Southern Jupiter impact? The bright infrared signature of an unusual optically dark spot is seen in this July 20th image from the Infrared Telescope Facility (IRTF) on Mauna Kea in Hawaii after discovery by amateur astronomer Anthony Wesley in New South Wales. See more images. This image courtesy of NASA/JPL/IRTF.
Sound and look familiar? It was exactly fifteen years ago that pieces of comet C/Shoemaker-Levy 9 (1993e) struck Jupiter, during 16-22 July 1994.
Contents on 21 July '09
- IAU Minor Planet Center
- NEOCP Activity -- two listings: 1 new, 1 updated
- New MPECs -- five MPECs
- Observers -- 20 observing facilities
- Impact Risk Monitoring -- one object
- 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 21 July '09
The MPC's NEO Confirmation Page has 2 listings: 1 new, 1 updated
When last checked at 2309 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and one updated listing. Of these, one was a "one nighter." So far The Tracking News has counted a total of three listings on the NEOCP at some point today.
To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.
New MPECs on 21 July '09
Minor Planet Electronic Circulars
As of last check at 2309 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2009-O18 time-stamped "02:08 UT" - Comets C/2009 K11, 2009 K12, 2009 K13, 2009 K14 (SOHO) - see below
- MPEC 2009-O19 time-stamped "02:16 UT" - Comets C/2009 L3, 2009 L4, 2009 L5, 2009 L6 (SOHO) - see below
- MPEC 2009-O20 time-stamped "06:09 UT" - Daily Orbit Update - see below
- MPEC 2009-O21 time-stamped "22:03 UT" - Comets C/2009 L7, 2009 L8, 2009 L9, 2009 L10, 2009 L11 (SOHO) - see below
- MPEC 2009-O22 time-stamped "22:08 UT" - Comets C/2009 L12, 2009 L13, 2009 L14, 2009 L15 (SOHO)
MPEC 2009-O22 - "22:08 UT" - Comets C/2009 L12, 2009 L13, 2009 L14, 2009 L15 (SOHO)
- CK09L150 C/2009 L15 from the LASCO Coronagraph 2 aboard the Solar & Heliospheric Obs. (SOHO) (June 10.91-09p24)
- CK09L140 C/2009 L14 from SOHO C2 (June 10.18-28p16)
- CK09L130 C/2009 L13 from SOHO C2 (June 9.18-31p18)
- CK09L120 C/2009 L12 from SOHO C2 (June 8.89-02p18)
MPEC 2009-O21 - "22:03 UT" - Comets C/2009 L7, 2009 L8, 2009 L9, 2009 L10, 2009 L11 (SOHO)
- CK09L110 C/2009 L11 from SOHO C2 (June 7.67-81p18)
- CK09L100 C/2009 L10 from SOHO C2 (June 7.33-46p14)
- CK09L090 C/2009 L9 from SOHO C2 (June 7.23-46p26)
- CK09L080 C/2009 L8 from SOHO C2 (June 6.98-10p18 & 7.40-54p18)
- CK09L070 C/2009 L7 from SOHO C2 (June 1.38-59p28)
<< DOU on 21 July '09 >> MPEC 2009-O20 - "06:09 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K09O00F 2009 OF (arc=4 days, H=21.4 ~178m) from Sormano Obs. (July 19.95p3 & 20.87-88p3), Astronomical Research Obs. (ARO) (July 20.17-18p5), Verona Obs. (July 20.86-87p4), and Eschenberg Obs. (July 20.86-87p7)
- Observations of recently (no longer) risk-listed objects
- K09N00A 2009 NA (Q=4.139 AU, arc=19 days, H=17.5 ~1.07 km) from ARO (July 20.26-27p3)
- K09M09B 2009 MB9 (Q=4.946 AU, arc=21 days, H=18.7 ~616m) from the Siding Spring Survey (SSS) (July 20.47p1)
- K09M08N 2009 MN8 (small asteroid, arc=22 days, H=22.6 ~102m) from ARO (July 20.22-23p3)
- Observations of small asteroids (H>22.0)
- K09M08M 2009 MM8 (arc=27 days, H=24.7 ~39m) from Hibiscus Obs. (July 20.52-54p5) and SSS (July 20.82p2)
- Observations of other objects
- K09O00G 2009 OG (i=48.8°, q=0.382 AU, Q=5.234 AU, arc=3 days, H=16.0 ~2.14 km) from SSS (July 20.84p1)
- K09O00C 2009 OC (arc=2 opp, H=20.3 ~295m) from Lumezzane Obs. (July 19.01-02p4) and Doc Greiner Research Obs. (DGRO) (July 20.16-17p4)
- K09N00L 2009 NL (Q=4.748 AU, arc=7 days, H=20.0 ~339m) from Lumezzane Obs. (July 19.08p4), Naef Obs. (July 19.90-91p4), and ARO (July 20.24-25p4)
- K09N00J 2009 NJ (arc=9 days, H=18.5 ~676m) from ARO (July 20.11-12p5), Eschenberg Obs. (July 20.85-86p3), Sormano Obs. (July 20.86p3), and Mandi Obs. (July 20.91-92p4)
- K09N00H 2009 NH (arc=10 days, H=18.8 ~589m) from Lumezzane Obs. (July 19.04p4), DGRO (July 20.17-19p5), ARO (July 20.20-21p5), and Naef Obs. (July 20.95-98p2)
- K09N00E 2009 NE (q=0.361 AU, Q=4.987 AU, arc=4 opp, H=15.8 ~2.34 km) from Lumezzane Obs. (July 18.98-99p4) and DGRO (July 20.13-14p6)
- K09M09C 2009 MC9 (arc=20 days, H=17.9 ~891m) from SSS (July 20.36p2)
- K09M06X 2009 MX6 (arc=26 days, H=19.2 ~490m) from ARO (July 20.12-13p5)
- K09M01M 2009 MM1 (arc=27 days, H=21.7 ~155m) from SSS (July 20.81p2)
- K09M01L 2009 ML1 (arc=27 days, H=19.4 ~446m) from ARO (July 20.29-30p4)
- K09L00S 2009 LS (i=45.0°, arc=38 days, H=18.0 ~851m) from ARO (July 20.14-15p3)
- K09K22J 2009 KJ22 (arc=51 days, H=19.9 ~355m) from Naef Obs. (July 20.95-97p2)
- K09K07C 2009 KC7 (Q=4.055 AU, arc=55 days, H=19.4 ~446m) from Sormano Obs. (July 20.91-92p3)
- K09K00J 2009 KJ (q=0.351 AU, arc=65 days, H=17.1 ~1.29 km) from SSS (July 20.38p1)
- K09H21D 2009 HD21 (Q=4.668 AU, arc=119 days, H=18.2 ~776m) from Sormano Obs. (July 20.89-90p3)
- K09D01N 2009 DN1 (arc=151 days, H=20.3 ~295m) from ARO (July 20.10p4)
- K09C05Q 2009 CQ5 (arc=156 days, H=17.6 ~1.02 km) from SSS (July 20.37p2)
- K08C00M 2008 CM (arc=2 opp, H=17.2 ~1.23 km) from Eschenberg Obs. (July 20.88-90p3)
- K07L00L 2007 LL (arc=3 opp, H=20.4 ~282m) from Lumezzane Obs. (July 19.02p4) and Verona Obs. (July 20.88-90p4)
- K06K86Z 2006 KZ86 (q=0.302 AU, Q=4.081 AU, arc=2 opp, H=18.2 ~776m) from Mt. John Obs. (July 20.30-33p5)
- K05M00C 2005 MC (Q=4.169 AU, arc=3 opp, H=16.3 ~1.86 km) from Lumezzane Obs. (July 19.05p4)
- K02L00V 2002 LV (arc=3 opp, H=16.6 ~1.62 km) from Eschenberg Obs. (July 20.84p3) and Thompsonville Obs. (July 21.21-22p6)
- K01A50A 2001 AA50 (i=43.9°, arc=4 opp, H=18.5 ~676m) from Naef Obs. (July 20.00-01p7)
- K00T64O 2000 TO64 (i=37.4°, Q=4.445 AU, arc=4 opp, H=16.7 ~1.55 km) from Herrenberg Obs. (July 19.87-88p3)
- L5442 215442 2002 MQ3 from Lumezzane Obs. (July 18.87-88p4)
- G3051 163051 2001 YJ4 from Wildberg Obs. (July 20.94-96p3)
- G2483 162483 2000 PJ5 from Lumezzane Obs. (July 18.99-00p4) and Atlante Obs. (July 20.95-96p3)
- 68216 68216 2001 CV26 from North Ryde Obs. (July 19.66-68p2 & 20.64-65p2)
- 65733 65733 1993 PC from La Sagra Obs. (July 18.04-07p3)
- 52750 52750 1998 KK17 from La Sagra Obs. (July 21.11-13p3)
- 24761 24761 Ahau (1993 BW2) from La Sagra Obs. (July 19.08-10p3 & 20.97-99p3)
- 17274 17274 2000 LC16 from SSS (July 20.64-68p5)
- 14402 14402 1991 DB from Lumezzane Obs. (July 18.00-01p4)
- 11500 11500 Tomaiyowit (1989 UR) from Wildberg Obs. (July 20.87-90p4)
- 07822 7822 1991 CS from Lumezzane Obs. (July 18.89p4)
- 05786 5786 Talos (1991 RC) from Engelhardt Obs. Zelenchukskaya Station (July 20.98-01p6)
- 05626 5626 1991 FE from La Sagra Obs. (July 18.01-03p6)
- 05620 5620 Jasonwheeler (1990 OA) from Thompsonville Obs. (July 21.19-21p6)
- 04015 4015 Wilson-Harrington (1979 VA) from SSS (July 20.57p1)
MPEC 2009-O19 - "02:16 UT" - Comets C/2009 L3, 2009 L4, 2009 L5, 2009 L6 (SOHO)
- CK09L060 C/2009 L6 from the LASCO Coronagraph 3 aboard the Solar & Heliospheric Obs. (SOHO) (June 5.99-11p12, 6.18p2, 6.22-28p8, 6.32p2, 6.36p2 & 6.40-53p12) and SOHO C2 (June 6.54-73p26)
- CK09L050 C/2009 L5 from SOHO C2 (June 4.89-09p24)
- CK09L040 C/2009 L4 from SOHO C3 (June 3.89-90p4, 3.97-99p4, 4.03-28p22, 4.32-40p10, 4.47-53p8 & 4.57-78p22), the COR2-A instrument (5) aboard STEREO-A (June 4.62-70p10, 4.79p2 & 4.85-97p12), and SOHO C2 (June 4.75-03p34)
- CK09L030 C/2009 L3 from SOHO C2 (June 3.78-96p24)
MPEC 2009-O18 - "02:08 UT" - Comets C/2009 K11, 2009 K12, 2009 K13, 2009 K14 (SOHO)
- CK09K140 C/2009 K14 from SOHO C2 (May 31.75-83p12)
- CK09K130 C/2009 K13 from SOHO C2 (May 31.17-19p4 & 31.23-34p16)
- CK09K120 C/2009 K12 from SOHO C2 (May 30.40-50p14)
- CK09K110 C/2009 K11 from SOHO C3 (May 29.22-53p26 & 29.57-66p9) and SOHO C2 (May 29.66-75p15)
Observers on 21 July '09
A total of 20 observing facilities appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| H55 | Astronomical Research Obs. (ARO) in Illinois, 10 in MPEC 2009-O20 -- 2009 OF, 2009 NL, 2009 NJ, 2009 NH, 2009 NA, 2009 MX6, 2009 MN8, 2009 ML1, 2009 LS, 2009 DN1 |
| J51 | Atlante Obs. in the Canary Islands, 1 in MPEC 2009-O20 -- 162483 |
| H26 | Doc Greiner Research Obs. (DGRO) in Wisconsin, 3 in MPEC 2009-O20 -- 2009 OC, 2009 NH, 2009 NE |
| 114 | Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2009-O20 -- 5786 |
| 151 | Eschenberg Obs. in Switzerland, 4 in MPEC 2009-O20 -- 2009 OF, 2009 NJ, 2008 CM, 2002 LV |
| 240 | Herrenberg Obs. in Germany, 1 in MPEC 2009-O20 -- 2000 TO64 |
| F84 | Hibiscus Obs. in Tahiti, 1 in MPEC 2009-O20 -- 2009 MM8 |
| J75 | La Sagra Obs. in Spain, 4 in MPEC 2009-O20 -- 65733, 52750, 24761, 5626 |
| 130 | Lumezzane Obs. in Italy, 10 in MPEC 2009-O20 -- 2009 OC, 2009 NL, 2009 NH, 2009 NE, 2007 LL, 2005 MC, 215442, 162483, 14402, 7822 |
| B28 | Mandi Obs. in Italy, 1 in MPEC 2009-O20 -- 2009 NJ |
| 474 | Mt. John Obs. in New Zealand, 1 in MPEC 2009-O20 -- 2006 KZ86 |
| A13 | Naef Obs. in Switzerland, 4 in MPEC 2009-O20 -- 2009 NL, 2009 NH, 2009 KJ22, 2001 AA50 |
| 423 | North Ryde Obs. in New South Wales, 1 in MPEC 2009-O20 -- 68216 |
| C495 | COR2-A instrument (5) aboard STEREO-A in heliocentric orbit leading Earth, 1 in MPEC 2009-O19 -- C/2009 L4 |
| E12 | Siding Spring Survey (SSS) in New South Wales, 9 in MPEC 2009-O20 -- 2009 OG, 2009 MM8, 2009 MM1, 2009 MC9, 2009 MB9, 2009 KJ, 2009 CQ5, 17274, 4015 |
| 2492 | LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 17 in MPECs 2009-O18, 2009-O19, 2009-O21 & 2009-O22 -- C/2009 L9, C/2009 L8, C/2009 L7, C/2009 L6, C/2009 L5, C/2009 L4, C/2009 L3, C/2009 L15, C/2009 L14, C/2009 L13, C/2009 L12, C/2009 L11, C/2009 L10, C/2009 K14, C/2009 K13, C/2009 K12, C/2009 K11 |
| 2493 | LASCO Coronagraph 3 (SOHO C3) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 3 in MPECs 2009-O18 & 2009-O19 -- C/2009 L6, C/2009 L4, C/2009 K11 |
| 587 | Sormano Obs. in Italy, 4 in MPEC 2009-O20 -- 2009 OF, 2009 NJ, 2009 KC7, 2009 HD21 |
| H53 | Thompsonville Obs. in Illinois, 2 in MPEC 2009-O20 -- 2002 LV, 5620 |
| A48 | Verona Obs. in Italy, 2 in MPEC 2009-O20 -- 2009 OF, 2007 LL |
| 198 | Wildberg Obs. in Germany, 2 in MPEC 2009-O20 -- 163051, 11500 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 21 July '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 OF | JPL Sentry | 1338 | 2039 | 2 | 2.3e-06 | -3.63 | -3.64 | 0 | JPL: "Analysis based on 47 observations spanning 3.6634 days (2009-Jul-17.21281 to 2009-Jul-20.87623)." Diameter approximately 0.180 km. from mean, weighted H=21.3. |
| NEODyS | 1338 | 2039 | 2 | 2.44e-06 | -3.61 | -3.63 | 0 | NEODyS: "Based on 47 optical observations (of which 1 are rejected as outliers) from 2009/07/17.214 to 2009/07/20.877." | |
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 21 July '09
Times are UTC for when items were noted or added by The Tracking News.
| 2310 | Grabbed MPEC 2009-O21 - Comets C/2009 L7, 2009 L8, 2009 L9, 2009 L10, 2009 L11 (SOHO) - see above Grabbed MPEC 2009-O22 - Comets C/2009 L12, 2009 L13, 2009 L14, 2009 L15 (SOHO) - see above |
| 1338 | Noted that JPL Sentry has updated its 2009 OF risk assessment - see above Noted that NEODyS has updated its 2009 OF risk assessment - see above Grabbed MPEC 2009-O20 - Daily Orbit Update - see above |
| 0251 | Grabbed MPEC 2009-O18 - Comets C/2009 K11, 2009 K12, 2009 K13, 2009 K14 (SOHO) - see above Grabbed MPEC 2009-O19 - Comets C/2009 L3, 2009 L4, 2009 L5, 2009 L6 (SOHO) - see above |
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