2012-01-04 Tracking News

Contents on 4 January '12

Radar Astrometry -- one object
IAU Minor Planet Center
- NEOCP Activity -- 13 listings
- New MPECs -- four MPECs
Observers -- eighteen observers
Impact Risk Monitoring -- one object
Chronology

Resources:

Consolidated Risk Tables - the CRT page (archive)
Of 426 risk-listed objects, 24 have had news in the last 31 days. Updated at 1805 UTC on 4 Jan.
Earth's Busy Neighborhood close passer Traffic Report
Four objects are known to be within ten LD of Earth today. Updated at 1907 UTC on 4 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 20 Dec.

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.

Radar Astrometry on 4 January '12

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:

Data update noted at 2359 UTC when the database was dated 4 Jan.

2000 YA from Goldstone DSS-14 70m antenna (Dec. 26.65 range) - see links

Photometry is needed for upcoming radar targets and also some astrometry. See Arecibo and Goldstone schedules.

NEOCP Activity on 4 January '12

The MPC's NEO Confirmation Page has 13 listings

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

New MPECs on 4 January '12

Minor Planet Electronic Circulars

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

MPEC 2012-A25 time-stamped "06:03 UT" - Daily Orbit Update - see below
MPEC 2012-A26 time-stamped "18:22 UT" - 2012 AA3 - see below
MPEC 2012-A27 time-stamped "20:14 UT" - 2012 AB3 - see below
MPEC 2012-A28 time-stamped "22:37 UT" - 2012 AC3

MPEC 2012-A28 - "22:37 UT" - 2012 AC3

K12A03C 2012 AC3 (small asteroid, H=23.0 ~85m) from the Catalina Sky Survey (CSS) (Jan. 3.13-14p4), Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) (Jan. 3.19p3), Astronomical Research Obs. Westfield (Jan. 3.25-26p3), Paus Obs. (Jan. 3.80-81p3), Great Shefford Obs. (Jan. 3.84-85p3), the Mt. Lemmon Survey (MLS) (Jan. 4.24p4), the Spacewatch 1.8m telescope (Jan. 4.29p3), Mandi Obs. (Jan. 4.85p2), and New Millennium Obs. (Jan. 4.85p2)

MPEC 2012-A27 - "20:14 UT" - 2012 AB3

K12A03B 2012 AB3 (small asteroid, H=24.0 ~54m) from CSS (Jan. 3.34-36p4 & 3.40p3), ARO Westfield (Jan. 3.42-43p3), and Spacewatch 1.8m (Jan. 4.47p3)

MPEC 2012-A26 - "18:22 UT" - 2012 AA3

K12A03A 2012 AA3 (small asteroid, H=22.4 ~112m) from MLS (Jan. 2.48-50p4), Spacewatch 1.8m (Jan. 3.24p3 & 4.22-23p3), and ARO Westfield (Jan. 3.33-35p2)

<< DOU on 4 Jan. '12 >> MPEC 2012-A25 - "06:03 UT" - Daily Orbit Update

Observations of risk-listed objects
K11Y28H 2011 YH28 (Q=4.435 AU, arc=7 days, H=20.2 ~309m) from ARO Westfield (Jan. 3.37-38p3) and Spacewatch 1.8m (Jan. 3.52-53p3)
Observations of recently (no longer) risk-listed objects
K11Y28J 2011 YJ28 (arc=7 days, H=21.0 ~214m) from ARO Westfield (Jan. 3.38-39p5)
K11Y00A 2011 YA (arc=18 days, H=18.7 ~616m) from ARO Westfield (Jan. 3.32-34p6) and Paus Obs. (Jan. 3.83-84p3)
K11X01Z 2011 XZ1 (arc=28 days, H=17.5 ~1.07 km) from MLS (Jan. 3.17-19p4)
K11X01M 2011 XM1 (Q=4.432 AU, arc=30 days, H=20.0 ~339m) from Spacewatch 1.8m (Jan. 3.46-47p3)
Observations of small asteroids (H>22.0)
K12A00Q 2012 AQ (arc=2 days, H=30.7 ~2m, close passer) from Spacewatch 1.8m (Jan. 3.41p3)
K11Y62Z 2011 YZ62 (arc=3 days, H=25.7 ~25m) from Spacewatch 1.8m (Jan. 3.42p3)
K11Y62Y 2011 YY62 (Q=4.109 AU, arc=3 days, H=22.9 ~89m) from ARO Westfield (Jan. 3.28-29p3)
K11Y62T 2011 YT62 (arc=5 days, H=22.3 ~117m, close passer) from ARO Westfield (Jan. 3.30-31p3)
K11Y40H 2011 YH40 (arc=6 days, H=22.7 ~98m, close passer, radar support) from ARO Westfield (Jan. 3.31-32p4) and Paus Obs. (Jan. 3.94-95p3)
K11Y29C 2011 YC29 (arc=5 days, H=22.3 ~117m) from Spacewatch 1.8m (Jan. 3.54p2)
K11Y29B 2011 YB29 (Q=4.271 AU, arc=5 days, H=23.7 ~62m) from ARO Westfield (Jan. 3.33p3)
K11Y28L 2011 YL28 (arc=7 days, H=25.0 ~34m, close passer) from Great Shefford Obs. (Jan. 3.86p3)
K11Y28K 2011 YK28 (arc=6 days, H=23.6 ~65m) from Spacewatch 1.8m (Jan. 3.32-33p3)
K11Y15W 2011 YW15 (arc=7 days, H=24.6 ~41m, close passer) from ARO Westfield (Jan. 3.45p6)
K11Y06K 2011 YK6 (arc=2 days, H=23.4 ~71m) from DGRO-RH (Dec. 25.23-24p3)
K11A03C 2011 AC3 (arc=2 opp, H=22.4 ~112m) from Desert Moon Obs. (Jan. 3.47-51p3)
Observation campaigns for radar support & potential mission destinations (PMDs)
J0491 190491 2000 FJ10 (PMD) from CSS (Jan. 3.17-19p4)
H5706 175706 1996 FG3 (PMD) from LINEAR (Dec. 30.15-19p4)
07753 7753 1988 XB (PMD) from CSS (Jan. 3.09-10p3)
07341 7341 1991 VK (radar) from LINEAR (Nov. 22.13-18p3)
-- Potential mission destinations list & ephemerides -- Planetary radar schedules: Arecibo & Goldstone
Observations of other objects
K11Y62U 2011 YU62 (Q=4.790 AU, arc=4 days, H=17.5 ~1.07 km) from Cruz del Sur Obs. (Dec. 31.06-11p3)
K11Y40B 2011 YB40 (Q=4.055 AU, arc=6 days, H=19.2 ~490m) from ARO Westfield (Jan. 3.47-49p5)
K11Y28Y 2011 YY28 (Q=5.711 AU, arc=6 days, H=21.3 ~186m) from Spacewatch 1.8m (Jan. 3.30-31p3)
K11Y28G 2011 YG28 (Q=4.538 AU, arc=7 days, H=21.5 ~170m) from DGRO-RH (Dec. 29.25p2) and Desert Moon Obs. (Jan. 3.41-44p4)
K11Y15V 2011 YV15 (Q=4.478 AU, arc=9 days, H=17.1 ~1.29 km) from ARO Westfield (Jan. 3.46-47p8)
K11Y06L 2011 YL6 (arc=10 days, H=21.3 ~186m) from ARO Westfield (Jan. 3.34-35p4)
K11Y06H 2011 YH6 (arc=10 days, H=21.7 ~155m) from ARO Westfield (Jan. 3.35-36p3) and Desert Moon Obs. (Jan. 3.36-39p3)
K11Y06E 2011 YE6 (Q=4.861 AU, arc=34 days, H=20.8 ~234m) from Desert Moon Obs. (Jan. 3.17-19p3)
K11X01E 2011 XE1 (arc=31 days, H=18.1 ~812m) from ARO Westfield (Jan. 3.36-38p7)
K11U63S 2011 US63 (Q=5.390 AU, arc=75 days, H=18.0 ~851m) from ARO Westfield (Jan. 4.01-02p5)
K11S25F 2011 SF25 (arc=105 days, H=21.2 ~195m) from Spacewatch 1.8m (Jan. 3.53p3)
K11O15R 2011 OR15 (arc=161 days, H=21.1 ~204m) from ARO Westfield (Jan. 3.39-41p3 at V=21.9-22.2)
K11L19C 2011 LC19 (Q=5.550 AU, arc=2 opp, H=18.9 ~562m) from CSS (Jan. 3.14-16p4)
K11G03H 2011 GH3 (Q=4.241 AU, arc=2 opp, H=18.5 ~676m) from MLS (Jan. 3.20-22p3)
K10S16O 2010 SO16 (arc=2 opp, H=20.6 ~257m) from Spacewatch 1.8m (Jan. 4.14p3)
K10L33R 2010 LR33 (arc=3 opp, H=18.2 ~776m) from Spacewatch 1.8m (Jan. 3.48-51p3)
K10C19L 2010 CL19 (arc=3 opp, H=17.6 ~1.02 km) from Pan-STARRS 1 (PS1) (2011 May 30.26-27p3) and ARO Westfield (Jan. 4.00-02p4)
K06M10J 2006 MJ10 (i=39.3°, arc=4 opp, H=18.7 ~616m) from Hadano Obs. (Jan. 2.70-71p4)
K06BE8A 2006 BA148 (arc=4 opp, H=18.3 ~741m) from Hadano Obs. (Jan. 2.72-73p4)
K05N01J 2005 NJ1 (arc=5 opp, H=18.5 ~676m) from MLS (Jan. 3.09-11p4)
K04F32C 2004 FC32 (arc=6 opp, H=18.6 ~645m) from ARO Westfield (Jan. 3.47-49p3 at V=21.9-22.2)
K02Q24G 2002 QG24 (arc=4 opp, H=17.8 ~933m) from the Spacewatch 0.9m telescope (Jan. 3.47-50p3)
K02A11N 2002 AN11 (arc=3 opp, H=18.2 ~776m) from CSS (Jan. 3.30-33p4)
U8127 308127 2004 XM130 from Desert Moon Obs. (Jan. 3.53-54p5)
R5558 275558 1999 RH33 from CSS (Jan. 3.34-37p4)
F9857 159857 2004 LJ1 from CSS (Jan. 3.41-42p3)
F5110 155110 2005 TB from CSS (Jan. 3.21-23p4)
F4656 154656 2004 FE3 from LINEAR (Nov. 23.06-11p4)
E1056 141056 2001 XV4 from LINEAR (Nov. 28.36-39p4)
D8524 138524 2000 OJ8 from CSS (Jan. 3.31-33p4)
D8013 138013 2000 CN101 from CSS (Jan. 3.31-33p4)
85709 85709 1998 SG36 from LINEAR (Nov. 16.32-38p5)
66251 66251 1999 GJ2 from CSS (Jan. 3.34-36p4)
54071 54071 2000 GQ146 from LINEAR (Nov. 18.15-20p4)
29075 29075 1950 DA from CSS (Jan. 3.24-26p4)
25916 25916 2001 CP44 from Spacewatch 0.9m (Jan. 3.19-23p3)
08567 8567 1996 HW1 from El Maestrat Obs. (Jan. 3.91-94p7)
03200 3200 Phaethon (1983 TB) from David Tholen's team on Mauna Kea (Nov. 24.43-44p7)
02061 2061 Anza (1960 UA) from CSS (Jan. 3.08-10p4)
01943 1943 Anteros (1973 EC) from LINEAR (Dec. 29.07p1 & 29.12p1)
01627 1627 Ivar (1929 SH) from LINEAR (Nov. 22.44-49p5)
01620 1620 Geographos (1951 RA) from El Maestrat Obs. (Jan. 3.84-89p7)

Observers on 4 January '12

Eighteen observers appear in today's MPECs.

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield in Illinois, 20 in MPECs 2012-A25, 2012-A26, 2012-A27 & 2012-A28 -- 2012 AC3, 2012 AB3, 2012 AA3, 2011 YY62, 2011 YW15, 2011 YV15, 2011 YT62, 2011 YL6, 2011 YJ28, 2011 YH6, 2011 YH40, 2011 YH28, 2011 YB40, 2011 YB29, 2011 YA, 2011 XE1, 2011 US63, 2011 OR15, 2010 CL19, 2004 FC32
`703`	Catalina Sky Survey (CSS) in Arizona, 14 in MPECs 2012-A25, 2012-A27 & 2012-A28 -- 2012 AC3, 2012 AB3, 2011 LC19, 2002 AN11, 66251, 29075, 275558, 190491, 159857, 155110, 138524, 138013, 7753, 2061
`I39`	Cruz del Sur Obs. in Argentina, 1 in MPEC 2012-A25 -- 2011 YU62
`448`	Desert Moon Obs. in New Mexico, 5 in MPEC 2012-A25 -- 2011 YH6, 2011 YG28, 2011 YE6, 2011 AC3, 308127
`G48`	Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 3 in MPECs 2012-A25 & 2012-A28 -- 2012 AC3, 2011 YK6, 2011 YG28
`J19`	El Maestrat Obs. in Spain, 2 in MPEC 2012-A25 -- 8567, 1620
`253`	Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 2000 YA
`J95`	Great Shefford Obs. in England, 2 in MPECs 2012-A25 & 2012-A28 -- 2012 AC3, 2011 YL28
`355`	Hadano Obs. in Japan, 2 in MPEC 2012-A25 -- 2006 MJ10, 2006 BA148
`704`	LINEAR in New Mexico, 8 in MPEC 2012-A25 -- 85709, 54071, 175706, 154656, 141056, 7341, 1943, 1627
`B28`	Mandi Obs. in Italy, 1 in MPEC 2012-A28 -- 2012 AC3
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-A25 -- 3200
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2012-A25, 2012-A26 & 2012-A28 -- 2012 AC3, 2012 AA3, 2011 XZ1, 2011 GH3, 2005 NJ1
`A24`	New Millennium Obs. in Italy, 1 in MPEC 2012-A28 -- 2012 AC3
`F51`	Pan-STARRS 1 in Hawaii, 1 in MPEC 2012-A25 -- 2010 CL19
`B49`	Paus Obs. in Spain, 3 in MPECs 2012-A25 & 2012-A28 -- 2012 AC3, 2011 YH40, 2011 YA
`691`	Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2012-A25 -- 2002 QG24, 25916
`291`	Spacewatch 1.8m telescope in Arizona, 13 in MPECs 2012-A25, 2012-A26, 2012-A27 & 2012-A28 -- 2012 AQ, 2012 AC3, 2012 AB3, 2012 AA3, 2011 YZ62, 2011 YY28, 2011 YK28, 2011 YH28, 2011 YC29, 2011 XM1, 2011 SF25, 2010 SO16, 2010 LR33

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

Impact Risk Monitoring on 4 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	JPL Sentry	1804	2029-2079	4	2.4e-07	-4.25	-4.25	0	JPL: "Analysis based on 31 observations spanning 7.1088 days (2011-Dec-27.41812 to 2012-Jan-03.52689)." Diameter approximately 0.310 km. from mean, weighted H=20.2.
2011 YH28	NEODyS	1804	2029-2079	4	2.12e-07	-4.30	-4.3	0	NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2011-12-27.419 to 2012-01-03.528."

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 4 January '12

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

2359	Noted Radar Astrometry database update - see above
2240	Grabbed MPEC 2012-A28 - 2012 AC3 - see above
2100	Grabbed MPEC 2012-A27 - 2012 AB3 - see above
1848	Grabbed MPEC 2012-A26 - 2012 AA3 - see above
1804	Noted that JPL Sentry has updated its 2011 YH28 risk assessment - see above Noted that NEODyS has updated its 2011 YH28 risk assessment - see above Grabbed MPEC 2012-A25 - Daily Orbit Update - see above

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