Contents  on 22 January '12

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 '12

Seven objects reported inside ten LD

Seven asteroids are reported to be passing within ten lunar distances (LD) of Earth today. Intruder 2012 BV1 exits Earth's Hill sphere and 2012 BS1 enters Earth's Hill sphere. More distantly, risk-listed 2012 BY1 comes inside ten LD today, traveling from 10.03 to 6.03 LD, risk-listed 2012 BW13 comes in from 11.4 to 8.8 LD*, 2012 AQ10 exits ten LD, traveling from 8.90 to 10.43 LD, risk-listed 2012 BL14 leaves ten LD, moving from 8.92 to 13.37 LD, and risk-listed 2012 BK14 exits ten LD, passing from 9.2 to 10.3 LD*.

2012 BD14 arrives inside ten LD on January 25th and radar target 2011 CP4 arrives inside ten LD on February 22nd.

This report was updated at 1836 UTC, noting follow-up in today's DOU MPEC for 2012 BC14, 2012 BZ13, 2012 BW13, 2012 BO11, 2012 BY1, 2012 BU1, and 2012 BS1. However, info such as distances from Earth has not been updated yet due to the unavailability of NASA/JPL SSD Horizons.


Notes: Ten LD has no astronomical significance but is a useful reporting boundary. Earth's Hill sphere (of gravitational influence) has a radius estimated at about 3.89 LD. Distances are interpreted by A/CC from JPL Horizons data. "LD*" indicates some passage uncertainty. See also today's timeline plus current additional details, sky chart, and ephemerides.

NEOCP Activity  on 22 January '12

The MPC's NEO Confirmation Page has 21 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 21 objects listed. Of these, thirteen were "one nighters." So far The Tracking News has counted a total of 32 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 '12

Minor Planet Electronic Circulars

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


MPEC 2012-B49 - "16:04 UT" - 2011 YU74


<< DOU on 22 Jan. '12 >>  MPEC 2012-B48 - "06:04 UT" - Daily Orbit Update

Observers  on 22 January '12

A total of 26 observers appear in today's MPECs.

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 4 in MPEC 2012-B48 -- 32906, 21088, 162186, 4183
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2012-B48 -- 2012 AE3
I99Blanquita Obs. in Spain, 2 in MPEC 2012-B48 -- 2011 WV134, 1996 AE2
703Catalina Sky Survey (CSS) in Arizona, 13 in MPECs 2012-B48 & 2012-B49 -- 2012 BS1, 2011 YU74, 2006 VY13, 1997 CZ3, 162186, 153951, 143678, 143651, 142348, 141018, 6050, 4503, 2061
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPECs 2012-B48 & 2012-B49 -- 2012 BO11, 2012 BG11, 2011 YU74, 2011 QF14, 2009 AK15, 2007 EX
448Desert Moon Obs. in New Mexico, 4 in MPEC 2012-B48 -- 2012 AU10, 2012 AC3, 2011 YZ28, 2002 AW
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 2 in MPEC 2012-B48 -- 2012 BX13, 2012 BA14
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-B48 -- 2012 BC14
J95Great Shefford Obs. in England, 1 in MPEC 2012-B48 -- 2012 BW13
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2012-B48 -- 143651
695{program code "{" (31) via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2012-B48 -- 2012 BE14
704LINEAR in New Mexico, 16 in MPEC 2012-B48 -- 2012 BZ13, 2011 XE1, 2011 WV134, 2006 VY13, 2005 AH14, 2003 BK47, 2003 AF23, 2002 AW, 99799, 310442, 289315, 9400, 8567, 7753, 4503, 3554
950.Ovidiu Vaduvescu via La Palma in the Canary Islands, 1 in MPEC 2012-B48 -- 2011 XZ1
J75La Sagra Obs. in Spain, 1 in MPEC 2012-B49 -- 2011 YU74
844Los Molinos Obs. in Uruguay, 1 in MPEC 2012-B48 -- 138013
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPEC 2012-B48 -- 2012 BN11, 2012 BK11
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2012-B48 & 2012-B49 -- 2011 YU74, 21088
644NEAT's Mt. Palomar telescope in southern California, 2 in MPEC 2012-B48 -- 2002 VQ14, 152754
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2012-B48 -- 141593
F51Pan-STARRS 1 (PS1) in Hawaii, 6 in MPECs 2012-B48 & 2012-B49 -- 2012 BO11, 2011 YU74, 2008 GE1, 96631, 275792, 3103
B49Paus Obs. in Spain, 2 in MPEC 2012-B48 -- 2012 BY1, 2012 AE1
A53Peschiera del Garda Obs. in Italy, 2 in MPEC 2012-B48 -- 32906, 209924
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 2 in MPEC 2012-B48 -- 2012 BG14, 2012 BA14
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2012-B48 -- 2011 YM63
691Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2012-B48 & 2012-B49 -- 2011 YU74, 1997 CZ3, 96631, 39557, 31346, 162038
291Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2012-B48 -- 2012 BU1, 2012 BN11, 2012 BK11, 2011 YM63, 2005 CV25
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 January '12

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 BL14NEODyS16562023-2090801.27e-05-5.82-6.130NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2012-01-21.375 to 2012-01-21.494."
2012 BJ14NEODyS16562025-2089277.64e-07-5.04-5.290NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2012-01-20.514 to 2012-01-21.354."
2012 BW13JPL Sentry16562072-2111201.1e-05-6.17-6.490JPL: "Analysis based on 16 observations spanning 2.7828 days (2012-Jan-19.20743 to 2012-Jan-21.99019)." Diameter approximately 0.013 km. from mean, weighted H=27.1.
NEODyS16562072-2089102.24e-06-6.80-7.370NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2012-01-19.208 to 2012-01-21.991."
2012 BO11NEODyS16562072-207211.28e-09-9.38-9.380NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2012-01-19.493 to 2012-01-21.486."
JPL Sentry1656R E M O V E DJPL: Risk listing removed at 0854 UTC.
2012 BN11JPL Sentry1656R E M O V E DJPL: Risk listing removed at 0852 UTC.
NEODyS1656R E M O V E D-
2012 BK11JPL Sentry1656R E M O V E DJPL: Risk listing removed at 0849 UTC.
NEODyS1656R E M O V E D-
2012 BY1JPL Sentry16562043-210182.6e-06-5.73-6.060JPL: "Analysis based on 16 observations spanning 3.5096 days (2012-Jan-18.39002 to 2012-Jan-21.89957)." Diameter approximately 0.024 km. from mean, weighted H=25.8.
NEODyS16562043-208162.14e-06-5.80-6.110NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2012-01-18.391 to 2012-01-21.900."
2012 BU1JPL Sentry16562059-2112261.2e-04-5.57-6.070JPL: "Analysis based on 28 observations spanning 3.0948 days (2012-Jan-18.32077 to 2012-Jan-21.41555)." Diameter approximately 0.010 km. from mean, weighted H=27.7.
NEODyS16562084-208625.08e-06-6.85-6.850NEODyS: "Based on 28 optical observations (of which 1 are rejected as outliers) from 2012-01-18.322 to 2012-01-21.416."

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 '12

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

1836Posted Traffic Report
1656Noted that NEODyS has posted 2012 BJ14 as an impact risk - see above
Noted that JPL Sentry has removed 2012 BK11 as an impact risk - see above
Noted that NEODyS has removed 2012 BK11 as an impact risk - see above
Noted that NEODyS has posted 2012 BL14 as an impact risk - see above
Noted that JPL Sentry has removed 2012 BN11 as an impact risk - see above
Noted that NEODyS has removed 2012 BN11 as an impact risk - see above
Noted that JPL Sentry has removed 2012 BO11 as an impact risk - see above
Noted that NEODyS has updated its 2012 BO11 risk assessment - see above
Noted that JPL Sentry has updated its 2012 BU1 risk assessment - see above
Noted that NEODyS has updated its 2012 BU1 risk assessment - see above
Noted that JPL Sentry has updated its 2012 BW13 risk assessment - see above
Noted that NEODyS has posted 2012 BW13 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 BY1 risk assessment - see above
Noted that NEODyS has updated its 2012 BY1 risk assessment - see above
Grabbed MPEC 2012-B48 - Daily Orbit Update - see above
Grabbed MPEC 2012-B49 - 2011 YU74 - see above