Contents  on 22 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 22 January '13

One object reported inside ten LD

One object is reported to be inside ten lunar distances (LD) from Earth today. 2013 BT15 is outbound from 4.84 to 5.54 LD.

Next known to be moving into the neighborhood, newly announced 2013 BS45 arrives inside ten LD on January 30th, risk-listed 2013 BV15 arrives on February 8th, and intruder 2012 DA14 (risk-listed radar target) on February 8th.

This report was generated at 1821 UTC with new discovery 2013 BS45 (MPEC) and first follow-up for three objects in today's DOU MPEC. Departed risk-listed 2013 BL18 had its observing arc doubled to 4.24 days. 2013 BV15's arc was tripled to three days, improving JPL's uncertainty to 4.8 hours (it had been greater than ten days) and moving the closest approach time calculation from February 11th to the 13th, but only changing the closest approach distance from 3.38 to 3.71 LD. And 4.72 days were added to the 1.23-day arc for departed 2013 BV2.

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 22 January '13

The MPC's NEO Confirmation Page has 15 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had fifteen objects listed. Of these, eleven were "one nighters." So far The Tracking News has counted a total of 69 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 22 January '13

Minor Planet Electronic Circulars

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

MPEC 2013-B76 - "20:53 UT" - 2008 EQ7

MPEC 2013-B75 - "13:53 UT" - 2013 BZ45

MPEC 2013-B74 - "13:50 UT" - 2013 BY45

MPEC 2013-B73 - "13:24 UT" - 2013 BT45

MPEC 2013-B72 - "13:21 UT" - 2013 BS45

MPEC 2013-B71 - "13:18 UT" - 2013 BR45

MPEC 2013-B70 - "13:15 UT" - 2013 BQ45

MPEC 2013-B69 - "13:12 UT" - 2013 BP45

MPEC 2013-B68 - "13:09 UT" - 2013 BO45

<< DOU on 22 Jan. '13 >>  MPEC 2013-B67 - "06:04 UT" - Daily Orbit Update

Observers  on 22 January '13

Nineteen observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-B67 -- 99942
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2013-B73 & 2013-B76 -- 2013 BT45, 2008 EQ7
C77Bernezzo Obs. in Italy, 1 in MPEC 2013-B67 -- 2013 BE19
703Catalina Sky Survey (CSS) in Arizona, 3 in MPECs 2013-B67 & 2013-B74 -- 2013 BY45, 2013 AT76, 1916
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2013-B74 -- 2013 BY45
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2013-B67 -- 2013 BE19
F658David Tholen's team in Hawaii via Faulkes Telescope North in Hawaii, 5 in MPEC 2013-B67 -- 2013 BV15, 2013 BU15, 2013 BL18, 2005 DD, 99942
J95Great Shefford Obs. in England, 1 in MPEC 2013-B73 -- 2013 BT45
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2013-B69, 2013-B70, 2013-B71, 2013-B74 & 2013-B75 -- 2013 BZ45, 2013 BY45, 2013 BR45, 2013 BQ45, 2013 BP45
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2013-B67, 2013-B70 & 2013-B75 -- 2013 BZ45, 2013 BQ45, 2013 BF27, 2013 BE19, 2013 AW60, 2013 AS27, 2013 AQ72, 2013 AP60, 235700, 138325
F51Pan-STARRS 1 (PS1) in Hawaii, 14 in MPECs 2013-B67, 2013-B68, 2013-B69 & 2013-B73 -- 2013 BT45, 2013 BP45, 2013 BO45, 2013 AP27, 2013 AG76, 2009 SN98, 2009 BL2, 2003 VG1, 277127, 232368, 10115, 7358, 3199, 1864
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2013-B67 -- 2013 BU2, 2012 YN6, 4179
H36Sandlot Obs. in Kansas, 3 in MPECs 2013-B70, 2013-B72 & 2013-B74 -- 2013 BY45, 2013 BS45, 2013 BQ45
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2013-B71 & 2013-B72 -- 2013 BS45, 2013 BR45
291Spacewatch 1.8m telescope in Arizona, 16 in MPECs 2013-B67, 2013-B68, 2013-B69, 2013-B70, 2013-B71, 2013-B72, 2013-B74 & 2013-B75 -- 2013 BZ45, 2013 BY45, 2013 BV2, 2013 BU15, 2013 BS45, 2013 BS18, 2013 BS15, 2013 BR45, 2013 BQ45, 2013 BP45, 2013 BO45, 2013 BL18, 2013 BK18, 2013 BG18, 2013 AX52, 2012 VF5
C36Starry Wanderer Obs. in Belarus, 1 in MPEC 2013-B67 -- 2013 BE19
G52Stone Edge Obs. in northern California, 1 in MPEC 2013-B67 -- 2013 BU2
2904Carl Hergenrother via Vatican Advanced Technology Telescope (VATT) in Arizona, 6 in MPEC 2013-B67 -- 2013 BP18, 2013 AS76, 2013 AR60, 2013 AJ91, 2013 AG53, 2012 YJ8
H06iTelescope Obs. Mayhill in New Mexico, 2 in MPEC 2013-B67 -- 2013 BE19, 12711
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 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 BS18JPL Sentry1711R E M O V E DJPL: Risk listing removed at 1051 UTC.
NEODyS1711R E M O V E D-
2013 BL18JPL Sentry17112070-209258.3e-06-5.64-5.870JPL: "Analysis based on 25 observations spanning 4.2383 days (2013-Jan-17.28384 to 2013-Jan-21.522128)." Diameter approximately 0.022 km. from mean, weighted H=26.0.
2013 BG18JPL Sentry1711R E M O V E DJPL: Risk listing removed at 1052 UTC.
2013 BV15JPL Sentry17112072-210146.6e-08-6.98-7.220JPL: "Analysis based on 14 observations spanning 4.0313 days (2013-Jan-17.48093 to 2013-Jan-21.512229)." Diameter approximately 0.049 km. from mean, weighted H=24.2.
NEODyS1711R E M O V E D-
2013 BU15JPL Sentry1711203811.4e-07-5.33-5.330JPL: "Analysis based on 21 observations spanning 4.1843 days (2013-Jan-17.35051 to 2013-Jan-21.534788)." Diameter approximately 0.093 km. from mean, weighted H=22.8.
NEODyS1711R E M O V E D-
2013 BS15JPL Sentry1711R E M O V E DJPL: Risk listing removed at 1133 UTC.
NEODyS1711R E M O V E D-
2013 AP60JPL Sentry1711207815.9e-10-5.08-5.080JPL: "Analysis based on 33 observations spanning 12.018 days (2013-Jan-09.0869 to 2013-Jan-21.10529)." Diameter approximately 1.600 km. from mean, weighted H=16.6.

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 22 January '13

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

2135Grabbed MPEC 2013-B76 - 2008 EQ7 - see above
1821Generated Traffic Report
1711Noted that JPL Sentry has posted 2013 AP60 as an impact risk - see above
Noted that JPL Sentry has removed 2013 BG18 as an impact risk - see above
Noted that JPL Sentry has updated its 2013 BL18 risk assessment - see above
Noted that JPL Sentry has removed 2013 BS15 as an impact risk - see above
Noted that NEODyS has removed 2013 BS15 as an impact risk - see above
Noted that JPL Sentry has removed 2013 BS18 as an impact risk - see above
Noted that NEODyS has removed 2013 BS18 as an impact risk - see above
Noted that JPL Sentry has updated its 2013 BU15 risk assessment - see above
Noted that NEODyS has removed 2013 BU15 as an impact risk - see above
Noted that JPL Sentry has updated its 2013 BV15 risk assessment - see above
Noted that NEODyS has removed 2013 BV15 as an impact risk - see above
Grabbed MPEC 2013-B67 - Daily Orbit Update - see above
Grabbed MPEC 2013-B68 - 2013 BO45 - see above
Grabbed MPEC 2013-B69 - 2013 BP45 - see above
Grabbed MPEC 2013-B70 - 2013 BQ45 - see above
Grabbed MPEC 2013-B71 - 2013 BR45 - see above
Grabbed MPEC 2013-B72 - 2013 BS45 - see above
Grabbed MPEC 2013-B73 - 2013 BT45 - see above
Grabbed MPEC 2013-B74 - 2013 BY45 - see above
Grabbed MPEC 2013-B75 - 2013 BZ45 - see above