Contents on 13 August '08
- IAU Minor Planet Center
- NEOCP Activity -- two listings: 2 new
- New MPECs -- one MPEC
- Observers -- sixteen 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 13 August '08
The MPC's NEO Confirmation Page has 2 listings: 2 new
When last checked at 2357 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new listings. Both of these were "one nighters."
New MPECs on 13 August '08
Minor Planet Electronic Circulars
As of last check at 2357 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
<< DOU on 13 Aug. '08 >> MPEC 2008-P61 - "06:10 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K08P09R 2008 PR9 (small asteroid, arc=4 days, H=22.4 ~112m) from the Siding Spring Survey (SSS) (Aug. 12.57p2)
- K08P09J 2008 PJ9 (almost small, Q=4.213 AU, arc=6 days, H=21.8 ~148m) from Astronomical Research Obs. (ARO) (Aug. 11.27-28p4) and SSS (Aug. 12.64p2)
- K08O13N 2008 ON13 (Q=4.108 AU, arc=13 days, H=19.9 ~355m) from ARO (Aug. 11.24-26p4) and Great Shefford Obs. (Aug. 12.97-00p2)
- K08O00O 2008 OO (arc=18 days, H=19.8 ~371m) from La Sagra Obs. (July 27.09-12p3) and Great Shefford Obs. (Aug. 12.94-95p2)
- Observations of recently (no longer) risk-listed objects
- K08P04W 2008 PW4 (small asteroid, arc=7 days, H=22.4 ~112m) from ARO (Aug. 11.26p5) and SSS (Aug. 12.65p2)
- K08P03K 2008 PK3 (almost small, arc=9 days, H=22.0 ~135m) from SSS (Aug. 12.58-63p5)
- K08P03H 2008 PH3 (arc=9 days, H=21.7 ~155m) from SSS (Aug. 12.66-67p2)
- K08P01F 2008 PF1 (small asteroid, arc=10 days, H=22.3 ~117m) from Great Shefford Obs. (Aug. 13.13-14p3)
- Observations of small asteroids (H>22.0)
- K08P02G 2008 PG2 (arc=9 days, H=22.8 ~93m) from SSS (Aug. 12.55p2)
- K08O10N 2008 ON10 (arc=12 days, H=24.7 ~39m) from Hibiscus Obs. (Aug. 12.61-63p3)
- K08O09C 2008 OC9 (arc=11 days, H=23.3 ~74m) from ARO (Aug. 11.21-23p5)
- K08O08N 2008 ON8 (arc=12 days, H=25.3 ~29m) from ARO (Aug. 11.31-32p3)
- K08N00X 2008 NX (arc=40 days, H=25.1 ~32m) from ARO (Aug. 11.28-30p3)
- Observations of other objects
- K08P16V 2008 PV16 (arc=1 day, H=20.8 ~234m) from Great Shefford Obs. (Aug. 12.92-93p3)
- K08P03L 2008 PL3 (arc=8 days, H=19.4 ~446m) from SSS (Aug. 12.57-58p5)
- K08P03J 2008 PJ3 (arc=9 days, H=20.5 ~269m) from Tiki Obs. (Aug. 12.62-63p2) and SSS (Aug. 12.66p2)
- K08O09S 2008 OS9 (arc=16 days, H=19.2 ~490m) from La Sagra Obs. (Aug. 1.10-12p3) and El Leoncito Obs. (Aug. 9.24-25p3 & 10.23-25p5)
- K08O08X 2008 OX8 (arc=13 days, H=21.6 ~162m) from SSS (Aug. 12.56p2)
- K08N00B 2008 NB (arc=41 days, H=19.1 ~513m) from ARO (Aug. 11.33-34p3)
- K08M01H 2008 MH1 (Q=4.263 AU, arc=44 days, H=18.4 ~708m) from ARO (Aug. 11.12-13p3)
- K08J35T 2008 JT35 (Q=4.082 AU, arc=98 days, H=21.3 ~186m) from ARO (Aug. 11.22-23p3)
- K08J26R 2008 JR26 (arc=90 days, H=19.9 ~355m) from ARO (Aug. 11.08-10p4)
- K08H03O 2008 HO3 (Q=4.799 AU, arc=104 days, H=18.0 ~851m) from ARO (Aug. 11.09-10p3)
- K08B18T 2008 BT18 (arc=4 opp, H=18.3 ~741m) from El Leoncito Obs. (Aug. 9.28-29p3)
- K07VD7W 2007 VW137 (arc=2 opp, H=18.1 ~812m) from La Sagra Obs. (July 31.07-10p3)
- K07Q14X 2007 QX14 (arc=2 opp, H=18.0 ~851m) from NEAT's GEODSS Haleakala telescope (1996 May 14.27-30p3), SSS (2007 June 15.71-74p4), XuYi Sta. (2007 Aug. 24.69-72p4 discovery), the Catalina Sky Survey (CSS) (2007 Sept. 3.28-30p4 & 2007 Sept. 12.23-25p3), the Spacewatch 0.9m telescope (2007 Sept. 12.28-33p3), LONEOS (2007 Sept. 18.26-33p4), and the Mt. Lemmon Survey (MLS) (2007 Oct. 8.22-24p4)
- K04S56B 2004 SB56 (arc=2 opp, H=19.3 ~467m) from Thompsonville Obs. (Aug. 13.12-13p6)
- K04N08L 2004 NL8 (Q=4.419 AU, arc=3 opp, H=17.2 ~1.23 km) from La Sagra Obs. (July 28.92-95p3)
- K01T45A 2001 TA45 (arc=4 opp, H=19.2 ~490m) from Santa Mama Obs. (Aug. 11.89-90p5)
- J96B03Z 1996 BZ3 (Q=4.028 AU, arc=4 opp, H=18.2 ~776m) from Spacewatch 0.9m (Aug. 7.44p1)
- I8452 188452 2004 HE62 from El Leoncito Obs. (Aug. 9.09-10p4), Santa Mama Obs. (Aug. 11.80-82p9), and Thompsonville Obs. (Aug. 13.09p6)
- H3689 173689 2001 PK9 from Spacewatch 0.9m (July 31.16p1)
- G2510 162510 2000 QW69 from SSS (Aug. 12.70-74p4)
- A1873 101873 1999 NC5 from SSS (Aug. 12.77-80p4)
- 90403 90403 2003 YE45 from Santa Mama Obs. (Aug. 11.83-85p9), Ametlla del Valles Obs. (Aug. 11.93-95p4), and Thompsonville Obs. (Aug. 13.13-14p6)
- 85839 85839 1998 YO4 from El Leoncito Obs. (Aug. 10.05-07p3 & 12.07-08p3)
- 65690 65690 1991 DG from Santa Mama Obs. (Aug. 11.86-88p9)
- 55408 55408 2001 TC2 from Spacewatch 0.9m (Aug. 7.44p1 & 11.43p1)
- 39572 39572 1993 DQ1 from Thompsonville Obs. (Aug. 13.10p6)
- 17182 17182 1999 VU from El Leoncito Obs. (Aug. 9.06-08p3)
- 11398 11398 1998 YP11 from El Leoncito Obs. (Aug. 10.08-09p3 & 12.09-10p3)
- 07482 7482 1994 PC1 from El Leoncito Obs. (Aug. 12.14-15p3)
- 04179 4179 Toutatis (1989 AC) from La Sagra Obs. (July 12.06-13p3) and El Leoncito Obs. (Aug. 9.22-23p3 & 10.16-17p3)
- 01866 1866 Sisyphus (1972 XA) from La Sagra Obs. (July 22.87-90p3)
- 01620 1620 Geographos (1951 RA) from La Sagra Obs. (July 21.13-15p3)
Observers on 13 August '08
Sixteen observing facilities appear in today's MPEC.
| Code | Observer / observatory |
|---|---|
| B37 | Ametlla del Valles Obs. in Spain, 1 in MPEC 2008-P61 -- 90403 |
| H55 | Astronomical Research Obs. (ARO) in Illinois, 11 in MPEC 2008-P61 -- 2008 PW4, 2008 PJ9, 2008 ON8, 2008 ON13, 2008 OC9, 2008 NX, 2008 NB, 2008 MH1, 2008 JT35, 2008 JR26, 2008 HO3 |
| 703 | Catalina Sky Survey in Arizona, 1 in MPEC 2008-P61 -- 2007 QX14 |
| 808 | El Leoncito Obs. in Argentina, 8 in MPEC 2008-P61 -- 2008 OS9, 2008 BT18, 85839, 188452, 17182, 11398, 7482, 4179 |
| J95 | Great Shefford Obs. in England, 4 in MPEC 2008-P61 -- 2008 PV16, 2008 PF1, 2008 OO, 2008 ON13 |
| F84 | Hibiscus Obs. in Tahiti, 1 in MPEC 2008-P61 -- 2008 ON10 |
| 699 | LONEOS in Arizona, 1 in MPEC 2008-P61 -- 2007 QX14 |
| J75 | La Sagra Obs. in Spain, 7 in MPEC 2008-P61 -- 2008 OS9, 2008 OO, 2007 VW137, 2004 NL8, 4179, 1866, 1620 |
| G96 | Mt. Lemmon Survey in Arizona, 1 in MPEC 2008-P61 -- 2007 QX14 |
| 566 | NEAT's GEODSS Haleakala telescope in Hawaii, 1 in MPEC 2008-P61 -- 2007 QX14 |
| D29 | Purple Mtn. Obs. XuYi Station (XuYi Sta.) in China, 1 in MPEC 2008-P61 -- 2007 QX14 |
| B38 | Santa Mama Obs. in Italy, 4 in MPEC 2008-P61 -- 2001 TA45, 90403, 65690, 188452 |
| E12 | Siding Spring Survey (SSS) in New South Wales, 12 in MPEC 2008-P61 -- 2008 PW4, 2008 PR9, 2008 PL3, 2008 PK3, 2008 PJ9, 2008 PJ3, 2008 PH3, 2008 PG2, 2008 OX8, 2007 QX14, 162510, 101873 |
| 691 | Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2008-P61 -- 2007 QX14, 1996 BZ3, 55408, 173689 |
| H53 | Thompsonville Obs. in Illinois, 4 in MPEC 2008-P61 -- 2004 SB56, 90403, 39572, 188452 |
| F85 | Tiki Obs. in Tahiti, 1 in MPEC 2008-P61 -- 2008 PJ3 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 13 August '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 PR9 | JPL Sentry | 1449 | R E M O V E D | JPL: Risk listing removed at 0903 UTC. | |||||
| NEODyS | 1449 | R E M O V E D | - | ||||||
| 2008 PJ9 | JPL Sentry | 1449 | 2071 | 1 | 1.0e-08 | -6.52 | -6.52 | 0 | JPL: "Analysis based on 27 observations spanning 6.0495 days (2008-Aug-06.59348 to 2008-Aug-12.64301)." Diameter approximately 0.150 km. from mean, weighted H=21.8. |
| NEODyS | 1449 | 2071 | 1 | 1.29e-08 | -6.39 | -6.39 | 0 | NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2008/08/06.594 to 2008/08/12.644." | |
| 2008 ON13 | JPL Sentry | 1449 | 2086 | 1 | 3.0e-09 | -5.75 | -5.75 | 0 | JPL: "Analysis based on 21 observations spanning 12.609 days (2008-Jul-31.39367 to 2008-Aug-13.00223)." Diameter approximately 0.380 km. from mean, weighted H=19.8. |
| NEODyS | 1449 | 2086 | 1 | 5.15e-09 | -5.52 | -5.52 | 0 | NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2008/07/31.394 to 2008/08/13.003." | |
| 2008 OO | JPL Sentry | 1449 | 2100 | 1 | 6.6e-07 | -3.66 | -3.66 | 0 | JPL: "Analysis based on 85 observations spanning 17.857 days (2008-Jul-26.09211 to 2008-Aug-12.94893)." Diameter approximately 0.380 km. from mean, weighted H=19.7. |
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 August '08
Times are UTC for when items were noted or added by The Tracking News.
| 1449 | Noted that JPL Sentry has updated its 2008 ON13 risk assessment - see above Noted that NEODyS has updated its 2008 ON13 risk assessment - see above Noted that JPL Sentry has updated its 2008 OO risk assessment - see above Noted that JPL Sentry has updated its 2008 PJ9 risk assessment - see above Noted that NEODyS has updated its 2008 PJ9 risk assessment - see above Noted that JPL Sentry has removed 2008 PR9 as an impact risk - see above Noted that NEODyS has removed 2008 PR9 as an impact risk - see above Grabbed MPEC 2008-P61 - Daily Orbit Update - see above |
| 0119 | The NEOCP has become active |
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