Contents  on 18 January '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 18 January '13

Two objects reported inside ten LD

Two objects are reported to be within ten lunar distances (LD) of our planet today. 2013 AP72 exits Earth's Hill sphere, traveling from 3.39 to 5.12 LD. Further away, newly discovered 2013 BT15 is inbound from 6.54 to 5.53 LD.

2013 AT72 arrives inside ten LD tomorrow, newly announced 2013 BV15 is calculated with great uncertainty to arrive on February 6th, and intruder 2012 DA14, a risk-listed radar target, comes in on February 8th.

This report was updated at 2358 UTC with new discoveries 2013 BV15 (MPEC) and 2013 BT15 (MPEC). Today's first traffic report was generated at 1624 UTC with follow-up in today's DOU MPEC for 2013 AT72 and departed 2013 AT27.


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 18 January '13

The Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) was not checked on this day.

New MPECs  on 18 January '13

Minor Planet Electronic Circulars

There were twelve MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2013-B29 - "21:53 UT" - 2013 BW15


MPEC 2013-B28 - "21:50 UT" - 2013 BV15


MPEC 2013-B27 - "21:47 UT" - 2013 BU15


MPEC 2013-B26 - "21:44 UT" - 2013 BT15


MPEC 2013-B25 - "21:41 UT" - 2013 BS15


MPEC 2013-B24 - "21:39 UT" - 2013 BR15


MPEC 2013-B23 - "21:36 UT" - 2013 BQ15


MPEC 2013-B22 - "21:32 UT" - 2013 BP15


MPEC 2013-B21 - "18:09 UT" - 2013 AS105


MPEC 2013-B20 - "18:03 UT" - 2009 HB82


<< DOU on 18 Jan. '13 >>  MPEC 2013-B19 - "06:04 UT" - Daily Orbit Update


MPEC 2013-B18 - "05:07 UT" - P/2005 YQ127 = 2013 A3 (LINEAR)

Observers  on 18 January '13

A total of 26 observers appeared in this day's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 4 in MPECs 2013-B20, 2013-B21, 2013-B27 & 2013-B28 -- 2013 BV15, 2013 BU15, 2013 AS105, 2009 HB82
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2013-B19 -- 2012 XF112
C77Bernezzo Obs. in Italy, 2 in MPEC 2013-B19 -- 2013 AT72, 137199
726Brainerd Obs. in Minnesota, 1 in MPEC 2013-B19 -- 2010 BB
703Catalina Sky Survey (CSS) in Arizona, 8 in MPEC 2013-B19 -- 2012 YQ3, 277127, 262623, 25916, 249886, 141354, 11066, 2062
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2013-B19 -- 2009 BE77
448Desert Moon Obs. in New Mexico, 5 in MPEC 2013-B19 -- 2013 AW60, 2013 AW52, 2013 AT76, 277039, 276397
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2013-B21 -- 2013 AS105
F65$Ernesto Guido in Italy via Faulkes Telescope North in Hawaii, 1 in MPEC 2013-B21 -- 2013 AS105
C18Frasnes-Lez-Anvaing Obs. in Belgium, 1 in MPEC 2013-B19 -- 2012 XF112
695]Mark Trueblood via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2013-B19 -- 2012 XS111
C41MASTER-II Obs. Kislovodsk in Russia, 1 in MPEC 2013-B19 -- 333284
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2013-B22 & 2013-B27 -- 2013 BU15, 2013 BP15
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPECs 2013-B23 & 2013-B25 -- 2013 BS15, 2013 BQ15
711McDonald Obs. in Texas, 1 in MPEC 2013-B21 -- 2013 AS105
G84Mt. Lemmon SkyCenter in Arizona, 1 in MPEC 2013-B21 -- 2013 AS105
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2013-B19 & 2013-B26 -- 2013 BT15, 2001 YM2, 323300, 198752, 177016
F51Pan-STARRS 1 (PS1) in Hawaii, 13 in MPECs 2013-B19, 2013-B22, 2013-B23, 2013-B24, 2013-B25, 2013-B28 & 2013-B29 -- 2013 BW15, 2013 BV15, 2013 BS15, 2013 BR15, 2013 BQ15, 2013 BP15, 2010 QD2, 2009 BL2, 349219, 185851, 164216, 163697, 137925
D29Purple Mtn. Obs. Xuyi Station in China, 2 in MPEC 2013-B19 -- 4486, 1916
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 2 in MPEC 2013-B19 -- 2013 BW2, 2013 BU2
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-B19 -- 2013 AS27
204Schiaparelli Obs. in Italy, 26 in MPEC 2013-B19 -- 2012 YO3, 2012 YO1, 2012 YN6, 2012 XS93, 2012 XH55, 2012 XF112, 2012 XE17, 2012 XC112, 2012 WB25, 2012 VA5, 2012 US136, 2012 TJ146, 2012 TA219, 2012 SA59, 2012 QF49, 2012 PQ28, 2011 WS2, 2010 QD2, 2010 BB, 2009 SC15, 2008 XE2, 2004 YC5, 2002 TR190, 2002 AY1, 2000 WL63, 2000 QY69
691Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2013-B19, 2013-B21 & 2013-B27 -- 2013 BU15, 2013 AS105, 2012 XF17, 2006 OF15, 2001 XP88, 190161
291Spacewatch 1.8m telescope in Arizona, 16 in MPECs 2013-B18, 2013-B19, 2013-B22, 2013-B24, 2013-B27, 2013-B28 & 2013-B29 -- 2013 BW15, 2013 BV15, 2013 BU15, 2013 BR15, 2013 BP15, 2013 AZ52, 2013 AX52, 2013 AT27, 2013 AF4, 2013 AE69, 2013 AD53, P/2013 A3, 2012 YP3, 2012 XO111, 2012 VC82, 2009 WO106
I42Westport Obs. in Massachusetts, 2 in MPEC 2013-B19 -- 2012 YO3, 2012 YO1
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-B21 -- 2013 AS105
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 18 January '13

Summary Risk Table for Risk Assessments Updated Today
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 BU15JPL Sentry23592026-205682.2e-06-4.11-4.320JPL: "Analysis based on 16 observations spanning 1.1629 days (2013-Jan-17.35051 to 2013-Jan-18.51337)." Diameter approximately 0.091 km. from mean, weighted H=22.9.

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 18 January '13

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

2359Noted that JPL Sentry has posted 2013 BU15 as an impact risk - see above
2358Updated Traffic Report
2217Grabbed MPEC 2013-B22 - 2013 BP15 - see above
Grabbed MPEC 2013-B23 - 2013 BQ15 - see above
Grabbed MPEC 2013-B24 - 2013 BR15 - see above
Grabbed MPEC 2013-B25 - 2013 BS15 - see above
Grabbed MPEC 2013-B26 - 2013 BT15 - see above
Grabbed MPEC 2013-B27 - 2013 BU15 - see above
Grabbed MPEC 2013-B28 - 2013 BV15 - see above
Grabbed MPEC 2013-B29 - 2013 BW15 - see above
1837Grabbed MPEC 2013-B21 - 2013 AS105 - see above
1808Grabbed MPEC 2013-B20 - 2009 HB82 - see above
1619Grabbed MPEC 2013-B19 - Daily Orbit Update - see above
0701Grabbed MPEC 2013-B18 - P/2005 YQ127 = 2013 A3 (LINEAR) - see above