2007-12-18 Tracking News

Contents on 18 December '07

IAU Minor Planet Center
- NEOCP Activity -- twelve listings: 6 new, 6 updated
- New MPECs -- eleven MPECs
- Observers -- 30 observing facilities
Impact Risk Monitoring -- thirteen 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 18 December '07

The MPC's NEO Confirmation Page has 12 listings: 6 new, 6 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had six new and six updated listings. Of these, ten were "one nighters." So far The Tracking News has counted a total of 29 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 18 December '07

Minor Planet Electronic Circulars

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

MPEC 2007-Y19 time-stamped "05:21 UT" - 2007 XF25 - see below
MPEC 2007-Y20 time-stamped "05:26 UT" - 2007 YZ - see below
MPEC 2007-Y21 time-stamped "07:09 UT" - Daily Orbit Update - see below
MPEC 2007-Y22 time-stamped "18:02 UT" - Comet C/2007 Y1 (LINEAR) - see below
MPEC 2007-Y23 time-stamped "20:02 UT" - 2007 YF1 - see below
MPEC 2007-Y24 time-stamped "20:07 UT" - 2007 YG1 - see below
MPEC 2007-Y25 time-stamped "20:18 UT" - 2007 YH1 - see below
MPEC 2007-Y26 time-stamped "20:23 UT" - 2007 YJ1 - see below
MPEC 2007-Y27 time-stamped "21:52 UT" - 2007 MB24 - see below
MPEC 2007-Y28 time-stamped "22:06 UT" - 2007 YM1 - see below
MPEC 2007-Y29 time-stamped "22:33 UT" - 2007 YN1

MPEC 2007-Y29 - "22:33 UT" - 2007 YN1

K07Y01N 2007 YN1 (small asteroid, Q=4.619 AU, Earth MOID=1.0 LD, H=25.0 ~34m) was discovered at 0726 UT on 18 Dec. by the Spacewatch 0.9m telescope, which observed it at Dec. 18.31-35p3 and 18.41-42p3. The discovery was confirmed by Robert Hutsebaut via RAS Obs. Mayhill (Dec. 18.48-49p2), Guidestar Obs. (Dec. 18.86-88p3), and Farra d'Isonzo Obs. (Dec. 18.89-90p3). This object was within ten lunar distances (LD) of Earth, reaching 4.0 LD on 16 Dec.

MPEC 2007-Y28 - "22:06 UT" - 2007 YM1

K07Y01M 2007 YM1 (H=20.7 ~245m) was discovered at 0526 UT on 18 Dec. by the Catalina Sky Survey (CSS), which observed it at Dec. 18.23-29p8 and 18.40p1. The discovery was confirmed by Grasslands Obs. (Dec. 18.29p3), Hutsebaut/RAS Mayhill (Dec. 18.41p2), Saint-Barthelemy Obs. (Dec. 18.72-74p4), Alter Satzberg Obs. (Dec. 18.74-76p5), Guidestar Obs. (Dec. 18.79-80p3), Farra d'Isonzo Obs. (Dec. 18.83p2), and KLENOT (Dec. 18.88p5).

MPEC 2007-Y27 - "21:52 UT" - 2007 MB24

K07M24B 2007 MB24 (i=47.7°, H=18.2 ~776m) from Andrew Lowe using the Palomar Digitized Sky Survey (1989 July 1.30-34p2, 1989 July 6.27p1 & 1989 July 6.31p1)

MPEC 2007-Y26 - "20:23 UT" - 2007 YJ1

K07Y01J 2007 YJ1 (small asteroid, H=25.2 ~31m) was discovered at 1119 UT on 17 Dec. by the Mt. Lemmon Survey (MLS), which observed it at Dec. 17.47-54p8 at V=22.1-3 and 18.36-38p4.

MPEC 2007-Y25 - "20:18 UT" - 2007 YH1

K07Y01H 2007 YH1 (small asteroid, H=25.0 ~34m) was discovered at 1024 UT on 17 Dec. by the MLS, which observed it at Dec. 17.43-45p4, 17.53-54p3 at V=22.9, and 18.32-34p4.

MPEC 2007-Y24 - "20:07 UT" - 2007 YG1

K07Y01G 2007 YG1 (risk-listed, H=17.5 ~1.07 km) was discovered at 1055 UT on 16 Dec. by the MLS, which observed it at Dec. 16.46-48p4, 17.46-47p4, and 18.32-34p4. The discovery was confirmed by the Spacewatch 1.8m telescope (Dec. 18.27-28p3) and McDonald Obs. (Dec. 18.35-37p3).

MPEC 2007-Y23 - "20:02 UT" - 2007 YF1

K07Y01F 2007 YF1 (H=18.5 ~676m) was discovered at 1011 UT on 16 Dec. by LONEOS, which observed it at Dec. 16.42-47p4. The discovery was confirmed by Farpoint Obs. (Dec. 17.45-46p5), MLS (Dec. 17.48-50p3), Grasslands Obs. (Dec. 18.27-28p3), and McDonald Obs. (Dec. 18.32-33p3).

MPEC 2007-Y22 - "18:02 UT" - Comet C/2007 Y1 (LINEAR)

CK07Y010 C/2007 Y1 (i=110.1°, q=3.380 AU, TP=2008 Mar. 10.736 TT) from LINEAR (Dec. 16.38-43p5), the SZTE Asteroid Program (SZTE) (Dec. 17.15p4), RAS Obs. Mayhill (Dec. 17.41p1, 17.47p1 & 18.46-47p2), and McDonald Obs. (Dec. 18.45-47p3)

<< DOU on 18 Dec. '07 >> MPEC 2007-Y21 - "07:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K07Y00Z 2007 YZ (arc=1 day, H=20.0 ~339m) from Magdalena Ridge Obs. (MRO) (Dec. 18.21-22p4)
K07Y00J 2007 YJ (arc=1 day, H=21.6 ~162m) from Great Shefford Obs. (Dec. 16.88-91p3)
K07Y00G 2007 YG (small asteroid, arc=2 days, H=23.3 ~74m) from Spacewatch 1.8m (Dec. 18.14-15p3)
K07X18F 2007 XF18 (i=59.3°, arc=6 days, H=20.6 ~257m) from Great Shefford Obs. (Dec. 17.05p3) and Spacewatch 1.8m (Dec. 18.10-11p3)
K07X16J 2007 XJ16 (arc=13 days, H=18.9 ~562m) from Spacewatch 1.8m (Dec. 18.22-23p3)
K07X11K 2007 XK11 (Q=4.489 AU, arc=12 days, H=19.2 ~490m) from Spacewatch 1.8m (Dec. 18.07-08p3)
K07X10B 2007 XB10 (i=42.0°, arc=13 days, H=17.4 ~1.12 km) from Spacewatch 1.8m (Dec. 18.16-17p3) and Jornada Obs. (Dec. 18.19-23p3)
K07X09Z 2007 XZ9 (small asteroid, arc=14 days, H=24.8 ~37m) from Spacewatch 1.8m (Dec. 18.18p3)
K07X03P 2007 XP3 (q=0.256 AU, Q=4.150 AU, arc=14 days, H=19.1 ~513m) from Spacewatch 1.8m (Dec. 18.19-20p3)
K07VI4K 2007 VK184 (almost small, arc=36 days, H=22.0 ~135m) from Spacewatch 1.8m (Dec. 18.12-13p3)
Observations of recently (no longer) risk-listed objects
K07W55E 2007 WE55 (arc=18 days, H=20.1 ~323m) from Beaconsfield Obs. (Dec. 16.95-01p3)
K07W04V 2007 WV4 (i=38.3°, arc=29 days, H=19.2 ~490m) from Spacewatch 1.8m (Dec. 18.24p3)
K07W03Y 2007 WY3 (Q=4.941 AU, arc=29 days, H=18.2 ~776m) from Petit Jean Mtn. South Obs. (PJMSO) (Dec. 17.31-32p3)
K07VI9G 2007 VG189 (arc=35 days, H=19.2 ~490m) from Jornada Obs. (Dec. 18.14-17p2)
Observations of other objects
K07X16H 2007 XH16 (arc=9 days, H=19.4 ~446m) from CEAMIG-REA (Dec. 18.09-10p3)
K07W55F 2007 WF55 (arc=17 days, H=19.1 ~513m) from PJMSO (Dec. 17.38-39p8) and La Fecha Obs. (Dec. 17.91p1, 17.97p1 & 18.04p1)
K07W00B 2007 WB (arc=32 days, H=18.8 ~589m) from Jornada Obs. (Dec. 18.08-12p3)
K07V04Q 2007 VQ4 (arc=44 days, H=15.9 ~2.24 km, q=1.271 AU) from PJMSO (Dec. 17.33-34p7) and Hamamatsu-Yuto Obs. (Dec. 17.71-74p6)
K07U06S 2007 US6 (arc=3 opp, H=18.3 ~741m) from PJMSO (Dec. 17.02-03p6)
K07T08G 2007 TG8 (Q=4.306 AU, arc=95 days, H=18.6 ~645m) from SZTE (Dec. 17.68-69p4)
K07S11E 2007 SE11 (i=48.3°, arc=88 days, H=17.8 ~933m) from SZTE (Dec. 17.70-71p4)
K07S06P 2007 SP6 (arc=87 days, H=18.2 ~776m) from PJMSO (Dec. 17.28-29p7) and Hamamatsu-Yuto Obs. (Dec. 17.67-70p7)
K07P11U 2007 PU11 (Q=4.384 AU, arc=3 opp, H=16.3 ~1.86 km) from Iturrieta Obs. (Dec. 16.86-87p2) and Hamamatsu-Yuto Obs. (Dec. 17.54-56p4)
K07N04S 2007 NS4 (arc=155 days, H=18.9 ~562m) from Spacewatch 1.8m (Dec. 17.49-50p3)
K05YC8Y 2005 YY128 (arc=3 opp, H=18.3 ~741m) from Spacewatch 0.9m (Dec. 17.43-46p3)
K05Y55W 2005 YW55 (arc=4 opp, H=19.3 ~467m) from PJMSO (Dec. 17.08-10p5)
K05X08K 2005 XK8 (arc=2 opp, H=19.8 ~371m) from Guidestar Obs. (Dec. 17.77-80p3)
K05X01D 2005 XD1 (arc=2 opp, H=19.2 ~490m) from La Fecha Obs. (Dec. 17.94p1 & 17.99p1)
K05T45U 2005 TU45 (arc=3 opp, H=17.0 ~1.35 km) from PJMSO (Dec. 17.30-31p5)
K03B84H 2003 BH84 (arc=2 opp, H=16.9 ~1.41 km) from Hamamatsu-Yuto Obs. (Dec. 17.57-64p7)
K01P09K 2001 PK9 (arc=4 opp, H=18.0 ~851m) from MLS (Dec. 17.50-52p4)
K01F06Z 2001 FZ6 (arc=4 opp, H=18.4 ~708m) from PJMSO (Dec. 17.41-42p5)
H0891 170891 2004 TY16 from PJMSO (Dec. 17.42-43p5)
G2004 162004 1991 VE from PJMSO (Dec. 17.03-04p5)
F3591 153591 2001 SN263 from San Benedetto Po Obs. (Dec. 13.83-84p4) and Montana Blanca Obs. (Dec. 17.84-85p3)
F3201 153201 2000 WO107 from PJMSO (Dec. 17.40p6)
D8947 138947 2001 BA40 from PJMSO (Dec. 17.44p7)
90403 90403 2003 YE45 from PJMSO (Dec. 17.29-30p5)
85628 85628 1998 KV2 from Spacewatch 0.9m (Dec. 17.47-50p3)
31346 31346 1998 PB1 from MLS (Dec. 17.37-38p4)
31345 31345 1998 PG from MLS (Dec. 17.50-52p4)
25916 25916 2001 CP44 from PJMSO (Dec. 17.45-46p5)
23548 23548 1994 EF2 from Spacewatch 0.9m (Dec. 17.47-50p3)
18736 18736 1998 NU from PJMSO (Dec. 17.10-11p5)
11398 11398 1998 YP11 from PJMSO (Dec. 17.46-47p5)
09400 9400 1994 TW1 from MLS (Dec. 17.54-55p4)
07889 7889 1994 LX from CSS (Dec. 17.55-56p4)

MPEC 2007-Y20 - "05:26 UT" - 2007 YZ

K07Y00Z 2007 YZ (risk-listed, H=20.2 ~309m) was discovered at 1558 UT on 17 Dec. by Bisei Spaceguard Center (Bisei), which observed it at Dec. 17.67-68p7. The discovery was confirmed by Ageo Obs. (Dec. 17.76-77p4), SZTE (Dec. 17.85-87p5), Guidestar Obs. (Dec. 17.86-87p3), and Farra d'Isonzo Obs. (Dec. 17.90-92p2).

MPEC 2007-Y19 - "05:21 UT" - 2007 XF25

K07X25F 2007 XF25 (risk-listed, H=20.7 ~245m) was discovered at 0749 UT on 15 Dec. by LINEAR, which observed it at Dec. 15.33-38p4. The discovery was confirmed by MLS (Dec. 17.42-43p4).

Observers on 18 December '07

A total of 30 observing facilities appear in today's MPECs.

Code	Observer / observatory
`349`	Ageo Obs. in Japan, 1 in MPEC 2007-Y20 -- 2007 YZ
`B03`	Alter Satzberg Obs. in Austria, 1 in MPEC 2007-Y28 -- 2007 YM1
`J92`	Beaconsfield Obs. in England, 1 in MPEC 2007-Y21 -- 2007 WE55
`300`	Bisei Spaceguard Center in Japan, 1 in MPEC 2007-Y20 -- 2007 YZ
`I77`	CEAMIG-REA in Brazil, 1 in MPEC 2007-Y21 -- 2007 XH16
`703`	Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2007-Y21 & 2007-Y28 -- 2007 YM1, 7889
`734`	Farpoint Obs. in Kansas, 1 in MPEC 2007-Y23 -- 2007 YF1
`595`	Farra d'Isonzo Obs. in Italy, 3 in MPECs 2007-Y20, 2007-Y28 & 2007-Y29 -- 2007 YZ, 2007 YN1, 2007 YM1
`651`	Grasslands Obs. in Arizona, 2 in MPECs 2007-Y23 & 2007-Y28 -- 2007 YM1, 2007 YF1
`J95`	Great Shefford Obs. in England, 2 in MPEC 2007-Y21 -- 2007 YJ, 2007 XF18
`A17`	Guidestar Obs. in Germany, 4 in MPECs 2007-Y20, 2007-Y21, 2007-Y28 & 2007-Y29 -- 2007 YZ, 2007 YN1, 2007 YM1, 2005 XK8
`379`	Hamamatsu-Yuto Obs. in Japan, 4 in MPEC 2007-Y21 -- 2007 VQ4, 2007 SP6, 2007 PU11, 2003 BH84
`J44`	Iturrieta Obs. in Spain, 1 in MPEC 2007-Y21 -- 2007 PU11
`715`	Jornada Obs. in New Mexico, 3 in MPEC 2007-Y21 -- 2007 XB10, 2007 WB, 2007 VG189
`246`	KLENOT in the Czech Republic, 1 in MPEC 2007-Y28 -- 2007 YM1
`704`	LINEAR in New Mexico, 2 in MPECs 2007-Y19 & 2007-Y22 -- C/2007 Y1, 2007 XF25
`699`	LONEOS in Arizona, 1 in MPEC 2007-Y23 -- 2007 YF1
`J34`	La Fecha Obs., 2 in MPEC 2007-Y21 -- 2007 WF55, 2005 XD1
`H01`	Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2007-Y21 -- 2007 YZ
`711`	McDonald Obs. in Texas, 3 in MPECs 2007-Y22, 2007-Y23 & 2007-Y24 -- 2007 YG1, 2007 YF1, C/2007 Y1
`J46`	Montana Blanca Obs. in the Canary Islands, 1 in MPEC 2007-Y21 -- 153591
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2007-Y19, 2007-Y21, 2007-Y23, 2007-Y24, 2007-Y25 & 2007-Y26 -- 2007 YJ1, 2007 YH1, 2007 YG1, 2007 YF1, 2007 XF25, 2001 PK9, 31346, 31345, 9400
`2614`	Andrew Lowe in Alberta using the Palomar Digitized Sky Survey in southern California, 1 in MPEC 2007-Y27 -- 2007 MB24
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 16 in MPEC 2007-Y21 -- 2007 WY3, 2007 WF55, 2007 VQ4, 2007 US6, 2007 SP6, 2005 YW55, 2005 TU45, 2001 FZ6, 90403, 25916, 18736, 170891, 162004, 153201, 138947, 11398
`H06`	RAS Obs. Mayhill in New Mexico, 1 in MPEC 2007-Y22 -- C/2007 Y1
`H062`	Robert Hutsebaut in Belgium via RAS Obs. Mayhill in New Mexico, 2 in MPECs 2007-Y28 & 2007-Y29 -- 2007 YN1, 2007 YM1
`461`	SZTE Asteroid Program (SZTE) in Hungary, 4 in MPECs 2007-Y20, 2007-Y21 & 2007-Y22 -- 2007 YZ, C/2007 Y1, 2007 TG8, 2007 SE11
`B04`	Saint-Barthelemy Obs. in Italy, 1 in MPEC 2007-Y28 -- 2007 YM1
`434`	San Benedetto Po Obs. in Italy, 1 in MPEC 2007-Y21 -- 153591
`691`	Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2007-Y21 & 2007-Y29 -- 2007 YN1, 2005 YY128, 85628, 23548
`291`	Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2007-Y21 & 2007-Y24 -- 2007 YG1, 2007 YG, 2007 XZ9, 2007 XP3, 2007 XK11, 2007 XJ16, 2007 XF18, 2007 XB10, 2007 WV4, 2007 VK184, 2007 NS4

Impact Risk Monitoring on 18 December '07

**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 now 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

2007 YG1	JPL Sentry	2330	2020-2107	24	6.2e-09	-3.97	-4.51	0	JPL: "Analysis based on 18 observations spanning 1.9184 days (2007-Dec-16.45543 to 2007-Dec-18.37382)." Diameter approximately 1.386 km. from mean, weighted H=17.0.

2007 YZ	JPL Sentry	1525	R E M O V E D						JPL #2 for the day: Risk listing removed at 1512 UTC.

2007 YM	NEODyS	1604	2011-2089	90	1.1e-05	-5.09	-5.87	0	NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2007/12/17.397 to 2007/12/17.525."
2007 YM	JPL Sentry	0158	2010-2106	122	3.9e-06	-5.83	-6.42	0	JPL: "Analysis based on 12 observations spanning .12805 days (2007-Dec-17.39661 to 2007-Dec-17.52466)." Diameter approximately 0.020 km. from mean, weighted H=26.1.

2007 YJ	JPL Sentry	1446	R E M O V E D						JPL #2 for the day: Risk listing removed at 1424 UTC.

2007 YG	JPL Sentry	1820	R E M O V E D						JPL: Risk listing removed at 1803 UTC.

2007 XF25	NEODyS	2033	2014-2088	37	7.18e-08	-5.03	-5.39	0	NEODyS: "Based on 8 optical observations (of which 0 are rejected as outliers) from 2007/12/15.327 to 2007/12/17.427."
2007 XF25	JPL Sentry	1446	2024-2101	33	2.8e-08	-5.47	-6.28	0	JPL: "Analysis based on 8 observations spanning 2.0999 days (2007-Dec-15.32609 to 2007-Dec-17.42596)." Diameter approximately 0.237 km. from mean, weighted H=20.8.

2007 XF18	JPL Sentry	1446	R E M O V E D						JPL: Risk listing removed at 1341 UTC.

2007 XJ16	NEODyS	1604	R E M O V E D
2007 XJ16	JPL Sentry	1446	R E M O V E D						JPL: Risk listing removed at 1251 UTC.

2007 XK11	JPL Sentry	1637	2064-2101	2	1.3e-07	-4.23	-4.28	0	JPL: "Analysis based on 42 observations spanning 11.991 days (2007-Dec-06.0886 to 2007-Dec-18.07966)." Diameter approximately 0.496 km. from mean, weighted H=19.2.
2007 XK11	NEODyS	1446	2045-2064	2	1.07e-07	-4.28	-4.29	0	NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2007/12/06.089 to 2007/12/18.080."

2007 XB10	JPL Sentry	1446	R E M O V E D						JPL: Risk listing removed at 1214 UTC.
2007 XB10	NEODyS	1446	R E M O V E D

2007 XZ9	NEODyS	1604	2056-2089	4	1.52e-06	-5.78	-5.96	0	NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2007/12/04.195 to 2007/12/18.184."
2007 XZ9	JPL Sentry	1446	2056-2089	5	1.6e-06	-5.75	-5.94	0	JPL: "Analysis based on 41 observations spanning 13.990 days (2007-Dec-04.19408 to 2007-Dec-18.18365)." Diameter approximately 0.037 km. from mean, weighted H=24.8.

2007 XP3	JPL Sentry	1759	R E M O V E D						JPL: Risk listing removed at 1728 UTC.
2007 XP3	NEODyS	1446	R E M O V E D

2007 VK184	JPL Sentry	2259	2048-2057	4	3.3e-04	-1.85	-1.85	1	JPL: "Analysis based on 95 observations spanning 35.987 days (2007-Nov-12.13904 to 2007-Dec-18.1258)." Diameter approximately 0.130 km. from mean, weighted H=22.0.
2007 VK184	NEODyS	1446	2048-2057	3	3.22e-04	-1.86	-1.87	1	NEODyS: "Based on 96 optical observations (of which 1 are rejected as outliers) from 2007/11/12.140 to 2007/12/18.134. NOTE: The Virtual Impactor in 2048/06/03.088 in the table above is rated as Torino Scale 1."

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 18 December '07

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

2330	Noted that JPL Sentry has posted 2007 YG1 as an impact risk - see above
2259	Noted that JPL Sentry has updated its 2007 VK184 risk assessment - see above Grabbed MPEC 2007-Y29 - 2007 YN1 - see above
2232	Grabbed MPEC 2007-Y28 - 2007 YM1 - see above
2159	Grabbed MPEC 2007-Y27 - 2007 MB24 - see above
2033	Noted that NEODyS has posted 2007 XF25 as an impact risk - see above Grabbed MPEC 2007-Y23 - 2007 YF1 - see above Grabbed MPEC 2007-Y24 - 2007 YG1 - see above Grabbed MPEC 2007-Y25 - 2007 YH1 - see above Grabbed MPEC 2007-Y26 - 2007 YJ1 - see above
1820	Noted that JPL Sentry has removed 2007 YG as an impact risk - see above Grabbed MPEC 2007-Y22 - Comet C/2007 Y1 (LINEAR) - see above
1759	Noted that JPL Sentry has removed 2007 XP3 as an impact risk - see above
1637	Noted that JPL Sentry has updated its 2007 XK11 risk assessment - see above
1604	Noted that NEODyS has removed 2007 XJ16 as an impact risk - see above Noted that NEODyS has updated its 2007 XZ9 risk assessment - see above Noted that NEODyS has posted 2007 YM as an impact risk - see above
1525	Noted that JPL Sentry has removed 2007 YZ as an impact risk - see above
1446	Noted that NEODyS has updated its 2007 VK184 risk assessment - see above Noted that JPL Sentry has removed 2007 XB10 as an impact risk - see above Noted that NEODyS has removed 2007 XB10 as an impact risk - see above Noted that JPL Sentry has removed 2007 XF18 as an impact risk - see above Noted that JPL Sentry has posted 2007 XF25 as an impact risk - see above Noted that JPL Sentry has removed 2007 XJ16 as an impact risk - see above Noted that NEODyS has updated its 2007 XK11 risk assessment - see above Noted that NEODyS has removed 2007 XP3 as an impact risk - see above Noted that JPL Sentry has updated its 2007 XZ9 risk assessment - see above Noted that JPL Sentry has removed 2007 YJ as an impact risk - see above Noted that JPL Sentry has posted 2007 YZ as an impact risk - see above Grabbed MPEC 2007-Y21 - Daily Orbit Update - see above
0556	Grabbed MPEC 2007-Y19 - 2007 XF25 - see above Grabbed MPEC 2007-Y20 - 2007 YZ - see above
0426	Noted that JPL Sentry has posted 2007 YJ as an impact risk - see above
0158	Noted that JPL Sentry has posted 2007 YM as an impact risk - see above

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