On this day six years ago, the NASA Deep Space 1 spacecraft flew past the nucleus of comet 19P/Borrelly, which, as seen in this best image, was found to be about 10 km. long. Credit: NASA/JPL.
Contents on 22 September '07
- IAU Minor Planet Center
- NEOCP Activity -- nine listings: 1 new, 8 updated
- New MPECs -- one MPEC
- Observers -- ten observing facilities
- Impact Risk Monitoring -- two objects reported
- Chronology
Resources:
Notes: Due to travel, these pages will update irregularly for the rest of the month.
Until September 16th this daily news page, which had included links to news and science papers as well as some occasional original reporting, was called Major News About Minor Objects. Without the news-link and science-link sections, this page was renamed as The Tracking News to more more accurately reflect its continuing purpose.
The latest news: framed access (best), RSS news feed (flags updates), or redirection - Note: A/CC has a main Web site and a backup site.
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 this year 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 22 September '07
The MPC's NEO Confirmation Page has 9 listings: 1 new, 8 updated
When last checked at 2347 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and eight updated listings. Of these, two 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 22 September '07
Minor Planet Electronic Circulars
As of last check at 2347 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
<< DOU on 22 Sept. '07 >> MPEC 2007-S40 - "06:10 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K07S00J 2007 SJ (arc=4 days, H=16.2 ~1.95 km) from Astronomical Research Obs. (ARO) (Sept. 21.09-11p3) and the Siding Spring Survey (SSS) (Sept. 21.45p2)
- K07R19Y 2007 RY19 (small asteroid, arc=7 days, H=22.5 ~107m) from program code "[" via Kitt Peak Natl. Obs. (KPNO) (Sept. 20.46-49p6) and ARO (Sept. 21.34-35p3)
- Observations of recently (no longer) risk-listed objects
- K07RE6T 2007 RT146 (arc=6 days, H=18.4 ~708m) from ARO (Sept. 21.36p3)
- K07R19X 2007 RX19 (i=39.9°, arc=7 days, H=18.4 ~708m) from SSS (Sept. 21.44p2)
- Observations of small asteroids (H>22.0)
- K07S01V 2007 SV1 (arc=1 day, H=24.7 ~39m) from ARO (Sept. 21.20-21p3)
- K07S01U 2007 SU1 (arc=1 day, H=25.5 ~27m) from SSS (Sept. 20.52p2)
- K07S01S 2007 SS1 (arc=2 days, H=23.6 ~65m) from SSS (Sept. 20.47p2, 20.79p2 & 21.48-49p2)
- K07R17S 2007 RS17 (arc=8 days, H=22.8 ~93m) from ARO (Sept. 21.22-23p3)
- K07R17Q 2007 RQ17 (arc=8 days, H=22.6 ~102m) from ARO (Sept. 21.13-14p3)
- K07R09Y 2007 RY9 (arc=7 days, H=23.4 ~71m) from SSS (Sept. 18.52p3)
- Observations of other objects
- K07S02W 2007 SW2 (arc=1 day, H=21.3 ~186m) from ARO (Sept. 21.25-26p3)
- K07R19V 2007 RV19 (Q=5.713 AU, arc=6 days, H=18.7 ~616m) from SSS (Sept. 20.43-45p4)
- K07R17U 2007 RU17 (q=0.350 AU, arc=8 days, H=18.1 ~812m) from the Spacewatch 0.9m telescope (Sept. 21.38-39p3)
- K07R05F 2007 RF5 (arc=16 days, H=18.5 ~676m) from LINEAR (Sept. 21.34-39p5)
- K07P11U 2007 PU11 (Q=4.384 AU, arc=3 opp, H=16.3 ~1.86 km) from LINEAR (Sept. 21.29-34p4), Hamamatsu-Yuto Obs. (Sept. 21.75-76p6), and Celbridge Obs. (Sept. 21.84p1)
- K07P09R 2007 PR9 (arc=41 days, H=20.6 ~257m) from SSS (Sept. 21.59-62p4)
- K07O00V 2007 OV (arc=66 days, H=19.2 ~490m) from Lumezzane Obs. (Sept. 19.99-00p4)
- K07L32R 2007 LR32 (arc=119 days, H=17.2 ~1.23 km) from Hamamatsu-Yuto Obs. (Sept. 21.51-53p4)
- K07L19Q 2007 LQ19 (Q=4.246 AU, arc=100 days, H=17.6 ~1.02 km) from LINEAR (Sept. 21.42-46p4)
- K07L15A 2007 LA15 (arc=99 days, H=19.5 ~426m) from SSS (Sept. 20.48-51p4)
- K07DA3T 2007 DT103 (arc=2 opp, H=19.2 ~490m) from SSS (Sept. 20.66-69p4)
- K05S00G 2005 SG (arc=4 opp, H=18.9 ~562m) from LINEAR (Sept. 21.40-45p5)
- K04O11T 2004 OT11 (arc=3 opp, H=17.3 ~1.17 km) from Lumezzane Obs. (Sept. 19.78-81p4)
- K02S00V 2002 SV (arc=2 opp, H=19.8 ~371m) from SSS (Sept. 21.45p10), Hamamatsu-Yuto Obs. (Sept. 21.55-57p5), and Celbridge Obs. (Sept. 21.88p4)
- K02RC9T 2002 RT129 (arc=2 opp, H=19.5 ~426m) from LINEAR (Sept. 21.28-32p4) and Spacewatch 0.9m (Sept. 21.38-39p3)
- K01SR0A 2001 SA270 (i=38.5°, q=0.345 AU, arc=4 opp, H=18.0 ~851m) from Lumezzane Obs. (Sept. 20.01-02p4)
- K00R37W 2000 RW37 (arc=3 opp, H=20.0 ~339m) from Lumezzane Obs. (Sept. 19.95-96p4)
- J99J03U 1999 JU3 (arc=4 opp, H=19.2 ~490m) from Drebach Obs. (Sept. 20.78-79p4) and Celbridge Obs. (Sept. 21.89p1)
- J98V00R 1998 VR (arc=4 opp, H=18.5 ~676m) from SSS (Sept. 21.68-71p4)
- J98S15D 1998 SD15 (arc=4 opp, H=19.2 ~490m) from Drebach Obs. (Sept. 20.78p6), Hamamatsu-Yuto Obs. (Sept. 21.48-49p6), and Celbridge Obs. (Sept. 21.89p1)
- J88P00A 1988 PA (arc=3 opp, H=17.4 ~1.12 km) from LINEAR (Sept. 21.34-39p5)
- E3678 143678 2003 SA224 from LINEAR (Sept. 21.34-37p3)
- D6849 136849 1998 CS1 from SSS (Sept. 20.58-61p4)
- 21374 21374 1997 WS22 from the Catalina Sky Survey (CSS) (Sept. 21.49-51p4)
- 20826 20826 2000 UV13 from Lumezzane Obs. (Sept. 20.03-04p3)
- 05786 5786 Talos (1991 RC) from Lumezzane Obs. (Sept. 19.97-98p4)
- 03753 3753 Cruithne (1986 TO) from SSS (Sept. 21.68-71p3)
Observers on 22 September '07
Ten observing facilities appear in today's MPEC.
| Code | Observer / observatory |
|---|---|
| H55 | Astronomical Research Obs. in Illinois, 7 in MPEC 2007-S40 -- 2007 SW2, 2007 SV1, 2007 SJ, 2007 RY19, 2007 RT146, 2007 RS17, 2007 RQ17 |
| 703 | Catalina Sky Survey in Arizona, 1 in MPEC 2007-S40 -- 21374 |
| J65 | Celbridge Obs. in Ireland, 4 in MPEC 2007-S40 -- 2007 PU11, 2002 SV, 1999 JU3, 1998 SD15 |
| 113 | Drebach Obs. in Germany, 2 in MPEC 2007-S40 -- 1999 JU3, 1998 SD15 |
| 379 | Hamamatsu-Yuto Obs. in Japan, 4 in MPEC 2007-S40 -- 2007 PU11, 2007 LR32, 2002 SV, 1998 SD15 |
| 695[ | program code "[" via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2007-S40 -- 2007 RY19 |
| 704 | LINEAR in New Mexico, 7 in MPEC 2007-S40 -- 2007 RF5, 2007 PU11, 2007 LQ19, 2005 SG, 2002 RT129, 1988 PA, 143678 |
| 130 | Lumezzane Obs. in Italy, 6 in MPEC 2007-S40 -- 2007 OV, 2004 OT11, 2001 SA270, 2000 RW37, 20826, 5786 |
| E12 | Siding Spring Survey in New South Wales, 13 in MPEC 2007-S40 -- 2007 SU1, 2007 SS1, 2007 SJ, 2007 RY9, 2007 RX19, 2007 RV19, 2007 PR9, 2007 LA15, 2007 DT103, 2002 SV, 1998 VR, 136849, 3753 |
| 691 | Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2007-S40 -- 2007 RU17, 2002 RT129 |
Impact Risk Monitoring on 22 September '07
| 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 |
| 2007 SJ | NEODyS | 1352 | 2014-2085 | 25 | 7.06e-07 | -1.58 | -2.13 | 0 | NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2007/09/17.183 to 2007/09/21.454." |
| JPL | 1351 | 2017-2105 | 39 | 4.1e-07 | -1.88 | -2.13 | 0 | JPL: "Analysis based on 37 observations spanning 4.2707 days (2007-Sep-17.18208 to 2007-Sep-21.45275)." Diameter approximately 1.900 km. from mean, weighted H=16.3. | |
| 2007 RY19 | NEODyS | 1352 | 2024-2089 | 51 | 2.76e-05 | -3.56 | -3.88 | 0 | NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2007/09/14.354 to 2007/09/21.351." |
| JPL | 1351 | 2024-2106 | 71 | 6.5e-05 | -3.25 | -3.86 | 0 | JPL: "Analysis based on 37 observations spanning 6.9978 days (2007-Sep-14.35284 to 2007-Sep-21.350609)." Diameter approximately 0.110 km. from mean, weighted H=22.4. | |
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 an 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" for more about this.
Chronology on 22 September '07
Times are UTC for when the items were noted or added by Tracking News.
| 1352 | Noted that NEODyS has updated its 2007 RY19 risk assessment - see above Noted that NEODyS has updated its 2007 SJ risk assessment - see above Grabbed MPEC 2007-S40 - Daily Orbit Update - see above |
| 1351 | Noted that JPL has updated its 2007 RY19 risk assessment - see above Noted that JPL has updated its 2007 SJ risk assessment - see above |
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