Contents on 4 April '08
- IAU Minor Planet Center
- NEOCP Activity -- nine listings: 3 new, 6 updated
- New MPECs -- five MPECs
- Observers -- nineteen observing facilities
- Impact Risk Monitoring -- seven 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 4 April '08
The MPC's NEO Confirmation Page has 9 listings: 3 new, 6 updated
When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and six updated listings. Of these, six were "one nighters." So far The Tracking News has counted a total of fourteen 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 4 April '08
Minor Planet Electronic Circulars
As of last check at 2357 UTC, there have been five MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2008-G20 time-stamped "06:08 UT" - Daily Orbit Update - see below
- MPEC 2008-G21 time-stamped "15:41 UT" - 2008 GQ - see below
- MPEC 2008-G22 time-stamped "15:45 UT" - 2008 GR - see below
- MPEC 2008-G23 time-stamped "22:10 UT" - 2008 GV - see below
- MPEC 2008-G24 time-stamped "22:57 UT" - 2008 GX
MPEC 2008-G24 - "22:57 UT" - 2008 GX
- K08G00X 2008 GX (H=19.3 ~467m) was discovered at 0325 UT on 3 April by LINEAR, which observed it at April 3.14-18p4 and 4.24-29p4. The discovery was confirmed by McDonald Obs. (April 4.16-19p3), the Mt. Lemmon Survey (MLS) (April 4.25-27p4), CAST Obs. (April 4.88-89p2), and Consell Obs. (April 4.89-93p4).
MPEC 2008-G23 - "22:10 UT" - 2008 GV
- K08G00V 2008 GV (small asteroid, Q=4.241 AU, H=23.2 ~78m) was discovered at 0540 UT on 3 April by LINEAR, which observed it at April 3.24-28p5 and 4.24-28p4. The discovery was confirmed by Farra d'Isonzo Obs. (April 4.89p3).
MPEC 2008-G22 - "15:45 UT" - 2008 GR
- K08G00R 2008 GR (small asteroid, Earth MOID=6.5 LD, H=25.6 ~26m) was discovered at 0832 UT on 3 April by MLS, which observed it at April 3.36-41p8 and 4.33-35p4.
MPEC 2008-G21 - "15:41 UT" - 2008 GQ
- K08G00Q 2008 GQ (small asteroid, H=24.9 ~35m) was discovered at 0551 UT on 3 April by MLS, which observed it at April 3.24-26p4, 3.31-33p8, 3.38p4, and 4.32-34p4. The discovery was confirmed by Dave Balam via Plaskett 1.8m Telescope (April 3.33p3), the Spacewatch 1.8m telescope (April 3.34-35p3), and Great Shefford Obs. (April 3.94-97p3).
<< DOU on 4 Apr. '08 >> MPEC 2008-G20 - "06:08 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K08G00K 2008 GK (small asteroid, arc=1 day, H=23.5 ~68m) from Spacewatch 1.8m (April 4.19-20p3)
- K08G00J 2008 GJ (arc=2 days, H=20.4 ~282m) from Spacewatch 1.8m (April 3.22-23p3)
- K08F07K 2008 FK7 (small asteroid, arc=3 days, H=23.1 ~81m) from Spacewatch 1.8m (April 3.37p2)
- K08F06T 2008 FT6 (arc=5 days, H=17.6 ~1.02 km) from Spacewatch 1.8m (April 3.39p3)
- K08F05F 2008 FF5 (small asteroid, q=0.079 AU, Q=4.494 AU, arc=7 days, H=23.1 ~81m) from Spacewatch 1.8m (April 4.21-22p3)
- K08F00N 2008 FN (i=44.9°, arc=7 days, H=18.5 ~676m) from Spacewatch 1.8m (April 3.40-41p3)
- K08E07R 2008 ER7 (arc=29 days, H=20.0 ~339m) from Great Shefford Obs. (April 3.88-91p2) and Spacewatch 1.8m (April 4.17p3)
- K08A04F 2008 AF4 (arc=84 days, H=19.7 ~389m) from Astronomical Research Obs. (ARO) (April 3.09-10p3)
- Observations of recently (no longer) risk-listed objects
- K08F07L 2008 FL7 (small asteroid, arc=3 days, H=24.3 ~47m) from Spacewatch 1.8m (April 3.31-33p6)
- K08F06W 2008 FW6 (arc=4 days, H=20.8 ~234m) from the Catalina Sky Survey (CSS) (April 3.19-20p4)
- K08E05E 2008 EE5 (i=44.8°, arc=31 days, H=19.1 ~513m) from Spacewatch 1.8m (April 4.12p2)
- Observations of small asteroids (H>22.0)
- K08F06X 2008 FX6 (arc=5 days, H=25.0 ~34m) from Great Shefford Obs. (April 3.83-85p3)
- K08F00O 2008 FO (arc=7 days, H=23.2 ~78m) from Schiaparelli Obs. (March 28.87-88p3) and Madonna di Dossobuono Obs. (April 2.83-84p3)
- K08E85E 2008 EE85 (arc=21 days, H=22.7 ~98m) from CSS (April 3.12-14p4)
- K03F06Y 2003 FY6 (q=0.305 AU, arc=2 opp, H=22.4 ~112m) from CSS (March 30.23p1)
- J98K03G 1998 KG3 (arc=3 opp, H=22.3 ~117m) from Desert Moon Obs. (April 3.33-36p3)
- Observations of almost-small asteroids (21.7<H<=22.0)
- K08F05G 2008 FG5 (arc=6 days, H=22.0 ~135m) from Tiki Obs. (April 2.49-52p3), Desert Moon Obs. (April 3.31-32p4), and Spacewatch 1.8m (April 3.42-43p3)
- Observations of other objects
- K08G00D 2008 GD (q=0.266 AU, arc=2 days, H=19.8 ~371m) from Silver Spring Obs. (April 3.04-08p3)
- K08F06Y 2008 FY6 (arc=4 days, H=20.2 ~309m) from Tiki Obs. (April 2.36-41p3) and Desert Moon Obs. (April 3.26-29p3)
- K08F06U 2008 FU6 (arc=5 days, H=17.9 ~891m) from Desert Moon Obs. (April 3.38-39p5)
- K08E85M 2008 EM85 (arc=19 days, H=19.7 ~389m) from Schiaparelli Obs. (March 29.09-10p2)
- K08E32A 2008 EA32 (IEO, Q=0.804 AU, arc=22 days, H=16.3 ~1.86 km) from Schiaparelli Obs. (March 28.85-86p2)
- K08E06O 2008 EO6 (arc=29 days, H=19.6 ~407m) from LINEAR (April 3.24-28p4)
- K08E01J 2008 EJ1 (i=38.8°, arc=31 days, H=15.8 ~2.34 km, q=0.981 AU) from Tiki Obs. (April 2.29-34p3)
- K08E00S 2008 ES (Q=4.037 AU, arc=2 opp, H=18.2 ~776m) from Madonna di Dossobuono Obs. (April 2.87-88p3)
- K08D05J 2008 DJ5 (arc=35 days, H=19.9 ~355m) from the Spacewatch 0.9m telescope (April 3.14-17p3)
- K08D00Y 2008 DY (Q=4.349 AU, arc=37 days, H=20.8 ~234m) from Desert Moon Obs. (April 3.46-48p3)
- K08D00D 2008 DD (arc=44 days, H=20.4 ~282m) from Tiki Obs. (April 2.60-64p3)
- K08CB9C 2008 CC119 (arc=50 days, H=18.6 ~645m) from Tiki Obs. (April 2.43-48p3)
- K06U00A 2006 UA (arc=2 opp, H=20.1 ~323m) from CSS (March 29.26-28p4) and LINEAR (April 3.19-23p5)
- K04RA9Y 2004 RY109 (arc=3 opp, H=19.0 ~537m) from Spacewatch 0.9m (April 2.13p1)
- K04F32N 2004 FN32 (arc=4 opp, H=19.0 ~537m) from MLS (April 3.40-42p4)
- K04C02R 2004 CR2 (arc=2 opp, H=19.4 ~446m) from Spacewatch 0.9m (April 3.14-21p6)
- K03H22A 2003 HA22 (arc=3 opp, H=19.4 ~446m) from Spacewatch 0.9m (April 1.15-17p2 & 3.13-17p3)
- K03E50D 2003 ED50 (arc=3 opp, H=20.8 ~234m) from Spacewatch 1.8m (April 4.14-15p3)
- K01H07Y 2001 HY7 (arc=4 opp, H=20.5 ~269m) from Desert Moon Obs. (April 3.40-43p3)
- K01D08Q 2001 DQ8 (q=0.182 AU, arc=3 opp, H=18.0 ~851m) from Tiki Obs. (April 2.54-59p3)
- K00DA7P 2000 DP107 (arc=6 opp, H=18.2 ~776m) from MLS (April 3.17-18p4)
- H0891 170891 2004 TY16 from Saint-Barthelemy Obs. (April 3.96-99p4)
- G2422 162422 2000 EV70 from Spacewatch 0.9m (April 3.24-28p3)
- F4988 154988 2004 XN35 from CSS (April 3.27-30p3)
- F4229 154229 2002 JN97 from Spacewatch 0.9m (April 3.48p1)
- E4861 144861 2004 LA12 from CSS (April 3.28-31p4)
- E1531 141531 2002 GB from CSS (April 3.28-30p4)
- E1432 141432 2002 CQ11 from LINEAR (April 3.18-23p5)
- D8127 138127 2000 EE14 from LINEAR (April 3.13-17p5)
- D7158 137158 1999 FB from CSS (March 29.26-28p4)
- A2873 102873 1999 WK11 from MLS (April 3.39-41p4)
- 86667 86667 2000 FO10 from CSS (March 31.37p1)
- 85236 85236 1993 KH from LINEAR (April 3.24-29p5)
- 68278 68278 2001 FC7 from Spacewatch 0.9m (April 3.46-50p3)
- 54686 54686 2001 DU8 from CSS (April 3.13-15p4)
- 27346 27346 2000 DN8 from CSS (April 3.47-48p4)
- 24445 24445 2000 PM8 from CSS (March 29.42-44p4)
- 11054 11054 1991 FA from Spacewatch 0.9m (March 31.40-42p2)
- 06456 6456 Golombek (1992 OM) from CSS (March 29.34-36p3)
- 06037 6037 1988 EG from CSS (April 3.12-15p4)
- 05646 5646 1990 TR from MLS (April 3.22-23p4)
- 05626 5626 1991 FE from Spacewatch 0.9m (April 3.41-44p3)
- 03552 3552 Don Quixote (1983 SA) from LINEAR (April 3.13-18p10)
- 01866 1866 Sisyphus (1972 XA) from CSS (April 3.23-25p4)
- 01864 1864 Daedalus (1971 FA) from LINEAR (April 3.18-23p5) and Sant Cugat del Valles Obs. (April 3.92-93p3)
Observers on 4 April '08
Nineteen observing facilities appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| H55 | Astronomical Research Obs. in Illinois, 1 in MPEC 2008-G20 -- 2008 AF4 |
| 235 | CAST Obs. in Italy, 1 in MPEC 2008-G24 -- 2008 GX |
| 703 | Catalina Sky Survey (CSS) in Arizona, 15 in MPEC 2008-G20 -- 2008 FW6, 2008 EE85, 2006 UA, 2003 FY6, 86667, 54686, 27346, 24445, 154988, 144861, 141531, 137158, 6456, 6037, 1866 |
| 176 | Consell Obs. in Spain, 1 in MPEC 2008-G24 -- 2008 GX |
| 448 | Desert Moon Obs. in New Mexico, 6 in MPEC 2008-G20 -- 2008 FY6, 2008 FU6, 2008 FG5, 2008 DY, 2001 HY7, 1998 KG3 |
| 595 | Farra d'Isonzo Obs. in Italy, 1 in MPEC 2008-G23 -- 2008 GV |
| J95 | Great Shefford Obs. in England, 3 in MPECs 2008-G20 & 2008-G21 -- 2008 GQ, 2008 FX6, 2008 ER7 |
| 704 | LINEAR in New Mexico, 9 in MPECs 2008-G20, 2008-G23 & 2008-G24 -- 2008 GX, 2008 GV, 2008 EO6, 2006 UA, 85236, 141432, 138127, 3552, 1864 |
| 560 | Madonna di Dossobuono Obs. in Italy, 2 in MPEC 2008-G20 -- 2008 FO, 2008 ES |
| 711 | McDonald Obs. in Texas, 1 in MPEC 2008-G24 -- 2008 GX |
| G96 | Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2008-G20, 2008-G21, 2008-G22 & 2008-G24 -- 2008 GX, 2008 GR, 2008 GQ, 2004 FN32, 2000 DP107, 102873, 5646 |
| 6581 | Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2008-G21 -- 2008 GQ |
| B04 | Saint-Barthelemy Obs. in Italy, 1 in MPEC 2008-G20 -- 170891 |
| B61 | Sant Cugat del Valles Obs. in Spain, 1 in MPEC 2008-G20 -- 1864 |
| 204 | Schiaparelli Obs. in Italy, 3 in MPEC 2008-G20 -- 2008 FO, 2008 EM85, 2008 EA32 |
| H85 | Silver Spring Obs. in Maryland, 1 in MPEC 2008-G20 -- 2008 GD |
| 691 | Spacewatch 0.9m telescope in Arizona, 9 in MPEC 2008-G20 -- 2008 DJ5, 2004 RY109, 2004 CR2, 2003 HA22, 68278, 162422, 154229, 11054, 5626 |
| 291 | Spacewatch 1.8m telescope in Arizona, 12 in MPECs 2008-G20 & 2008-G21 -- 2008 GQ, 2008 GK, 2008 GJ, 2008 FT6, 2008 FN, 2008 FL7, 2008 FK7, 2008 FG5, 2008 FF5, 2008 ER7, 2008 EE5, 2003 ED50 |
| F85 | Tiki Obs. in Tahiti, 6 in MPEC 2008-G20 -- 2008 FY6, 2008 FG5, 2008 EJ1, 2008 DD, 2008 CC119, 2001 DQ8 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 4 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 GJ | NEODyS | 1429 | 2033-2073 | 7 | 3.53e-08 | -4.97 | -5.52 | 0 | NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2008/04/01.299 to 2008/04/03.228." |
| 2008 FK7 | NEODyS | 1427 | R E M O V E D | ||||||
| 2008 FT6 | NEODyS | 1427 | R E M O V E D | ||||||
| 2008 FF5 | NEODyS | 1428 | 2060-2070 | 2 | 2.45e-07 | -5.11 | -5.23 | 0 | NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2008/03/28.323 to 2008/04/04.216." |
| 2008 FN | NEODyS | 1427 | R E M O V E D | ||||||
| 2008 ER7 | NEODyS | 1428 | 2071-2089 | 4 | 3.49e-07 | -4.04 | -4.07 | 0 | NEODyS: "Based on 79 optical observations (of which 0 are rejected as outliers) from 2008/03/06.337 to 2008/04/04.173." |
| 2008 AF4 | NEODyS | 1428 | 2089 | 2 | 7.7e-06 | -2.77 | -2.77 | 0 | NEODyS: "Based on 598 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/04/03.104." |
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 4 April '08
Times are UTC for when items were noted or added by The Tracking News.
| 2324 | Grabbed MPEC 2008-G23 - 2008 GV - see above Grabbed MPEC 2008-G24 - 2008 GX - see above |
| 1559 | Grabbed MPEC 2008-G21 - 2008 GQ - see above Grabbed MPEC 2008-G22 - 2008 GR - see above |
| 1429 | Noted that NEODyS has updated its 2008 GJ risk assessment - see above Grabbed MPEC 2008-G20 - Daily Orbit Update - see above |
| 1428 | 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 FF5 risk assessment - see above |
| 1427 | Noted that NEODyS has removed 2008 FK7 as an impact risk - see above Noted that NEODyS has removed 2008 FN as an impact risk - see above Noted that NEODyS has removed 2008 FT6 as an impact risk - see above |
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