 observations spanning 1.0048 days (2013-Jul-14.49054 to 2013-Jul-15.495357)." Diameter approximately 0.011 km. from mean, weighted H=27.4.

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 28 July '13

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

1603Generated Traffic Report
1443Noted that NEODyS has posted 2013 NE24 as an impact risk - see above
Grabbed MPEC 2013-O58 - Daily Orbit Update - see above
0444Noted that JPL Sentry has posted 2013 NE24 as an impact risk - see above
Grabbed MPEC 2013-O56 - 2013 OY3 - see above
Grabbed MPEC 2013-O57 - 2013 NE24 - see above