2008-01-01 Tracking News

Contents on 1 January '08

Radar Astrometry -- one object
IAU Minor Planet Center
- NEOCP Activity -- 20 listings: 4 new, 16 updated
- New MPECs -- four MPECs
- Observers -- nineteen observing facilities
Impact Risk Monitoring -- one object
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.

Radar Astrometry on 1 January '08

Radar observation of one object

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

Data addition noted at 2105 UTC when the database was dated 1 Jan.

2007 XH16 from Arecibo at Dec. 24.03 (velocity) & 24.05 (range)

NEOCP Activity on 1 January '08

The MPC's NEO Confirmation Page has 20 listings: 4 new, 16 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new and sixteen updated listings. Of these, six were "one nighters." The Tracking News counted a total of 22 objects listed on the NEOCP at some point on this day.

New MPECs on 1 January '08

Minor Planet Electronic Circulars

There were four MPECs issued this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-A01 time-stamped "07:08 UT" - Daily Orbit Update - see below
MPEC 2008-A02 time-stamped "15:31 UT" - 2007 TZ417 - see below
MPEC 2008-A03 time-stamped "15:43 UT" - 2007 TA418 - see below
MPEC 2008-A04 time-stamped "15:58 UT" - 2007 RM283, 2007 TB418, 2007 TC418, 2007 TD418, 2007 VJ302, 2007 VK302

MPEC 2008-A04 - "15:58 UT" - 2007 RM283, 2007 TB418, 2007 TC418, 2007 TD418, 2007 VJ302, 2007 VK302

K07VU2K 2007 VK302 was discovered at 0249 UT on 11 Nov. 2007 by Cerro Tololo Inter-American Obs. (CTIO), which observed it at Nov. 11.12p1 at R=23.2, 13.07-10p2 at I=23.0-6, 15.07-11p2 at I=22.9-23.0, 17.10-11p2 at I=23.0-4, 19.26p1 at R=23.3, Dec. 3.18p1 at R=23.4, 7.08-11p2 at I=22.9-23.5, and 13.13p1 at R=23.5.
K07VU2J 2007 VJ302 was discovered at 0451 UT on 3 Nov. 2007 by the CTIO, which observed it at Nov. 3.20p1 at R=22.5, 7.20-23p2 at R=22.6, 13.03-04p2 at R=22.8, 15.03-06p2 at I=22.1-6, 17.05p1 at R=22.8, Dec. 3.14-16p2 at I=22.1-8, and 7.04-07p2 at I=22.1-8.
K07Tf8D 2007 TD418 was discovered at 0608 UT on 8 Oct. 2007 by the CTIO, which observed it at 2007 Oct. 8.26p1 at R=23.6, 2007 Oct. 10.32p1 at R=23.5, Nov. 3.25p1 at R=23.2, 7.26-28p2 at I=23.1-6, 11.13p1 at R=23.5, 13.07-11p2 at I=23.1-7, 15.07-10p2 at I=23.0-8, and 17.10p1 at R=23.6.
K07Tf8C 2007 TC418 was discovered at 0544 UT on 6 Oct. 2007 by the CTIO, which observed it at 2007 Oct. 6.24p1 at I=22.1, 2007 Oct. 10.26p1 at I=22.6, Nov. 11.04-06p2 at I=22.7-23.1, 13.04-06p2 at I=22.7-23.3, 15.03p1 at R=23.2, and 17.04-06p2 at I=22.6-23.2.
K07Tf8B 2007 TB418 was discovered at 0517 UT on 4 Oct. 2007 by the CTIO, which observed it at 2007 Oct. 4.22p1 at R=23.2, Nov. 13.04-05p2 at I=22.9-23.4, 15.03-04p2 at I=22.9-23.3, 17.03p1 at R=23.4, 17.07p1 at I=22.5, and Dec. 1.12p1 at R=23.3.
K07RS3M 2007 RM283 was discovered at 0714 UT on 8 Sept. 2007 by the CTIO, which observed it at 2007 Sept. 8.30p1 at R=22.1, 2007 Sept. 11.31p1 at R=22.1, 2007 Sept. 14.31p1, 2007 Sept. 17.29p1 at R=22.1, 2007 Sept. 20.32p1, 2007 Oct. 2.24-27p2, 2007 Oct. 4.23-26p2 at R=22.2, 2007 Oct. 6.22-25p2 at R=22.1, 2007 Oct. 8.22p1 at R=22.2, and 2007 Oct. 10.23-27p2 at R=22.2.

MPEC 2008-A03 - "15:43 UT" - 2007 TA418

K07Tf8A 2007 TA418 (q=35.892 AU, Q=109.134 AU, H=7.2 ~123 km) was discovered at 0800 UT on 4 Oct. 2007 by the CTIO, which observed it at 2006 Sept. 14.35p1 at R=22.3, 2006 Sept. 16.39p1 at R=22.6, 2007 Oct. 4.33p1 at R=22.6, 2007 Oct. 8.34-38p2 at I=22.4-6, 2007 Oct. 14.34-36p2 at I=22.2-6, Nov. 3.33p1 at R=22.6, 5.32-35p2 at R=22.6, 7.35p1 at R=22.6, 9.14-16p2 at R=22.1-7, 11.15p1 at R=22.7, 15.15-16p2 at R=22.2-9, 17.14p1 at R=22.5, 19.29-33p2 at I=22.2-6, Dec. 1.23p1 at R=22.7, 5.15-17p2 at I=22.3-7, 7.17p1 at R=22.7, 9.12-14p2 at I=22.2-6, and 11.12-14p2 at I=22.2-7.

MPEC 2008-A02 - "15:31 UT" - 2007 TZ417

K07Tf7Z 2007 TZ417 (KBO, q=35.803 AU, Q=47.324 AU, H=7.5 ~107 km) was discovered at 0726 UT on 4 Oct. 2007 by the CTIO, which observed it at 2006 Sept. 25.33p1 at I=22.6, 2006 Oct. 17.28p1 at R=23.0, 2007 Oct. 4.31p1 at I=22.5, 2007 Oct. 8.26-30p2 at I=22.8-23.2, 2007 Oct. 10.33p1 at R=22.9, 2007 Oct. 12.28p1 at R=22.9, 2007 Oct. 14.26p1 at R=22.8, Nov. 5.25-28p2 at I=22.5-23.1, 11.09p1 at R=23.1, 13.08p1 at R=23.1, 15.08-11p2 at I=22.9-23.2, 17.07p1 at R=23.1, and 17.17p1 at I=22.8.

<< DOU on 1 Jan. '08 >> MPEC 2008-A01 - "07:08 UT" - Daily Orbit Update

Observations of risk-listed objects
K07Y02B 2007 YB2 (Q=5.003 AU, arc=13 days, H=18.3 ~741m) from the Spacewatch 1.8m telescope (Dec. 31.40-41p3)
Observations of recently (no longer) risk-listed objects
K07Y00Z 2007 YZ (arc=15 days, H=19.8 ~371m) from Petit Jean Mtn. South Obs. (PJMSO) (Dec. 31.39p7), Hamamatsu-Yuto Obs. (Dec. 31.50-55p5 & 31.65-68p4), and Capannoli Obs. (Jan. 1.15-17p2)
K07Y00G 2007 YG (small asteroid, arc=15 days, H=23.1 ~81m) from Spacewatch 1.8m (Dec. 31.35-36p3)
K07X18F 2007 XF18 (i=59.5°, arc=19 days, H=20.5 ~269m) from Astronomical Research Obs. (ARO) (Dec. 31.03-05p3)
K07X11K 2007 XK11 (Q=4.629 AU, arc=25 days, H=19.2 ~490m) from Spacewatch 1.8m (Dec. 31.07-08p2)
K07X10B 2007 XB10 (i=41.4°, arc=26 days, H=17.5 ~1.07 km) from Spacewatch 1.8m (Dec. 31.34-35p3 at V=22.3)
Observations of small asteroids (H>22.0)
K07X03O 2007 XO3 (arc=27 days, H=22.9 ~89m) from Mt. John Obs. (Dec. 31.56-57p3)
K07W05D 2007 WD5 (Q=4.074 AU, arc=53 days, H=24.3 ~47m) from Magdalena Ridge Obs. (MRO) (Dec. 29.18p1 at R=23.5, 31.11p1 at R=24.3 & 31.20-23p2 at R=23.3-24.2)
K07V03H 2007 VH3 (arc=59 days, H=22.7 ~98m) from PJMSO (Dec. 31.32-33p6)
K04E20O 2004 EO20 (arc=2 opp, H=22.1 ~129m) from Spacewatch 1.8m (Dec. 31.44-45p2 & 31.49-51p3 at V=22.2)
Observations of almost-small asteroids (21.7<H<=22.0)
K07VI4H 2007 VH184 (Q=4.092 AU, arc=50 days, H=21.9 ~141m) from ARO (Dec. 31.12-17p3)
Observations of other objects
K07Y01F 2007 YF1 (Q=4.000 AU, arc=15 days, H=18.6 ~645m) from the Catalina Sky Survey (CSS) (Dec. 31.38-40p4)
K07Y00K 2007 YK (arc=15 days, H=17.5 ~1.07 km) from Desert Moon Obs. (Dec. 31.38-40p3)
K07Y00H 2007 YH (arc=15 days, H=20.2 ~309m) from PJMSO (Dec. 31.36p5)
K07X16H 2007 XH16 (arc=23 days, H=19.7 ~389m) from PJMSO (Dec. 31.04-05p8) and San Vito Obs. (Dec. 31.71p3)
K07X03T 2007 XT3 (arc=26 days, H=21.5 ~170m) from ARO (Dec. 31.04p3)
K07W55F 2007 WF55 (arc=30 days, H=19.1 ~513m) from Green Island Obs. (Dec. 30.68p1 & 30.75p1) and PJMSO (Dec. 31.31p6)
K07VI6H 2007 VH186 (arc=50 days, H=20.2 ~309m) from ARO (Dec. 31.05-06p3)
K07VD8C 2007 VC138 (arc=52 days, H=19.3 ~467m) from Mt. John Obs. (Dec. 31.59-61p3)
K07VD7W 2007 VW137 (arc=53 days, H=18.1 ~812m) from Desert Moon Obs. (Dec. 31.22-25p3)
K07V07X 2007 VX7 (arc=57 days, H=19.5 ~426m) from ARO (Dec. 31.06p2)
K07T24U 2007 TU24 (arc=81 days, H=20.1 ~323m) from Desert Moon Obs. (Dec. 31.06-08p3)
K07T15G 2007 TG15 (arc=84 days, H=19.5 ~426m) from Green Island Obs. (Dec. 30.68p1 & 30.76p1), LINEAR (Dec. 31.21-26p5), and CSS (Dec. 31.22-24p4)
K07S11V 2007 SV11 (arc=95 days, H=18.0 ~851m) from Desert Moon Obs. (Dec. 31.12-18p3)
K07S06P 2007 SP6 (arc=101 days, H=18.2 ~776m) from PJMSO (Dec. 31.40-41p5)
K06H05X 2006 HX5 (arc=2 opp, H=19.4 ~446m) from Spacewatch 1.8m (Dec. 31.42-43p3)
K06E52V 2006 EV52 (arc=3 opp, H=16.8 ~1.48 km) from Spacewatch 1.8m (Dec. 31.47-49p2)
K05YC8Y 2005 YY128 (arc=3 opp, H=18.3 ~741m) from the Spacewatch 0.9m telescope (Dec. 31.19-23p3)
K05X08K 2005 XK8 (arc=2 opp, H=19.8 ~371m) from PJMSO (Dec. 31.29-30p6)
K05X01D 2005 XD1 (arc=2 opp, H=19.2 ~490m) from Green Island Obs. (Dec. 30.72p1 & 30.78p1) and PJMSO (Dec. 31.30p5)
K05W56J 2005 WJ56 (arc=3 opp, H=17.9 ~891m) from PJMSO (Dec. 31.43-44p6) and Hamamatsu-Yuto Obs. (Dec. 31.70-74p4)
K05T45U 2005 TU45 (arc=3 opp, H=17.0 ~1.35 km) from PJMSO (Dec. 31.41-43p5)
K05N07B 2005 NB7 (arc=3 opp, H=18.6 ~645m) from Schiaparelli Obs. (Dec. 31.02p2)
K05B02E 2005 BE2 (arc=2 opp, H=18.2 ~776m) from Spacewatch 1.8m (Dec. 31.39-40p3)
K03B84H 2003 BH84 (arc=2 opp, H=16.9 ~1.41 km) from Green Island Obs. (Dec. 30.71p1 & 30.78p1)
K03A01D 2003 AD1 (arc=3 opp, H=18.2 ~776m) from CSS (Dec. 31.52-54p4)
J93T02Q 1993 TQ2 (arc=2 opp, H=20.0 ~339m) from Green Island Obs. (Dec. 30.69p1 & 30.77p1) and PJMSO (Dec. 31.34-35p5)
J89A00Z 1989 AZ (arc=3 opp, H=19.5 ~426m) from LINEAR (Dec. 31.07-12p5)
H2718 172718 2004 BD85 from Spacewatch 0.9m (Dec. 31.08-11p3)
H0903 170903 2004 WS2 from the Mt. Lemmon Survey (MLS) (Dec. 31.09-11p4)
H0502 170502 2003 WM7 from CSS (Dec. 31.10-12p4)
G2038 162038 1996 DH from MLS (Dec. 31.41-43p4)
F3591 153591 2001 SN263 from LINEAR (Dec. 31.20-25p9)
F2742 152742 1998 XE12 from CSS (Dec. 31.16-18p4)
D8971 138971 2001 CB21 from CSS (Dec. 31.10-12p4)
D8947 138947 2001 BA40 from MLS (Dec. 31.23-25p4) and PJMSO (Dec. 31.33p5)
D6793 136793 1997 AQ18 from LINEAR (Dec. 31.26-31p5) and PJMSO (Dec. 31.34p5)
90403 90403 2003 YE45 from PJMSO (Dec. 31.37-38p5)
86324 86324 1999 WA2 from San Vito Obs. (Dec. 31.71-72p2)
68359 68359 2001 OZ13 from La Murta Obs. (Dec. 31.02p3), LINEAR (Dec. 31.34-39p5), and PJMSO (Dec. 31.37p5)
68063 68063 2000 YJ66 from Spacewatch 0.9m (Dec. 31.18-22p6)
66272 66272 1999 JW6 from La Murta Obs. (Dec. 30.82-83p3)
34613 34613 2000 UR13 from Spacewatch 0.9m (Dec. 31.24-28p6) and LINEAR (Dec. 31.46-51p4)
22099 22099 2000 EX106 from CSS (Dec. 31.48-50p4)
19764 19764 2000 NF5 from MLS (Dec. 31.17-18p4)
18736 18736 1998 NU from LINEAR (Dec. 31.20-26p5)
17182 17182 1999 VU from CSS (Dec. 31.10-12p4)
09172 9172 Abhramu (1989 OB) from LINEAR (Dec. 31.40-45p5)
03288 3288 Seleucus (1982 DV) from CSS (Dec. 31.38-40p4)
02102 2102 Tantalus (1975 YA) from the Siding Spring Survey (SSS) (Dec. 31.52-54p3)

Observers on 1 January '08

Nineteen observing facilities appeared in this day's MPECs.

Code	Observer / observatory
`251`	Arecibo in Puerto Rico, 1 in radar -- 2007 XH16
`H55`	Astronomical Research Obs. (ARO) in Illinois, 5 in MPEC 2008-A01 -- 2007 XT3, 2007 XF18, 2007 VX7, 2007 VH186, 2007 VH184
`B09`	Capannoli Obs. in Italy, 1 in MPEC 2008-A01 -- 2007 YZ
`703`	Catalina Sky Survey (CSS) in Arizona, 9 in MPEC 2008-A01 -- 2007 YF1, 2007 TG15, 2003 AD1, 22099, 17182, 170502, 152742, 138971, 3288
`807`	Cerro Tololo Inter-American Obs. (CTIO) in Chile, 8 in MPECs 2008-A02, 2008-A03 & 2008-A04 -- 2007 VK302, 2007 VJ302, 2007 TZ417, 2007 TD418, 2007 TC418, 2007 TB418, 2007 TA418, 2007 RM283
`448`	Desert Moon Obs. in New Mexico, 4 in MPEC 2008-A01 -- 2007 YK, 2007 VW137, 2007 TU24, 2007 SV11
`B34`	Green Island Obs. in Cyprus, 5 in MPEC 2008-A01 -- 2007 WF55, 2007 TG15, 2005 XD1, 2003 BH84, 1993 TQ2
`379`	Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2008-A01 -- 2007 YZ, 2005 WJ56
`704`	LINEAR in New Mexico, 8 in MPEC 2008-A01 -- 2007 TG15, 1989 AZ, 68359, 34613, 18736, 153591, 136793, 9172
`J76`	La Murta Obs. in Spain, 2 in MPEC 2008-A01 -- 68359, 66272
`H01`	Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2008-A01 -- 2007 WD5
`474`	Mt. John Obs. in New Zealand, 2 in MPEC 2008-A01 -- 2007 XO3, 2007 VC138
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 4 in MPEC 2008-A01 -- 19764, 170903, 162038, 138947
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 15 in MPEC 2008-A01 -- 2007 YZ, 2007 YH, 2007 XH16, 2007 WF55, 2007 VH3, 2007 SP6, 2005 XK8, 2005 XD1, 2005 WJ56, 2005 TU45, 1993 TQ2, 90403, 68359, 138947, 136793
`233`	San Vito Obs. in Italy, 2 in MPEC 2008-A01 -- 2007 XH16, 86324
`204`	Schiaparelli Obs. in Italy, 1 in MPEC 2008-A01 -- 2005 NB7
`E12`	Siding Spring Survey in New South Wales, 1 in MPEC 2008-A01 -- 2102
`691`	Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2008-A01 -- 2005 YY128, 68063, 34613, 172718
`291`	Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2008-A01 -- 2007 YG, 2007 YB2, 2007 XK11, 2007 XB10, 2006 HX5, 2006 EV52, 2005 BE2, 2004 EO20

Impact Risk Monitoring on 1 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

2007 YB2	JPL Sentry	2105	2043-2098	2	3.3e-08	-3.99	-4.00	0	JPL: "Analysis based on 58 observations spanning 13.068 days (2007-Dec-18.34552 to 2007-Dec-31.41369)." Diameter approximately 0.770 km. from mean, weighted H=18.2.
2007 YB2	NEODyS	1550	2043	1	3.67e-08	-3.96	-3.96	0	NEODyS: "Based on 58 optical observations (of which 0 are rejected as outliers) from 2007/12/18.346 to 2007/12/31.414."

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 1 January '08

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

2105	Noted that JPL Sentry has updated its 2007 YB2 risk assessment - see above Noted Radar Astrometry database addition
1621	Grabbed MPEC 2008-A04 - 2007 RM283, 2007 TB418, 2007 TC418, 2007 TD418, 2007 VJ302, 2007 VK302 - see above
1551	Grabbed MPEC 2008-A01 - Daily Orbit Update - see above
1550	Noted that NEODyS has updated its 2007 YB2 risk assessment - see above Grabbed MPEC 2008-A02 - 2007 TZ417 - see above Grabbed MPEC 2008-A03 - 2007 TA418 - see above

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