2008-01-02 Tracking News

Contents on 2 January '08

IAU Minor Planet Center
- NEOCP Activity -- three listings: 1 new, 2 updated
- New MPECs -- fifteen MPECs
- Observers -- 34 observing facilities
Impact Risk Monitoring -- four objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page
Earth's Busy Neighborhood Traffic Report
Ephemerides for risk-rated and nearby objects
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 this year 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 2 January '08

The MPC's NEO Confirmation Page has 3 listings: 1 new, 2 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and two updated listings. All of these were "one nighters." So far The Tracking News has counted a total of 20 objects listed on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

New MPECs on 2 January '08

Minor Planet Electronic Circulars

As of last check at 2354 UTC, there have been fifteen MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-A05 time-stamped "07:08 UT" - Daily Orbit Update - see below
MPEC 2008-A06 time-stamped "14:00 UT" - Comet C/2007 Y2 (McNaught) - see below
MPEC 2008-A07 time-stamped "15:41 UT" - 2007 YM56 - see below
MPEC 2008-A08 time-stamped "15:45 UT" - 2007 YN56 - see below
MPEC 2008-A09 time-stamped "15:48 UT" - 2007 YO56 - see below
MPEC 2008-A10 time-stamped "15:50 UT" - 2007 YP56 - see below
MPEC 2008-A11 time-stamped "15:53 UT" - 2007 YQ56 - see below
MPEC 2008-A12 time-stamped "15:56 UT" - 2007 YR56 - see below
MPEC 2008-A13 time-stamped "16:01 UT" - 2007 YS56 - see below
MPEC 2008-A14 time-stamped "16:04 UT" - 2007 YT56 - see below
MPEC 2008-A15 time-stamped "16:07 UT" - 2007 YU56 - see below
MPEC 2008-A16 time-stamped "16:10 UT" - 2007 YV56 - see below
MPEC 2008-A17 time-stamped "18:00 UT" - 2008 AD - see below
MPEC 2008-A18 time-stamped "18:03 UT" - 2008 AE - see below
MPEC 2008-A19 time-stamped "20:52 UT" - 2007 VQ4

MPEC 2008-A19 - "20:52 UT" - 2007 VQ4

K07V04Q 2007 VQ4 (H=15.8 ~2.34 km, q=1.271 AU) from Rob Matson using the Siding Spring Digitized Sky Survey (1991 July 2.45-49p2), NEAT's USAF Haleakala telescope (2002 Sept. 29.48-51p3 & 2002 Oct. 6.47p1), and NEAT's Mt. Palomar telescope (2002 Oct. 8.33p1, 2002 Oct. 8.37p1, 2002 Nov. 4.19p1 & 2002 Dec. 5.09-13p2)

MPEC 2008-A18 - "18:03 UT" - 2008 AE

K08A00E 2008 AE (risk-listed, H=19.7 ~389m) was discovered at 1020 UT on 1 Jan. by the Catalina Sky Survey (CSS), which observed it at Jan. 1.43-45p4 and 1.54-55p4. The discovery was confirmed by Farra d'Isonzo Obs. (Jan. 1.98-00p2) and roving observer (Jan. 2.10-12p4).

MPEC 2008-A17 - "18:00 UT" - 2008 AD

K08A00D 2008 AD (H=20.0 ~339m) was discovered at 0614 UT on 1 Jan. by the CSS, which observed it at Jan. 1.26-31p7. The discovery was confirmed by Farra d'Isonzo Obs. (Jan. 1.76-81p3), CAST Obs. (Jan. 1.87p2), and CEAMIG-REA (Jan. 1.97-98p3).

MPEC 2008-A16 - "16:10 UT" - 2007 YV56

K07Y56V 2007 YV56 (risk-listed, Earth MOID=2.1 LD, H=20.9 ~224m) was discovered at 1221 UT on 31 Dec. by the CSS, which observed it at Dec. 31.51-56p10. The discovery was confirmed by Farra d'Isonzo Obs. (Jan. 1.01p3), roving observer (Jan. 1.01-02p4), Schiaparelli Obs. (Jan. 1.09-10p3), Robert Hutsebaut via RAS Obs. Mayhill (Jan. 1.39p2), the Mt. Lemmon Survey (MLS) (Jan. 1.51-56p8), and CEAMIG-REA (Jan. 2.22-23p3).

MPEC 2008-A15 - "16:07 UT" - 2007 YU56

K07Y56U 2007 YU56 (borderline-small, H=22.0 ~135m) was discovered at 1126 UT on 31 Dec. by the CSS, which observed it at Dec. 31.48-54p12. The discovery was confirmed by Naef Obs. (Jan. 1.02-05p5), MLS (Jan. 1.51-53p4), and Farra d'Isonzo Obs. (Jan. 2.04-06p3).

MPEC 2008-A14 - "16:04 UT" - 2007 YT56

K07Y56T 2007 YT56 (small asteroid, H=23.4 ~71m) was discovered at 0853 UT on 31 Dec. by the CSS, which observed it at Dec. 31.37-41p5 and 31.50-51p3. The discovery was confirmed by MLS (Jan. 1.47-49p4).

MPEC 2008-A13 - "16:01 UT" - 2007 YS56

K07Y56S 2007 YS56 (risk-listed, Earth MOID=1.2 LD, H=25.6 ~26m) was discovered at 0553 UT on 31 Dec. by the CSS, which observed it at Dec. 31.25-27p4. The discovery was confirmed by Schiaparelli Obs. (Dec. 31.91-92p3), New Millennium Obs. (Dec. 31.93-94p4), MLS (Jan. 1.29-31p3), Desert Moon Obs. (Jan. 1.31p1), Farra d'Isonzo Obs. (Jan. 1.84-85p2), and Guidestar Obs. (Jan. 1.89-91p3). This object was within ten lunar distances (LD) of Earth, reaching 1.3 LD on 26 Dec.

MPEC 2008-A12 - "15:56 UT" - 2007 YR56

K07Y56R 2007 YR56 (small asteroid, Earth MOID=6.4 LD, H=25.9 ~22m) was discovered at 0451 UT on 31 Dec. by the MLS, which observed it at Dec. 31.20-25p7 and 31.30p4. The discovery was confirmed by Schiaparelli Obs. (Dec. 31.88p2). This object was within ten lunar distances (LD) of Earth, reaching 9.7 LD on 30 Dec.

MPEC 2008-A11 - "15:53 UT" - 2007 YQ56

K07Y56Q 2007 YQ56 (Earth MOID=5.1 LD, H=19.7 ~389m) was discovered at 0329 UT on 31 Dec. by LONEOS, which observed it at Dec. 31.15-22p4. The discovery was confirmed by MLS (Dec. 31.25p3 & Jan. 1.15-18p3), Grasslands Obs. (Dec. 31.26p3), Farra d'Isonzo Obs. (Dec. 31.70-71p3), CAST Obs. (Dec. 31.74-75p3), Gnosca Obs. (Dec. 31.75-76p2), New Millennium Obs. (Dec. 31.78-79p4 & Jan. 1.72-73p7), Schiaparelli Obs. (Dec. 31.82-83p3), the Spacewatch 1.8m telescope (Jan. 1.16-17p3), and Junk Bond Obs. (Jan. 1.17-18p4).

MPEC 2008-A10 - "15:50 UT" - 2007 YP56

K07Y56P 2007 YP56 (small asteroid, Earth MOID=0.2 LD, H=25.8 ~23m) was discovered at 0812 UT on 30 Dec. by LINEAR, which observed it at Dec. 30.34-38p4. The discovery was confirmed by Farra d'Isonzo Obs. (Dec. 31.04-05p2), Ceccano Obs. (Dec. 31.09p3), Schiaparelli Obs. (Dec. 31.09p1), MLS (Dec. 31.19-20p3), Grasslands Obs. (Dec. 31.29p3), Junk Bond Obs. (Jan. 1.25-29p3), and Spacewatch 1.8m (Jan. 1.32-34p3). This object was within ten lunar distances (LD) of Earth, reaching 1.5 LD on 28 Dec.

MPEC 2008-A09 - "15:48 UT" - 2007 YO56

K07Y56O 2007 YO56 (H=20.1 ~323m) was discovered at 0811 UT on 30 Dec. by the Spacewatch 0.9m telescope, which observed it at Dec. 30.34-38p3. The discovery was confirmed by Spacewatch 1.8m (Dec. 30.44-45p3, 31.23-24p3 & Jan. 1.37-38p3) and MLS (Dec. 30.45-54p8).

MPEC 2008-A08 - "15:45 UT" - 2007 YN56

K07Y56N 2007 YN56 (small asteroid, H=23.0 ~85m) was discovered at 0743 UT on 30 Dec. by LINEAR, which observed it at Dec. 30.32-37p5, 31.19-25p9, and 31.33-38p5. The discovery was confirmed by Suno Obs. (Dec. 30.99-00p6), Farra d'Isonzo Obs. (Dec. 31.02-03p3), Schiaparelli Obs. (Dec. 31.03-05p3), Astronomical Research Obs. (ARO) (Dec. 31.07p3), Junk Bond Obs. (Dec. 31.22-24p2 & Jan. 1.23-27p5), Grasslands Obs. (Dec. 31.25p3), Heath Rhoades via Table Mtn. Obs. (Dec. 31.42-44p4), Mt. John Obs. (Dec. 31.49p3), Gnosca Obs. (Dec. 31.85-86p3), New Millennium Obs. (Dec. 31.91-92p7), MLS (Jan. 1.29-30p3), and Guidestar Obs. (Jan. 1.87-88p3).

MPEC 2008-A07 - "15:41 UT" - 2007 YM56

K07Y56M 2007 YM56 (risk-listed, H=21.8 ~148m) was discovered at 0703 UT on 30 Dec. by the Spacewatch 0.9m, which observed it at Dec. 30.29-33p3. The discovery was confirmed by Spacewatch 1.8m (Dec. 30.45-46p3, 31.24-25p2 & Jan. 1.34-35p3).

MPEC 2008-A06 - "14:00 UT" - Comet C/2007 Y2 (McNaught)

CK07Y020 C/2007 Y2 (i=98.7°, q=4.132 AU, TP=2008 May 18.189 TT) from the Siding Spring Survey (SSS) (Dec. 31.67-70p4, Jan. 1.44-45p2, 1.61p1 & 1.73p1) and CEAMIG-REA (Jan. 1.14p3 & 2.06p2)

<< DOU on 2 Jan. '08 >> MPEC 2008-A05 - "07:08 UT" - Daily Orbit Update

Observations of recently (no longer) risk-listed objects
K07Y00Z 2007 YZ (arc=15 days, H=19.7 ~389m) from Lumezzane Obs. (Dec. 29.91p4), Gnosca Obs. (Dec. 31.90-93p4), Petit Jean Mtn. South Obs. (PJMSO) (Jan. 1.34p7), and Hamamatsu-Yuto Obs. (Jan. 1.55p1, 1.70-71p2 & 1.77p2)
K07T24U 2007 TU24 (arc=83 days, H=20.1 ~323m) from Schiaparelli Obs. (Dec. 29.77p1 & Jan. 1.78p1)
Observations of other objects
K07Y01M 2007 YM1 (arc=14 days, H=20.8 ~234m) from Lumezzane Obs. (Dec. 29.89-90p3) and CSS (Jan. 1.26-31p8)
K07X20J 2007 XJ20 (arc=19 days, H=18.4 ~708m) from MLS (Jan. 1.25-28p4)
K07X16H 2007 XH16 (arc=24 days, H=19.7 ~389m) from New Millennium Obs. (Jan. 1.76p2)
K07VI3R 2007 VR183 (Q=4.353 AU, arc=109 days, H=17.4 ~1.12 km) from Desert Moon Obs. (Jan. 1.26-28p3)
K07V04Q 2007 VQ4 (arc=57 days, H=15.8 ~2.34 km, q=1.271 AU) from Lumezzane Obs. (Dec. 29.92p4)
K07T08G 2007 TG8 (Q=4.306 AU, arc=110 days, H=18.6 ~645m) from New Millennium Obs. (Jan. 1.76p2)
K07S06P 2007 SP6 (arc=2 opp, H=18.2 ~776m) from Matson/Siding Spring DSS (1978 Oct. 23.41p1 & 1978 Oct. 23.46p1)
K07RE7T 2007 RT147 (arc=112 days, H=18.2 ~776m) from Desert Moon Obs. (Jan. 1.18p1)
K05X08K 2005 XK8 (arc=2 opp, H=19.7 ~389m) from MLS (Jan. 1.22-25p3)
K05W56J 2005 WJ56 (arc=3 opp, H=17.9 ~891m) from Hamamatsu-Yuto Obs. (Jan. 1.80-82p7)
J99R33H 1999 RH33 (arc=5 opp, H=19.5 ~426m) from CSS (Jan. 1.26-28p4)
H0903 170903 2004 WS2 from Lumezzane Obs. (Dec. 29.86-87p4)
H0891 170891 2004 TY16 from Lumezzane Obs. (Dec. 29.91-92p4)
G2173 162173 1999 JU3 from CSS (Jan. 1.11-13p4)
F4347 154347 2002 XK4 from CSS (Jan. 1.49-51p4)
F3591 153591 2001 SN263 from Lumezzane Obs. (Dec. 29.88-89p4)
E3678 143678 2003 SA224 from New Millennium Obs. (Jan. 1.77p2)
E0288 140288 2001 SN289 from CSS (Jan. 1.52-54p4)
D7084 137084 1998 XS16 from New Millennium Obs. (Jan. 1.77p2)
D6793 136793 1997 AQ18 from Lumezzane Obs. (Dec. 29.92-93p4)
99935 99935 2002 AV4 from New Millennium Obs. (Jan. 1.76-80p4)
96189 96189 1991 NT3 from Cormons Obs. (Dec. 31.97-98p4)
90403 90403 2003 YE45 from Lumezzane Obs. (Dec. 29.93-94p3)
86324 86324 1999 WA2 from New Millennium Obs. (Jan. 1.77p2)
85804 85804 1998 WQ5 from New Millennium Obs. (Jan. 1.79p2)
68063 68063 2000 YJ66 from Cormons Obs. (Dec. 31.94-95p4)
66407 66407 1999 LQ28 from CSS (Jan. 1.49-51p4)
66272 66272 1999 JW6 from Lumezzane Obs. (Dec. 29.74-75p4) and Crni Vrh Obs. (Dec. 31.71-74p4)
66251 66251 1999 GJ2 from CSS (Jan. 1.29-31p4)
33342 33342 1998 WT24 from Lumezzane Obs. (Dec. 29.72-73p3) and CSS (Jan. 1.11-13p4)
20826 20826 2000 UV13 from New Millennium Obs. (Jan. 1.76-77p2)
10563 10563 Izhdubar (1993 WD) from Lumezzane Obs. (Dec. 29.76p4)
09172 9172 Abhramu (1989 OB) from Spacewatch 0.9m (Jan. 1.24-27p3)
07092 7092 Cadmus (1992 LC) from CSS (Jan. 1.11-12p3)
05587 5587 1990 SB from CSS (Jan. 1.43-45p4)
04450 4450 Pan (1987 SY) from Cormons Obs. (Dec. 31.99-00p4) and Atlante Obs. (Jan. 2.09-12p3)
03553 3553 Mera (1985 JA) from CSS (Jan. 1.18-20p4)
01866 1866 Sisyphus (1972 XA) from CSS (Jan. 1.51-53p4)
01620 1620 Geographos (1951 RA) from Atlante Obs. (Jan. 2.14-15p3)

Observers on 2 January '08

A total of 34 observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. in Illinois, 1 in MPEC 2008-A08 -- 2007 YN56
`J51`	Atlante Obs. in the Canary Islands, 2 in MPEC 2008-A05 -- 4450, 1620
`235`	CAST Obs. in Italy, 2 in MPECs 2008-A11 & 2008-A17 -- 2008 AD, 2007 YQ56
`I77`	CEAMIG-REA in Brazil, 3 in MPECs 2008-A06, 2008-A16 & 2008-A17 -- 2008 AD, 2007 YV56, C/2007 Y2
`703`	Catalina Sky Survey (CSS) in Arizona, 18 in MPECs 2008-A05, 2008-A13, 2008-A14, 2008-A15, 2008-A16, 2008-A17 & 2008-A18 -- 2008 AE, 2008 AD, 2007 YV56, 2007 YU56, 2007 YT56, 2007 YS56, 2007 YM1, 1999 RH33, 66407, 66251, 33342, 162173, 154347, 140288, 7092, 5587, 3553, 1866
`470`	Ceccano Obs. in Italy, 1 in MPEC 2008-A10 -- 2007 YP56
`A94`	Cormons Obs. in Italy, 3 in MPEC 2008-A05 -- 96189, 68063, 4450
`106`	Crni Vrh Obs. in Slovenia, 1 in MPEC 2008-A05 -- 66272
`448`	Desert Moon Obs. in New Mexico, 3 in MPECs 2008-A05 & 2008-A13 -- 2007 YS56, 2007 VR183, 2007 RT147
`595`	Farra d'Isonzo Obs. in Italy, 8 in MPECs 2008-A08, 2008-A10, 2008-A11, 2008-A13, 2008-A15, 2008-A16, 2008-A17 & 2008-A18 -- 2008 AE, 2008 AD, 2007 YV56, 2007 YU56, 2007 YS56, 2007 YQ56, 2007 YP56, 2007 YN56
`143`	Gnosca Obs. in Switzerland, 3 in MPECs 2008-A05, 2008-A08 & 2008-A11 -- 2007 YZ, 2007 YQ56, 2007 YN56
`651`	Grasslands Obs. in Arizona, 3 in MPECs 2008-A08, 2008-A10 & 2008-A11 -- 2007 YQ56, 2007 YP56, 2007 YN56
`A17`	Guidestar Obs. in Germany, 2 in MPECs 2008-A08 & 2008-A13 -- 2007 YS56, 2007 YN56
`379`	Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2008-A05 -- 2007 YZ, 2005 WJ56
`701`	Junk Bond Obs. in Arizona, 3 in MPECs 2008-A08, 2008-A10 & 2008-A11 -- 2007 YQ56, 2007 YP56, 2007 YN56
`704`	LINEAR in New Mexico, 2 in MPECs 2008-A08 & 2008-A10 -- 2007 YP56, 2007 YN56
`699`	LONEOS in Arizona, 1 in MPEC 2008-A11 -- 2007 YQ56
`130`	Lumezzane Obs. in Italy, 11 in MPEC 2008-A05 -- 2007 YZ, 2007 YM1, 2007 VQ4, 90403, 66272, 33342, 170903, 170891, 153591, 136793, 10563
`474`	Mt. John Obs. in New Zealand, 1 in MPEC 2008-A08 -- 2007 YN56
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2008-A05, 2008-A08, 2008-A09, 2008-A10, 2008-A11, 2008-A12, 2008-A13, 2008-A14, 2008-A15 & 2008-A16 -- 2007 YV56, 2007 YU56, 2007 YT56, 2007 YS56, 2007 YR56, 2007 YQ56, 2007 YP56, 2007 YO56, 2007 YN56, 2007 XJ20, 2005 XK8
`644`	NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2008-A19 -- 2007 VQ4
`608`	NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2008-A19 -- 2007 VQ4
`A13`	Naef Obs. in Switzerland, 1 in MPEC 2008-A15 -- 2007 YU56
`A24`	New Millennium Obs. in Italy, 11 in MPECs 2008-A05, 2008-A08, 2008-A11 & 2008-A13 -- 2007 YS56, 2007 YQ56, 2007 YN56, 2007 XH16, 2007 TG8, 99935, 86324, 85804, 20826, 143678, 137084
`H45`	Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2008-A05 -- 2007 YZ
`H062`	Robert Hutsebaut in Belgium via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2008-A16 -- 2007 YV56
`204`	Schiaparelli Obs. in Italy, 7 in MPECs 2008-A05, 2008-A08, 2008-A10, 2008-A11, 2008-A12, 2008-A13 & 2008-A16 -- 2007 YV56, 2007 YS56, 2007 YR56, 2007 YQ56, 2007 YP56, 2007 YN56, 2007 TU24
`260&`	Rob Matson in California using the Siding Spring Digitized Sky Survey in New South Wales, 2 in MPECs 2008-A05 & 2008-A19 -- 2007 VQ4, 2007 SP6
`E12`	Siding Spring Survey in New South Wales, 1 in MPEC 2008-A06 -- C/2007 Y2
`691`	Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2008-A05, 2008-A07 & 2008-A09 -- 2007 YO56, 2007 YM56, 9172
`291`	Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2008-A07, 2008-A09, 2008-A10 & 2008-A11 -- 2007 YQ56, 2007 YP56, 2007 YO56, 2007 YM56
`147`	Suno Obs. in Italy, 1 in MPEC 2008-A08 -- 2007 YN56
`6739`	Heath Rhoades via Table Mtn. Obs. in southern California, 1 in MPEC 2008-A08 -- 2007 YN56
`247`	roving observer, 2 in MPECs 2008-A16 & 2008-A18 -- 2008 AE, 2007 YV56

Impact Risk Monitoring on 2 January '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2354 UTC)
See the CRT page for a list of all objects rated recently as risks.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
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

2008 AE	JPL Sentry	2131	2017-2107	18	8.2e-09	-5.25	-5.79	0	JPL: "Analysis based on 12 observations spanning .68896 days (2008-Jan-01.43123 to 2008-Jan-02.12019)." Diameter approximately 0.400 km. from mean, weighted H=19.7.

2007 YV56	JPL Sentry	2009	2075	2	5.1e-10	-7.24	-7.46	0	JPL: "Analysis based on 29 observations spanning 1.7142 days (2007-Dec-31.5148 to 2008-Jan-02.22898)." Diameter approximately 0.220 km. from mean, weighted H=20.9.

2007 YS56	JPL Sentry	2009	2084-2095	4	1.6e-07	-7.37	-7.41	0	JPL: "Analysis based on 20 observations spanning 1.6607 days (2007-Dec-31.24562 to 2008-Jan-01.90636)." Diameter approximately 0.025 km. from mean, weighted H=25.6.

2007 YM56	JPL Sentry	2320	2012	1	1.0e-10	-7.65	-7.65	0	JPL: "Analysis based on 11 observations spanning 2.0593 days (2007-Dec-30.29391 to 2008-Jan-01.35318)." Diameter approximately 0.130 km. from mean, weighted H=22.0.

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 2 January '08

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

2320	Noted that JPL Sentry has posted 2007 YM56 as an impact risk - see above
2131	Noted that JPL Sentry has posted 2008 AE as an impact risk - see above Grabbed MPEC 2008-A19 - 2007 VQ4 - see above
2009	Noted that JPL Sentry has posted 2007 YS56 as an impact risk - see above Noted that JPL Sentry has posted 2007 YV56 as an impact risk - see above
1810	Grabbed MPEC 2008-A17 - 2008 AD - see above Grabbed MPEC 2008-A18 - 2008 AE - see above
1631	Grabbed MPEC 2008-A13 - 2007 YS56 - see above Grabbed MPEC 2008-A14 - 2007 YT56 - see above Grabbed MPEC 2008-A15 - 2007 YU56 - see above Grabbed MPEC 2008-A16 - 2007 YV56 - see above
1600	Grabbed MPEC 2008-A07 - 2007 YM56 - see above Grabbed MPEC 2008-A08 - 2007 YN56 - see above Grabbed MPEC 2008-A09 - 2007 YO56 - see above Grabbed MPEC 2008-A10 - 2007 YP56 - see above Grabbed MPEC 2008-A11 - 2007 YQ56 - see above Grabbed MPEC 2008-A12 - 2007 YR56 - see above
1433	Grabbed MPEC 2008-A06 - Comet C/2007 Y2 (McNaught) - see above
1400	Grabbed MPEC 2008-A05 - Daily Orbit Update - see above

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