Sky & Telescope and NASA JPL are helping backyard observers to spot the presently bright tenth largest Main Belt asteroid, now visible with binoculars (in good seeing conditions) in Pisces not too far from Jupiter. This adaptive optics image of 3 Juno came from Sallie Baliunas et al. in 2003 using the 2.54-meter Hooker Telescope on Mt. Wilson.
Contents on 20 September '09
- IAU Minor Planet Center
- NEOCP Activity -- nine listings: 4 new, 5 updated
- New MPECs -- five MPECs
- Observers -- 21 observing facilities
- Impact Risk Monitoring -- ten objects
- Chronology
Resources:
- Consolidated Risk Tables - the CRT page
- Earth's Busy Neighborhood Traffic Report
- Ephemerides for risk-rated and nearby objects
- News image catalog - new 13-14 Aug. 2009
- 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 20 September '09
The MPC's NEO Confirmation Page has 9 listings: 4 new, 5 updated
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and five updated listings. Of these, seven were "one nighters." The Tracking News counted a total of fourteen listings on the NEOCP at some point on this day.
New MPECs on 20 September '09
Minor Planet Electronic Circulars
There were five MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2009-S55 time-stamped "06:08 UT" - Daily Orbit Update - see below
- MPEC 2009-S56 time-stamped "14:39 UT" - 2009 SB15 - see below
- MPEC 2009-S57 time-stamped "14:42 UT" - 2009 SC15 - see below
- MPEC 2009-S58 time-stamped "14:45 UT" - 2009 SD15 - see below
- MPEC 2009-S59 time-stamped "23:56 UT" - 2009 MS9
MPEC 2009-S59 - "23:56 UT" - 2009 MS9
- K09M09S 2009 MS9 was discovered at 1130 UT on 25 June from Mauna Kea, where it was observed at June 25.48p1, 25.52p1, 25.57p1, July 19.36p1, 20.39p1, 21.34p1, 21.38p1, 21.42p1, Aug. 19.34-38p3, 21.27p1, 21.34p1, 21.44p1, and Sept. 13.24p4. The discovery was confirmed by Mt. Palomar (July 24.20-25p2, 24.30p1, 25.26p1, 25.33p1, 25.39p1, 25.49p1, Aug. 18.18p1, 18.22p1, 18.28p1, 18.34p1, 18.39p1, 19.15p1, 19.21p1, 19.28p1 & 19.37-42p2).
MPEC 2009-S58 - "14:45 UT" - 2009 SD15
- K09S15D 2009 SD15 (risk-listed) was discovered at 0548 UT on 19 Sept. by the Mt. Lemmon Survey (MLS), which observed it at Sept. 19.24-25p4, 19.33-34p4, and 20.38p4.
MPEC 2009-S57 - "14:42 UT" - 2009 SC15
- K09S15C 2009 SC15 (risk-listed) was discovered at 0544 UT on 19 Sept. by MLS, which observed it at Sept. 19.24-31p8 and 20.26-28p4. The discovery was confirmed by the Spacewatch 1.8m telescope (Sept. 20.14-15p3) and Sandlot Obs. (Sept. 20.31-35p3).
MPEC 2009-S56 - "14:39 UT" - 2009 SB15
- K09S15B 2009 SB15 (risk-listed) was discovered at 0930 UT on 18 Sept. by MLS, which observed it at Sept. 18.40-45p8 at V=21.3-22.1, 19.34p3 at V=21.2-7, and 20.47p4 at V=21.0-7. The discovery was confirmed by Astronomical Research Obs. (ARO) (Sept. 19.26-28p3).
<< DOU on 20 Sept. '09 >> MPEC 2009-S55 - "06:08 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K09S02K 2009 SK2 (i=37.1°, arc=1 day, H=18.6 ~645m) from ARO (Sept. 19.31-32p3) and Sandlot Obs. (Sept. 19.37-39p3)
- K09S02H 2009 SH2 (small asteroid, arc=1 day, H=24.4 ~45m) from Jim Young via Table Mtn. Obs. (Sept. 19.42-45p4)
- K09S02G 2009 SG2 (arc=1 day, H=20.0 ~339m) from Young/Table Mtn. (Sept. 19.38-41p4)
- K09S01X 2009 SX1 (arc=1 day, H=18.7 ~616m) from ARO (Sept. 19.31-32p3)
- K09S01W 2009 SW1 (small asteroid, arc=1 day, H=23.6 ~65m) from Sandlot Obs. (Sept. 19.42-44p3)
- K09S00B 2009 SB (q=0.367 AU, Q=4.961 AU, arc=3 days, H=20.2 ~309m) from Spacewatch 1.8m (Sept. 19.26-27p3)
- K09R03Z 2009 RZ3 (i=53.0°, arc=5 days, H=18.7 ~616m) from ARO (Sept. 19.09-10p3) and Rio Cuarto Obs. (Sept. 19.09-10p4)
- Observations of recently (no longer) risk-listed objects
- K09S00K 2009 SK (small asteroid, Q=4.209 AU, arc=2 days, H=25.1 ~32m) from Spacewatch 1.8m (Sept. 19.32-33p3)
- K09S00D 2009 SD (small asteroid, arc=3 days, H=25.4 ~28m) from Spacewatch 1.8m (Sept. 19.23-24p3)
- K09Q08L 2009 QL8 (arc=30 days, H=19.4 ~446m) from El Condor Obs. (Sept. 19.19-21p3)
- Observations of small asteroids (H>22.0)
- K09S01J 2009 SJ1 (arc=2 days, H=26.0 ~21m) from Great Shefford Obs. (Sept. 20.04-05p3)
- K09R01T 2009 RT1 (arc=8 days, H=23.6 ~65m) from Rio Cuarto Obs. (Sept. 19.19-20p2)
- K09R00H 2009 RH (arc=9 days, H=23.9 ~56m) from Rio Cuarto Obs. (Sept. 19.06-07p3)
- K09Q35A 2009 QA35 (Q=4.132 AU, arc=22 days, H=22.3 ~117m) from Spacewatch 1.8m (Sept. 19.42-44p3)
- K09Q34E 2009 QE34 (arc=24 days, H=23.6 ~65m) from Sandlot Obs. (Sept. 19.41p2)
- Observations of almost-small asteroids (21.7<H<=22.0)
- K09R01V 2009 RV1 (arc=7 days, H=22.0 ~135m) from Spacewatch 1.8m (Sept. 19.45-46p3)
- K09Q36C 2009 QC36 (arc=20 days, H=22.0 ~135m) from Walnut Creek Obs. (Sept. 19.27-29p3)
- Observations of other objects
- K09S02F 2009 SF2 (arc=1 day, H=20.6 ~257m) from ARO (Sept. 19.29-30p3)
- K09S00Q 2009 SQ (q=0.367 AU, Q=5.189 AU, arc=2 days, H=19.0 ~537m) from ARO (Sept. 19.07-08p3), Doc Greiner Research Obs. (DGRO) (Sept. 19.10p3), and Walnut Creek Obs. (Sept. 19.20-22p3)
- K09S00N 2009 SN (arc=3 days, H=21.6 ~162m) from Great Shefford Obs. (Sept. 19.87-88p4)
- K09S00G 2009 SG (i=39.5°, arc=3 days, H=19.7 ~389m) from the Catalina Sky Survey (CSS) (Sept. 19.30-33p4)
- K09S00C 2009 SC (arc=3 days, H=19.5 ~426m) from Spacewatch 1.8m (Sept. 19.39-40p3)
- K09R01D 2009 RD1 (arc=7 days, H=20.7 ~245m) from ARO (Sept. 19.09-10p4)
- K09R00M 2009 RM (Q=4.394 AU, arc=9 days, H=18.4 ~708m) from Rio Cuarto Obs. (Sept. 19.01-02p3)
- K09Q02K 2009 QK2 (Q=4.950 AU, arc=33 days, H=17.9 ~891m) from Guidestar Obs. (Sept. 19.80-82p3) and Alter Satzberg Obs. (Sept. 19.95-96p3)
- K09Q00O 2009 QO (arc=88 days, H=20.0 ~339m) from Walnut Creek Obs. (Sept. 19.15-16p3)
- K09N00H 2009 NH (arc=67 days, H=18.8 ~589m) from the Siding Spring Survey (SSS) (Sept. 16.61p1)
- K09K03C 2009 KC3 from Velikie Luki Obs. (Sept. 18.84p2)
- K08E05E 2008 EE5 (i=44.8°, arc=2 opp, H=19.7 ~389m) from Betelgeuse Station (Feb. 12.87p1)
- K06SD4P 2006 SP134 (arc=4 opp, H=16.9 ~1.41 km) from Spacewatch 1.8m (Sept. 19.37-39p3)
- K05R06Q 2005 RQ6 (arc=2 opp, H=18.8 ~589m) from SSS (Sept. 16.64p1)
- K04R09K 2004 RK9 (arc=2 opp, H=21.2 ~195m) from Spacewatch 1.8m (Sept. 19.20-21p3) and MLS (Sept. 19.24-25p4 & 19.35-37p8)
- K04J01R 2004 JR1 (Q=4.602 AU, arc=3 opp, H=17.6 ~1.02 km) from SSS (Sept. 19.72-75p3)
- K02T30N 2002 TN30 (arc=4 opp, H=16.8 ~1.48 km) from CSS (Sept. 19.30-33p4)
- K01T44X 2001 TX44 (arc=4 opp, H=19.1 ~513m) from SSS (Sept. 18.43p1)
- K01H04A 2001 HA4 (Q=4.819 AU, arc=2 opp, H=17.5 ~1.07 km) from Rio Cuarto Obs. (Sept. 19.14-15p3)
- K00S10O 2000 SO10 (i=37.0°, arc=5 opp, H=17.5 ~1.07 km) from Inastars Obs. (Sept. 19.98-99p4)
- L8017 218017 2001 XV266 from CSS (Sept. 19.42-44p4)
- G3697 163697 2003 EF54 from Inastars Obs. (Sept. 19.92-93p4)
- G2168 162168 1999 GT6 from MLS (Sept. 19.46-49p4)
- F9402 159402 1999 AP10 from CSS (Sept. 19.25-27p4) and Sandlot Obs. (Sept. 20.15-16p3)
- E3487 143487 2003 CR20 from CSS (Sept. 19.38-40p3)
- E3409 143409 2003 BQ46 from MLS (Sept. 19.29-32p4)
- 38091 38091 1999 JT3 from CSS (Sept. 19.38-40p4)
- 30825 30825 1990 TG1 from the Spacewatch 0.9m telescope (Sept. 19.28-32p3)
- 20826 20826 2000 UV13 from CSS (Sept. 19.24-27p4)
- 12711 12711 Tukmit (1991 BB) from Betelgeuse Sta. (Feb. 12.89p1)
- 08035 8035 1992 TB from Inastars Obs. (Sept. 19.91p4)
- 03552 3552 Don Quixote (1983 SA) from H. Sato via RAS Obs. Moorook (Sept. 19.47p3)
Observers on 20 September '09
A total of 21 observing facilities appeared in this day's MPECs.
| Code | Observer / observatory |
|---|---|
| B03 | Alter Satzberg Obs. in Austria, 1 in MPEC 2009-S55 -- 2009 QK2 |
| H55 | Astronomical Research Obs. (ARO) in Illinois, 7 in MPECs 2009-S55 & 2009-S56 -- 2009 SX1, 2009 SQ, 2009 SK2, 2009 SF2, 2009 SB15, 2009 RZ3, 2009 RD1 |
| B75 | Betelgeuse Station in Italy, 2 in MPEC 2009-S55 -- 2008 EE5, 12711 |
| 703 | Catalina Sky Survey (CSS) in Arizona, 7 in MPEC 2009-S55 -- 2009 SG, 2002 TN30, 38091, 218017, 20826, 159402, 143487 |
| H26 | Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2009-S55 -- 2009 SQ |
| I21 | El Condor Obs. in Argentina, 1 in MPEC 2009-S55 -- 2009 QL8 |
| J95 | Great Shefford Obs. in England, 2 in MPEC 2009-S55 -- 2009 SN, 2009 SJ1 |
| A17 | Guidestar Obs. in Germany, 1 in MPEC 2009-S55 -- 2009 QK2 |
| B15 | Inastars Obs. in Germany, 3 in MPEC 2009-S55 -- 2000 SO10, 163697, 8035 |
| 568 | Mauna Kea in Hawaii, 1 in MPEC 2009-S59 -- 2009 MS9 |
| G96 | Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2009-S55, 2009-S56, 2009-S57 & 2009-S58 -- 2009 SD15, 2009 SC15, 2009 SB15, 2004 RK9, 162168, 143409 |
| 675 | Mt. Palomar in southern California, 1 in MPEC 2009-S59 -- 2009 MS9 |
| D90| | H. Sato in Japan via RAS Obs. Moorook in South Australia, 1 in MPEC 2009-S55 -- 3552 |
| I20 | Rio Cuarto Obs. in Argentina, 5 in MPEC 2009-S55 -- 2009 RZ3, 2009 RT1, 2009 RM, 2009 RH, 2001 HA4 |
| H36 | Sandlot Obs. in Kansas, 5 in MPECs 2009-S55 & 2009-S57 -- 2009 SW1, 2009 SK2, 2009 SC15, 2009 QE34, 159402 |
| E12 | Siding Spring Survey (SSS) in New South Wales, 4 in MPEC 2009-S55 -- 2009 NH, 2005 RQ6, 2004 JR1, 2001 TX44 |
| 691 | Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2009-S55 -- 30825 |
| 291 | Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2009-S55 & 2009-S57 -- 2009 SK, 2009 SD, 2009 SC15, 2009 SC, 2009 SB, 2009 RV1, 2009 QA35, 2006 SP134, 2004 RK9 |
| 6735 | Jim Young via Table Mtn. Obs. in southern California, 2 in MPEC 2009-S55 -- 2009 SH2, 2009 SG2 |
| C00 | Velikie Luki Obs. in Russia, 1 in MPEC 2009-S55 -- 2009 KC3 |
| G56 | Walnut Creek Obs. in northern California, 3 in MPEC 2009-S55 -- 2009 SQ, 2009 QO, 2009 QC36 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 20 September '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 SD15 | JPL Sentry | 1659 | 2066-2105 | 5 | 1.0e-06 | -7.03 | -7.13 | 0 | JPL: "Analysis based on 12 observations spanning 1.1430 days (2009-Sep-19.24181 to 2009-Sep-20.38483)." Diameter approximately 0.014 km. from mean, weighted H=26.9. |
| 2009 SC15 | JPL Sentry | 1801 | 2013-2107 | 65 | 3.7e-07 | -4.28 | -4.35 | 0 | JPL: "Analysis based on 18 observations spanning 1.1093 days (2009-Sep-19.2394 to 2009-Sep-20.34871)." Diameter approximately 0.153 km. from mean, weighted H=21.7. |
| 2009 SB15 | JPL Sentry | 1659 | 2016 | 1 | 1.7e-10 | -7.72 | -7.72 | 0 | JPL: "Analysis based on 18 observations spanning 2.0748 days (2009-Sep-18.39595 to 2009-Sep-20.47073)." Diameter approximately 0.130 km. from mean, weighted H=22.1. |
| 2009 SK2 | JPL Sentry | 1443 | R E M O V E D | JPL: Risk listing removed at 1027 UTC. | |||||
| 2009 SH2 | JPL Sentry | 1443 | 2041-2082 | 76 | 2.3e-05 | -4.61 | -5.17 | 0 | JPL: "Analysis based on 13 observations spanning .68945 days (2009-Sep-18.76541 to 2009-Sep-19.45486)." Diameter approximately 0.045 km. from mean, weighted H=24.4. |
| NEODyS | 1443 | 2035-2089 | 39 | 1.9e-05 | -4.69 | -5.25 | 0 | NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2009/09/18.766 to 2009/09/19.456." | |
| 2009 SG2 | JPL Sentry | 1443 | R E M O V E D | JPL: Risk listing removed at 1030 UTC. | |||||
| 2009 SX1 | NEODyS | 1443 | R E M O V E D | - | |||||
| JPL Sentry | 1443 | R E M O V E D | JPL: Risk listing removed at 1041 UTC. | ||||||
| 2009 SW1 | NEODyS | 1443 | R E M O V E D | - | |||||
| JPL Sentry | 1443 | R E M O V E D | JPL: Risk listing removed at 0950 UTC. | ||||||
| 2009 SB | JPL Sentry | 1443 | 2033-2108 | 12 | 8.9e-08 | -4.47 | -4.99 | 0 | JPL: "Analysis based on 24 observations spanning 3.0207 days (2009-Sep-16.24433 to 2009-Sep-19.26508)." Diameter approximately 0.290 km. from mean, weighted H=20.3. |
| NEODyS | 1443 | 2022-2068 | 11 | 2.27e-08 | -4.75 | -5.00 | 0 | NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2009/09/16.245 to 2009/09/19.266." | |
| 2009 RZ3 | JPL Sentry | 1443 | 2025-2108 | 28 | 3.8e-07 | -2.96 | -3.65 | 0 | JPL: "Analysis based on 40 observations spanning 4.9625 days (2009-Sep-14.20535 to 2009-Sep-19.1679)." Diameter approximately 0.631 km. from mean, weighted H=18.7. |
| NEODyS | 1443 | 2025-2090 | 22 | 1.31e-07 | -3.28 | -3.80 | 0 | NEODyS: "Based on 40 optical observations (of which 0 are rejected as outliers) from 2009/09/14.206 to 2009/09/19.169." | |
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 20 September '09
Times are UTC for when items were noted or added by The Tracking News.
| 0017 9/21 | Grabbed MPEC 2009-S59 - 2009 MS9 - see above |
| 1801 | Noted that JPL Sentry has posted 2009 SC15 as an impact risk - see above |
| 1659 | Noted that JPL Sentry has posted 2009 SB15 as an impact risk - see above Noted that JPL Sentry has posted 2009 SD15 as an impact risk - see above |
| 1538 | Grabbed MPEC 2009-S57 - 2009 SC15 - see above Grabbed MPEC 2009-S58 - 2009 SD15 - see above |
| 1443 | Noted that JPL Sentry has updated its 2009 RZ3 risk assessment - see above Noted that NEODyS has updated its 2009 RZ3 risk assessment - see above Noted that JPL Sentry has updated its 2009 SB risk assessment - see above Noted that NEODyS has updated its 2009 SB risk assessment - see above Noted that JPL Sentry has removed 2009 SG2 as an impact risk - see above Noted that JPL Sentry has updated its 2009 SH2 risk assessment - see above Noted that NEODyS has posted 2009 SH2 as an impact risk - see above Noted that JPL Sentry has removed 2009 SK2 as an impact risk - see above Noted that JPL Sentry has removed 2009 SW1 as an impact risk - see above Noted that NEODyS has removed 2009 SW1 as an impact risk - see above Noted that JPL Sentry has removed 2009 SX1 as an impact risk - see above Noted that NEODyS has removed 2009 SX1 as an impact risk - see above Grabbed MPEC 2009-S55 - Daily Orbit Update - see above Grabbed MPEC 2009-S56 - 2009 SB15 - see above |
Publisher information, privacy statement, and disclaimer.
This page is © Copyright 2009 Columbine, Inc. - All Rights Reserved
Any mentioned trademarks are the property of their respective owners.
Various tabular formats and data used on this page are acknowledged as belonging to JPL, MPC, NEODyS, and/or others.
Do NOT copy, mirror, or embed this page, but you are welcome to link to it, and you may embed the RSS news feed. All information here is subject to very frequent change during the day of news compilation. Individuals may make copies for their own private, non-commercial use. Please report broken links or other problems with this page to <webmaster@hohmanntransfer.com> (HTML 4.01 validation).
Important news updates are flagged by A/CC's RSS news feed (link).