2008-03-26 Tracking News

Contents on 26 March '08

IAU Minor Planet Center
- NEOCP Activity -- one listing: 1 updated
- New MPECs -- two MPECs
Observers -- thirteen 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 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 26 March '08

The MPC's NEO Confirmation Page has 1 listing: 1 updated

When last checked at 2359 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one updated listing. This was a "one nighter."

New MPECs on 26 March '08

Minor Planet Electronic Circulars

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

MPEC 2008-F32 time-stamped "03:16 UT" - Comets C/2002 Q8, 2008 E4, 2008 F1 (SOHO) - see below
MPEC 2008-F33 time-stamped "06:07 UT" - Daily Orbit Update

<< DOU on 26 Mar. '08 >> MPEC 2008-F33 - "06:07 UT" - Daily Orbit Update

Observations of risk-listed objects
K08E09A 2008 EA9 (small asteroid, arc=19 days, H=27.8 ~9m) from the Spacewatch 1.8m telescope (March 25.23-26p3)
K08E07R 2008 ER7 (arc=20 days, H=19.9 ~355m) from Spacewatch 1.8m (March 25.28p3 & 26.24p3)
K08E05X 2008 EX5 (small asteroid, arc=21 days, H=23.8 ~59m) from Spacewatch 1.8m (March 25.38p2)
K08A04F 2008 AF4 (arc=76 days, H=19.7 ~389m) from Farpoint Obs. (March 26.17-21p4)
Observations of recently (no longer) risk-listed objects
K08E97Z 2008 EZ97 (arc=10 days, H=17.8 ~933m) from Spacewatch 1.8m (March 25.43p2)
K08E69D 2008 ED69 (i=36.3°, Q=5.063 AU, arc=12 days, H=16.7 ~1.55 km) from the Catalina Sky Survey (CSS) (March 23.44-46p4)
K08E01K 2008 EK1 (i=39.4°, arc=20 days, H=20.3 ~295m) from Astronomical Research Obs. (ARO) (March 24.11-13p3)
K08D05K 2008 DK5 (arc=26 days, H=21.4 ~178m) from ARO (March 24.17-18p3) and Spacewatch 1.8m (March 25.34-35p3)
K08D05J 2008 DJ5 (arc=25 days, H=19.9 ~355m) from program code "|" via La Silla (March 13.37p5) and ARO (March 24.15-16p3)
K08D00Y 2008 DY (Q=4.346 AU, arc=28 days, H=20.7 ~245m) from Silver Spring Obs. (March 25.21p1, 25.26p1, 25.30p1 & 25.35p1)
K08D00V 2008 DV (arc=27 days, H=18.1 ~812m) from ARO (March 24.08p3)
K08D00J 2008 DJ (arc=28 days, H=20.5 ~269m) from ARO (March 24.06-08p3)
K08D00E 2008 DE (arc=42 days, H=19.4 ~446m) from Petit Jean Mtn. South Obs. (PJMSO) (March 25.42-44p5)
Observations of small asteroids (H>22.0)
K08E85J 2008 EJ85 (arc=10 days, H=25.2 ~31m) from ARO (March 24.18-19p3)
K08E85E 2008 EE85 (arc=13 days, H=22.6 ~102m) from Silver Spring Obs. (March 25.12-16p3), Desert Moon Obs. (March 25.18-19p3), Farra d'Isonzo Obs. (March 25.82-85p2), and Verona Obs. (March 25.89p4)
K08E68Y 2008 EY68 (q=0.176 AU, arc=15 days, H=22.2 ~123m) from ARO (March 24.13-14p3) and Farra d'Isonzo Obs. (March 25.88-93p3)
K08E09E 2008 EE9 (arc=15 days, H=22.4 ~112m) from ARO (March 24.12-13p3)
K08E07Q 2008 EQ7 (arc=13 days, H=22.5 ~107m) from La Silla/code "|" (March 13.36p5)
K08C22D 2008 CD22 (arc=44 days, H=22.1 ~129m) from ARO (March 24.20-22p3)
K07X23A 2007 XA23 (arc=102 days, H=23.0 ~85m) from Spacewatch 1.8m (March 25.51-52p2)
Observations of almost-small asteroids (21.7<H<=22.0)
K08D05L 2008 DL5 (arc=26 days, H=21.9 ~141m) from Spacewatch 1.8m (March 25.40-42p3)
Observations of other objects
K08E85M 2008 EM85 (arc=12 days, H=19.7 ~389m) from PJMSO (March 25.35-36p7) and Verona Obs. (March 25.94-95p4)
K08E82N 2008 EN82 (arc=23 days, H=16.0 ~2.14 km, q=1.120 AU) from ARO (March 24.10-12p3) and Desert Moon Obs. (March 25.21-25p3)
K08E09M 2008 EM9 (q=0.293 AU, arc=16 days, H=17.3 ~1.17 km) from Farra d'Isonzo Obs. (March 25.95-96p3)
K08E06O 2008 EO6 (arc=20 days, H=19.7 ~389m) from Desert Moon Obs. (March 25.47-49p3)
K08E05Y 2008 EY5 (q=0.234 AU, arc=20 days, H=20.1 ~323m) from ARO (March 24.06p3)
K08E00E 2008 EE (arc=23 days, H=19.6 ~407m) from ARO (March 24.04-05p2)
K08D00W 2008 DW (arc=28 days, H=21.5 ~170m) from ARO (March 24.17-18p3) and Spacewatch 1.8m (March 25.39-40p3)
K08D00C 2008 DC (arc=35 days, H=19.9 ~355m) from ARO (March 24.09-10p3)
K08CB6S 2008 CS116 (Q=4.556 AU, arc=132 days, H=20.8 ~234m) from ARO (March 24.18-19p3)
K08C22A 2008 CA22 (arc=47 days, H=20.6 ~257m) from Spacewatch 1.8m (March 26.16-17p2)
K08C01N 2008 CN1 (arc=51 days, H=20.6 ~257m) from ARO (March 24.06-07p3)
K08C00M 2008 CM (i=36.0°, arc=52 days, H=17.1 ~1.29 km) from Desert Moon Obs. (March 25.11-14p3)
K08B22C 2008 BC22 (arc=73 days, H=19.8 ~371m) from ARO (March 24.20p3)
K08A00E 2008 AE (arc=2 opp, H=19.8 ~371m) from ARO (March 24.25-26p3) and PJMSO (March 25.39-42p5)
K07P08A 2007 PA8 (Q=4.701 AU, arc=4 opp, H=16.1 ~2.04 km, q=0.958 AU) from CSS (March 24.13-14p4)
K07G00G 2007 GG (Q=4.135 AU, arc=3 opp, H=17.5 ~1.07 km) from David Tholen's team on Mauna Kea (Jan. 8.64p1 at R=23.6 & 9.64p1 at R=23.7)
K06B55G 2006 BG55 (arc=3 opp, H=18.3 ~741m) from PJMSO (March 25.31-32p6)
K05T50R 2005 TR50 (arc=2 opp, H=20.2 ~309m) from ARO (March 24.23-24p4)
K05N07B 2005 NB7 (arc=3 opp, H=18.6 ~645m) from Desert Moon Obs. (March 25.16p3)
K05JA8S 2005 JS108 (arc=4 opp, H=19.1 ~513m) from ARO (March 24.26-28p4)
K04RY0H 2004 RH340 (arc=3 opp, H=19.3 ~467m) from Spacewatch 1.8m (March 25.50-51p3)
K04C02R 2004 CR2 (arc=2 opp, H=19.4 ~446m) from the Spacewatch 0.9m telescope (March 25.21-24p3)
K03G00W 2003 GW (i=49.4°, arc=3 opp, H=16.7 ~1.55 km) from PJMSO (March 25.30-31p6)
K03A01D 2003 AD1 (arc=3 opp, H=18.2 ~776m) from ARO (March 24.29-30p3)
K02S00Z 2002 SZ (arc=3 opp, H=20.4 ~282m) from Spacewatch 1.8m (March 26.12-13p3)
G4222 164222 2004 RN9 from Spacewatch 0.9m (March 25.17-19p3)
G2173 162173 1999 JU3 from La Silla/code "|" (March 12.03-04p7)
F2942 152942 2000 FN10 from CSS (March 24.31-33p4)
D8205 138205 2000 EZ148 from Spacewatch 0.9m (March 25.21-24p3)
D6618 136618 1994 CN2 from Spacewatch 0.9m (March 25.21-24p3)
53789 53789 2000 ED104 from Spacewatch 0.9m (March 25.26-29p3)
36183 36183 1999 TX16 from ARO (March 24.28-30p4)
20826 20826 2000 UV13 from CSS (March 24.11p4)
07350 7350 1993 VA from CSS (March 24.13-14p4)
03552 3552 Don Quixote (1983 SA) from CSS (March 24.22-24p4) and Spacewatch 0.9m (March 25.13-15p3)

MPEC 2008-F32 - "03:16 UT" - Comets C/2002 Q8, 2008 E4, 2008 F1 (SOHO)

CK08F010 C/2008 F1 from the LASCO Coronagraph 2 aboard the Solar & Heliospheric Obs. (SOHO) (March 19.94-09p20)
CK08E040 C/2008 E4 from SOHO C2 (March 3.25-44p26)
CK02Q080 C/2002 Q8 (SOHO) from SOHO C2 (2002 Aug. 26.02-28p38)

Observers on 26 March '08

Thirteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 22 in MPEC 2008-F33 -- 2008 EY68, 2008 EY5, 2008 EN82, 2008 EK1, 2008 EJ85, 2008 EE9, 2008 EE, 2008 DW, 2008 DV, 2008 DK5, 2008 DJ5, 2008 DJ, 2008 DC, 2008 CS116, 2008 CN1, 2008 CD22, 2008 BC22, 2008 AE, 2005 TR50, 2005 JS108, 2003 AD1, 36183
`703`	Catalina Sky Survey (CSS) in Arizona, 6 in MPEC 2008-F33 -- 2008 ED69, 2007 PA8, 20826, 152942, 7350, 3552
`448`	Desert Moon Obs. in New Mexico, 5 in MPEC 2008-F33 -- 2008 EO6, 2008 EN82, 2008 EE85, 2008 CM, 2005 NB7
`734`	Farpoint Obs. in Kansas, 1 in MPEC 2008-F33 -- 2008 AF4
`595`	Farra d'Isonzo Obs. in Italy, 3 in MPEC 2008-F33 -- 2008 EY68, 2008 EM9, 2008 EE85
`809\|`	program code "\|" via La Silla in Chile, 3 in MPEC 2008-F33 -- 2008 EQ7, 2008 DJ5, 162173
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-F33 -- 2007 GG
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2008-F33 -- 2008 EM85, 2008 DE, 2008 AE, 2006 BG55, 2003 GW
`H85`	Silver Spring Obs. in Maryland, 2 in MPEC 2008-F33 -- 2008 EE85, 2008 DY
`2492`	LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 3 in MPEC 2008-F32 -- C/2008 F1, C/2008 E4, C/2002 Q8
`691`	Spacewatch 0.9m telescope in Arizona, 6 in MPEC 2008-F33 -- 2004 CR2, 53789, 164222, 138205, 136618, 3552
`291`	Spacewatch 1.8m telescope in Arizona, 11 in MPEC 2008-F33 -- 2008 EZ97, 2008 EX5, 2008 ER7, 2008 EA9, 2008 DW, 2008 DL5, 2008 DK5, 2008 CA22, 2007 XA23, 2004 RH340, 2002 SZ
`A48`	Verona Obs. in Italy, 2 in MPEC 2008-F33 -- 2008 EM85, 2008 EE85

Impact Risk Monitoring on 26 March '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2359 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.
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 EA9	NEODyS	1619	2043-2089	24	3.87e-05	-6.11	-6.62	0	NEODyS: "Based on 35 optical observations (of which 1 are rejected as outliers) from 2008/03/06.406 to 2008/03/25.263."
2008 EA9	JPL Sentry	1418	2068-2105	5	2.1e-05	-6.40	-6.64	0	JPL: "Analysis based on 34 observations spanning 18.856 days (2008-Mar-06.40551 to 2008-Mar-25.26184)." Diameter approximately 0.010 km. from mean, weighted H=27.7.

2008 ER7	NEODyS	1419	2077-2090	3	1.66e-06	-3.35	-3.40	0	NEODyS: "Based on 54 optical observations (of which 0 are rejected as outliers) from 2008/03/06.337 to 2008/03/26.244."
2008 ER7	JPL Sentry	1418	2077-2104	12	2.7e-06	-3.17	-3.41	0	JPL: "Analysis based on 54 observations spanning 19.907 days (2008-Mar-06.33608 to 2008-Mar-26.24323)." Diameter approximately 0.331 km. from mean, weighted H=20.0.

2008 EX5	NEODyS	1419	2044-2089	79	1.86e-05	-4.37	-4.71	0	NEODyS: "Based on 61 optical observations (of which 1 are rejected as outliers) from 2008/03/04.396 to 2008/03/25.384."
2008 EX5	JPL Sentry	1418	2060-2083	27	1.6e-05	-4.42	-4.84	0	JPL: "Analysis based on 60 observations spanning 20.988 days (2008-Mar-04.39523 to 2008-Mar-25.3829)." Diameter approximately 0.057 km. from mean, weighted H=23.9.

2008 AF4	JPL Sentry	1618	2089-2100	7	4.0e-05	-2.08	-2.30	1	JPL: "Analysis based on 591 observations spanning 75.813 days (2008-Jan-10.39652 to 2008-Mar-26.20983)." Diameter approximately 0.390 km. from mean, weighted H=19.7.
2008 AF4	NEODyS	1419	2089	2	2.29e-05	-2.30	-2.30	1	NEODyS: "Based on 595 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/03/26.211. NOTE: The Virtual Impactor in 2089/01/09.478 ... 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 26 March '08

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

1619	Noted that NEODyS has updated its 2008 EA9 risk assessment - see above
1618	Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
1419	Noted that NEODyS has updated its 2008 AF4 risk assessment - see above Noted that NEODyS has updated its 2008 ER7 risk assessment - see above Noted that NEODyS has updated its 2008 EX5 risk assessment - see above
1418	Noted that JPL Sentry has updated its 2008 EA9 risk assessment - see above Noted that JPL Sentry has updated its 2008 ER7 risk assessment - see above Noted that JPL Sentry has updated its 2008 EX5 risk assessment - see above Grabbed MPEC 2008-F33 - Daily Orbit Update - see above The NEOCP has become active
0603	Grabbed MPEC 2008-F32 - Comets C/2002 Q8, 2008 E4, 2008 F1 (SOHO) - see above

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