2012-01-05 Tracking News

Contents on 5 January '12

IAU Minor Planet Center
- NEOCP Activity -- six listings
- New MPECs -- seven MPECs
Observers -- 22 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 1718 UTC on 5 Jan.
Earth's Busy Neighborhood close passer Traffic Report
Three objects are known to be within ten LD of Earth today. Updated at 1837 UTC on 5 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.

NEOCP Activity on 5 January '12

The MPC's NEO Confirmation Page has 6 listings

When last checked at 2207 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had six objects listed. So far The Tracking News has counted a total of fourteen 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 5 January '12

Minor Planet Electronic Circulars

As of last check at 2207 UTC, there have been seven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2012-A29 time-stamped "06:04 UT" - Daily Orbit Update - see below
MPEC 2012-A30 time-stamped "10:39 UT" - 1996 AE2 - see below
MPEC 2012-A31 time-stamped "12:11 UT" - 2012 AD3 - see below
MPEC 2012-A32 time-stamped "12:13 UT" - 2012 AE3 - see below
MPEC 2012-A33 time-stamped "12:15 UT" - 2012 AF3 - see below
MPEC 2012-A34 time-stamped "15:33 UT" - 2006 HV57 - see below
MPEC 2012-A35 time-stamped "21:16 UT" - Comet C/2012 A1 (Panstarrs)

MPEC 2012-A35 - "21:16 UT" - Comet C/2012 A1 (Panstarrs)

CK12A010 C/2012 A1 (Panstarrs) (i=118.9°, q=6.882 AU, TP=2014 Mar. 11.89301 TT) from Pan-STARRS 1 (PS1) (Jan. 2.45-46p2), the Spacewatch 1.8m telescope (Jan. 3.45-46p3, 4.52-54p3 & 5.44-45p3), Nerpio Obs. (Jan. 4.16p3 & 5.19-20p3), Astronomical Research Obs. Westfield (Jan. 5.30-31p3), Sandlot Obs. (Jan. 5.42-44p3), and Paul Roche via Faulkes Telescope North (Jan. 5.59p3)

MPEC 2012-A34 - "15:33 UT" - 2006 HV57

K06H57V 2006 HV57 (Q=4.323 AU, H=18.5 ~676m) from David Tholen's team on Mauna Kea (2010 April 2.45p1 at R=24.2 & Dec. 15.33-34p3 at R=23.0-4) and ARO Westfield (Nov. 5.28-35p5 at V=21.0-22.8)

MPEC 2012-A33 - "12:15 UT" - 2012 AF3

K12A03F 2012 AF3 (small asteroid, Earth MOID=7.4 LD, H=24.7 ~39m) from the Mt. Lemmon Survey (MLS) (Jan. 4.41-50p12), Spacewatch 1.8m (Jan. 4.47p3 & 5.46p3), and ARO Westfield (Jan. 5.27-29p3)

MPEC 2012-A32 - "12:13 UT" - 2012 AE3

K12A03E 2012 AE3 (i=40.7°, H=20.0 ~339m) from MLS (Jan. 3.31-33p3, 3.46-47p4 & 4.37-38p3), McGraw-Hill Telescope (Jan. 3.45p4), Spacewatch 1.8m (Jan. 4.20-21p3 & 5.40-41p2), and ARO Westfield (Jan. 5.29-31p3)

MPEC 2012-A31 - "12:11 UT" - 2012 AD3

K12A03D 2012 AD3 (H=19.5 ~426m) from MLS (Jan. 2.35-37p4 & 2.47-50p4), Spacewatch 1.8m (Jan. 2.49-50p3, 3.25p3, 4.22p3 & 5.45-46p3), and ARO Westfield (Jan. 3.38-41p3 & 5.31-33p3)

MPEC 2012-A30 - "10:39 UT" - 1996 AE2

J96A02E 1996 AE2 (i=37.4°, H=20.0 ~339m) from LINEAR (Jan. 4.41-46p5), Los Campitos Obs. (Jan. 5.17-20p3), Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Jan. 5.26-27p9), ISON-NM Obs. (Jan. 5.37p2), and Sandlot Obs. (Jan. 5.37-39p3)

<< DOU on 5 Jan. '12 >> MPEC 2012-A29 - "06:04 UT" - Daily Orbit Update

Observations of risk-listed objects
K11Y28H 2011 YH28 (Q=4.434 AU, arc=8 days, H=20.2 ~309m) from Spacewatch 1.8m (Jan. 4.39p3)
K11W02L 2011 WL2 (arc=50 days, H=20.8 ~234m) from Spacewatch 1.8m (Jan. 5.18-19p3)
Observations of recently (no longer) risk-listed objects
K11Y00A 2011 YA (arc=19 days, H=18.6 ~645m) from Wishing Star Obs. (Jan. 4.12p3) and Betelgeuse Station (Jan. 4.89-90p5)
K11X01M 2011 XM1 (Q=4.432 AU, arc=31 days, H=20.0 ~339m) from Spacewatch 1.8m (Jan. 4.50-51p3)
Observations of small asteroids (H>22.0)
K11Y63M 2011 YM63 (arc=4 days, H=22.3 ~117m) from Spacewatch 1.8m (Jan. 4.27p3)
K11Y40H 2011 YH40 (arc=6 days, H=22.9 ~89m, close passer, radar support) from Ka-Dar Obs. TAU Station (Jan. 3.71-72p4) and Petit Jean Mtn. South Obs. (PJMSO) (Jan. 4.31-42p35)
K11Y29C 2011 YC29 (arc=6 days, H=22.2 ~123m) from Spacewatch 1.8m (Jan. 4.25-26p2)
K11W95V 2011 WV95 (arc=35 days, H=24.2 ~49m) from Spacewatch 1.8m (Jan. 4.39p3)
K04V61B 2004 VB61 (arc=31 days, H=22.1 ~129m) from the Sloan Digital Sky Survey (SDSS) (2004 Nov. 10.30p4)
Observations of potential mission destinations (PMDs)
H5706 175706 1996 FG3 (PMD) from Thousand Oaks Obs. (Jan. 4.34-37p3)
D8911 138911 2001 AE2 (PMD) from MLS (Jan. 4.44-47p4)
-- Potential mission destinations list & ephemerides -- Planetary radar schedules: Arecibo & Goldstone
Observations of other objects
K11Y62S 2011 YS62 (arc=7 days, H=19.7 ~389m) from Spacewatch 1.8m (Jan. 5.21p3)
K11Y10Q 2011 YQ10 (arc=11 days, H=18.8 ~589m) from Spacewatch 1.8m (Jan. 4.27-28p3)
K11Y06H 2011 YH6 (arc=11 days, H=21.7 ~155m) from the Spacewatch 0.9m telescope (Jan. 4.28-32p3)
K11Y06G 2011 YG6 (arc=11 days, H=21.0 ~214m) from Wishing Star Obs. (Jan. 4.02-03p3)
K11Y01W 2011 YW1 (arc=17 days, H=19.7 ~389m) from Wishing Star Obs. (Jan. 4.13-14p3)
K11SA2L 2011 SL102 (arc=3 opp, H=18.2 ~776m) from Wishing Star Obs. (Jan. 3.99p3) and the Catalina Sky Survey (CSS) (Jan. 4.19-21p5)
K11S25F 2011 SF25 (arc=106 days, H=21.2 ~195m) from Spacewatch 1.8m (Jan. 4.45-46p3)
K10F00Q 2010 FQ (arc=2 opp, H=20.0 ~339m) from Spacewatch 1.8m (Jan. 4.51-52p3)
K10C19L 2010 CL19 (arc=3 opp, H=17.6 ~1.02 km) from TAU Sta. (Jan. 3.67-68p4) and CSS (Jan. 4.09-11p4)
K08W13Z 2008 WZ13 (arc=2 opp, H=18.5 ~676m) from Wishing Star Obs. (Jan. 4.05-06p3)
K08B02S 2008 BS2 (arc=4 opp, H=18.1 ~812m) from Spacewatch 0.9m (Jan. 4.40-43p3)
K06N00M 2006 NM (Q=4.494 AU, arc=3 opp, H=16.3 ~1.86 km) from MLS (Jan. 4.28-31p4)
K06BD9X 2006 BX139 (arc=116 days, H=20.0 ~339m) from SDSS (2006 May 26.18p2)
K05Y36Y 2005 YY36 (arc=3 opp, H=19.5 ~426m) from SDSS (2006 May 1.25p4)
K05T15R 2005 TR15 (arc=3 opp, H=19.0 ~537m) from SDSS (2008 Oct. 9.40p4)
K05S04X 2005 SX4 (Q=4.297 AU, arc=103 days, H=20.3 ~295m) from SDSS (2005 Oct. 12.43p4)
K04X35M 2004 XM35 (arc=2 opp, H=19.7 ~389m) from SDSS (2004 Dec. 12.17-18p4)
K04T11U 2004 TU11 (arc=2 opp, H=21.1 ~204m) from SDSS (2004 Nov. 5.24p4)
K04R25S 2004 RS25 (arc=3 opp, H=20.2 ~309m) from SDSS (2004 Oct. 10.33-34p4)
K03A18K 2003 AK18 (arc=4 opp, H=19.7 ~389m) from Wishing Star Obs. (Jan. 3.97-98p3) and CSS (Jan. 4.19-21p5)
K02T30N 2002 TN30 (arc=3 opp, H=16.8 ~1.48 km) from SDSS (2009 Oct. 15.20p4)
K01W15L 2001 WL15 (arc=5 opp, H=18.2 ~776m) from SDSS (2002 March 31.42-43p4)
K01V75J 2001 VJ75 (Q=4.288 AU, arc=93 days, H=19.8 ~371m) from SDSS (2001 Dec. 18.34-35p4)
K01F00Z 2001 FZ (arc=210 days, H=21.0 ~214m) from SDSS (2001 Feb. 22.44-45p3)
U7493 307493 2002 XP90 from CSS (Jan. 4.37-39p4)
U3174 303174 2004 FH11 from SDSS (2004 Nov. 4.19p4)
S5625 285625 2000 RD34 from MLS (Jan. 4.18-20p4)
N7805 237805 2002 CF26 from CSS (Jan. 4.37-39p4)
L9071 219071 1997 US9 from CSS (Jan. 4.11-13p4)
H5114 175114 2004 QQ from Spacewatch 0.9m (Jan. 4.24-27p3)
G3696 163696 2003 EB50 from CSS (Jan. 4.13-15p4)
G2142 162142 1998 VR from MLS (Jan. 4.12-14p4)
F9857 159857 2004 LJ1 from LINEAR (Jan. 4.42-46p4)
D8155 138155 2000 ES70 from SDSS (2003 Aug. 22.13p2)
D6770 136770 1996 PC1 from SDSS (2001 Sept. 20.11p4)
99799 99799 2002 LJ3 from CSS (Jan. 4.32-36p3)
19764 19764 2000 NF5 from Spacewatch 0.9m (Jan. 4.24-27p3)
16816 16816 1997 UF9 from CSS (Jan. 4.16-18p4)
09400 9400 1994 TW1 from CSS (Jan. 4.47-50p4)
03554 3554 Amun (1986 EB) from CSS (Jan. 4.47-50p4)
02368 2368 Beltrovata (1977 RA) from Spacewatch 0.9m (Jan. 4.23-27p6) and CSS (Jan. 4.25-27p4)
02061 2061 Anza (1960 UA) from CSS (Jan. 4.09-11p3)
01866 1866 Sisyphus (1972 XA) from CSS (Jan. 4.14-15p4)
01627 1627 Ivar (1929 SH) from Ourense Obs. (Dec. 26.94p1, 26.99p1, 30.90p1 & 30.96p1)
01620 1620 Geographos (1951 RA) from Wishing Star Obs. (Jan. 4.00-01p3)

Observers on 5 January '12

A total of 22 observers appear in today's MPECs.

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield in Illinois, 5 in MPECs 2012-A31, 2012-A32, 2012-A33, 2012-A34 & 2012-A35 -- 2012 AF3, 2012 AE3, 2012 AD3, C/2012 A1, 2006 HV57
`B75`	Betelgeuse Station in Italy, 1 in MPEC 2012-A29 -- 2011 YA
`703`	Catalina Sky Survey (CSS) in Arizona, 14 in MPEC 2012-A29 -- 2011 SL102, 2010 CL19, 2003 AK18, 99799, 307493, 237805, 219071, 16816, 163696, 9400, 3554, 2368, 2061, 1866
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2012-A30 -- 1996 AE2
`F657`	Paul Roche in Wales via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-A35 -- C/2012 A1
`H15`	ISON-NM Obs. in New Mexico, 1 in MPEC 2012-A30 -- 1996 AE2
`C32`	Ka-Dar Obs. TAU Station in Russia, 2 in MPEC 2012-A29 -- 2011 YH40, 2010 CL19
`704`	LINEAR in New Mexico, 2 in MPECs 2012-A29 & 2012-A30 -- 1996 AE2, 159857
`I36`	Los Campitos Obs. in Argentina, 1 in MPEC 2012-A30 -- 1996 AE2
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-A34 -- 2006 HV57
`697`	McGraw-Hill Telescope in Arizona, 1 in MPEC 2012-A32 -- 2012 AE3
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2012-A29, 2012-A31, 2012-A32 & 2012-A33 -- 2012 AF3, 2012 AE3, 2012 AD3, 2006 NM, 285625, 162142, 138911
`I89`	Nerpio Obs. in Italy, 1 in MPEC 2012-A35 -- C/2012 A1
`I61`	Ourense Obs., 1 in MPEC 2012-A29 -- 1627
`F51`	Pan-STARRS 1 in Hawaii, 1 in MPEC 2012-A35 -- C/2012 A1
`H45`	Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2012-A29 -- 2011 YH40
`H36`	Sandlot Obs. in Kansas, 2 in MPECs 2012-A30 & 2012-A35 -- C/2012 A1, 1996 AE2
`645`	Sloan Digital Sky Survey (SDSS) in New Mexico, 15 in MPEC 2012-A29 -- 2006 BX139, 2005 YY36, 2005 TR15, 2005 SX4, 2004 XM35, 2004 VB61, 2004 TU11, 2004 RS25, 2002 TN30, 2001 WL15, 2001 VJ75, 2001 FZ, 303174, 138155, 136770
`691`	Spacewatch 0.9m telescope in Arizona, 5 in MPEC 2012-A29 -- 2011 YH6, 2008 BS2, 19764, 175114, 2368
`291`	Spacewatch 1.8m telescope in Arizona, 14 in MPECs 2012-A29, 2012-A31, 2012-A32, 2012-A33 & 2012-A35 -- 2012 AF3, 2012 AE3, 2012 AD3, C/2012 A1, 2011 YS62, 2011 YQ10, 2011 YM63, 2011 YH28, 2011 YC29, 2011 XM1, 2011 WV95, 2011 WL2, 2011 SF25, 2010 FQ
`G69`	Thousand Oaks Obs. in southern California, 1 in MPEC 2012-A29 -- 175706
`I15`	Wishing Star Obs. in Rhode Island, 7 in MPEC 2012-A29 -- 2011 YW1, 2011 YG6, 2011 YA, 2011 SL102, 2008 WZ13, 2003 AK18, 1620

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

Impact Risk Monitoring on 5 January '12

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2207 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	1717	2079	1	3.1e-07	-4.14	-4.14	0	JPL: "Analysis based on 34 observations spanning 7.9701 days (2011-Dec-27.41812 to 2012-Jan-04.38819)." Diameter approximately 0.310 km. from mean, weighted H=20.2.

2011 WL2	JPL Sentry	1717	2098	1	6.8e-07	-4.36	-4.36	0	JPL: "Analysis based on 192 observations spanning 49.869 days (2011-Nov-16.31883 to 2012-Jan-05.18819)." Diameter approximately 0.240 km. from mean, weighted H=20.7.

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 5 January '12

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

2207

Grabbed MPEC 2012-A35 - Comet C/2012 A1 (Panstarrs) - see above

1717

Noted that JPL Sentry has updated its 2011 WL2 risk assessment - see above
Noted that JPL Sentry has updated its 2011 YH28 risk assessment - see above
Grabbed MPEC 2012-A29 - Daily Orbit Update - see above
Grabbed MPEC 2012-A30 - 1996 AE2 - see above
Grabbed MPEC 2012-A31 - 2012 AD3 - see above
Grabbed MPEC 2012-A32 - 2012 AE3 - see above
Grabbed MPEC 2012-A33 - 2012 AF3 - see above
Grabbed MPEC 2012-A34 - 2006 HV57 - see above

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