Contents  on 30 December '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 30 December '13

One object reported inside ten LD

There is one asteroid reported to be possibly within a radius of ten lunar distances (LD) from our planet today. 2011 YD29, observation of which hasn't been reported yet, is calculated with great uncertainty to be outbound from 6.4 to 7.1 LD. Headed our way next, 2013 YL2 arrives inside ten LD on January 1st.

This report was generated at 1506 UTC with follow-up in today's DOU MPEC for 2013 YL2.



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 30 December '13

The MPC's NEO Confirmation Page has 38 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 38 objects listed. Of these, 24 were "one nighters." So far The Tracking News has counted a total of 52 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 30 December '13

Minor Planet Electronic Circulars

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


MPEC 2013-Y67 - "19:08 UT" - 1986 NA = 2013 UU3


MPEC 2013-Y66 - "17:31 UT" - 2012 ML6


<< DOU on 30 Dec. '13 >>  MPEC 2013-Y65 - "14:03 UT" - Daily Orbit Update


MPEC 2013-Y64 - "13:32 UT" - 2013 YD38


MPEC 2013-Y63 - "13:09 UT" - 2013 YE38


MPEC 2013-Y62 - "13:03 UT" - 2013 YC38


MPEC 2013-Y61 - "12:58 UT" - 2013 YB38


MPEC 2013-Y60 - "12:53 UT" - 2013 YA38


MPEC 2013-Y59 - "12:47 UT" - 2013 YZ37


MPEC 2013-Y58 - "05:36 UT" - 2011 AR26


MPEC 2013-Y57 - "02:23 UT" - 2011 XS2

Observers  on 30 December '13

A total of 41 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2013-Y59 -- 2013 YZ37
C77Bernezzo Obs. in Italy, 5 in MPECs 2013-Y63, 2013-Y64 & 2013-Y65 -- 2013 YE38, 2013 YD38, 2013 XZ21, 2013 XX8, 2013 WS43
I99Blanquita Obs. in Spain, 3 in MPEC 2013-Y65 -- 2013 XA4, 55532, 361071
Z72Cademuir Obs., 3 in MPECs 2013-Y64 & 2013-Y65 -- 2013 YL2, 2013 YD38, 2013 XA4
703Catalina Sky Survey (CSS) in Arizona, 7 in MPECs 2013-Y63, 2013-Y64 & 2013-Y65 -- 2013 YE38, 2013 YD38, 2013 UH9, 2010 SL13, 2009 WZ104, 68031, 307070
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 11 in MPECs 2013-Y60, 2013-Y61 & 2013-Y65 -- 2013 YY13, 2013 YF, 2013 YC14, 2013 YB38, 2013 YA38, 2013 VV4, 2013 PW6, 2011 SG5, 2007 FK3, 2003 DE6, 141498
958Dax Obs. in France, 5 in MPECs 2013-Y59, 2013-Y61, 2013-Y62, 2013-Y63 & 2013-Y64 -- 2013 YZ37, 2013 YE38, 2013 YD38, 2013 YC38, 2013 YB38
448Desert Moon Obs. in New Mexico, 2 in MPECs 2013-Y59 & 2013-Y61 -- 2013 YZ37, 2013 YB38
J27El Guijo Obs. in Spain, 2 in MPEC 2013-Y65 -- 2013 XA4, 262623
Z81Estrella de Mar Obs., 1 in MPEC 2013-Y65 -- 2013 XF22
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2013-Y59 -- 2013 YZ37
J95Great Shefford Obs. in England, 6 in MPECs 2013-Y59, 2013-Y60, 2013-Y61, 2013-Y62, 2013-Y63 & 2013-Y64 -- 2013 YZ37, 2013 YE38, 2013 YD38, 2013 YC38, 2013 YB38, 2013 YA38
A35Hormersdorf Obs. in Germany, 1 in MPEC 2013-Y65 -- 2013 TB80
C43Hoyerswerda Obs. in Germany, 3 in MPECs 2013-Y59, 2013-Y63 & 2013-Y64 -- 2013 YZ37, 2013 YE38, 2013 YD38
I36Los Campitos Obs. in Argentina, 4 in MPEC 2013-Y65 -- 2013 YS2, 2013 XV8, 2013 XN24, 2013 UH9
C41MASTER-II Obs. Kislovodsk in Russia, 1 in MPEC 2013-Y65 -- 1627
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPEC 2013-Y65 -- 2013 WB44, 2013 QM10, 2013 QL10
711McDonald Obs. in Texas, 1 in MPEC 2013-Y59 -- 2013 YZ37
900Moriyama Obs. in Japan, 1 in MPEC 2013-Y64 -- 2013 YD38
474Mt. John Obs. in New Zealand, 4 in MPECs 2013-Y60, 2013-Y61 & 2013-Y65 -- 2013 YG, 2013 YC14, 2013 YB38, 2013 YA38
G96Mt. Lemmon Survey (MLS) in Arizona, 13 in MPECs 2013-Y59, 2013-Y60, 2013-Y61 & 2013-Y65 -- 2013 YZ37, 2013 YP2, 2013 YB38, 2013 YA38, 2013 MY5, 2008 XP2, 1996 AJ1, 381181, 168378, 16834, 162038, 6456, 6239
A24New Millennium Obs. in Italy, 1 in MPEC 2013-Y64 -- 2013 YD38
G34Oberfrauendorf Obs., 4 in MPEC 2013-Y65 -- 2010 XZ67, 53435, 162566, 2062
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2013-Y65 -- 381677
I41Palomar Transient Factory in southern California, 1 in MPEC 2013-Y65 -- 2005 RQ6
F51Pan-STARRS 1 (PS1) in Hawaii, 7 in MPECs 2013-Y60, 2013-Y61 & 2013-Y65 -- 2013 YB38, 2013 YA38, 2008 VN, 1990 SM, 142563, 141079, 4486
D29Purple Mtn. Obs. Xuyi Station in China, 2 in MPEC 2013-Y65 -- 137099, 1943
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2013-Y59 -- 2013 YZ37
K33San Defendente Obs., 2 in MPECs 2013-Y59 & 2013-Y64 -- 2013 YZ37, 2013 YD38
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2013-Y60 -- 2013 YA38
H36Sandlot Obs. in Kansas, 8 in MPECs 2013-Y59, 2013-Y61, 2013-Y62, 2013-Y63, 2013-Y64 & 2013-Y65 -- 2013 YZ37, 2013 YL2, 2013 YG, 2013 YE38, 2013 YD38, 2013 YC38, 2013 YB38, 2013 XZ20
204Schiaparelli Obs. in Italy, 22 in MPECs 2013-Y60, 2013-Y61, 2013-Y63, 2013-Y64 & 2013-Y65 -- 2013 YE38, 2013 YD38, 2013 YB38, 2013 YA38, 2013 US8, 2013 UR3, 2013 UH9, 2013 UG9, 2013 UC1, 2013 UB1, 2013 TW135, 2013 TS4, 2013 TS135, 2013 TB80, 2013 OM9, 2011 WS2, 2010 VE1, 2009 XZ1, 2009 HB, 2007 XB10, 381906, 380476
033Schwarzschild Obs. in Germany, 7 in MPECs 2013-Y59, 2013-Y61, 2013-Y62, 2013-Y63 & 2013-Y65 -- 2013 YZ37, 2013 YL2, 2013 YE38, 2013 YC38, 2013 YB38, 2013 TV5, 2013 TH5
J84South Obs. in England, 1 in MPEC 2013-Y64 -- 2013 YD38
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2013-Y62 & 2013-Y65 -- 2013 YC38, 155334, 143404
291Spacewatch 1.8m telescope in Arizona, 17 in MPECs 2013-Y59, 2013-Y60, 2013-Y61, 2013-Y62, 2013-Y63, 2013-Y64 & 2013-Y65 -- 2013 YZ37, 2013 YE38, 2013 YD38, 2013 YC38, 2013 YC, 2013 YB38, 2013 YA38, 2013 XY21, 2013 XW3, 2013 XN24, 2013 UP8, 2011 CY46, 2009 KE3, 2008 VN, 2004 CP49, 277616, 215188
926Tenagra II Obs. in Arizona, 18 in MPECs 2013-Y57, 2013-Y58, 2013-Y59, 2013-Y60, 2013-Y61, 2013-Y62, 2013-Y63, 2013-Y64, 2013-Y65 & 2013-Y66 -- 2013 YZ37, 2013 YZ13, 2013 YT2, 2013 YR2, 2013 YP2, 2013 YO2, 2013 YL2, 2013 YE38, 2013 YE, 2013 YD38, 2013 YC38, 2013 YC14, 2013 YB38, 2013 YA38, 2012 ML6, 2011 XS2, 2011 AR26, 177651
C35Terrassa Obs., 2 in MPEC 2013-Y65 -- 2010 XZ67, 52760
I76Tesla Obs. in Spain, 2 in MPEC 2013-Y65 -- 2013 YZ13, 2013 XA4
C44Volta Obs. in Italy, 1 in MPEC 2013-Y59 -- 2013 YZ37
718Wiggins Obs. in Utah, 1 in MPEC 2013-Y65 -- 2013 YZ13
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 30 December '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 YCNEODyS23002037-206821.46e-06-3.47-3.550NEODyS: "Based on 43 optical observations (of which 0 are rejected as outliers) from 2013-12-23.162 to 2013-12-30.228."
JPL Sentry17002037-206821.5e-06-3.45-3.530JPL: "Analysis based on 43 observations spanning 7.0666 days (2013-Dec-23.16077 to 2013-Dec-30.22735)." Diameter approximately 0.189 km. from mean, weighted H=21.3.

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 30 December '13

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

2300Noted that NEODyS has updated its 2013 YC risk assessment - see above
1955Grabbed MPEC 2013-Y67 - 1986 NA = 2013 UU3 - see above
1822Grabbed MPEC 2013-Y66 - 2012 ML6 - see above
1700Noted that JPL Sentry has updated its 2013 YC risk assessment - see above
1506Generated Traffic Report
1504Grabbed MPEC 2013-Y58 - 2011 AR26 - see above
Grabbed MPEC 2013-Y59 - 2013 YZ37 - see above
Grabbed MPEC 2013-Y60 - 2013 YA38 - see above
Grabbed MPEC 2013-Y61 - 2013 YB38 - see above
Grabbed MPEC 2013-Y62 - 2013 YC38 - see above
Grabbed MPEC 2013-Y63 - 2013 YE38 - see above
Grabbed MPEC 2013-Y64 - 2013 YD38 - see above
Grabbed MPEC 2013-Y65 - Daily Orbit Update - see above
0458Grabbed MPEC 2013-Y57 - 2011 XS2 - see above