2012-01-08 Tracking News

Contents on 8 January '12

IAU Minor Planet Center
- NEOCP Activity -- nine listings
- New MPECs -- two MPECs
Observers -- fourteen observers
Impact Risk Monitoring -- two objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page (archive)
Of 425 risk-listed objects, 22 have had news in the last 31 days. Updated at 2301 UTC on 8 Jan.
Earth's Busy Neighborhood close passer Traffic Report
Two objects are known to be within ten LD of Earth today. Updated at 2029 UTC on 8 Jan.
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 8 January '12

The MPC's NEO Confirmation Page has 9 listings

When last checked at 2300 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had nine objects listed. Of these, five were "one nighters." So far The Tracking News has counted a total of ten 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 8 January '12

Minor Planet Electronic Circulars

As of last check at 2300 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2012-A39 time-stamped "06:03 UT" - Daily Orbit Update - see below
MPEC 2012-A40 time-stamped "15:16 UT" - 2011 EC7

MPEC 2012-A40 - "15:16 UT" - 2011 EC7

K11E07C 2011 EC7 (Q=4.016 AU, H=21.2 ~195m) from David Tholen's team on Mauna Kea (Nov. 24.35-36p3 at R=24.4-6 & 27.52p1 at R=24.0)

<< DOU on 8 Jan. '12 >> MPEC 2012-A39 - "06:03 UT" - Daily Orbit Update

Observations of risk-listed objects
K11X02C 2011 XC2 (small asteroid, arc=22 days, H=23.1 ~81m, close passer) from Astronomical Research Obs. Westfield (Dec. 26.17-20p2 at V=22.3-6)
Observations of recently (no longer) risk-listed objects
K11Y00A 2011 YA (arc=22 days, H=18.6 ~645m) from ARO Westfield (Jan. 6.28-30p8 & 7.25-26p8), LINEAR (Jan. 7.27-32p5), Hamamatsu-Yuto Obs. (Jan. 7.56-59p6), and Atlante Obs. (Jan. 7.97-98p3)
Observations of small asteroids (H>22.0)
K12A03B 2012 AB3 (arc=4 days, H=24.1 ~51m) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Jan. 7.35-36p6)
K12A00Y 2012 AY (arc=6 days, H=22.3 ~117m) from ARO Westfield (Jan. 7.29-30p4) and GiaGa Obs. (Jan. 8.02p1 & 8.07p1)
K11Y63M 2011 YM63 (arc=7 days, H=22.4 ~112m) from ARO Westfield (Jan. 6.34-35p4 & 7.30-31p3)
K11Y62T 2011 YT62 (arc=9 days, H=22.4 ~112m, close passer) from ARO Westfield (Jan. 7.19-20p4)
K11Y40H 2011 YH40 (arc=9 days, H=23.0 ~85m, close passer, radar support) from ARO Westfield (Jan. 6.32-33p5 & 7.22-23p7)
K11Y15W 2011 YW15 (arc=10 days, H=24.7 ~39m, close passer) from ARO Westfield (Jan. 6.45-46p4)
K02B25F 2002 BF25 (arc=3 opp, H=22.3 ~117m, PMD) from ARO Westfield (Jan. 7.03-04p4)
Observation campaigns for radar support & potential mission destinations (PMDs)
K01Y04E 2001 YE4 (q=0.311 AU, arc=2 opp, H=20.7 ~245m, radar) from NEAT's Mt. Palomar telescope (2002 Jan. 4.53-56p2)
J2642 192642 1999 RD32 (radar) from Desert Moon Obs. (Jan. 7.45-46p3)
J0491 190491 2000 FJ10 (PMD) from Desert Moon Obs. (Jan. 7.23-25p3)
H5706 175706 1996 FG3 (PMD) from GiaGa Obs. (Jan. 7.96-99p2)
G3899 163899 2003 SD220 (PMD) from Desert Moon Obs. (Jan. 7.06-08p3)
D7799 137799 1999 YB (PMD) from Desert Moon Obs. (Jan. 7.12p1, 7.16p1 & 7.20p1)
-- Potential mission destinations list & ephemerides -- Planetary radar schedules: Arecibo & Goldstone
Observations of other objects
K12A01E 2012 AE1 (arc=6 days, H=18.8 ~589m) from ARO Westfield (Jan. 6.38-39p3 & 7.27-28p5) and LINEAR (Jan. 7.35-39p4)
K11Y62S 2011 YS62 (arc=9 days, H=19.7 ~389m) from ARO Westfield (Jan. 7.08-10p3)
K11Y15V 2011 YV15 (Q=4.467 AU, arc=13 days, H=17.1 ~1.29 km) from ARO Westfield (Jan. 6.48-49p4) and Desert Moon Obs. (Jan. 7.48-50p5)
K11Y06G 2011 YG6 (arc=14 days, H=21.0 ~214m) from ARO Westfield (Jan. 7.20-22p4)
K11Y01W 2011 YW1 (arc=20 days, H=19.7 ~389m) from ARO Westfield (Jan. 7.24p4)
K11X01E 2011 XE1 (arc=36 days, H=18.1 ~812m) from ARO Westfield (Jan. 6.26-27p3) and GiaGa Obs. (Jan. 8.03-05p2)
K11UP6E 2011 UE256 (Q=4.796 AU, arc=55 days, H=19.4 ~446m) from Schiaparelli Obs. (Dec. 23.80-83p2)
K11UA6U 2011 UU106 (arc=2 opp, H=18.7 ~616m) from Oukaimeden Obs. (Jan. 4.79-82p3 & 4.90p1)
K11SA2L 2011 SL102 (arc=3 opp, H=18.2 ~776m) from ARO Westfield (Jan. 7.12-15p6)
K11S69R 2011 SR69 (arc=104 days, H=20.1 ~323m) from ARO Westfield (Jan. 6.35-37p5)
K11F02Z 2011 FZ2 (Q=4.760 AU, arc=2 opp, H=17.3 ~1.17 km) from ARO Westfield (Jan. 6.13-14p3)
K09W06R 2009 WR6 (arc=3 opp, H=18.3 ~741m) from ARO Westfield (Jan. 7.05-06p4)
K08C70N 2008 CN70 (arc=3 opp, H=19.1 ~513m) from Holmes/CTIO (Jan. 7.34-36p10)
K07S06P 2007 SP6 (arc=3 opp, H=18.1 ~812m) from ARO Westfield (Jan. 7.07-08p4)
K06V13Y 2006 VY13 (Q=4.718 AU, arc=2 opp, H=17.3 ~1.17 km) from ARO Westfield (Jan. 6.43-44p5)
K05Y00S 2005 YS (q=0.320 AU, arc=3 opp, H=19.6 ~407m) from ARO Westfield (Jan. 7.06-07p3)
K05X04M 2005 XM4 (arc=3 opp, H=19.7 ~389m) from ARO Westfield (Jan. 7.08-11p6)
K05UF9J 2005 UJ159 (Q=6.129 AU, arc=2 opp, H=17.6 ~1.02 km) from ARO Westfield (Jan. 7.04-05p5)
K04Q17B 2004 QB17 (arc=3 opp, H=18.5 ~676m) from ARO Westfield (Jan. 7.07-08p4)
K04P27X 2004 PX27 (arc=3 opp, H=18.4 ~708m) from ARO Westfield (Jan. 7.15-17p4)
K03Y00J 2003 YJ (arc=2 opp, H=20.3 ~295m) from Schiaparelli Obs. (Dec. 23.87-89p2)
K03T02J 2003 TJ2 (arc=4 opp, H=19.0 ~537m) from Pan-STARRS 1 (PS1) (Jan. 6.40-41p2)
K03B01L 2003 BL1 (arc=4 opp, H=19.3 ~467m) from ARO Westfield (Jan. 6.46-48p6)
K02A11N 2002 AN11 (arc=3 opp, H=18.2 ~776m) from ARO Westfield (Jan. 6.39-40p3)
K02A01X 2002 AX1 (arc=6 opp, H=19.6 ~407m) from ARO Westfield (Jan. 6.41-42p4)
K00E14D 2000 ED14 (q=0.362 AU, arc=2 opp, H=20.8 ~234m) from Schiaparelli Obs. (Dec. 23.75-77p2)
K00C59E 2000 CE59 (arc=2 opp, H=20.4 ~282m) from Schiaparelli Obs. (Dec. 23.99p2)
U8635 308635 2005 YU55 (close passer) from TRAPPIST (Nov. 23.02-05p10)
Q2623 262623 2006 WY2 from GiaGa Obs. (Jan. 7.95-98p2)
G2980 162980 2001 RR17 from PS1 (Jan. 6.21p2)
F3951 153951 2002 AC3 from PS1 (Jan. 6.46-47p2)
E3651 143651 2003 QO104 from PS1 (Jan. 6.46-47p2)
E2348 142348 2002 RX211 from PS1 (Jan. 6.49-50p2)
D7671 137671 1999 XP35 from Desert Moon Obs. (Jan. 7.27-28p5)
D7064 137064 1998 WP5 from Desert Moon Obs. (Jan. 7.52-55p3)
36284 36284 2000 DM8 from LINEAR (Jan. 7.08-13p5)
03552 3552 Don Quixote (1983 SA) from PS1 (Jan. 6.39-41p2)
03352 3352 McAuliffe (1981 CW) from El Maestrat Obs. (Jan. 8.15-19p7)
03103 3103 Eger (1982 BB) from El Maestrat Obs. (Jan. 8.09-13p7)
01917 1917 Cuyo (1968 AA) from PS1 (Jan. 7.20-26p4)
01866 1866 Sisyphus (1972 XA) from Hamamatsu-Yuto Obs. (Jan. 7.39-40p8)

Observers on 8 January '12

Fourteen observers appear in today's MPECs.

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield in Illinois, 28 in MPEC 2012-A39 -- 2012 AY, 2012 AE1, 2011 YW15, 2011 YW1, 2011 YV15, 2011 YT62, 2011 YS62, 2011 YM63, 2011 YH40, 2011 YG6, 2011 YA, 2011 XE1, 2011 XC2, 2011 SR69, 2011 SL102, 2011 FZ2, 2009 WR6, 2007 SP6, 2006 VY13, 2005 YS, 2005 XM4, 2005 UJ159, 2004 QB17, 2004 PX27, 2003 BL1, 2002 BF25, 2002 AX1, 2002 AN11
`J51`	Atlante Obs. in the Canary Islands, 1 in MPEC 2012-A39 -- 2011 YA
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPEC 2012-A39 -- 2012 AB3, 2008 CN70
`448`	Desert Moon Obs. in New Mexico, 7 in MPEC 2012-A39 -- 2011 YV15, 192642, 190491, 163899, 137799, 137671, 137064
`J19`	El Maestrat Obs. in Spain, 2 in MPEC 2012-A39 -- 3352, 3103
`203`	GiaGa Obs. in Italy, 4 in MPEC 2012-A39 -- 2012 AY, 2011 XE1, 262623, 175706
`379`	Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2012-A39 -- 2011 YA, 1866
`704`	LINEAR in New Mexico, 3 in MPEC 2012-A39 -- 2012 AE1, 2011 YA, 36284
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-A40 -- 2011 EC7
`644`	NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2012-A39 -- 2001 YE4
`J43`	Oukaimeden Obs. in Morocco, 1 in MPEC 2012-A39 -- 2011 UU106
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 7 in MPEC 2012-A39 -- 2003 TJ2, 162980, 153951, 143651, 142348, 3552, 1917
`204`	Schiaparelli Obs. in Italy, 4 in MPEC 2012-A39 -- 2011 UE256, 2003 YJ, 2000 ED14, 2000 CE59
`I40`	TRAPPIST in Chile, 1 in MPEC 2012-A39 -- 308635

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

Impact Risk Monitoring on 8 January '12

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2300 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	JPL Sentry	2300	2079	1	1.6e-09	-6.42	-6.42	0	JPL: "Analysis based on 43 observations spanning 9.8969 days (2011-Dec-27.41812 to 2012-Jan-06.31497)." Diameter approximately 0.310 km. from mean, weighted H=20.2.

2011 XC2	JPL Sentry	2300	2056	1	4.9e-06	-4.03	-4.03	0	JPL: "Analysis based on 33 observations spanning 22.188 days (2011-Dec-08.19806 to 2011-Dec-30.386484)." Diameter approximately 0.086 km. from mean, weighted H=23.0.
2011 XC2	NEODyS	1700	2056-2084	3	5.71e-06	-3.96	-3.96	0	NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2011-12-08.199 to 2011-12-30.387."

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 8 January '12

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

2300	Noted that JPL Sentry has updated its 2011 XC2 risk assessment - see above Noted that JPL Sentry has updated its 2011 YH28 risk assessment - see above
2014	Grabbed MPEC 2012-A39 - Daily Orbit Update - see above Grabbed MPEC 2012-A40 - 2011 EC7 - see above
1700	Noted that NEODyS has updated its 2011 XC2 risk assessment - see above

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