Contents  on 24 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 24 January '13

One object reported inside ten LD

One asteroid is reported to be inside a radius of ten lunar distances (LD) from our planet today. 2013 BT15 is outbound from 6.55 to 7.75 LD.

Headed our way next, 2013 BS45 comes inside ten LD on January 30th, and 2013 BV15 and intruder 2012 DA14 (risk-listed radar target) arrive on February 8th.

This report was generated at 1732 UTC with follow-up in today's DOU MPEC for 2013 BS45 and departed 2013 BL18.

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 24 January '13

The MPC's NEO Confirmation Page has 8 listings

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

Minor Planet Electronic Circulars

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

MPEC 2013-B87 - "15:00 UT" - 2007 NQ

<< DOU on 24 Jan. '13 >>  MPEC 2013-B86 - "06:04 UT" - Daily Orbit Update

MPEC 2013-B85 - "00:57 UT" - 2013 BQ45

Observers  on 24 January '13

Fifteen observers appear in today's MPECs.

CodeObserver / observatory
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 11 in MPEC 2013-B86 -- 2013 BW2, 2013 BU2, 2013 BP18, 2013 BO27, 2013 BN18, 2013 BL18, 2012 XQ55, 2012 XD133, 2012 XC55, 2012 QE50, 2012 PP28
822Cordoba Obs. in Argentina, 1 in MPEC 2013-B86 -- 2011 KW15
448Desert Moon Obs. in New Mexico, 6 in MPEC 2013-B86 -- 2013 AY52, 2013 AW60, 2013 AW52, 2013 AT76, 2013 AO60, 313809
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2013-B86 -- 2013 BZ45
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-B87 -- 2007 NQ
711McDonald Obs. in Texas, 1 in MPEC 2013-B86 -- 2013 BS45
213Montcabre Obs. in Spain, 1 in MPEC 2013-B86 -- 349068
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2013-B86 -- 2013 AQ27, 2007 AG12, 3288
644NEAT's Mt. Palomar telescope in southern California, 1 in MPECs 2013-B85 & 2013-B86 -- 2013 BQ45
J50Nordic Near-Earth-Object Network, 1 in MPEC 2013-B86 -- 2002 PH80
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPEC 2013-B86 -- 338172, 108519
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2013-B86 -- 2013 BD70
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2013-B86 -- 99942
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-B86 -- 2013 AQ27
I15Wishing Star Obs. in Rhode Island, 1 in MPEC 2013-B86 -- 24761
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 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.





Notes for Today's Latest Risk Assessments
2013 BL18JPL Sentry17302070-209259.4e-06-5.58-5.800JPL: "Analysis based on 27 observations spanning 5.9997 days (2013-Jan-17.28384 to 2013-Jan-23.28354)." Diameter approximately 0.022 km. from mean, weighted H=26.0.
NEODyS17302070-209251.53e-05-5.37-5.540NEODyS: "Based on 27 optical observations (of which 1 are rejected as outliers) from 2013-01-17.285 to 2013-01-23.284."

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 24 January '13

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

1732Generated Traffic Report
1730Noted that JPL Sentry has updated its 2013 BL18 risk assessment - see above
Noted that NEODyS has updated its 2013 BL18 risk assessment - see above
Grabbed MPEC 2013-B86 - Daily Orbit Update - see above
Grabbed MPEC 2013-B87 - 2007 NQ - see above
0109Grabbed MPEC 2013-B85 - 2013 BQ45 - see above