Contents  on 17 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 17 January '13

One object reported inside ten LD

One asteroid is reported flying inside ten lunar distances (LD) of our planet today. Within Earth's Hill sphere, 2013 AP72 is outbound from 2.10 to 3.39 LD.

Next known to be approaching are 2013 AT72, which arrives inside ten LD on January 19th, and intruder 2012 DA14, a risk-listed radar target that arrives on February 8th.

This report was generated at 1906 UTC with the discoveries of already departed objects 2013 BY2 (MPEC) and 2013 BV2 (MPEC), plus follow-up in today's DOU MPEC for 2013 AT72 and departed risk-listed 2012 YR1.


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.

Radar Astrometry  on 17 January '13

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 0638 UTC when the database was dated 16 Jan.

NEOCP Activity  on 17 January '13

The MPC's NEO Confirmation Page has 169 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 169 objects listed. Of these, 149 were "one nighters." So far The Tracking News has counted a total of 251 listings on the NEOCP today.

New MPECs  on 17 January '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-B17 - "17:36 UT" - 2013 AA2


MPEC 2013-B16 - "16:56 UT" - 2013 BY2


MPEC 2013-B15 - "16:53 UT" - 2013 BX2


MPEC 2013-B14 - "16:50 UT" - 2013 BW2


MPEC 2013-B13 - "16:47 UT" - 2013 BV2


MPEC 2013-B12 - "16:44 UT" - 2013 BU2


MPEC 2013-B11 - "16:41 UT" - 2013 AJ91


MPEC 2013-B10 - "16:25 UT" - 1996 BG1


MPEC 2013-B09 - "12:46 UT" - 2011 TO


<< DOU on 17 Jan. '13 >>  MPEC 2013-B08 - "06:03 UT" - Daily Orbit Update


MPEC 2013-B07 - "01:07 UT" - 2013 AU76

Observers  on 17 January '13

A total of 37 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-B12 -- 2013 BU2
251Arecibo in Puerto Rico, 1 in radar -- 162421
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2013-B07 & 2013-B11 -- 2013 AU76, 2013 AJ91
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2013-B11 -- 2013 AJ91
C77Bernezzo Obs. in Italy, 1 in MPEC 2013-B12 -- 2013 BU2
300Bisei Spaceguard Center in Japan, 3 in MPECs 2013-B07, 2013-B12 & 2013-B14 -- 2013 BW2, 2013 BU2, 2013 AU76
703Catalina Sky Survey (CSS) in Arizona, 13 in MPECs 2013-B07, 2013-B08, 2013-B11, 2013-B12 & 2013-B14 -- 2013 BW2, 2013 BU2, 2013 AU76, 2013 AU27, 2013 AJ91, 2009 BL2, 285110, 177651, 17188, 137925, 137924, 136793, 3908
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPEC 2013-B08 -- 2013 AX52, 2013 AW60, 2013 AV60, 2013 AT72, 2013 AS72, 2013 AG76, 2013 AF69, 2013 AB32, 2012 TH79, 2002 XZ38
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 3 in MPECs 2013-B07, 2013-B08 & 2013-B11 -- 2013 AU76, 2013 AJ91, 2004 BV1
I48El Catalejo Obs. in Argentina, 1 in MPEC 2013-B12 -- 2013 BU2
I19El Gato Gris Obs. in Argentina, 1 in MPEC 2013-B14 -- 2013 BW2
734Farpoint Obs. in Kansas, 1 in MPEC 2013-B08 -- 2013 AS27
C18Frasnes-Lez-Anvaing Obs. in Belgium, 2 in MPEC 2013-B08 -- 343098, 4179
J95Great Shefford Obs. in England, 1 in MPEC 2013-B11 -- 2013 AJ91
D00ISON-Kislovodsk Obs., 1 in MPEC 2013-B08 -- 203471
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2013-B08 -- 22753
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2013-B10 -- 1996 BG1
699LONEOS in Arizona, 1 in MPEC 2013-B17 -- 2013 AA2
J75La Sagra Obs. in Spain, 1 in MPEC 2013-B07 -- 2013 AU76
C41MASTER-II Obs. Kislovodsk in Russia, 1 in MPEC 2013-B08 -- 154347
H01Magdalena Ridge Obs. (MRO) in New Mexico, 8 in MPECs 2013-B07, 2013-B10, 2013-B11, 2013-B12, 2013-B13, 2013-B14, 2013-B15 & 2013-B16 -- 2013 BY2, 2013 BX2, 2013 BW2, 2013 BV2, 2013 BU2, 2013 AU76, 2013 AJ91, 1996 BG1
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPECs 2013-B08 & 2013-B09 -- 2012 YR1, 2011 TO
711McDonald Obs. in Texas, 1 in MPEC 2013-B07 -- 2013 AU76
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2013-B08, 2013-B10, 2013-B12, 2013-B13, 2013-B14 & 2013-B17 -- 2013 BW2, 2013 BV2, 2013 BU2, 2013 AA2, 2009 BL2, 2001 YT3, 1996 BG1, 85990, 137925
A24New Millennium Obs. in Italy, 4 in MPEC 2013-B08 -- 262623, 192563, 5646, 4179
557Ondrejov Obs. in the Czech Republic, 1 in MPEC 2013-B08 -- 1994 XD
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2013-B17 -- 2013 AA2
F51Pan-STARRS 1 (PS1) in Hawaii, 12 in MPECs 2013-B08, 2013-B15 & 2013-B16 -- 2013 BY2, 2013 BX2, 2013 AP27, 2013 AC, 2005 YP55, 2004 XN14, 2002 PG43, 1998 QR15, 1989 VB, 39572, 177614, 4486
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2013-B08 -- 2012 PQ28
C20Pulkovo Obs. Kislovodsk Mtn. Station in Russia, 1 in MPEC 2013-B08 -- 99942
H36Sandlot Obs. in Kansas, 5 in MPECs 2013-B07, 2013-B08, 2013-B11 & 2013-B16 -- 2013 BY2, 2013 AU76, 2013 AO60, 2013 AJ91, 2013 AG53
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2013-B08 -- 2013 AV60
645Sloan Digital Sky Survey in New Mexico, 1 in MPEC 2013-B08 -- 2005 YP55
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2013-B17 -- 2013 AA2
926Tenagra II Obs. in Arizona, 1 in MPEC 2013-B17 -- 2013 AA2
D20Zadko Obs. in Western Australia, 1 in MPEC 2013-B08 -- 99942
H06iTelescope Obs. Mayhill in New Mexico, 3 in MPECs 2013-B08 & 2013-B12 -- 2013 BU2, 2013 AU27, 2012 TJ146
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 January '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
2012 YR1JPL Sentry1656207713.7e-07-7.48-7.480JPL: "Analysis based on 19 observations spanning 23.330 days (2012-Dec-20.20945 to 2013-Jan-12.53922)." Diameter approximately 0.016 km. from mean, weighted H=26.7.
NEODyS1656R E M O V E D-
2011 TOJPL Sentry16562064-207635.3e-06-6.00-6.000JPL: "Analysis based on 41 observations spanning 469.18 days (2011-Oct-01.23672 to 2013-Jan-12.420455)." Diameter approximately 0.019 km. from mean, weighted H=26.3.
NEODyS16562061-207658.39e-06-5.81-5.820NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2011-10-01.237 to 2013-01-12.421."

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 17 January '13

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

1906Generated Traffic Report
1839Grabbed MPEC 2013-B17 - 2013 AA2 - see above
1732Grabbed MPEC 2013-B16 - 2013 BY2 - see above
1656Noted that JPL Sentry has updated its 2011 TO risk assessment - see above
Noted that NEODyS has updated its 2011 TO risk assessment - see above
Noted that JPL Sentry has updated its 2012 YR1 risk assessment - see above
Noted that NEODyS has removed 2012 YR1 as an impact risk - see above
Grabbed MPEC 2013-B08 - Daily Orbit Update - see above
Grabbed MPEC 2013-B09 - 2011 TO - see above
Grabbed MPEC 2013-B10 - 1996 BG1 - see above
Grabbed MPEC 2013-B11 - 2013 AJ91 - see above
Grabbed MPEC 2013-B12 - 2013 BU2 - see above
Grabbed MPEC 2013-B13 - 2013 BV2 - see above
Grabbed MPEC 2013-B14 - 2013 BW2 - see above
Grabbed MPEC 2013-B15 - 2013 BX2 - see above
0638Noted Radar Astrometry database update - see above
0115Grabbed MPEC 2013-B07 - 2013 AU76 - see above