2010-02-20 Tracking News

Contents on 20 February '10

IAU Minor Planet Center
- NEOCP Activity -- eight listings: 1 new, 7 updated
- New MPECs -- two MPECs
Observers -- eighteen observing facilities
Impact Risk Monitoring -- eight objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page
Earth's Busy Neighborhood Traffic Report
Ephemerides for risk-rated and nearby objects
News image catalog
Old & new CRT Archive
Old News Archive & Small Objects Archive

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 20 February '10

The MPC's NEO Confirmation Page has 8 listings: 1 new, 7 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and seven updated listings. So far The Tracking News has counted a total of twelve listings on the NEOCP at some point 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 20 February '10

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-D56 time-stamped "07:22 UT" - Daily Orbit Update - see below
MPEC 2010-D57 time-stamped "15:00 UT" - 2010 DE2

MPEC 2010-D57 - "15:00 UT" - 2010 DE2

K10D02E 2010 DE2 (small asteroid, Earth MOID=1.6 LD, H=26.5 ~17m) was discovered at 0600 UT on 20 Feb. by the Catalina Sky Survey (CSS), which observed it at Feb. 20.25-27p4 and 20.32-34p11. The discovery was confirmed by Sabino Canyon Obs. (Feb. 20.42p3) and Tenagra II Obs. (Feb. 20.51p3). This object is now within ten lunar distances (LD) of Earth, reaching 3.9 LD on 23 Feb.

<< DOU on 20 Feb. '10 >> MPEC 2010-D56 - "07:22 UT" - Daily Orbit Update

Observations of risk-listed objects
K10D01W 2010 DW1 (arc=3 days, H=19.2 ~490m) from Great Shefford Obs. (Feb. 20.21-22p3)
K10D01G 2010 DG1 (small asteroid, arc=2 days, H=24.5 ~43m) from Astronomical Research Obs. Westfield (ARO Westfield) (Feb. 19.30-32p3) and the Spacewatch 1.8m telescope (Feb. 19.31p2)
K10D00M 2010 DM (q=0.338 AU, arc=3 days, H=19.0 ~537m) from Spacewatch 1.8m (Feb. 19.28-29p3)
K10C55H 2010 CH55 (arc=4 days, H=19.6 ~407m) from Spacewatch 1.8m (Feb. 19.36p3)
K10C44N 2010 CN44 (Q=5.697 AU, arc=4 days, H=19.2 ~490m) from ARO Westfield (Feb. 19.02-04p3) and Spacewatch 1.8m (Feb. 19.16-17p3)
K10C19Q 2010 CQ19 from the Mt. Lemmon Survey (MLS) (Feb. 19.32-34p4 at V=20.9-22.2)
K10C19G 2010 CG19 (i=62.9°, arc=5 days, H=19.5 ~426m) from ARO Westfield (Feb. 19.27-28p3) and Spacewatch 1.8m (Feb. 19.40-41p3)
K10C00A 2010 CA (small asteroid, arc=9 days, H=24.5 ~43m) from Schiaparelli Obs. (Feb. 12.99-00p2)
Observations of recently (no longer) risk-listed objects
K10D01J 2010 DJ1 (small asteroid, arc=3 days, H=26.9 ~14m) from ARO Westfield (Feb. 19.28-29p3), Tenagra II Obs. (Feb. 19.28-29p3), Magdalena Ridge Obs. (MRO) (Feb. 19.29-31p4), Spacewatch 1.8m (Feb. 19.38p3), and Great Shefford Obs. (Feb. 19.92-94p3)
K10D01H 2010 DH1 (arc=2 days, H=19.5 ~426m) from ARO Westfield (Feb. 19.24-27p3 at V=21.9-22.4)
K10D00P 2010 DP (i=36.4°, arc=3 days, H=18.5 ~676m) from Spacewatch 1.8m (Feb. 19.42-43p3)
K10C19F 2010 CF19 (almost small, arc=5 days, H=21.9 ~141m) from ARO Westfield (Feb. 19.12-13p3) and Tenagra II Obs. (Feb. 19.21-22p3)
K10C19D 2010 CD19 (arc=5 days, H=18.1 ~812m) from Desert Moon Obs. (Feb. 19.09-10p5)
K10B02U 2010 BU2 (small asteroid, arc=29 days, H=24.5 ~43m) from ARO Westfield (Feb. 19.46-48p3 at V=22.2-3)
Observations of small asteroids (H>22.0)
K10D01Z 2010 DZ1 (arc=1 day, H=25.4 ~28m) from Tenagra II Obs. (Feb. 20.20p3)
K10D00L 2010 DL (arc=3 days, H=27.0 ~13m) from ARO Westfield (Feb. 19.23p1 at V=21.9 & 19.28-30p2 at V=22.5)
K10D00F 2010 DF (arc=3 days, H=24.5 ~43m) from ARO Westfield (Feb. 19.09-12p3 at V=21.7-22.1)
K10C55D 2010 CD55 (arc=4 days, H=23.2 ~78m) from ARO Westfield (Feb. 19.09-10p4) and Tenagra II Obs. (Feb. 19.21p3)
K10C19O 2010 CO19 (arc=4 days, H=25.7 ~25m) from Tenagra II Obs. (Feb. 19.23p2)
K10C19H 2010 CH19 (arc=5 days, H=22.2 ~123m) from ARO Westfield (Feb. 19.18-22p3 at V=21.7-22.2)
K10C19C 2010 CC19 (i=46.6°, q=0.273 AU, arc=7 days, H=22.3 ~117m) from ARO Westfield (Feb. 19.11p3) and Tenagra II Obs. (Feb. 20.16p2)
K10C18J 2010 CJ18 (arc=6 days, H=26.8 ~15m) from ARO Westfield (Feb. 19.46p3) and Tenagra II Obs. (Feb. 19.54p5)
K10C01K 2010 CK1 (arc=10 days, H=24.0 ~54m) from Schiaparelli Obs. (Feb. 12.91-92p2) and Tenagra II Obs. (Feb. 19.20p2)
K10A61N 2010 AN61 (arc=35 days, H=27.0 ~13m) from ARO Westfield (Feb. 19.35-38p3 at V=22.3)
K10A30J 2010 AJ30 (arc=37 days, H=22.7 ~98m) from WISE (Feb. 16.02p1, 16.15p1, 16.42p1, 16.48p1 & 16.61p1)
Observations of other objects
K10D01X 2010 DX1 (Q=4.426 AU, arc=1 day, H=21.3 ~186m) from Tenagra II Obs. (Feb. 20.20-21p3)
K10D00O 2010 DO (arc=2 days, H=21.5 ~170m) from LINEAR (Feb. 17.40-44p5)
K10D00C 2010 DC (q=1.775 AU, arc=3 days, H=18.8 ~589m) from Tenagra II Obs. (Feb. 19.40p3)
K10C44M 2010 CM44 from CSS (Feb. 19.44-47p4)
K10C18H 2010 CH18 (Q=4.058 AU, arc=10 days, H=18.8 ~589m) from WISE (Feb. 10.54p1)
K09X02C 2009 XC2 (Q=4.188 AU, arc=70 days, H=17.0 ~1.35 km) from Petit Jean Mtn. South Obs. (PJMSO) (Feb. 19.46-47p5)
K09U18V 2009 UV18 (Q=5.187 AU, arc=2 opp, H=15.8 ~2.34 km, q=1.167 AU) from PJMSO (Feb. 19.46p5)
K09U17X 2009 UX17 (arc=119 days, H=21.6 ~162m) from WISE (Feb. 16.01p1, 16.15p1, 16.28p1, 16.41p1, 16.68p1, 16.94p1, 17.07p1, 17.21p1, 17.34p1, 17.47p1, 17.60p1, 17.73p1, 17.00p1, 18.07p1, 18.13p1, 18.20p1, 18.26p1, 18.33p1 & 18.46p1)
K09U03N 2009 UN3 (i=37.4°, arc=123 days, H=18.5 ~676m) from Schiaparelli Obs. (Feb. 13.11p5), PJMSO (Feb. 19.37-38p7), and Hamamatsu-Yuto Obs. (Feb. 19.76-79p9)
K09O00F 2009 OF (arc=2 opp, H=21.5 ~170m) from David Tholen's team on Mauna Kea (Jan. 19.30-32p3 at R=23.6-8)
K08E05V 2008 EV5 (arc=3 opp, H=20.0 ~339m) from WISE (Feb. 15.52p1, 15.59p1, 15.65p2, 15.78p1, 15.85p1, 15.92p1, 15.98p1, 16.05p1, 16.12p1, 16.18p1, 16.25p1, 16.38p1, 16.58p1, 16.71p1, 16.84p1, 17.11p1, 17.37p1, 17.50p1, 17.64p1, 17.90p1, 18.03p1, 18.17p1 & 18.30p1)
K08E00E 2008 EE (arc=3 opp, H=19.7 ~389m) from Schiaparelli Obs. (Feb. 13.13p1 & 13.18-19p2)
K08C01N 2008 CN1 (arc=2 opp, H=20.6 ~257m) from WISE (Feb. 16.22p2, 16.29p1, 16.35p2, 16.42p1, 16.49p1, 16.55p1, 16.62p1, 16.68p1, 16.82p1, 16.88p1 & 16.95p1)
K04T18B 2004 TB18 (arc=3 opp, H=17.7 ~977m) from PJMSO (Feb. 19.47p5)
K03B47T 2003 BT47 (arc=4 opp, H=17.4 ~1.12 km) from Schiaparelli Obs. (Feb. 13.12p1 & 13.17-18p2)
K02Y04F 2002 YF4 (arc=3 opp, H=18.6 ~645m) from WISE (Feb. 10.54p1, 10.68p1, 10.81p1, 10.94p1 & 11.34p1)
K02N16W 2002 NW16 (arc=2 opp, H=18.1 ~812m) from Schiaparelli Obs. (Feb. 12.87-89p3)
K02AC9J 2002 AJ129 (q=0.117 AU, arc=3 opp, H=18.5 ~676m) from Schiaparelli Obs. (Feb. 12.93-94p5) and Pear Tree Obs. (Feb. 18.11-14p3)
K01P09T 2001 PT9 (arc=2 opp, H=20.7 ~245m) from Schiaparelli Obs. (Feb. 13.02-03p5) and Hamamatsu-Yuto Obs. (Feb. 19.69-71p8)
K00CA1O 2000 CO101 (arc=2 opp, H=19.0 ~537m) from Hamamatsu-Yuto Obs. (Feb. 19.72-75p6)
J98O01K 1998 OK1 (arc=2 opp, H=19.4 ~446m) from Desert Moon Obs. (Feb. 19.42-44p3)
J93R00A 1993 RA (arc=3 opp, H=19.2 ~490m) from Desert Moon Obs. (Feb. 19.13-17p3)
N0420 230420 2002 PP6 from MLS (Feb. 19.22-24p4)
M9007 229007 2003 XF11 from PJMSO (Feb. 19.42p6)
E1525 141525 2002 FV5 from Desert Moon Obs. (Feb. 19.48-53p3)
86067 86067 1999 RM28 from An Carraig Obs. (Feb. 19.85-87p5)
54789 54789 2001 MZ7 from Hamamatsu-Yuto Obs. (Feb. 19.49-50p4) and An Carraig Obs. (Feb. 19.88-89p5)
27346 27346 2000 DN8 from An Carraig Obs. (Feb. 19.90-92p2)
26760 26760 2001 KP41 from the Spacewatch 0.9m telescope (Feb. 19.27-30p3)
04015 4015 Wilson-Harrington (1979 VA) from MLS (Feb. 19.10-11p4)

Observers on 20 February '10

Eighteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`J16`	An Carraig Obs. in Northern Ireland, 3 in MPEC 2010-D56 -- 86067, 54789, 27346
`H21`	Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 14 in MPEC 2010-D56 -- 2010 DL, 2010 DJ1, 2010 DH1, 2010 DG1, 2010 DF, 2010 CN44, 2010 CJ18, 2010 CH19, 2010 CG19, 2010 CF19, 2010 CD55, 2010 CC19, 2010 BU2, 2010 AN61
`703`	Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2010-D56 & 2010-D57 -- 2010 DE2, 2010 CM44
`448`	Desert Moon Obs. in New Mexico, 4 in MPEC 2010-D56 -- 2010 CD19, 1998 OK1, 1993 RA, 141525
`J95`	Great Shefford Obs. in England, 2 in MPEC 2010-D56 -- 2010 DW1, 2010 DJ1
`379`	Hamamatsu-Yuto Obs. in Japan, 4 in MPEC 2010-D56 -- 2009 UN3, 2001 PT9, 2000 CO101, 54789
`704`	LINEAR in New Mexico, 1 in MPEC 2010-D56 -- 2010 DO
`H01`	Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2010-D56 -- 2010 DJ1
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-D56 -- 2009 OF
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2010-D56 -- 2010 CQ19, 230420, 4015
`H23`	Pear Tree Obs. in Florida, 1 in MPEC 2010-D56 -- 2002 AJ129
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2010-D56 -- 2009 XC2, 2009 UV18, 2009 UN3, 2004 TB18, 229007
`854`	Sabino Canyon Obs. in Arizona, 1 in MPEC 2010-D57 -- 2010 DE2
`204`	Schiaparelli Obs. in Italy, 8 in MPEC 2010-D56 -- 2010 CK1, 2010 CA, 2009 UN3, 2008 EE, 2003 BT47, 2002 NW16, 2002 AJ129, 2001 PT9
`691`	Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2010-D56 -- 26760
`291`	Spacewatch 1.8m telescope in Arizona, 7 in MPEC 2010-D56 -- 2010 DP, 2010 DM, 2010 DJ1, 2010 DG1, 2010 CN44, 2010 CH55, 2010 CG19
`926`	Tenagra II Obs. in Arizona, 11 in MPECs 2010-D56 & 2010-D57 -- 2010 DZ1, 2010 DX1, 2010 DJ1, 2010 DE2, 2010 DC, 2010 CO19, 2010 CK1, 2010 CJ18, 2010 CF19, 2010 CD55, 2010 CC19
`C51`	WISE in Earth polar orbit, 6 in MPEC 2010-D56 -- 2010 CH18, 2010 AJ30, 2009 UX17, 2008 EV5, 2008 CN1, 2002 YF4

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

Impact Risk Monitoring on 20 February '10

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2358 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. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) 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

2010 DW1	JPL Sentry	1640	R E M O V E D						JPL #2 for the day: Risk listing removed at 1132 UTC.

2010 DG1	JPL Sentry	1640	2027-2042	2	4.7e-09	-7.41	-7.44	0	JPL: "Analysis based on 28 observations spanning 2.1136 days (2010-Feb-17.2105 to 2010-Feb-19.324051)." Diameter approximately 0.044 km. from mean, weighted H=24.4.
2010 DG1	NEODyS	1640	2027-2042	2	1.12e-09	-8.15	-8.38	0	NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2010/02/17.211 to 2010/02/19.325."

2010 DM	JPL Sentry	1640	2030-2108	6	3.6e-09	-4.55	-4.72	0	JPL: "Analysis based on 22 observations spanning 2.9669 days (2010-Feb-16.32523 to 2010-Feb-19.29217)." Diameter approximately 0.697 km. from mean, weighted H=18.4.
2010 DM	NEODyS	1640	2030-2061	3	1.64e-09	-4.69	-4.75	0	NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2010/02/16.326 to 2010/02/19.293."

2010 CH55	JPL Sentry	1640	2028-2042	8	1.9e-09	-5.70	-6.43	0	JPL: "Analysis based on 35 observations spanning 3.8977 days (2010-Feb-15.466 to 2010-Feb-19.36371)." Diameter approximately 0.529 km. from mean, weighted H=19.0.
2010 CH55	NEODyS	1640	R E M O V E D						-

2010 CN44	JPL Sentry	1640	2040-2071	6	4.1e-07	-3.58	-3.72	0	JPL: "Analysis based on 21 observations spanning 4.0584 days (2010-Feb-15.11003 to 2010-Feb-19.16839)." Diameter approximately 0.480 km. from mean, weighted H=19.2.
2010 CN44	NEODyS	1640	2040-2070	3	2.94e-07	-3.79	-4.02	0	NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2010/02/15.111 to 2010/02/19.169."

2010 CQ19	JPL Sentry	1640	2105	1	5.0e-08	-8.53	-8.53	0	JPL: "Analysis based on 22 observations spanning 4.0576 days (2010-Feb-15.27907 to 2010-Feb-19.33667)." Diameter approximately 0.013 km. from mean, weighted H=27.1.

2010 CG19	JPL Sentry	1640	R E M O V E D						JPL: Risk listing removed at 1049 UTC.
2010 CG19	NEODyS	1640	R E M O V E D						-

2010 CA	JPL Sentry	1640	2022	1	5.2e-06	-4.33	-4.33	0	JPL: "Analysis based on 61 observations spanning 8.9008 days (2010-Feb-05.19638 to 2010-Feb-14.097229)." Diameter approximately 0.043 km. from mean, weighted H=24.5.

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 20 February '10

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

1640

Noted that JPL Sentry has updated its 2010 CA risk assessment - see above
Noted that JPL Sentry has removed 2010 CG19 as an impact risk - see above
Noted that NEODyS has removed 2010 CG19 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 CH55 risk assessment - see above
Noted that NEODyS has removed 2010 CH55 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 CN44 risk assessment - see above
Noted that NEODyS has updated its 2010 CN44 risk assessment - see above
Noted that JPL Sentry has updated its 2010 CQ19 risk assessment - see above
Noted that JPL Sentry has updated its 2010 DG1 risk assessment - see above
Noted that NEODyS has updated its 2010 DG1 risk assessment - see above
Noted that JPL Sentry has updated its 2010 DM risk assessment - see above
Noted that NEODyS has updated its 2010 DM risk assessment - see above
Noted that JPL Sentry has removed 2010 DW1 as an impact risk - see above
Grabbed MPEC 2010-D56 - Daily Orbit Update - see above
Grabbed MPEC 2010-D57 - 2010 DE2 - see above

0007

Noted that JPL Sentry has posted 2010 DW1 as an impact risk - see above

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