Contents  on 27 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 27 December '13

Report not compiled yet

(Traffic Report not yet compiled for today. Click on left arrow immediately above for yesterday's report.)

NEOCP Activity  on 27 December '13

The MPC's NEO Confirmation Page has 17 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seventeen objects listed. Of these, five were "one nighters." So far The Tracking News has counted a total of 26 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 27 December '13

Minor Planet Electronic Circulars

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


MPEC 2013-Y50 - "20:49 UT" - 2013 YC14


MPEC 2013-Y49 - "20:43 UT" - 2013 YB14


MPEC 2013-Y48 - "20:37 UT" - 2013 YA14


MPEC 2013-Y47 - "20:31 UT" - 2013 YZ13


MPEC 2013-Y46 - "20:24 UT" - 2013 YY13


MPEC 2013-Y45 - "16:10 UT" - 2013 HO11


<< DOU on 27 Dec. '13 >>  MPEC 2013-Y44 - "14:02 UT" - Daily Orbit Update

Observers  on 27 December '13

A total of 30 observers appear in today's MPECs.

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 1 in MPEC 2013-Y47 -- 2013 YZ13
H21Astronomical Research Obs. Westfield in Illinois, 8 in MPECs 2013-Y44, 2013-Y45, 2013-Y46, 2013-Y47, 2013-Y49 & 2013-Y50 -- 2013 YZ13, 2013 YY13, 2013 YC14, 2013 YB14, 2013 VK5, 2013 UC, 2013 HO11, 2011 WU95
C77Bernezzo Obs. in Italy, 2 in MPECs 2013-Y49 & 2013-Y50 -- 2013 YC14, 2013 YB14
Z72Cademuir Obs., 2 in MPECs 2013-Y44 & 2013-Y47 -- 2013 YZ13, 52760
703Catalina Sky Survey (CSS) in Arizona, 4 in MPECs 2013-Y47, 2013-Y48, 2013-Y49 & 2013-Y50 -- 2013 YZ13, 2013 YC14, 2013 YB14, 2013 YA14
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 11 in MPECs 2013-Y44 & 2013-Y46 -- 2013 YY13, 2013 YF, 2013 YD, 2013 VM4, 2013 PD21, 2013 LH16, 2012 KF47, 2010 LJ14, 277616, 171576, 162361
958Dax Obs. in France, 1 in MPEC 2013-Y49 -- 2013 YB14
448Desert Moon Obs. in New Mexico, 4 in MPECs 2013-Y44 & 2013-Y46 -- 2013 YY13, 86324, 85990, 279744
113Drebach Obs. in Germany, 3 in MPECs 2013-Y47, 2013-Y49 & 2013-Y50 -- 2013 YZ13, 2013 YC14, 2013 YB14
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2013-Y49 -- 2013 YB14
I36Los Campitos Obs. in Argentina, 2 in MPEC 2013-Y44 -- 2013 UQ4, 2013 UH9
D54MASTER-II Obs. Blagoveshchensk in Russia, 1 in MPEC 2013-Y44 -- 1943
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2013-Y44, 2013-Y46, 2013-Y48, 2013-Y49 & 2013-Y50 -- 2013 YY13, 2013 YC14, 2013 YC, 2013 YB14, 2013 YA14
5682David Tholen's team on Mauna Kea in Hawaii, 5 in MPECs 2013-Y44 & 2013-Y46 -- 2013 YY13, 2013 WZ44, 2013 WR45, 2013 WR44, 2013 UU3
711McDonald Obs. in Texas, 2 in MPECs 2013-Y46 & 2013-Y47 -- 2013 YZ13, 2013 YY13
474Mt. John Obs. in New Zealand, 1 in MPEC 2013-Y50 -- 2013 YC14
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2013-Y44 & 2013-Y47 -- 2013 YZ13, 2010 KR10, 2008 HO3
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2013-Y44 -- 2001 QJ
F51Pan-STARRS 1 (PS1) in Hawaii, 15 in MPECs 2013-Y44 & 2013-Y46 -- 2013 YY13, 2013 YL2, 2013 WT44, 2011 GQ65, 2010 SL13, 85839, 85709, 378526, 307564, 29075, 185851, 10150, 5863, 4055, 3271
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 10 in MPEC 2013-Y44 -- 2013 YL2, 2013 XZ21, 2013 XH4, 2013 XA4, 2013 NJ, 2010 XZ67, 2009 XZ1, 2008 AJ33, 85182, 52760
D29Purple Mtn. Obs. Xuyi Station in China, 10 in MPEC 2013-Y44 -- 2013 XV8, 2013 XF22, 2013 NX23, 2003 XB22, 55532, 34613, 18109, 152742, 12923, 9950
461SZTE Asteroid Program in Hungary, 1 in MPEC 2013-Y49 -- 2013 YB14
854Sabino Canyon Obs. in Arizona, 4 in MPECs 2013-Y46, 2013-Y47, 2013-Y49 & 2013-Y50 -- 2013 YZ13, 2013 YY13, 2013 YC14, 2013 YB14
H36Sandlot Obs. in Kansas, 6 in MPECs 2013-Y44, 2013-Y46, 2013-Y47, 2013-Y48, 2013-Y49 & 2013-Y50 -- 2013 YZ13, 2013 YY13, 2013 YC14, 2013 YB14, 2013 YA14, 2013 TV5
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2013-Y44 -- 2013 XH4, 55532, 154300
291Spacewatch 1.8m telescope in Arizona, 23 in MPECs 2013-Y44, 2013-Y46 & 2013-Y49 -- 2013 YY13, 2013 YT2, 2013 YC, 2013 YB14, 2013 XW3, 2013 XS3, 2013 XH4, 2013 XG4, 2013 XB10, 2013 WW44, 2013 WN67, 2013 WF108, 2013 WC44, 2013 US3, 2013 UG9, 2013 TS132, 2013 QJ10, 2013 GS38, 2013 GG69, 2013 BZ45, 2009 KE3, 2008 VN, 215188
I93St. Pardon de Conques Obs. in France, 3 in MPECs 2013-Y48, 2013-Y49 & 2013-Y50 -- 2013 YC14, 2013 YB14, 2013 YA14
673!Jana Pittichova via Table Mtn. Obs. in southern California, 2 in MPECs 2013-Y46 & 2013-Y47 -- 2013 YZ13, 2013 YY13
926Tenagra II Obs. in Arizona, 5 in MPECs 2013-Y44, 2013-Y46 & 2013-Y47 -- 2013 YZ13, 2013 YY13, 2013 YG, 2013 UX14, 313538
718Wiggins Obs. in Utah, 2 in MPECs 2013-Y44 & 2013-Y47 -- 2013 YZ13, 2013 XZ21
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 27 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 YCJPL Sentry17432037-206848.7e-07-3.68-3.760JPL: "Analysis based on 35 observations spanning 4.0638 days (2013-Dec-23.16077 to 2013-Dec-27.22455)." Diameter approximately 0.190 km. from mean, weighted H=21.3.
NEODyS17432037-206821.0e-07-4.41-4.590NEODyS: "Based on 35 optical observations (of which 0 are rejected as outliers) from 2013-12-23.162 to 2013-12-27.225."
2013 WZ44JPL Sentry1743211113.0e-06-6.12-6.120JPL: "Analysis based on 40 observations spanning 24.061 days (2013-Nov-28.411 to 2013-Dec-22.471507)." Diameter approximately 0.025 km. from mean, weighted H=25.7.
NEODyS17432111-211124.59e-06-5.94-5.940NEODyS: "Based on 40 optical observations (of which 0 are rejected as outliers) from 2013-11-28.412 to 2013-12-22.472."

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 27 December '13

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

2117Grabbed MPEC 2013-Y50 - 2013 YC14 - see above
2048Grabbed MPEC 2013-Y46 - 2013 YY13 - see above
Grabbed MPEC 2013-Y47 - 2013 YZ13 - see above
Grabbed MPEC 2013-Y48 - 2013 YA14 - see above
Grabbed MPEC 2013-Y49 - 2013 YB14 - see above
1743Noted that JPL Sentry has updated its 2013 WZ44 risk assessment - see above
Noted that NEODyS has updated its 2013 WZ44 risk assessment - see above
Noted that JPL Sentry has updated its 2013 YC risk assessment - see above
Noted that NEODyS has updated its 2013 YC risk assessment - see above
Grabbed MPEC 2013-Y45 - 2013 HO11 - see above
1551Grabbed MPEC 2013-Y44 - Daily Orbit Update - see above