Contents on 4 January '09
- IAU Minor Planet Center
- NEOCP Activity -- two listings: 1 new, 1 updated
- New MPECs -- one MPEC
- Observers -- sixteen observing facilities
- Impact Risk Monitoring -- six 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 January '09
The MPC's NEO Confirmation Page has 2 listings: 1 new, 1 updated
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and one updated listing. Both 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 4 January '09
Minor Planet Electronic Circulars
As of last check at 2358 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
<< DOU on 4 Jan. '09 >> MPEC 2009-A30 - "07:10 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K08Y32Y 2008 YY32 (small asteroid, arc=4 days, H=25.2 ~31m) from Great Shefford Obs. (Jan. 4.11-13p3)
- K08Y32V 2008 YV32 (small asteroid, arc=3 days, H=26.3 ~19m) from Astronomical Research Obs. (ARO) (Jan. 3.07p3)
- K08Y29F 2008 YF29 (small asteroid, arc=5 days, H=24.1 ~51m) from ARO (Jan. 3.22-23p4) and Guidestar Obs. (Jan. 3.79p2)
- K08X02U 2008 XU2 (small asteroid, Q=4.001 AU, arc=28 days, H=25.6 ~26m) from ARO (Jan. 3.17p1 at V=23.2, 3.22p1 at V=23.6 & 3.26p1 at V=23.0)
- E4898 144898 2004 VD17 from the Mt. Lemmon Survey (MLS) (Jan. 3.38-41p4 at V=21.4-22.3)
- Observations of recently (no longer) risk-listed objects
- K08Y30U 2008 YU30 (small asteroid, arc=4 days, H=23.2 ~78m) from Great Shefford Obs. (Jan. 4.14-16p3)
- K08Y29E 2008 YE29 (Q=4.522 AU, arc=4 days, H=20.2 ~309m) from Desert Moon Obs. (Jan. 3.15-17p3)
- K08Y02N 2008 YN2 (small asteroid, arc=13 days, H=26.3 ~19m) from ARO (Jan. 3.09-14p3 at V=22.6-23.0)
- Observations of small asteroids (H>22.0)
- K08Y30G 2008 YG30 (arc=4 days, H=24.6 ~41m) from Sormano Obs. (Jan. 2.93-94p2), Atlante Obs. (Jan. 3.07p3), and Great Shefford Obs. (Jan. 3.92p3)
- K08Y27N 2008 YN27 (arc=6 days, H=22.1 ~129m) from ARO (Jan. 3.20-21p4) and Guidestar Obs. (Jan. 3.75-78p3)
- K08Y27M 2008 YM27 (arc=5 days, H=23.4 ~71m) from ARO (Jan. 3.21-22p6)
- K08Y03G 2008 YG3 (Q=4.079 AU, arc=12 days, H=22.2 ~123m) from ARO (Jan. 3.25-26p3)
- Observations of other objects
- K09A00U 2009 AU (arc=1 day, H=20.9 ~224m) from ARO (Jan. 3.28-30p3 at V=21.8-22.1)
- K09A00T 2009 AT (Q=7.026 AU, arc=2 days, H=21.0 ~214m) from Great Shefford Obs. (Jan. 4.09-10p3)
- K09A00N 2009 AN (arc=3 days, H=20.4 ~282m) from Great Shefford Obs. (Jan. 4.06-08p3)
- K09A00M 2009 AM (Q=4.673 AU, arc=3 days, H=21.3 ~186m) from Great Shefford Obs. (Jan. 4.01-02p2)
- K09A00K 2009 AK (Q=4.164 AU, arc=2 days, H=19.6 ~407m) from ARO (Jan. 3.04-06p3)
- K08Y28Z 2008 YZ28 (arc=4 days, H=20.1 ~323m) from ARO (Jan. 3.01-02p5)
- K08Y27S 2008 YS27 (arc=5 days, H=21.2 ~195m) from Desert Moon Obs. (Jan. 3.45-50p3)
- K08Y27O 2008 YO27 (i=40.9°, arc=5 days, H=20.9 ~224m) from ARO (Jan. 3.23-24p5)
- K08Y26G 2008 YG26 (arc=5 days, H=21.6 ~162m) from the Catalina Sky Survey (CSS) (Jan. 3.23-25p3) and ARO (Jan. 3.24-25p5)
- K08Y02K 2008 YK2 (arc=14 days, H=19.6 ~407m) from Atlante Obs. (Jan. 3.04-05p3) and Hamamatsu-Yuto Obs. (Jan. 3.70-75p5)
- K08Y00F 2008 YF (arc=15 days, H=20.9 ~224m) from Sormano Obs. (Jan. 2.96-97p3)
- K08W63Q 2008 WQ63 (arc=2 opp, H=20.1 ~323m) from Hamamatsu-Yuto Obs. (Jan. 3.81-84p5)
- K08W60L 2008 WL60 (arc=41 days, H=18.2 ~776m) from Hamamatsu-Yuto Obs. (Jan. 3.61-65p5)
- K08W60H 2008 WH60 (arc=41 days, H=20.8 ~234m) from ARO (Jan. 3.12-13p3)
- K08W59B 2008 WB59 (arc=41 days, H=19.4 ~446m) from ARO (Jan. 3.08-10p3)
- K08W32M 2008 WM32 (i=39.1°, arc=43 days, H=19.8 ~371m) from ARO (Jan. 3.17-18p3)
- K08W32K 2008 WK32 (arc=43 days, H=19.3 ~467m) from ARO (Jan. 3.03-04p3)
- K08T03Z 2008 TZ3 (arc=31 days, H=20.4 ~282m) from David Tholen's team on Mauna Kea (2008 Oct. 9.34-35p4)
- K08S82H 2008 SH82 (arc=99 days, H=21.4 ~178m) from Hamamatsu-Yuto Obs. (Jan. 3.58-60p6)
- K08S07P 2008 SP7 (Q=4.200 AU, arc=102 days, H=18.9 ~562m) from ARO (Jan. 3.14-15p3)
- K08S01Q 2008 SQ1 (Q=4.682 AU, arc=2 opp, H=18.5 ~676m) from Klet Obs. (Jan. 3.84-85p5)
- K08S01N 2008 SN1 (Q=4.025 AU, arc=105 days, H=19.6 ~407m) from ARO (Jan. 3.05-06p2 at V=21.9-22.1)
- K08R26S 2008 RS26 (Q=4.801 AU, arc=123 days, H=18.0 ~851m) from ARO (Jan. 3.10-11p3)
- K08Q03T 2008 QT3 (arc=131 days, H=18.7 ~616m) from ARO (Jan. 3.01-02p5)
- K08E05V 2008 EV5 (arc=2 opp, H=20.0 ~339m) from Hamamatsu-Yuto Obs. (Jan. 3.52-54p26)
- K06W01Q 2006 WQ1 (arc=2 opp, H=19.4 ~446m) from Desert Moon Obs. (Jan. 3.28-36p3)
- K06SL7Z 2006 SZ217 (arc=3 opp, H=17.4 ~1.12 km) from Pinsoro Obs. (Nov. 16.09-10p5)
- K05V05O 2005 VO5 (arc=2 opp, H=19.8 ~371m) from the Spacewatch 0.9m telescope (Dec. 21.35-39p3)
- K05B00C 2005 BC (arc=2 opp, H=18.0 ~851m) from Hamamatsu-Yuto Obs. (Jan. 3.75-78p12)
- K04L03V 2004 LV3 (arc=2 opp, H=18.9 ~562m) from Hamamatsu-Yuto Obs. (Jan. 3.47-50p3)
- K02N16W 2002 NW16 (arc=2 opp, H=18.0 ~851m) from Spacewatch 0.9m (Dec. 22.52-54p2)
- K02A11W 2002 AW11 (arc=4 opp, H=18.5 ~676m) from Desert Moon Obs. (Jan. 3.53-54p2)
- G2183 162183 1999 NB5 from Spacewatch 0.9m (Dec. 21.26-28p2)
- F3814 153814 2001 WN5 from Spacewatch 0.9m (Dec. 21.24-26p2)
- E1052 141052 2001 XR1 from Engelhardt Obs. Zelenchukskaya Station (Jan. 1.89-91p4)
- 88264 88264 2001 KN20 from Spacewatch 0.9m (Dec. 21.31-34p3)
- 87684 87684 2000 SY2 from CSS (Jan. 3.08-09p4)
- 85774 85774 1998 UT18 from Pinsoro Obs. (Nov. 16.05-06p3)
- 52768 52768 1998 OR2 from Desert Moon Obs. (Jan. 3.42-43p5)
- 22099 22099 2000 EX106 from program code "\" (26) via RAS Obs. Mayhill (Jan. 4.07-13p4)
- 18882 18882 1999 YN4 from Desert Moon Obs. (Jan. 3.39-40p3)
- 08013 8013 Gordonmoore (1990 KA) from Spacewatch 0.9m (Dec. 21.31-32p2)
- 04544 4544 Xanthus (1989 FB) from Deep Sky Obs. (Jan. 2.72-74p3)
- 04179 4179 Toutatis (1989 AC) from Pinsoro Obs. (Nov. 16.23-24p4)
- 03360 3360 Syrinx (1981 VA) from Deep Sky Obs. (Jan. 2.82-84p3)
- 01863 1863 Antinous (1948 EA) from CSS (Jan. 3.38-40p4)
Observers on 4 January '09
Sixteen observing facilities appear in today's MPEC.
| Code | Observer / observatory |
|---|---|
| H55 | Astronomical Research Obs. (ARO) in Illinois, 20 in MPEC 2009-A30 -- 2009 AU, 2009 AK, 2008 YZ28, 2008 YV32, 2008 YO27, 2008 YN27, 2008 YN2, 2008 YM27, 2008 YG3, 2008 YG26, 2008 YF29, 2008 XU2, 2008 WM32, 2008 WK32, 2008 WH60, 2008 WB59, 2008 SP7, 2008 SN1, 2008 RS26, 2008 QT3 |
| J51 | Atlante Obs. in the Canary Islands, 2 in MPEC 2009-A30 -- 2008 YK2, 2008 YG30 |
| 703 | Catalina Sky Survey (CSS) in Arizona, 3 in MPEC 2009-A30 -- 2008 YG26, 87684, 1863 |
| B60 | Deep Sky Obs. in Germany, 2 in MPEC 2009-A30 -- 4544, 3360 |
| 448 | Desert Moon Obs. in New Mexico, 6 in MPEC 2009-A30 -- 2008 YS27, 2008 YE29, 2006 WQ1, 2002 AW11, 52768, 18882 |
| 114 | Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2009-A30 -- 141052 |
| J95 | Great Shefford Obs. in England, 6 in MPEC 2009-A30 -- 2009 AT, 2009 AN, 2009 AM, 2008 YY32, 2008 YU30, 2008 YG30 |
| A17 | Guidestar Obs. in Germany, 2 in MPEC 2009-A30 -- 2008 YN27, 2008 YF29 |
| 379 | Hamamatsu-Yuto Obs. in Japan, 7 in MPEC 2009-A30 -- 2008 YK2, 2008 WQ63, 2008 WL60, 2008 SH82, 2008 EV5, 2005 BC, 2004 LV3 |
| 046 | Klet Obs. in the Czech Republic, 1 in MPEC 2009-A30 -- 2008 SQ1 |
| 5682 | David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2009-A30 -- 2008 TZ3 |
| G96 | Mt. Lemmon Survey in Arizona, 1 in MPEC 2009-A30 -- 144898 |
| J52 | Pinsoro Obs. in Spain, 3 in MPEC 2009-A30 -- 2006 SZ217, 85774, 4179 |
| H06\ | program code "\" (26) via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-A30 -- 22099 |
| 587 | Sormano Obs. in Italy, 2 in MPEC 2009-A30 -- 2008 YG30, 2008 YF |
| 691 | Spacewatch 0.9m telescope in Arizona, 6 in MPEC 2009-A30 -- 2005 VO5, 2002 NW16, 88264, 162183, 153814, 8013 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 4 January '09
| 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 |
| 2009 AV | NEODyS | 1433 | 2010-2085 | 75 | 3.16e-08 | -2.68 | -2.81 | 0 | NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2009/01/02.541 to 2009/01/03.539." |
| 2008 YY32 | JPL Sentry | 1433 | R E M O V E D | JPL: Risk listing removed at 1030 UTC. | |||||
| 2008 YV32 | JPL Sentry | 1433 | 2085-2107 | 14 | 7.5e-06 | -6.09 | -6.69 | 0 | JPL: "Analysis based on 33 observations spanning 2.9281 days (2008-Dec-31.22029 to 2009-Jan-03.14842)." Diameter approximately 0.019 km. from mean, weighted H=26.3. |
| NEODyS | 1433 | 2072-2090 | 6 | 2.12e-06 | -6.58 | -7.03 | 0 | NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2008/12/31.221 to 2009/01/03.149." | |
| 2008 YF29 | NEODyS | 1433 | 2090 | 1 | 1.77e-07 | -6.65 | -6.65 | 0 | NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2008/12/30.250 to 2009/01/03.793." |
| JPL Sentry | 1433 | R E M O V E D | JPL: Risk listing removed at 0950 UTC. | ||||||
| 2008 XU2 | JPL Sentry | 1433 | 2039 | 1 | 2.9e-07 | -6.65 | -6.65 | 0 | JPL: "Analysis based on 44 observations spanning 27.997 days (2008-Dec-06.2616 to 2009-Jan-03.258608)." Diameter approximately 0.026 km. from mean, weighted H=25.6. |
| NEODyS | 1433 | 2039 | 1 | 3.01e-07 | -6.64 | -6.64 | 0 | NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2008/12/06.262 to 2009/01/03.259." | |
| 144898 2004 VD17 | NEODyS | 1532 | 2102-2104 | 2 | 5.64e-08 | -4.91 | -4.91 | 0 | NEODyS: "Based on 974 optical observations (of which 4 are rejected as outliers) from 2002/02/16.463 to 2009/01/03.407." |
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 January '09
Times are UTC for when items were noted or added by The Tracking News.
| 1532 | Noted that NEODyS has updated its 2004 VD17 risk assessment - see above |
| 1433 | Noted that JPL Sentry has updated its 2008 XU2 risk assessment - see above Noted that NEODyS has updated its 2008 XU2 risk assessment - see above Noted that JPL Sentry has removed 2008 YF29 as an impact risk - see above Noted that NEODyS has updated its 2008 YF29 risk assessment - see above Noted that JPL Sentry has updated its 2008 YV32 risk assessment - see above Noted that NEODyS has updated its 2008 YV32 risk assessment - see above Noted that JPL Sentry has removed 2008 YY32 as an impact risk - see above Noted that NEODyS has posted 2009 AV as an impact risk - see above Grabbed MPEC 2009-A30 - Daily Orbit Update - see above |
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