Contents  on 23 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 23 January '13

One object reported inside ten LD

There is one asteroid reported passing within ten lunar distances (LD) of our planet today. 2013 BT15 is outbound from 5.54 to 6.55 LD.

On approach next, 2013 BS45 comes inside ten LD on January 30th, formerly risk-listed 2013 BV15 arrives on February 8th, and intruder 2012 DA14 (risk-listed radar target) on February 8th.

This report was updated at 2153 UTC with the discovery of departed 2013 BB70 (MPEC). Today's first traffic report was generated at 1642 UTC with follow-up in today's DOU MPEC for 2013 BS45, 2013 BV15, and departed objects 2013 AT72 and risk-listed intruder 2013 BR27.


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 23 January '13

The MPC's NEO Confirmation Page has 11 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eleven objects listed. Of these, four were "one nighters." So far The Tracking News has counted a total of seventeen 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 23 January '13

Minor Planet Electronic Circulars

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


MPEC 2013-B84 - "21:06 UT" - Comet C/2013 B2 (Catalina)


MPEC 2013-B83 - "18:41 UT" - 2013 BD70


MPEC 2013-B82 - "18:38 UT" - 2013 BC70


MPEC 2013-B81 - "18:35 UT" - 2013 BB70


MPEC 2013-B80 - "14:52 UT" - 2002 PH80


<< DOU on 23 Jan. '13 >>  MPEC 2013-B79 - "06:04 UT" - Daily Orbit Update


MPEC 2013-B78 - "00:52 UT" - 2006 YF


MPEC 2013-B77 - "00:29 UT" - Comet P/2013 AL76 (Catalina)

Observers  on 23 January '13

A total of 28 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 8 in MPECs 2013-B79 & 2013-B81 -- 2013 BW2, 2013 BU2, 2013 BT18, 2013 BS45, 2013 BR45, 2013 BB70, 2013 AA2, 2010 BB
300Bisei Spaceguard Center in Japan, 1 in MPEC 2013-B84 -- C/2013 B2
703Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2013-B77, 2013-B79, 2013-B81 & 2013-B84 -- 2013 BB70, C/2013 B2, 2013 AS76, P/2013 AL76, 2007 YX1, 349068, 162011, 154347, 153243, 5836, 1862
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPEC 2013-B79 -- 2013 BW2, 2013 BU2, 2013 BP18, 2013 BO27, 2013 BN18, 2012 QO10, 2006 DY
958Dax Obs. in France, 1 in MPEC 2013-B84 -- C/2013 B2
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2013-B79 -- 2013 BE19
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2013-B77 -- P/2013 AL76
F65$Ernesto Guido in Italy via Faulkes Telescope North in Hawaii, 1 in MPEC 2013-B84 -- C/2013 B2
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2013-B84 -- C/2013 B2
J95Great Shefford Obs. in England, 1 in MPEC 2013-B77 -- P/2013 AL76
C40Kuban State Univ. Obs. in Russia, 1 in MPEC 2013-B79 -- 99942
W85LCOGT Cerro Tololo A in Chile, 2 in MPEC 2013-B79 -- 2013 BQ45, 2013 BO45
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2013-B79 & 2013-B84 -- 2013 BN18, C/2013 B2
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-B80 -- 2002 PH80
213Montcabre Obs. in Spain, 1 in MPEC 2013-B79 -- 2013 AT72
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2013-B79, 2013-B82 & 2013-B83 -- 2013 BK18, 2013 BD70, 2013 BC70, 2013 AT76, 2013 AE4, 2005 RN33, 349068
A13Naef Obs. in Switzerland, 1 in MPEC 2013-B79 -- 2013 BE19
C27Pallerols Obs. in Spain, 4 in MPEC 2013-B79 -- 2013 AU27, 99942, 343098, 4179
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 3 in MPEC 2013-B79 -- 2013 BT45, 2013 AM60, 2012 XE112
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2013-B79 -- 99942
H36Sandlot Obs. in Kansas, 4 in MPECs 2013-B77, 2013-B79, 2013-B81 & 2013-B83 -- 2013 BD70, 2013 BB70, 2013 AS27, P/2013 AL76
204Schiaparelli Obs. in Italy, 1 in MPEC 2013-B84 -- C/2013 B2
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2013-B79 -- 229007, 5189
291Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2013-B77, 2013-B79 & 2013-B84 -- 2013 BV15, 2013 BU15, 2013 BS18, 2013 BS15, 2013 BR27, 2013 BK18, C/2013 B2, P/2013 AL76, 2012 DJ61
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2013-B84 -- C/2013 B2
C36Starry Wanderer Obs. in Belarus, 1 in MPEC 2013-B79 -- 2013 BE19
2904Carl Hergenrother via Vatican Advanced Technology Telescope (VATT) in Arizona, 2 in MPECs 2013-B78 & 2013-B79 -- 2006 YF, 163249
I15Wishing Star Obs. in Rhode Island, 3 in MPEC 2013-B79 -- 2013 BE19, 2013 AT76, 349068
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-B79 -- 307161
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 2 in MPECs 2013-B77 & 2013-B84 -- C/2013 B2, P/2013 AL76
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 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
2013 BC70NEODyS22502015-2047391.34e-07-5.64-6.080NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2013-01-22.324 to 2013-01-23.327."
JPL Sentry21542015-21061652.4e-06-4.62-5.430JPL: "Analysis based on 13 observations spanning 1.0023 days (2013-Jan-22.32357 to 2013-Jan-23.32586)." Diameter approximately 0.047 km. from mean, weighted H=24.3.
2013 BR27NEODyS22502067-2100583.51e-05-5.94-6.30NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2013-01-20.391 to 2013-01-22.416."
JPL Sentry16382073-2110513.7e-05-5.93-6.270JPL: "Analysis based on 18 observations spanning 2.0246 days (2013-Jan-20.39041 to 2013-Jan-22.41501)." Diameter approximately 0.010 km. from mean, weighted H=27.7.
2013 BL18NEODyS22502070-209261.24e-05-5.47-5.660NEODyS: "Based on 25 optical observations (of which 1 are rejected as outliers) from 2013-01-17.285 to 2013-01-21.523."
2013 BV15JPL Sentry1638R E M O V E DJPL: Risk listing removed at 1058 UTC.
2013 BU15JPL Sentry1638203817.8e-08-5.59-5.590JPL: "Analysis based on 24 observations spanning 4.9721 days (2013-Jan-17.35051 to 2013-Jan-22.32264)." Diameter approximately 0.092 km. from mean, weighted H=22.8.

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 23 January '13

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

2250Noted that NEODyS has posted 2013 BC70 as an impact risk - see above
Noted that NEODyS has updated its 2013 BL18 risk assessment - see above
Noted that NEODyS has updated its 2013 BR27 risk assessment - see above
2154Noted that JPL Sentry has posted 2013 BC70 as an impact risk - see above
Grabbed MPEC 2013-B84 - Comet C/2013 B2 (Catalina) - see above
2153Updated Traffic Report
1901Grabbed MPEC 2013-B81 - 2013 BB70 - see above
Grabbed MPEC 2013-B82 - 2013 BC70 - see above
Grabbed MPEC 2013-B83 - 2013 BD70 - see above
1638Noted that JPL Sentry has updated its 2013 BR27 risk assessment - see above
Noted that JPL Sentry has updated its 2013 BU15 risk assessment - see above
Noted that JPL Sentry has removed 2013 BV15 as an impact risk - see above
Grabbed MPEC 2013-B79 - Daily Orbit Update - see above
Grabbed MPEC 2013-B80 - 2002 PH80 - see above
0145Grabbed MPEC 2013-B77 - Comet P/2013 AL76 (Catalina) - see above
Grabbed MPEC 2013-B78 - 2006 YF - see above