2008-04-27 Tracking News

Contents on 27 April '08

IAU Minor Planet Center
- NEOCP Activity -- eleven listings: 1 new, 10 updated
- New MPECs -- one MPEC
Observers -- eighteen observing facilities
Impact Risk Monitoring -- three 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

NOTE: The Tracking News and this Web site will be updating less often, and at sometimes irregular intervals, for the rest of April.

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 27 April '08

The MPC's NEO Confirmation Page has 11 listings: 1 new, 10 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and ten updated listings. Of these, five were "one nighters."

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 27 April '08

Minor Planet Electronic Circulars

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

<< DOU on 27 Apr. '08 >> MPEC 2008-H33 - "06:06 UT" - Daily Orbit Update

Observations of risk-listed objects
K08H00J 2008 HJ (small asteroid, arc=3 days, H=25.6 ~26m) from LINEAR (April 25.24-29p5), Jurassien-Vicques Obs. (April 25.89p2), Tiki Obs. (April 26.38-42p3), the Spacewatch 1.8m telescope (April 26.42-43p3), and Alter Satzberg Obs. (April 27.01-02p3)
K08H00H 2008 HH (almost small, arc=2 days, H=22.0 ~135m) from Spacewatch 1.8m (April 26.32-33p3)
Observations of recently (no longer) risk-listed objects
K08H00G 2008 HG (small asteroid, arc=3 days, H=23.7 ~62m) from LINEAR (April 25.30-33p4), Tiki Obs. (April 25.38-44p3), Drebach Obs. (April 26.89-90p5), and Alter Satzberg Obs. (April 27.03-05p4)
K08H00E 2008 HE (q=0.112 AU, Q=4.886 AU, arc=7 days, H=17.9 ~891m) from Astronomical Research Obs. (ARO) (April 24.07-08p3)
K08G00F 2008 GF (arc=25 days, H=20.7 ~245m) from Spacewatch 1.8m (April 26.27p3)
K08F05W 2008 FW5 (almost small, arc=29 days, H=21.8 ~148m) from Spacewatch 1.8m (April 26.33-34p2)
Observations of small asteroids (H>22.0)
K08H00K 2008 HK (arc=2 days, H=22.2 ~123m) from LINEAR (April 25.20-24p5), Jurassien-Vicques Obs. (April 25.85-88p5 & 26.83-84p3), Eschenberg Obs. (April 26.84-85p7), and Alter Satzberg Obs. (April 26.86-88p4)
K08G03U 2008 GU3 (arc=19 days, H=22.4 ~112m) from Spacewatch 1.8m (April 26.43-45p3)
K08G02G 2008 GG2 (arc=20 days, H=22.9 ~89m) from ARO (April 21.25-26p3)
K08G00E 2008 GE (arc=23 days, H=23.4 ~71m) from ARO (April 24.15-17p3)
Observations of other objects
K08GB0B 2008 GB110 (i=36.1°, arc=12 days, H=19.8 ~371m) from Desert Moon Obs. (April 26.31-34p3)
K08G20P 2008 GP20 (arc=16 days, H=19.6 ~407m) from Desert Moon Obs. (April 26.36-40p3)
K08G04A 2008 GA4 (arc=18 days, H=19.3 ~467m) from Spacewatch 1.8m (April 26.28-29p3)
K08G00X 2008 GX (arc=23 days, H=19.4 ~446m) from Desert Moon Obs. (April 26.16-21p3)
K08F06U 2008 FU6 (arc=2 opp, H=17.9 ~891m) from Wildberg Obs. (April 27.09-10p5)
K08F06N 2008 FN6 (arc=28 days, H=21.3 ~186m) from Drebach Obs. (April 26.86-87p3) and Gaisberg Obs. (April 26.91p3)
K08E85M 2008 EM85 (arc=41 days, H=19.7 ~389m) from ARO (April 24.17-18p3)
K08E69C 2008 EC69 (Q=4.457 AU, arc=69 days, H=17.0 ~1.35 km) from Wildberg Obs. (April 27.07-08p5)
K08E09M 2008 EM9 (q=0.291 AU, arc=48 days, H=17.4 ~1.12 km) from Eschenberg Obs. (April 26.85-86p3)
K08E00E 2008 EE (arc=56 days, H=19.6 ~407m) from Spacewatch 1.8m (April 26.14-15p3)
K08D05J 2008 DJ5 (arc=58 days, H=19.9 ~355m) from ARO (April 24.12-14p3) and Spacewatch 1.8m (April 26.17-18p3)
K08D00Y 2008 DY (Q=4.342 AU, arc=60 days, H=20.9 ~224m) from Desert Moon Obs. (April 26.43-45p3)
K08D00E 2008 DE (arc=75 days, H=19.5 ~426m) from Petit Jean Mtn. South Obs. (PJMSO) (April 26.41-43p6) and Eschenberg Obs. (April 26.82p7)
K08CB8Z 2008 CZ118 (arc=74 days, H=18.4 ~708m) from Desert Moon Obs. (April 26.24-29p3)
K08C23P 2008 CP23 (arc=86 days, H=19.6 ~407m) from Alter Satzberg Obs. (April 26.81-90p6)
K07M00R 2007 MR (arc=2 opp, H=21.7 ~155m) from Spacewatch 1.8m (April 26.39p3)
K05T45U 2005 TU45 (arc=3 opp, H=17.0 ~1.35 km) from David Tholen's team on Mauna Kea (April 21.62p2)
K05S25M 2005 SM25 (arc=2 opp, H=19.5 ~426m) from Spacewatch 1.8m (April 26.35-36p2)
K05N07B 2005 NB7 (arc=3 opp, H=18.7 ~616m) from PJMSO (April 26.37-38p6) and Eschenberg Obs. (April 26.80-81p7)
K05L08G 2005 LG8 (q=0.303 AU, arc=4 opp, H=16.9 ~1.41 km) from Desert Moon Obs. (April 26.12-13p3)
K04L00E 2004 LE (i=40.4°, Q=4.860 AU, arc=3 opp, H=16.6 ~1.62 km) from Spacewatch 1.8m (April 26.36-37p3)
K04F32N 2004 FN32 (arc=4 opp, H=19.0 ~537m) from Eschenberg Obs. (April 26.83p7) and Drebach Obs. (April 26.90-91p5)
K03G00W 2003 GW (i=49.4°, arc=3 opp, H=16.7 ~1.55 km) from Drebach Obs. (April 26.85-86p3)
K01H07Y 2001 HY7 (arc=4 opp, H=20.5 ~269m) from Eschenberg Obs. (April 26.94-95p7)
J99F00A 1999 FA (arc=2 opp, H=20.7 ~245m) from Wildberg Obs. (April 27.03-04p5)
I4266 184266 2004 VW14 from PJMSO (April 26.38-39p6) and Capannoli Obs. (April 26.85-86p2)
F4988 154988 2004 XN35 from Capannoli Obs. (April 26.94-95p4)
F2679 152679 1998 KU2 from the Spacewatch 0.9m telescope (April 26.14-18p3)
D7170 137170 1999 HF1 from Iluro Obs. (April 26.12p3)
D6874 136874 1998 FH74 from the Mt. Lemmon Survey (MLS) (April 26.30-31p4)
A2873 102873 1999 WK11 from Iluro Obs. (April 25.99-00p3)
85236 85236 1993 KH from LINEAR (April 25.25-29p5)
68278 68278 2001 FC7 from the Catalina Sky Survey (CSS) (April 26.35-37p4)
53319 53319 1999 JM8 from LINEAR (April 25.34-38p5) and Iluro Obs. (April 26.12-13p3)
35107 35107 1991 VH from Iluro Obs. (April 26.14p3) and PJMSO (April 26.41p5)
11398 11398 1998 YP11 from Iluro Obs. (April 26.13p3)
05604 5604 1992 FE from LINEAR (April 25.14-18p5)
03288 3288 Seleucus (1982 DV) from LINEAR (April 25.14-18p5) and Capannoli Obs. (April 26.87p2)
01864 1864 Daedalus (1971 FA) from Capannoli Obs. (April 26.91p2)
01685 1685 Toro (1948 OA) from Capannoli Obs. (April 26.88-89p2)

Observers on 27 April '08

Eighteen observing facilities appear in today's MPEC.

Code	Observer / observatory
`B03`	Alter Satzberg Obs. in Austria, 4 in MPEC 2008-H33 -- 2008 HK, 2008 HJ, 2008 HG, 2008 CP23
`H55`	Astronomical Research Obs. (ARO) in Illinois, 5 in MPEC 2008-H33 -- 2008 HE, 2008 GG2, 2008 GE, 2008 EM85, 2008 DJ5
`B09`	Capannoli Obs. in Italy, 5 in MPEC 2008-H33 -- 184266, 154988, 3288, 1864, 1685
`703`	Catalina Sky Survey in Arizona, 1 in MPEC 2008-H33 -- 68278
`448`	Desert Moon Obs. in New Mexico, 6 in MPEC 2008-H33 -- 2008 GX, 2008 GP20, 2008 GB110, 2008 DY, 2008 CZ118, 2005 LG8
`113`	Drebach Obs. in Germany, 4 in MPEC 2008-H33 -- 2008 HG, 2008 FN6, 2004 FN32, 2003 GW
`151`	Eschenberg Obs. in Switzerland, 6 in MPEC 2008-H33 -- 2008 HK, 2008 EM9, 2008 DE, 2005 NB7, 2004 FN32, 2001 HY7
`B21`	Gaisberg Obs. in Austria, 1 in MPEC 2008-H33 -- 2008 FN6
`B19`	Iluro Obs. in Spain, 5 in MPEC 2008-H33 -- 53319, 35107, 137170, 11398, 102873
`185`	Jurassien-Vicques Obs. in Switzerland, 2 in MPEC 2008-H33 -- 2008 HK, 2008 HJ
`704`	LINEAR in New Mexico, 7 in MPEC 2008-H33 -- 2008 HK, 2008 HJ, 2008 HG, 85236, 53319, 5604, 3288
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-H33 -- 2005 TU45
`G96`	Mt. Lemmon Survey in Arizona, 1 in MPEC 2008-H33 -- 136874
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 4 in MPEC 2008-H33 -- 2008 DE, 2005 NB7, 35107, 184266
`691`	Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-H33 -- 152679
`291`	Spacewatch 1.8m telescope in Arizona, 11 in MPEC 2008-H33 -- 2008 HJ, 2008 HH, 2008 GU3, 2008 GF, 2008 GA4, 2008 FW5, 2008 EE, 2008 DJ5, 2007 MR, 2005 SM25, 2004 LE
`F85`	Tiki Obs. in Tahiti, 2 in MPEC 2008-H33 -- 2008 HJ, 2008 HG
`198`	Wildberg Obs. in Germany, 3 in MPEC 2008-H33 -- 2008 FU6, 2008 EC69, 1999 FA

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring on 27 April '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 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 HL	NEODyS	1235	2025-2075	8	4.68e-09	-5.58	-6.06	0	NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2008/04/25.462 to 2008/04/26.480."

2008 HJ	NEODyS	1235	2077-2090	3	1.77e-05	-5.28	-5.36	0	NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2008/04/24.248 to 2008/04/27.018."
2008 HJ	JPL Sentry	1234	2077-2106	27	1.2e-04	-4.57	-5.25	0	JPL: "Analysis based on 39 observations spanning 2.7704 days (2008-Apr-24.24725 to 2008-Apr-27.017697)." Diameter approximately 0.027 km. from mean, weighted H=25.5.

2008 HH	JPL Sentry	1234	R E M O V E D						JPL: Risk listing removed at 0947 UTC.
2008 HH	NEODyS	1234	R E M O V E D						-

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 27 April '08

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

1235	Noted that NEODyS has updated its 2008 HJ risk assessment - see above Grabbed MPEC 2008-H33 - Daily Orbit Update - see above
1234	Noted that JPL Sentry has removed 2008 HH as an impact risk - see above Noted that NEODyS has removed 2008 HH as an impact risk - see above Noted that JPL Sentry has updated its 2008 HJ risk assessment - see above Noted that NEODyS has posted 2008 HL as an impact risk - see above

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