Contents  on 20 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 20 May '13

Five objects reported inside ten LD

There are five objects reported passing within a radius of ten lunar distances (LD) from our home world today. Within Earth's Hill sphere, newly announced 2013 KT1 is inbound from 3.81 to 3.28 LD, while 2013 KA exits Earth's Hill sphere, traveling from 3.52 to 4.50 LD, and 2013 KB enters the sphere, moving from 4.65 to 3.68 LD.

Out further, newly discovered 2013 KS1 is inbound from 7.15 to 5.75 LD and newly announced 2013 KQ1 is outbound from 7.59 to 8.28 LD.

Coming toward Earth next, returning 2009 FE arrives inside ten LD on June 2nd.

This report was updated at 1555 UTC with follow-up in today's DOU MPEC for 2013 KT1, 2013 KQ1, 2009 FE, and departed 2013 JF1. Today's first traffic report was generated at 0408 UTC with new discoveries announced very late yesterday, 2013 KT1 (MPEC), 2013 KS1 (MPEC), and 2013 KQ1 (MPEC).

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 20 May '13

The MPC's NEO Confirmation Page has 4 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four objects listed. Of these, two were "one nighters." So far The Tracking News has counted a total of thirteen 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 20 May '13

Minor Planet Electronic Circulars

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

MPEC 2013-K30 - "21:12 UT" - 2013 KA2

MPEC 2013-K29 - "21:10 UT" - 2013 KB2

MPEC 2013-K28 - "21:07 UT" - 2013 KZ1

MPEC 2013-K27 - "21:05 UT" - 2013 KY1

MPEC 2013-K26 - "19:00 UT" - Comet C/2013 K1 (Christensen)

MPEC 2013-K25 - "18:48 UT" - Comet C/2013 J5 (Boattini)

<< DOU on 20 May '13 >>  MPEC 2013-K24 - "06:05 UT" - Daily Orbit Update

MPEC 2013-K23 - "00:32 UT" - 2013 JB36

Observers  on 20 May '13

A total of 31 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-K28 -- 2013 KZ1
H21Astronomical Research Obs. Westfield in Illinois, 14 in MPECs 2013-K24, 2013-K25 & 2013-K29 -- 2013 KB2, 2013 JX2, 2013 JW17, 2013 JL22, 2013 JE1, 2013 JC, C/2013 J5, 2013 GZ79, 2013 GE84, 2013 FY13, 2013 FD11, 85989, 217796, 137170
703Catalina Sky Survey (CSS) in Arizona, 8 in MPECs 2013-K23, 2013-K24 & 2013-K25 -- 2013 JB36, C/2013 J5, 2009 HB, 2000 WL63, 360433, 357005, 210012, 1981
448Desert Moon Obs. in New Mexico, 6 in MPECs 2013-K24 & 2013-K28 -- 2013 KZ1, 2013 JX2, 2013 JQ22, 2013 JF1, 2013 GU79, 162470
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2013-K23 -- 2013 JB36
Z81Estrella de Mar Obs., 2 in MPEC 2013-K24 -- 357005, 137199
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2013-K23 & 2013-K25 -- 2013 JB36, C/2013 J5
K57Fiore Obs., 1 in MPEC 2013-K23 -- 2013 JB36
J95Great Shefford Obs. in England, 5 in MPECs 2013-K23, 2013-K24, 2013-K25, 2013-K28 & 2013-K29 -- 2013 KZ1, 2013 KT1, 2013 KB2, 2013 JB36, C/2013 J5
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2013-K24 -- 9950
K91LCOGT Sutherland A in South Africa, 4 in MPECs 2013-K24, 2013-K27, 2013-K28 & 2013-K29 -- 2013 KZ1, 2013 KY1, 2013 KR1, 2013 KB2
K93LCOGT Sutherland C in South Africa, 1 in MPEC 2013-K25 -- C/2013 J5
J131National Schools Obs. via the Liverpool Telescope in the Canary Islands, 1 in MPEC 2013-K24 -- 2000 WL63
H01Magdalena Ridge Obs. (MRO) in New Mexico, 6 in MPECs 2013-K23, 2013-K25, 2013-K27, 2013-K28, 2013-K29 & 2013-K30 -- 2013 KZ1, 2013 KY1, 2013 KB2, 2013 KA2, 2013 JB36, C/2013 J5
711McDonald Obs. in Texas, 6 in MPECs 2013-K23, 2013-K25, 2013-K26, 2013-K28, 2013-K29 & 2013-K30 -- 2013 KZ1, 2013 KB2, 2013 KA2, C/2013 K1, 2013 JB36, C/2013 J5
G84Mt. Lemmon SkyCenter in Arizona, 1 in MPEC 2013-K23 -- 2013 JB36
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2013-K24, 2013-K25, 2013-K26, 2013-K28, 2013-K29 & 2013-K30 -- 2013 KZ1, 2013 KB2, 2013 KA2, C/2013 K1, C/2013 J5, 2013 HN11, 2011 WU95, 265196, 3757
A24New Millennium Obs. in Italy, 7 in MPEC 2013-K24 -- 2009 SC15, 2009 BL2, 2008 SE85, 275974, 214869, 152952, 1864
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2013-K24 -- 7977
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2013-K27 -- 2013 KY1
V05Rusty Mtn. Obs., 1 in MPEC 2013-K26 -- C/2013 K1
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-K25 -- C/2013 J5
033Schwarzschild Obs. in Germany, 2 in MPECs 2013-K23 & 2013-K25 -- 2013 JB36, C/2013 J5
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2013-K24 & 2013-K28 -- 2013 KZ1, 2012 VO76
G401program code 1 via Canary Islands Obs. in the Canary Islands, 1 in MPEC 2013-K24 -- 137199
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2013-K24 -- 3551
291Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2013-K24, 2013-K25, 2013-K29 & 2013-K30 -- 2013 KB2, 2013 KA2, 2013 JU22, 2013 JM14, 2013 JH14, C/2013 J5, 2013 GZ73, 2013 GX79, 2009 FE
I93St. Pardon de Conques Obs. in France, 3 in MPECs 2013-K23 & 2013-K24 -- 2013 KT1, 2013 KQ1, 2013 JB36
926Tenagra II Obs. in Arizona, 1 in MPEC 2013-K24 -- 7350
H78Univ. of Narino Obs. in Colombia, 1 in MPEC 2013-K24 -- 285263
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-K26 -- C/2013 K1
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-K25 -- C/2013 J5
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 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.





Notes for Today's Latest Risk Assessments
2013 JM22JPL Sentry2008R E M O V E DJPL: Risk listing removed at 1955 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 20 May '13

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

2206Grabbed MPEC 2013-K27 - 2013 KY1 - see above
Grabbed MPEC 2013-K28 - 2013 KZ1 - see above
Grabbed MPEC 2013-K29 - 2013 KB2 - see above
Grabbed MPEC 2013-K30 - 2013 KA2 - see above
2008Noted that JPL Sentry has removed 2013 JM22 as an impact risk - see above
1914Grabbed MPEC 2013-K25 - Comet C/2013 J5 (Boattini) - see above
Grabbed MPEC 2013-K26 - Comet C/2013 K1 (Christensen) - see above
1555Updated Traffic Report
1331Grabbed MPEC 2013-K24 - Daily Orbit Update - see above
0047Grabbed MPEC 2013-K23 - 2013 JB36 - see above