Contents  on 31 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 31 December '13

One object reported inside ten LD

There is one object reported to be possibly passing within ten lunar distances (LD) of Earth today. Unobserved 2011 YD29 is calculated with much uncertainty to be outbound from 7.1 to 7.9 LD.

Coming to the neighborhood next, 2013 YL2 arrives inside ten LD tomorrow and newly announced 2013 YM48 arrives inside ten LD on January 5th.

This report was generated at 1840 UTC with new discoveries 2013 YM48 (MPEC) and already departed 2013 YJ48 (MPEC), plus follow-up in today's DOU MPEC for 2013 YL2 and departed objects 2013 YQ2, 2013 YD, and radar target 2013 NJ.



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 31 December '13

The MPC's NEO Confirmation Page has 38 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 38 objects listed. Of these, fourteen were "one nighters." So far The Tracking News has counted a total of 51 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 31 December '13

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been fourteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2013-Y82 - "23:06 UT" - 2013 YM70


MPEC 2013-Y81 - "23:01 UT" - 2013 YL70


MPEC 2013-Y80 - "22:55 UT" - 2013 YK70


MPEC 2013-Y79 - "15:03 UT" - 2013 YM48


MPEC 2013-Y78 - "14:58 UT" - 2013 YL48


MPEC 2013-Y77 - "14:52 UT" - 2013 YK48


MPEC 2013-Y76 - "14:46 UT" - 2013 YJ48


MPEC 2013-Y75 - "14:40 UT" - 2013 YH48


MPEC 2013-Y74 - "14:33 UT" - 2013 YG48


MPEC 2013-Y73 - "14:26 UT" - 2013 YF48


<< DOU on 31 Dec. '13 >>  MPEC 2013-Y72 - "14:04 UT" - Daily Orbit Update


MPEC 2013-Y71 - "00:15 UT" - 2013 YE48


MPEC 2013-Y70 - "00:09 UT" - 2013 YD48


MPEC 2013-Y69 - "00:04 UT" - 2013 YC48

Observers  on 31 December '13

A total of 40 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-Y81 -- 2013 YL70
H21Astronomical Research Obs. Westfield in Illinois, 10 in MPEC 2013-Y72 -- 2013 YG, 2013 YF, 2013 YE, 2013 YD, 2013 WT45, 2013 UR3, 2013 TS4, 2013 TH5, 2013 TB80, 2013 QG17
C77Bernezzo Obs. in Italy, 1 in MPEC 2013-Y70 -- 2013 YD48
703Catalina Sky Survey (CSS) in Arizona, 9 in MPECs 2013-Y72, 2013-Y74, 2013-Y77, 2013-Y81 & 2013-Y82 -- 2013 YM70, 2013 YL70, 2013 YK48, 2013 YG48, 2013 WT44, 2013 NJ, 2008 TQ2, 85990, 380636
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 13 in MPECs 2013-Y70, 2013-Y72, 2013-Y74, 2013-Y75, 2013-Y77, 2013-Y81 & 2013-Y82 -- 2013 YZ37, 2013 YM70, 2013 YL70, 2013 YK48, 2013 YH48, 2013 YG48, 2013 YE48, 2013 YD48, 2013 YC14, 2013 YB38, 2013 YA38, 2013 PV13, 2008 EJ1
958Dax Obs. in France, 6 in MPECs 2013-Y69, 2013-Y70, 2013-Y74, 2013-Y77, 2013-Y79 & 2013-Y82 -- 2013 YM70, 2013 YM48, 2013 YK48, 2013 YG48, 2013 YD48, 2013 YC48
448Desert Moon Obs. in New Mexico, 6 in MPECs 2013-Y72 & 2013-Y74 -- 2013 YG48, 2013 YD48, 2002 PC130, 153201, 143409, 137099
113Drebach Obs. in Germany, 2 in MPECs 2013-Y70 & 2013-Y77 -- 2013 YK48, 2013 YD48
639Dresden Obs. in Germany, 1 in MPEC 2013-Y72 -- 2013 TB80
Z81Estrella de Mar Obs., 5 in MPEC 2013-Y72 -- 2013 XV8, 2013 XH4, 2013 XF22, 42286, 10150
J95Great Shefford Obs. in England, 6 in MPECs 2013-Y69, 2013-Y71, 2013-Y72, 2013-Y74, 2013-Y77, 2013-Y79 & 2013-Y80 -- 2013 YM48, 2013 YK70, 2013 YK48, 2013 YG48, 2013 YE48, 2013 YC48
C43Hoyerswerda Obs. in Germany, 3 in MPECs 2013-Y70, 2013-Y72 & 2013-Y77 -- 2013 YK48, 2013 YD48, 2008 CM20
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2013-Y72 -- 55532
246KLENOT in the Czech Republic, 4 in MPECs 2013-Y70, 2013-Y71, 2013-Y72 & 2013-Y77 -- 2013 YK48, 2013 YE48, 2013 YD48, 2013 VD13
046Klet Obs. in the Czech Republic, 1 in MPEC 2013-Y72 -- 294739
130Lumezzane Obs. in Italy, 10 in MPEC 2013-Y72 -- 2013 XZ21, 2013 XX8, 2013 XA4, 2013 WS43, 2009 XZ1, 2002 XS40, 88213, 85182, 380476, 376729
D54MASTER-II Obs. Blagoveshchensk in Russia, 1 in MPEC 2013-Y72 -- 52760
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPEC 2013-Y72 -- 2013 WS44, 2013 TT135, 2013 TE135
900Moriyama Obs. in Japan, 1 in MPEC 2013-Y72 -- 2013 YD38
474Mt. John Obs. in New Zealand, 3 in MPECs 2013-Y72, 2013-Y77 & 2013-Y81 -- 2013 YY13, 2013 YL70, 2013 YK48
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2013-Y71, 2013-Y72, 2013-Y73, 2013-Y76, 2013-Y78, 2013-Y79 & 2013-Y80 -- 2013 YM48, 2013 YL48, 2013 YK70, 2013 YJ48, 2013 YF48, 2013 YE48, 2012 ML6
423North Ryde Obs. in New South Wales, 1 in MPEC 2013-Y72 -- 1980
C23Olmen Obs. in Belgium, 4 in MPEC 2013-Y72 -- 2013 XA4, 2010 XZ67, 2009 XZ1, 251346
J43Oukaimeden Obs. in Morocco, 2 in MPEC 2013-Y72 -- 187040, 7753
F51Pan-STARRS 1 (PS1) in Hawaii, 12 in MPECs 2013-Y70, 2013-Y71, 2013-Y72, 2013-Y73, 2013-Y75 & 2013-Y76 -- 2013 YJ48, 2013 YH48, 2013 YF48, 2013 YE48, 2013 YD48, 2013 XF22, 2013 HO11, 2006 YF, 361071, 279744, 243566, 152742
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 11 in MPEC 2013-Y72 -- 2013 YZ13, 2013 YL2, 2013 XZ21, 2013 XX8, 2013 XH4, 2013 XA4, 2013 TH5, 2011 CQ4, 2010 XZ67, 2010 SL13, 85839
D29Purple Mtn. Obs. Xuyi Station in China, 8 in MPEC 2013-Y72 -- 2013 YZ37, 2006 YF, 2003 SJ215, 85818, 34613, 18109, 152742, 8201
L04ROASTERR-1 Obs., 1 in MPEC 2013-Y72 -- 2010 XZ67
434San Benedetto Po Obs. in Italy, 2 in MPEC 2013-Y72 -- 55532, 52760
H36Sandlot Obs. in Kansas, 9 in MPECs 2013-Y69, 2013-Y70, 2013-Y72, 2013-Y77, 2013-Y78, 2013-Y79, 2013-Y80, 2013-Y81 & 2013-Y82 -- 2013 YQ2, 2013 YM70, 2013 YM48, 2013 YL70, 2013 YL48, 2013 YK70, 2013 YK48, 2013 YD48, 2013 YC48
204Schiaparelli Obs. in Italy, 3 in MPECs 2013-Y69, 2013-Y72 & 2013-Y74 -- 2013 YG48, 2013 YC48, 2013 XY20
033Schwarzschild Obs. in Germany, 6 in MPECs 2013-Y69, 2013-Y70, 2013-Y72, 2013-Y77, 2013-Y78 & 2013-Y80 -- 2013 YL48, 2013 YK70, 2013 YK48, 2013 YE48, 2013 YD48, 2013 YC48
G404Don Cranford, Jr. in North Carolina via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2013-Y72 -- 2013 YL2
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2013-Y69 & 2013-Y72 -- 2013 YC48, 2006 YF, 2003 SJ215, 18109
291Spacewatch 1.8m telescope in Arizona, 21 in MPECs 2013-Y69, 2013-Y70, 2013-Y72, 2013-Y73, 2013-Y74, 2013-Y75, 2013-Y76, 2013-Y77, 2013-Y78, 2013-Y79, 2013-Y80 & 2013-Y82 -- 2013 YM70, 2013 YM48, 2013 YL48, 2013 YK70, 2013 YK48, 2013 YJ48, 2013 YH48, 2013 YG48, 2013 YF48, 2013 YE48, 2013 YD48, 2013 YC48, 2013 YC, 2013 WT67, 2013 US3, 2011 CY46, 2011 AR26, 2009 KE3, 2008 VN, 354713, 215188
I93St. Pardon de Conques Obs. in France, 3 in MPECs 2013-Y69, 2013-Y79 & 2013-Y82 -- 2013 YM70, 2013 YM48, 2013 YC48
926Tenagra II Obs. in Arizona, 10 in MPECs 2013-Y69, 2013-Y70, 2013-Y72, 2013-Y74 & 2013-Y75 -- 2013 YP2, 2013 YH48, 2013 YG48, 2013 YE48, 2013 YD48, 2013 YC48, 2013 YC38, 2013 YB14, 88213, 3102
A48Verona Obs. in Italy, 1 in MPEC 2013-Y72 -- 2010 XZ67
G33Wickede Obs. in Germany, 2 in MPEC 2013-Y72 -- 2010 XZ67, 2062
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-Y74 -- 2013 YG48
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 31 December '13

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 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 YD48JPL Sentry18062094-2105107.3e-06-4.24-4.340JPL #2 for the day: "Analysis based on 50 observations spanning 1.8636 days (2013-Dec-29.40682 to 2013-Dec-31.27047)." Diameter approximately 0.092 km. from mean, weighted H=22.8.
NEODyS18062094-2109116.37e-06-4.29-4.360NEODyS #2 for the day: "Based on 51 optical observations (of which 1 are rejected as outliers) from 2013-12-29.408 to 2013-12-31.271."
2013 YCJPL Sentry18062037-206821.8e-06-3.35-3.450JPL: "Analysis based on 46 observations spanning 8.1482 days (2013-Dec-23.16077 to 2013-Dec-31.30899)." Diameter approximately 0.189 km. from mean, weighted H=21.3.
NEODyS18062037-206821.79e-06-3.36-3.460NEODyS: "Based on 46 optical observations (of which 0 are rejected as outliers) from 2013-12-23.162 to 2013-12-31.310."

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 31 December '13

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

2321Grabbed MPEC 2013-Y80 - 2013 YK70 - see above
Grabbed MPEC 2013-Y81 - 2013 YL70 - see above
Grabbed MPEC 2013-Y82 - 2013 YM70 - see above
1840Generated Traffic Report
1806Noted that JPL Sentry has updated its 2013 YC risk assessment - see above
Noted that NEODyS has updated its 2013 YC risk assessment - see above
Noted that JPL Sentry has updated its 2013 YD48 risk assessment - see above
Noted that NEODyS has updated its 2013 YD48 risk assessment - see above
1548Noted that NEODyS has posted 2013 YD48 as an impact risk - see above
Grabbed MPEC 2013-Y72 - Daily Orbit Update - see above
Grabbed MPEC 2013-Y73 - 2013 YF48 - see above
Grabbed MPEC 2013-Y74 - 2013 YG48 - see above
Grabbed MPEC 2013-Y75 - 2013 YH48 - see above
Grabbed MPEC 2013-Y76 - 2013 YJ48 - see above
Grabbed MPEC 2013-Y77 - 2013 YK48 - see above
Grabbed MPEC 2013-Y78 - 2013 YL48 - see above
Grabbed MPEC 2013-Y79 - 2013 YM48 - see above
0436Noted that JPL Sentry has posted 2013 YD48 as an impact risk - see above
0018Grabbed MPEC 2013-Y69 - 2013 YC48 - see above
Grabbed MPEC 2013-Y70 - 2013 YD48 - see above
Grabbed MPEC 2013-Y71 - 2013 YE48 - see above