2012-01-07 Tracking News

Contents on 7 January '12

IAU Minor Planet Center
- NEOCP Activity -- four listings
- New MPECs -- one MPEC
Observers -- twelve observers
Impact Risk Monitoring -- one object
Chronology

Resources:

Consolidated Risk Tables - the CRT page (archive)
Earth's Busy Neighborhood close passer Traffic Report
Ephemerides for risk-rated & nearby objects + potential mission destinations
News image catalog
News old archive & Small Objects Archive
Object Links - mainly for radar targets & close passers - updated 8 Jan.

The latest A/CC news is available via framed access, 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.

NEOCP Activity on 7 January '12

The MPC's NEO Confirmation Page has 4 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four objects listed. Of these, one was a "one nighter."

New MPECs on 7 January '12

Minor Planet Electronic Circulars

There was one MPEC posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 7 Jan. '12 >> MPEC 2012-A38 - "06:05 UT" - Daily Orbit Update

Observations of risk-listed objects
K11Y28H 2011 YH28 (Q=4.486 AU, arc=10 days, H=20.2 ~309m) from the Spacewatch 1.8m telescope (Jan. 6.31p3)
Observations of recently (no longer) risk-listed objects
K11Y28J 2011 YJ28 (arc=10 days, H=21.0 ~214m) from Astronomical Research Obs. Westfield (Jan. 6.34-36p6)
K11Y00A 2011 YA (arc=21 days, H=18.6 ~645m) from LINEAR (Jan. 6.27-33p5) and Hamamatsu-Yuto Obs. (Jan. 6.53-58p11)
Observations of small asteroids (H>22.0)
K12A03C 2012 AC3 (arc=2 days, H=23.0 ~85m) from ARO Westfield (Jan. 5.19-20p3)
K12A03B 2012 AB3 (arc=2 days, H=24.0 ~54m) from ARO Westfield (Jan. 5.38p3 & 6.32-34p3)
K12A03A 2012 AA3 (arc=3 days, H=22.5 ~107m) from ARO Westfield (Jan. 5.34-36p3)
K12A00Y 2012 AY (arc=4 days, H=22.3 ~117m) from ARO Westfield (Jan. 6.30-32p6)
K11Y63M 2011 YM63 (arc=6 days, H=22.4 ~112m) from ARO Westfield (Jan. 5.36-37p3)
K11Y40H 2011 YH40 (arc=8 days, H=23.0 ~85m, close passer, radar support) from Hidetaka Sato via RAS Obs. Mayhill (Jan. 6.09-10p2) and Petit Jean Mtn. South Obs. (PJMSO) (Jan. 6.18-39p65)
K11Y29B 2011 YB29 (Q=4.267 AU, arc=8 days, H=23.7 ~62m) from ARO Westfield (Jan. 6.38-39p4)
K11X01D 2011 XD1 (arc=36 days, H=24.0 ~54m) from ARO Westfield (Jan. 6.44p3)
K11T06P 2011 TP6 (arc=95 days, H=25.5 ~27m, PMD candidate) from Spacewatch 1.8m (Jan. 6.43-45p3)
-- Potential mission destinations (PMD) list & ephemerides -- Planetary radar schedules: Arecibo & Goldstone
Observations of other objects
K12A03E 2012 AE3 (i=40.5°, arc=3 days, H=20.0 ~339m) from ARO Westfield (Jan. 6.30-31p3)
K12A01E 2012 AE1 (arc=5 days, H=18.8 ~589m) from ARO Westfield (Jan. 5.40-41p3) and LINEAR (Jan. 6.34-39p5)
K11Y40B 2011 YB40 (Q=4.069 AU, arc=9 days, H=19.2 ~490m) from ARO Westfield (Jan. 6.43p2)
K11Y28G 2011 YG28 (Q=4.536 AU, arc=10 days, H=21.5 ~170m) from ARO Westfield (Jan. 6.36-37p6)
K11Y15V 2011 YV15 (Q=4.473 AU, arc=12 days, H=17.1 ~1.29 km) from ARO Westfield (Jan. 6.40-41p6)
K11Y01W 2011 YW1 (arc=19 days, H=19.7 ~389m) from ARO Westfield (Jan. 5.23-24p3)
K11X02S 2011 XS2 (arc=21 days, H=18.2 ~776m) from the Siding Spring Survey (SSS) (Jan. 3.46p1)
K11X00E 2011 XE (arc=33 days, H=19.3 ~467m) from SSS (Jan. 3.45p1)
K11W44E 2011 WE44 (arc=42 days, H=20.6 ~257m) from Desert Moon Obs. (Jan. 6.17p1, 6.21p1 & 6.25p1)
K11W00A 2011 WA (arc=51 days, H=21.6 ~162m) from Spacewatch 1.8m (Jan. 6.13-15p2)
K11SA2L 2011 SL102 (arc=3 opp, H=18.2 ~776m) from LINEAR (Jan. 6.21-26p5) and Hamamatsu-Yuto Obs. (Jan. 6.46-50p5)
K10F00Q 2010 FQ (arc=2 opp, H=20.0 ~339m) from Spacewatch 1.8m (Jan. 6.52-53p3)
K09A15K 2009 AK15 (arc=2 opp, H=19.4 ~446m) from Rio Cuarto Obs. (Jan. 6.19-22p3)
K06BE7Q 2006 BQ147 (arc=5 opp, H=18.8 ~589m) from Rio Cuarto Obs. (Jan. 6.15-16p2)
K05Y00S 2005 YS (q=0.320 AU, arc=3 opp, H=19.6 ~407m) from ARO Westfield (Jan. 6.06-08p3)
K04Y05U 2004 YU5 (arc=2 opp, H=18.8 ~589m) from ARO Westfield (Jan. 6.11-13p3)
K04M00D 2004 MD (arc=3 opp, H=20.2 ~309m) from the Mt. Lemmon Survey (MLS) (Dec. 28.35-37p4)
K04J02O 2004 JO2 (arc=3 opp, H=17.3 ~1.17 km) from ARO Westfield (Jan. 5.15-16p3 & 6.07-08p5)
N7805 237805 2002 CF26 from Pan-STARRS 1 (PS1) (Jan. 6.65-67p4)
K9924 209924 2005 WS55 from Hamamatsu-Yuto Obs. (Jan. 6.37-38p5)
J0208 190208 2006 AQ from Desert Moon Obs. (Jan. 6.10-13p3)
G3760 163760 2003 OR14 from Desert Moon Obs. (Jan. 6.06-08p3)
E3381 143381 2003 BC21 from PS1 (Jan. 6.63-64p4 at w=21.8-22.1)
D7671 137671 1999 XP35 from LINEAR (Jan. 6.28-32p4)
40263 40263 1999 FQ5 from PS1 (Jan. 6.63-64p4)
24475 24475 2000 VN2 from Urseanu Obs. (Jan. 2.88-90p7)
06053 6053 1993 BW3 from Rio Cuarto Obs. (Jan. 6.27-29p3)
03122 3122 Florence (1981 ET3) from Rio Cuarto Obs. (Jan. 6.32-33p2)
01980 1980 Tezcatlipoca (1950 LA) from Rio Cuarto Obs. (Jan. 6.24-26p3)

Observers on 7 January '12

Twelve observers appeared in this day's MPEC.

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield in Illinois, 17 in MPEC 2012-A38 -- 2012 AY, 2012 AE3, 2012 AE1, 2012 AC3, 2012 AB3, 2012 AA3, 2011 YW1, 2011 YV15, 2011 YM63, 2011 YJ28, 2011 YG28, 2011 YB40, 2011 YB29, 2011 XD1, 2005 YS, 2004 YU5, 2004 JO2
`448`	Desert Moon Obs. in New Mexico, 3 in MPEC 2012-A38 -- 2011 WE44, 190208, 163760
`379`	Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2012-A38 -- 2011 YA, 2011 SL102, 209924
`704`	LINEAR in New Mexico, 4 in MPEC 2012-A38 -- 2012 AE1, 2011 YA, 2011 SL102, 137671
`G96`	Mt. Lemmon Survey in Arizona, 1 in MPEC 2012-A38 -- 2004 MD
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 3 in MPEC 2012-A38 -- 40263, 237805, 143381
`H45`	Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2012-A38 -- 2011 YH40
`H06\|`	Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-A38 -- 2011 YH40
`I20`	Rio Cuarto Obs. in Argentina, 5 in MPEC 2012-A38 -- 2009 AK15, 2006 BQ147, 6053, 3122, 1980
`E12`	Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2012-A38 -- 2011 XS2, 2011 XE
`291`	Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2012-A38 -- 2011 YH28, 2011 WA, 2011 TP6, 2010 FQ
`A92`	Urseanu Obs. in Romania, 1 in MPEC 2012-A38 -- 24475

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring on 7 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

2011 YH28	NEODyS	1735	R E M O V E D						-

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 7 January '12

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

2016 1/8	Grabbed MPEC 2012-A38 - Daily Orbit Update - see above
1735	Noted that NEODyS has removed 2011 YH28 as an impact risk - see above

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