Contents on 13 April '08
- IAU Minor Planet Center
- NEOCP Activity -- four listings: 2 new, 2 updated
- New MPECs -- four MPECs
- Observers -- 21 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
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 13 April '08
The MPC's NEO Confirmation Page has 4 listings: 2 new, 2 updated
When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new and two updated listings. All of these 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 13 April '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-G73 time-stamped "03:15 UT" - Comet C/2008 G1 (Gibbs) - see below
- MPEC 2008-G74 time-stamped "06:10 UT" - Daily Orbit Update - see below
- MPEC 2008-G75 time-stamped "15:33 UT" - 2008 FU6 - see below
- MPEC 2008-G76 time-stamped "15:44 UT" - 2007 AE12
MPEC 2008-G76 - "15:44 UT" - 2007 AE12
- K07A12E 2007 AE12 (Earth MOID=2.4 LD, H=19.7 ~389m) from C. Veillet on Mauna Kea (1997 May 7.26-38p7) and the Mt. Lemmon Survey (MLS) (April 13.30-32p4 & 13.38-40p4)
MPEC 2008-G75 - "15:33 UT" - 2008 FU6
- K08F06U 2008 FU6 (H=17.9 ~891m) from NEAT's Mt. Palomar telescope (2003 Jan. 14.43-48p3 & 2003 Feb. 6.37-41p3), the Sloan Digital Sky Survey (SDSS) (2003 March 30.16p2 at V=21.34-22.19), and LINEAR (April 12.35-40p5)
<< DOU on 13 Apr. '08 >> MPEC 2008-G74 - "06:10 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K08G21B 2008 GB21 (small asteroid, arc=1 day, H=25.9 ~22m) from Consell Obs. (April 12.94p5)
- K08G20O 2008 GO20 (small asteroid, arc=4 days, H=22.3 ~117m) from the Spacewatch 1.8m telescope (April 12.29-30p3) and Great Shefford Obs. (April 13.07-09p2)
- K08G02M 2008 GM2 (small asteroid, arc=6 days, H=28.3 ~7m) from Spacewatch 1.8m (April 12.31-32p3)
- K08E07R 2008 ER7 (arc=37 days, H=20.0 ~339m) from Spacewatch 1.8m (April 12.26-27p3)
- Observations of recently (no longer) risk-listed objects
- K08E69D 2008 ED69 (i=36.3°, Q=5.046 AU, arc=32 days, H=16.8 ~1.48 km) from Petit Jean Mtn. South Obs. (PJMSO) (April 12.36-37p7)
- K08E69C 2008 EC69 (Q=4.453 AU, arc=54 days, H=17.0 ~1.35 km) from PJMSO (April 12.33-34p7) and Desert Moon Obs. (April 12.48-49p3)
- Observations of small asteroids (H>22.0)
- K08G20U 2008 GU20 (arc=1 day, H=23.1 ~81m) from Tiki Obs. (April 12.32-38p3)
- K08G20L 2008 GL20 (arc=3 days, H=26.7 ~15m) from Jim Young via Table Mtn. Obs. (April 12.27-28p4)
- K08G04B 2008 GB4 (arc=4 days, H=23.3 ~74m) from Great Shefford Obs. (April 12.93p4)
- K08G03Z 2008 GZ3 (arc=4 days, H=25.3 ~29m) from Young/Table Mtn. (April 12.37-38p4)
- K08G03X 2008 GX3 (arc=5 days, H=26.3 ~19m) from Great Shefford Obs. (April 12.89-92p3)
- K08G03S 2008 GS3 (arc=5 days, H=22.1 ~129m) from the Catalina Sky Survey (CSS) (April 12.28-31p4)
- K08G03P 2008 GP3 (arc=9 days, H=25.4 ~28m) from Faulkes Telescope South (April 12.62p3)
- K08G02K 2008 GK2 (arc=7 days, H=22.9 ~89m) from Great Shefford Obs. (April 12.84-88p4)
- K08G02G 2008 GG2 (arc=7 days, H=23.1 ~81m) from Desert Moon Obs. (April 12.24-27p3)
- K08F06S 2008 FS6 (arc=14 days, H=22.5 ~107m) from Desert Moon Obs. (April 12.29-31p3)
- Observations of almost-small asteroids (21.7<H<=22.0)
- K08G20W 2008 GW20 (arc=2 days, H=21.8 ~148m) from LINEAR (April 11.35-42p10), Tiki Obs. (April 12.41-45p4), and Los Molinos Obs. (April 13.19-20p4)
- Observations of other objects
- K08G03Y 2008 GY3 (arc=5 days, H=20.7 ~245m) from Great Shefford Obs. (April 12.95-97p3)
- K08G03V 2008 GV3 (i=73.1°, arc=6 days, H=18.3 ~741m) from Young/Table Mtn. (April 12.41-42p4), Desert Moon Obs. (April 12.45-46p3), and Great Shefford Obs. (April 13.11p3)
- K08G01E 2008 GE1 (arc=8 days, H=19.3 ~467m) from Spacewatch 1.8m (April 12.48p3)
- K08G00X 2008 GX (arc=10 days, H=19.4 ~446m) from Young/Table Mtn. (April 13.19-21p4)
- K08F06Y 2008 FY6 (arc=13 days, H=20.3 ~295m) from Desert Moon Obs. (April 12.16-20p3)
- K08F06U 2008 FU6 (arc=14 days, H=17.9 ~891m) from PJMSO (April 12.37-38p8) and Desert Moon Obs. (April 12.47p3)
- K08F06N 2008 FN6 (arc=14 days, H=21.4 ~178m) from Wildberg Obs. (April 13.00-01p4)
- K08E85M 2008 EM85 (arc=28 days, H=19.7 ~389m) from LINEAR (April 11.24-28p5)
- K08E32B 2008 EB32 (arc=34 days, H=19.2 ~490m) from Young/Table Mtn. (April 13.17-18p4)
- K08E09M 2008 EM9 (q=0.291 AU, arc=34 days, H=17.5 ~1.07 km) from Consell Obs. (April 12.92-93p6)
- K08D00Y 2008 DY (Q=4.345 AU, arc=46 days, H=20.9 ~224m) from PJMSO (April 12.35p6)
- K08C23P 2008 CP23 (arc=71 days, H=19.5 ~426m) from Desert Moon Obs. (April 12.11-13p3)
- K06U00A 2006 UA (arc=2 opp, H=20.1 ~323m) from CSS (April 12.27-30p4)
- K06B55G 2006 BG55 (arc=3 opp, H=18.4 ~708m) from CSS (April 12.18-20p4)
- K05N07B 2005 NB7 (arc=3 opp, H=18.7 ~616m) from Alter Satzberg Obs. (April 12.83p3)
- K04RY0H 2004 RH340 (arc=3 opp, H=19.4 ~446m) from David Tholen's team on Mauna Kea (Jan. 8.61-62p3 at R=22.2-3 & 9.59p2 at R=22.1)
- K03G00W 2003 GW (i=49.4°, arc=3 opp, H=16.7 ~1.55 km) from CSS (April 12.15-16p4) and Wildberg Obs. (April 12.82-83p6)
- K02F05W 2002 FW5 (i=46.4°, arc=3 opp, H=19.3 ~467m) from LINEAR (April 11.26-31p5)
- H0891 170891 2004 TY16 from CSS (April 12.12-14p4)
- F2942 152942 2000 FN10 from LINEAR (April 11.13-18p5)
- F2679 152679 1998 KU2 from LINEAR (April 11.26-31p5)
- D7170 137170 1999 HF1 from PJMSO (April 12.39p5)
- D7158 137158 1999 FB from LINEAR (April 11.24-27p4)
- A2873 102873 1999 WK11 from LINEAR (April 11.30-34p4)
- 85628 85628 1998 KV2 from LINEAR (April 11.39-42p4)
- 53789 53789 2000 ED104 from LINEAR (April 11.24-29p5) and CSS (April 12.28-31p4)
- 35107 35107 1991 VH from PJMSO (April 12.32-33p5)
- 27346 27346 2000 DN8 from CSS (April 12.43-46p4)
- 11054 11054 1991 FA from the Spacewatch 0.9m telescope (April 12.33-35p3)
- 04544 4544 Xanthus (1989 FB) from LINEAR (April 11.13-17p4)
- 01866 1866 Sisyphus (1972 XA) from Casasco Obs. (April 1.85-89p2, 2.85p1 & 2.89p1)
MPEC 2008-G73 - "03:15 UT" - Comet C/2008 G1 (Gibbs)
- CK08G010 C/2008 G1 (i=72.8°, q=3.944 AU, TP=2009 Jan. 17.319 TT) from Kambah Obs. (April 10.58-59p2), Table Mtn. Obs. (April 12.42-44p4), and Nazaret Obs. (April 12.00p3)
Observers on 13 April '08
A total of 21 observing facilities appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| B03 | Alter Satzberg Obs. in Austria, 1 in MPEC 2008-G74 -- 2005 NB7 |
| B66 | Casasco Obs., 1 in MPEC 2008-G74 -- 1866 |
| 703 | Catalina Sky Survey (CSS) in Arizona, 7 in MPEC 2008-G74 -- 2008 GS3, 2006 UA, 2006 BG55, 2003 GW, 53789, 27346, 170891 |
| 176 | Consell Obs. in Spain, 2 in MPEC 2008-G74 -- 2008 GB21, 2008 EM9 |
| 448 | Desert Moon Obs. in New Mexico, 7 in MPEC 2008-G74 -- 2008 GV3, 2008 GG2, 2008 FY6, 2008 FU6, 2008 FS6, 2008 EC69, 2008 CP23 |
| E10 | Faulkes Telescope South in New South Wales, 1 in MPEC 2008-G74 -- 2008 GP3 |
| J95 | Great Shefford Obs. in England, 6 in MPEC 2008-G74 -- 2008 GY3, 2008 GX3, 2008 GV3, 2008 GO20, 2008 GK2, 2008 GB4 |
| 415 | Kambah Obs. in the Australian Capital Territory, 1 in MPEC 2008-G73 -- C/2008 G1 |
| 704 | LINEAR in New Mexico, 11 in MPECs 2008-G74 & 2008-G75 -- 2008 GW20, 2008 FU6, 2008 EM85, 2002 FW5, 85628, 53789, 152942, 152679, 137158, 102873, 4544 |
| 844 | Los Molinos Obs. in Uruguay, 1 in MPEC 2008-G74 -- 2008 GW20 |
| 5682 | David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-G74 -- 2004 RH340 |
| 5683 | C. Veillet on Mauna Kea in Hawaii, 1 in MPEC 2008-G76 -- 2007 AE12 |
| G96 | Mt. Lemmon Survey in Arizona, 1 in MPEC 2008-G76 -- 2007 AE12 |
| 644 | NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2008-G75 -- 2008 FU6 |
| J47 | Nazaret Obs. in Spain, 1 in MPEC 2008-G73 -- C/2008 G1 |
| H45 | Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2008-G74 -- 2008 FU6, 2008 ED69, 2008 EC69, 2008 DY, 35107, 137170 |
| 645 | Sloan Digital Sky Survey in New Mexico, 1 in MPEC 2008-G75 -- 2008 FU6 |
| 691 | Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-G74 -- 11054 |
| 291 | Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2008-G74 -- 2008 GO20, 2008 GM2, 2008 GE1, 2008 ER7 |
| 673 | Table Mtn. Obs. in southern California, 1 in MPEC 2008-G73 -- C/2008 G1 |
| 6735 | Jim Young via Table Mtn. Obs. in southern California, 5 in MPEC 2008-G74 -- 2008 GZ3, 2008 GX, 2008 GV3, 2008 GL20, 2008 EB32 |
| F85 | Tiki Obs. in Tahiti, 2 in MPEC 2008-G74 -- 2008 GW20, 2008 GU20 |
| 198 | Wildberg Obs. in Germany, 2 in MPEC 2008-G74 -- 2008 FN6, 2003 GW |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 13 April '08
| 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 GO20 | NEODyS | 1600 | R E M O V E D | - | |||||
| 2008 GM2 | NEODyS | 1601 | 2063-2085 | 10 | 9.29e-07 | -7.97 | -8.26 | 0 | NEODyS: "Based on 46 optical observations (of which 0 are rejected as outliers) from 2008/04/06.414 to 2008/04/12.324." |
| 2008 ER7 | NEODyS | 1601 | 2071-2089 | 5 | 4.65e-07 | -3.91 | -3.99 | 0 | NEODyS: "Based on 85 optical observations (of which 0 are rejected as outliers) from 2008/03/06.337 to 2008/04/12.270." |
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 13 April '08
Times are UTC for when items were noted or added by The Tracking News.
| 1601 | Noted that NEODyS has updated its 2008 ER7 risk assessment - see above Noted that NEODyS has updated its 2008 GM2 risk assessment - see above |
| 1600 | Noted that NEODyS has removed 2008 GO20 as an impact risk - see above Grabbed MPEC 2008-G74 - Daily Orbit Update - see above Grabbed MPEC 2008-G75 - 2008 FU6 - see above Grabbed MPEC 2008-G76 - 2007 AE12 - see above The NEOCP has become active |
| 0417 | Grabbed MPEC 2008-G73 - Comet C/2008 G1 (Gibbs) - see above |
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