2008-01-19 Tracking News

Contents on 19 January '08

IAU Minor Planet Center
- NEOCP Activity -- 15 listings: 8 new, 7 updated
- New MPECs -- four MPECs
- Observers -- 23 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 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 19 January '08

The MPC's NEO Confirmation Page has 15 listings: 8 new, 7 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had eight new and seven updated listings. Of these, twelve were "one nighters." So far The Tracking News has counted a total of 22 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 19 January '08

Minor Planet Electronic Circulars

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

MPEC 2008-B17 time-stamped "07:10 UT" - Daily Orbit Update - see below
MPEC 2008-B18 time-stamped "20:00 UT" - Comet P/2008 A2 (LINEAR) - see below
MPEC 2008-B19 time-stamped "20:16 UT" - 2004 BG41 = 2008 AA31 - see below
MPEC 2008-B20 time-stamped "21:01 UT" - 2004 XN50

MPEC 2008-B20 - "21:01 UT" - 2004 XN50

K04X50N 2004 XN50 (q=0.373 AU, Earth MOID=3.0 LD, H=18.8 ~589m) from David Tholen's team on Mauna Kea (Jan. 8.47-48p2 at R=23.0 & 9.50p2 at R=22.7-8)

MPEC 2008-B19 - "20:16 UT" - 2004 BG41 = 2008 AA31

K04B41G 2004 BG41 (small asteroid, Q=4.054 AU, Earth MOID=5.1 LD, H=24.4 ~45m) from Jim Young via Table Mtn. Obs. (Jan. 18.44p2)

MPEC 2008-B18 - "20:00 UT" - Comet P/2008 A2 (LINEAR)

PK08A020 P/2008 A2 (q=1.306 AU, Q=5.076 AU, TP=2008 June 12.932 TT) from LINEAR (Jan. 13.22-26p4 & 16.20-26p5), Table Mtn. Obs. (Jan. 14.23-25p4, 16.24-26p4, 18.19-22p4 & 19.10-16p4), Astronomical Research Obs. (ARO) (Jan. 15.14-15p3 & 16.07-09p3), the Mt. Lemmon Survey (MLS) (Jan. 15.19-21p4), Junk Bond Obs. (Jan. 15.20-27p4), RAS Obs. Mayhill (Jan. 15.40-41p2 & 16.39-40p2), Alter Satzberg Obs. (Jan. 15.87-89p4), Great Shefford Obs. (Jan. 16.04-05p3), Kanab Obs. (Jan. 17.27-30p2), Faulkes Telescope North (Jan. 17.53-54p2), Gnosca Obs. (Jan. 17.76-77p2), Modra Obs. (Jan. 18.89-90p2), and Farpoint Obs. (Jan. 19.30-32p3)

<< DOU on 19 Jan. '08 >> MPEC 2008-B17 - "07:10 UT" - Daily Orbit Update

Observations of risk-listed objects
K08A33N 2008 AN33 (Q=4.370 AU, arc=3 days, H=18.8 ~589m) from the Spacewatch 1.8m telescope (Jan. 18.55-56p3)
K08A33K 2008 AK33 (arc=3 days, H=20.7 ~245m) from Spacewatch 1.8m (Jan. 18.12p3) and Young/Table Mtn. (Jan. 18.15-18p4)
K08A33G 2008 AG33 (arc=6 days, H=19.3 ~467m) from Spacewatch 1.8m (Jan. 18.48-49p3)
K08A04F 2008 AF4 (arc=9 days, H=19.7 ~389m) from Desert Moon Obs. (Jan. 18.37-38p5), MLS (Jan. 18.57p4), and Greiner Research Obs. (Jan. 19.21-22p20)
K07Y56Q 2007 YQ56 (arc=19 days, H=19.8 ~371m) from Desert Moon Obs. (Jan. 18.10-13p3) and Spacewatch 1.8m (Jan. 19.11p3)
Observations of recently (no longer) risk-listed objects
K08A33L 2008 AL33 (small asteroid, arc=3 days, H=22.8 ~93m) from the Spacewatch 0.9m telescope (Jan. 18.24-28p6)
K08A04E 2008 AE4 (small asteroid, arc=8 days, H=23.9 ~56m) from MLS (Jan. 18.19-20p4)
K08A00E 2008 AE (arc=18 days, H=19.6 ~407m) from Desert Moon Obs. (Jan. 18.35-36p3), LINEAR (Jan. 18.39-45p5), University Hills Obs. (Jan. 18.47p3), and Greiner Research Obs. (Jan. 19.23-24p3)
K07Y56V 2007 YV56 (arc=18 days, H=21.0 ~214m) from Desert Moon Obs. (Jan. 18.23-24p3)
Observations of small asteroids (H>22.0)
K08B00E 2008 BE (arc=1 day, H=22.7 ~98m) from Kanab Obs. (Jan. 18.43p1 & 18.47p1)
K08B00C 2008 BC (arc=2 days, H=24.1 ~51m) from MLS (Jan. 18.34-35p4)
K08A31A 2008 AA31 (Q=4.055 AU, arc=6 days, H=24.2 ~49m) from Desert Moon Obs. (Jan. 18.40-42p3) and the Catalina Sky Survey (CSS) (Jan. 18.42-44p4)
K08A28U 2008 AU28 (arc=7 days, H=24.8 ~37m) from MLS (Jan. 18.18-19p3)
Observations of other objects
K08A32F 2008 AF32 (arc=5 days, H=20.9 ~224m) from Young/Table Mtn. (Jan. 18.34-35p2 & 18.42-46p2) and MLS (Jan. 18.55-56p4)
K08A28V 2008 AV28 (arc=30 days, H=19.5 ~426m) from Spacewatch 1.8m (Jan. 18.39-40p3)
K08A28T 2008 AT28 (arc=8 days, H=18.4 ~708m) from Spacewatch 1.8m (Jan. 18.31-32p3)
K08A26U 2008 AU26 (arc=19 days, H=21.0 ~214m) from Desert Moon Obs. (Jan. 18.27-33p3)
K08A01X 2008 AX1 (arc=10 days, H=21.3 ~186m) from Desert Moon Obs. (Jan. 18.16-19p3)
K08A01G 2008 AG1 (arc=12 days, H=21.2 ~195m) from Spacewatch 1.8m (Jan. 18.40-41p3)
K07Y01F 2007 YF1 (Q=4.002 AU, arc=33 days, H=18.7 ~616m) from Spacewatch 1.8m (Jan. 18.19-20p3)
K07T24U 2007 TU24 (arc=99 days, H=20.2 ~309m) from Desert Moon Obs. (Jan. 18.07-08p3)
K07P27V 2007 PV27 (arc=157 days, H=20.2 ~309m) from Spacewatch 1.8m (Jan. 18.50p3 at V=22.3)
K06B55G 2006 BG55 (arc=3 opp, H=18.2 ~776m) from Spacewatch 1.8m (Jan. 18.42-43p3)
K05T45U 2005 TU45 (arc=3 opp, H=17.0 ~1.35 km) from LINEAR (Jan. 18.20-25p5) and Madonna di Dossobuono Obs. (Jan. 18.89p3)
K05F03C 2005 FC3 (arc=3 opp, H=19.1 ~513m) from Spacewatch 1.8m (Jan. 18.52-53p3)
K04Q00Q 2004 QQ (arc=5 opp, H=16.7 ~1.55 km) from MLS (Jan. 18.07-08p4)
K04D02G 2004 DG2 (arc=4 opp, H=18.6 ~645m) from MLS (Jan. 18.40-42p4)
K04D00C 2004 DC (arc=2 opp, H=18.2 ~776m) from MLS (Jan. 18.47-48p4)
K04B41H 2004 BH41 (arc=3 opp, H=19.3 ~467m) from MLS (Jan. 18.40-42p4)
K04B11L 2004 BL11 (q=0.315 AU, arc=4 opp, H=19.3 ~467m) from Spacewatch 1.8m (Jan. 19.09-10p2)
K03B35T 2003 BT35 (i=57.3°, arc=3 opp, H=18.6 ~645m) from LINEAR (Jan. 18.28-32p4)
K03A18K 2003 AK18 (arc=3 opp, H=19.7 ~389m) from Desert Moon Obs. (Jan. 18.46-50p3)
K03A03A 2003 AA3 (arc=3 opp, H=20.2 ~309m) from Spacewatch 1.8m (Jan. 19.08-09p2)
J93T02Q 1993 TQ2 (arc=2 opp, H=19.9 ~355m) from Madonna di Dossobuono Obs. (Jan. 18.91p3)
H2722 172722 2004 BV102 from LINEAR (Jan. 18.30-32p3)
G2510 162510 2000 QW69 from Desert Moon Obs. (Jan. 18.53-54p4)
F4589 154589 2003 MX2 from MLS (Jan. 18.32-34p4)
99935 99935 2002 AV4 from Madonna di Dossobuono Obs. (Jan. 18.75p3)
68359 68359 2001 OZ13 from Mataro Obs. (Jan. 18.87p2 & 18.95p1)
68063 68063 2000 YJ66 from Stia Obs. (Jan. 18.91-93p3)
54660 54660 2000 UJ1 from MLS (Jan. 18.07-09p4)
35107 35107 1991 VH from LINEAR (Jan. 18.47-50p3)
09172 9172 Abhramu (1989 OB) from Spacewatch 0.9m (Jan. 18.11-14p3)
07889 7889 1994 LX from CSS (Jan. 18.50-52p3)
07092 7092 Cadmus (1992 LC) from CSS (Jan. 18.09-12p4)
05587 5587 1990 SB from CSS (Jan. 18.33-35p4)
03553 3553 Mera (1985 JA) from CSS (Jan. 18.15-18p4)

Observers on 19 January '08

A total of 23 observing facilities appear in today's MPECs.

Code	Observer / observatory
`B03`	Alter Satzberg Obs. in Austria, 1 in MPEC 2008-B18 -- P/2008 A2
`H55`	Astronomical Research Obs. in Illinois, 1 in MPEC 2008-B18 -- P/2008 A2
`703`	Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2008-B17 -- 2008 AA31, 7889, 7092, 5587, 3553
`448`	Desert Moon Obs. in New Mexico, 10 in MPEC 2008-B17 -- 2008 AX1, 2008 AU26, 2008 AF4, 2008 AE, 2008 AA31, 2007 YV56, 2007 YQ56, 2007 TU24, 2003 AK18, 162510
`734`	Farpoint Obs. in Kansas, 1 in MPEC 2008-B18 -- P/2008 A2
`F65`	Faulkes Telescope North in Hawaii, 1 in MPEC 2008-B18 -- P/2008 A2
`143`	Gnosca Obs. in Switzerland, 1 in MPEC 2008-B18 -- P/2008 A2
`J95`	Great Shefford Obs. in England, 1 in MPEC 2008-B18 -- P/2008 A2
`H51`	Greiner Research Obs. in Wisconsin, 2 in MPEC 2008-B17 -- 2008 AF4, 2008 AE
`701`	Junk Bond Obs. in Arizona, 1 in MPEC 2008-B18 -- P/2008 A2
`682`	Kanab Obs. in Utah, 2 in MPECs 2008-B17 & 2008-B18 -- 2008 BE, P/2008 A2
`704`	LINEAR in New Mexico, 6 in MPECs 2008-B17 & 2008-B18 -- 2008 AE, P/2008 A2, 2005 TU45, 2003 BT35, 35107, 172722
`560`	Madonna di Dossobuono Obs. in Italy, 3 in MPEC 2008-B17 -- 2005 TU45, 1993 TQ2, 99935
`A06`	Mataro Obs. in Spain, 1 in MPEC 2008-B17 -- 68359
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-B20 -- 2004 XN50
`118`	Modra Obs. in Slovakia, 1 in MPEC 2008-B18 -- P/2008 A2
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2008-B17 & 2008-B18 -- 2008 BC, 2008 AU28, 2008 AF4, 2008 AF32, 2008 AE4, P/2008 A2, 2004 QQ, 2004 DG2, 2004 DC, 2004 BH41, 54660, 154589
`H06`	RAS Obs. Mayhill in New Mexico, 1 in MPEC 2008-B18 -- P/2008 A2
`691`	Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2008-B17 -- 2008 AL33, 9172
`291`	Spacewatch 1.8m telescope in Arizona, 13 in MPEC 2008-B17 -- 2008 AV28, 2008 AT28, 2008 AN33, 2008 AK33, 2008 AG33, 2008 AG1, 2007 YQ56, 2007 YF1, 2007 PV27, 2006 BG55, 2005 FC3, 2004 BL11, 2003 AA3
`A78`	Stia Obs. in Italy, 1 in MPEC 2008-B17 -- 68063
`673`	Table Mtn. Obs. in southern California, 1 in MPEC 2008-B18 -- P/2008 A2
`6735`	Jim Young via Table Mtn. Obs. in southern California, 3 in MPECs 2008-B17 & 2008-B19 -- 2008 AK33, 2008 AF32, 2004 BG41
`G72`	University Hills Obs. in southern California, 1 in MPEC 2008-B17 -- 2008 AE

Impact Risk Monitoring on 19 January '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS at 2354 and JPL at 2355 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 AK33	JPL Sentry	2355	2010-2092	15	1.5e-08	-4.60	-4.85	0	JPL: "Analysis based on 32 observations spanning 3.1023 days (2008-Jan-15.08003 to 2008-Jan-18.1823)." Diameter approximately 0.260 km. from mean, weighted H=20.6.

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 19 January '08

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

2355	Noted that JPL Sentry has updated its 2008 AK33 risk assessment - see above
2103	Grabbed MPEC 2008-B20 - 2004 XN50 - see above
2031	Grabbed MPEC 2008-B18 - Comet P/2008 A2 (LINEAR) - see above Grabbed MPEC 2008-B19 - 2004 BG41 = 2008 AA31 - see above
2000	Grabbed MPEC 2008-B17 - Daily Orbit Update - see above

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