This past Monday, the Institute for Astronomy at the University of Hawaii hailed the first Pan-STARRS' PHO discovery, noting that 2010 ST3 has one (highly preliminary) impact solution in the year 2098, and commenting that Pan-STARRS, which has been online for months, "is now the most sensitive system dedicated to discovering potentially dangerous asteroids." The discovery was reported nine days earlier in MPEC 2010-S20. Image credit: PS1C.
Contents on 1 October '10
- IAU Minor Planet Center
- NEOCP Activity -- 14 listings: 14 updated
- New MPECs -- four MPECs
- Observers -- 20 observing facilities
- Impact Risk Monitoring -- six objects
- Chronology
Resources:
- Consolidated Risk Tables - the CRT page
Of 340 risk-listed objects, 30 have had news in the last 31 days. Updated at 1554 UTC 1 Oct. - Earth's Busy Neighborhood Traffic Report
Two objects are known to be within ten LD of Earth today. Updated at 1742 UTC 1 Oct. - Ephemerides for risk-rated and nearby objects
- News image catalog
- 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 1 October '10
The MPC's NEO Confirmation Page has 14 listings: 14 updated
When last checked at 1856 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had fourteen updated listings. Of these, nine were "one nighters." So far The Tracking News has counted a total of nineteen 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 1 October '10
Minor Planet Electronic Circulars
As of last check at 1846 UTC, there have been four MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2010-T01 time-stamped "06:06 UT" - Daily Orbit Update - see below
- MPEC 2010-T02 time-stamped "13:33 UT" - 2010 SR16 - see below
- MPEC 2010-T03 time-stamped "13:47 UT" - 2010 SS16 - see below
- MPEC 2010-T04 time-stamped "14:09 UT" - 2010 ST16
MPEC 2010-T04 - "14:09 UT" - 2010 ST16
- K10S16T 2010 ST16 (small asteroid, Q=4.365 AU, H=23.6 ~65m) was discovered at 0915 UT on 30 Sept. by the Mt. Lemmon Survey (MLS), which observed it at Sept. 30.39-40p4, 30.45p4, and Oct. 1.23p2. The discovery was confirmed by the Spacewatch 1.8m telescope (Oct. 1.26-27p2) and Magdalena Ridge Obs. (MRO) (Oct. 1.27-30p4).
MPEC 2010-T03 - "13:47 UT" - 2010 SS16
- K10S16S 2010 SS16 (risk-listed, Q=4.407 AU, H=23.1 ~81m) was discovered at 0516 UT on 30 Sept. by MLS, which observed it at Sept. 30.22-24p4, 30.35-36p4, and Oct. 1.22p1. The discovery was confirmed by MRO (Sept. 30.30-33p4 & Oct. 1.24-26p4), Spacewatch 1.8m (Oct. 1.16p3), and Astronomical Research Obs. Westfield (Oct. 1.16-21p6).
MPEC 2010-T02 - "13:33 UT" - 2010 SR16
- K10S16R 2010 SR16 (small asteroid, H=24.1 ~51m) was discovered at 0506 UT on 30 Sept. by the Catalina Sky Survey (CSS), which observed it at Sept. 30.21-23p4, 30.29-31p4, and Oct. 1.25-26p4. The discovery was confirmed by MRO (Sept. 30.30-33p4 & Oct. 1.22-25p4), Spacewatch 1.8m (Oct. 1.17p2), and Sabino Canyon Obs. (Oct. 1.33-34p3).
<< DOU on 1 Oct. '10 >> MPEC 2010-T01 - "06:06 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K10S15H 2010 SH15 (small asteroid, arc=1 day, H=22.5 ~107m) from ARO Westfield (Sept. 30.22-26p3)
- K10S13K 2010 SK13 (small asteroid, Q=4.207 AU, arc=2 days, H=27.4 ~11m) from Great Shefford Obs. (Sept. 30.11-12p3), MRO (Sept. 30.16-19p4 & 30.33-37p3), ARO Westfield (Sept. 30.20-21p5), and Spacewatch 1.8m (Sept. 30.34-36p3)
- K10S13G 2010 SG13 (q=0.377 AU, arc=4 days, H=18.5 ~676m) from Spacewatch 1.8m (Oct. 1.11-12p3)
- Observations of recently (no longer) risk-listed objects
- K10RD0C 2010 RC130 (almost small, arc=16 days, H=21.9 ~141m) from Palmer Divide Obs. (Sept. 29.17-21p2, 29.27-31p2, 30.16-22p3 & 30.29p1), Castelmartini Obs. (Sept. 29.88-89p3), CSS (Sept. 30.21-23p4), Doc Greiner Research Obs. (DGRO) (Sept. 30.25-26p8), and Atlante Obs. (Sept. 30.89-90p3)
- K10R91A 2010 RA91 (small asteroid, arc=17 days, H=23.3 ~74m) from LINEAR (Sept. 30.16-21p4) and Kachina Obs. (Sept. 30.18-21p3)
- K10R43H 2010 RH43 (small asteroid, arc=26 days, H=26.2 ~19m) from Spacewatch 1.8m (Sept. 30.45p3)
- Observations of small asteroids (H>22.0)
- K10S15K 2010 SK15 (arc=1 day, H=22.4 ~112m) from LINEAR (Sept. 30.29-34p5)
- K10S11X 2010 SX11 (arc=12 days, H=24.8 ~37m) from DGRO (Sept. 30.27p3) and MLS (Sept. 30.32-33p3)
- K10S00J 2010 SJ (arc=14 days, H=23.8 ~59m) from DGRO (Sept. 30.26p9)
- K10RD0B 2010 RB130 (arc=15 days, H=24.1 ~51m) from CSS (Sept. 30.33-35p4 & 30.47-49p3)
- K10R80R 2010 RR80 (arc=20 days, H=22.4 ~112m) from Spacewatch 1.8m (Oct. 1.18-19p3)
- K10R64J 2010 RJ64 (arc=20 days, H=24.0 ~54m) from MLS (Sept. 30.28-30p4 & 30.35-38p8)
- K10R03S 2010 RS3 (arc=28 days, H=22.6 ~102m) from MLS (Sept. 30.22-23p3)
- K10R00F 2010 RF (arc=29 days, H=23.0 ~85m) from Spacewatch 1.8m (Sept. 30.38-39p3 at V=21.5-22.3)
- K10P66S 2010 PS66 (arc=46 days, H=25.1 ~32m) from Spacewatch 1.8m (Sept. 30.42-44p3 at V=21.6-22.2)
- K10P57D 2010 PD57 (arc=51 days, H=22.6 ~102m) from Chabot Obs. (Sept. 30.22-25p3)
- K10L14H 2010 LH14 (arc=120 days, H=22.2 ~123m) from Spacewatch 1.8m (Sept. 30.47-48p3)
- Observations of almost-small asteroids (21.7<H<=22.0)
- K10S03R 2010 SR3 (arc=14 days, H=21.8 ~148m) from Spacewatch 1.8m (Sept. 30.50p3)
- Observations of other objects
- K10S13L 2010 SL13 (arc=11 days, H=19.3 ~467m) from Spacewatch 1.8m (Sept. 30.33p3)
- K10S13J 2010 SJ13 from LINEAR (Sept. 29.09-15p18)
- K10S13D 2010 SD13 (Q=4.317 AU, arc=4 days, H=18.8 ~589m) from LINEAR (Sept. 30.09-13p3), the Siding Spring Survey (SSS) (Sept. 30.45p3), and DGRO (Oct. 1.03-04p5)
- K10S12A 2010 SA12 (arc=12 days, H=21.0 ~214m) from Desert Moon Obs. (Sept. 30.41-44p3)
- K10S03V 2010 SV3 (arc=13 days, H=20.6 ~257m) from Desert Moon Obs. (Sept. 30.18-22p3)
- K10RD7G 2010 RG137 (arc=27 days, H=21.2 ~195m) from Desert Moon Obs. (Sept. 30.12-13p3)
- K10R80P 2010 RP80 (Q=4.720 AU, arc=20 days, H=20.7 ~245m) from CSS (Sept. 30.29-32p4) and DGRO (Sept. 30.30-31p4)
- K10R80N 2010 RN80 (arc=21 days, H=20.1 ~323m) from Castelmartini Obs. (Sept. 29.82-83p3), DGRO (Sept. 30.24p6), and Atlante Obs. (Sept. 30.84-86p3)
- K10R64K 2010 RK64 (arc=20 days, H=20.8 ~234m) from DGRO (Oct. 1.04-05p3)
- K10R43K 2010 RK43 (arc=24 days, H=20.6 ~257m) from CSS (Sept. 30.26-28p3) and DGRO (Sept. 30.29p3)
- K10R12C 2010 RC12 (arc=27 days, H=21.7 ~155m) from Chabot Obs. (Sept. 30.27-30p3)
- K10P10M 2010 PM10 (arc=55 days, H=19.7 ~389m) from DGRO (Sept. 30.32-33p5) and CSS (Sept. 30.36-38p4)
- K10P02P 2010 PP2 (arc=58 days, H=21.1 ~204m) from Chabot Obs. (Sept. 30.19-21p3)
- K10M87R 2010 MR87 (arc=100 days, H=19.5 ~426m) from DGRO (Sept. 30.30p9)
- K10M01F 2010 MF1 (arc=105 days, H=19.7 ~389m) from DGRO (Oct. 1.06-07p5)
- K10L63Y 2010 LY63 (arc=4 opp, H=17.8 ~933m) from Castelmartini Obs. (Sept. 29.85-86p3), DGRO (Sept. 30.25p10 & Oct. 1.09p10), and Atlante Obs. (Sept. 30.87p1 & 30.91-92p2)
- K07VI9G 2007 VG189 (arc=2 opp, H=19.5 ~426m) from Castelmartini Obs. (Sept. 29.83-84p3)
- K07R17U 2007 RU17 (q=0.351 AU, arc=2 opp, H=18.1 ~812m) from La Sagra Obs. (Sept. 30.04-07p3) and CSS (Sept. 30.37-45p8)
- K04F11G 2004 FG11 (arc=3 opp, H=21.0 ~214m) from WISE (April 9.78p2)
- K03N04O 2003 NO4 (arc=4 opp, H=18.1 ~812m) from the Spacewatch 0.9m telescope (Sept. 30.42-46p3)
- K02F05Q 2002 FQ5 (arc=3 opp, H=20.5 ~269m) from WISE (April 10.51p1 & 10.84p1)
- K00T01J 2000 TJ1 (i=39.5°, arc=3 opp, H=19.3 ~467m) from DGRO (Sept. 30.27-28p9 & Oct. 1.15p9) and Atlante Obs. (Sept. 30.93-94p3)
- K00EA6Y 2000 EY106 (i=38.2°, arc=2 opp, H=19.1 ~513m) from Castelmartini Obs. (Sept. 29.93p3)
- P1346 251346 2007 SJ from CSS (Sept. 30.25-28p4)
- O9595 249595 1997 GH28 from La Sagra Obs. (Sept. 29.92-95p6) and CSS (Sept. 30.29-31p4)
- N7442 237442 1999 TA10 from Castelmartini Obs. (Sept. 29.81p3)
- G8378 168378 1997 ET30 from CSS (Sept. 30.39-41p4)
- G1998 161998 1988 PA from Desert Moon Obs. (Sept. 30.10p2) and LINEAR (Sept. 30.16-21p4)
- E4900 144900 2004 VG64 from Spacewatch 0.9m (Sept. 30.41-45p3)
- E3381 143381 2003 BC21 from Castelmartini Obs. (Sept. 29.86p3)
- 89355 89355 2001 VS78 from LINEAR (Sept. 30.45-48p3)
- 66146 66146 1998 TU3 from LINEAR (Sept. 30.43-49p5)
- 66008 66008 1998 QH2 from LINEAR (Sept. 30.22-28p5)
- 65679 65679 1989 UQ from La Sagra Obs. (Sept. 30.10-12p3)
- 29075 29075 1950 DA from La Sagra Obs. (Sept. 29.85-87p3)
- 25916 25916 2001 CP44 from LINEAR (Sept. 30.43-49p5)
- 19764 19764 2000 NF5 from La Sagra Obs. (Sept. 29.84-86p3)
- 17182 17182 1999 VU from CSS (Sept. 30.21-24p4)
- 06239 6239 Minos (1989 QF) from Pear Tree Obs. (Sept. 29.09-12p3)
- 05143 5143 Heracles (1991 VL) from CSS (Sept. 30.26-28p4)
- 04486 4486 Mithra (1987 SB) from La Sagra Obs. (Sept. 30.03-05p3)
- 02212 2212 Hephaistos (1978 SB) from La Sagra Obs. (Sept. 30.06-09p3)
Observers on 1 October '10
A total of 20 observing facilities appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| H21 | Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2010-T01 & 2010-T03 -- 2010 SS16, 2010 SK13, 2010 SH15 |
| J51 | Atlante Obs. in the Canary Islands, 4 in MPEC 2010-T01 -- 2010 RN80, 2010 RC130, 2010 LY63, 2000 TJ1 |
| 160 | Castelmartini Obs. in Italy, 7 in MPEC 2010-T01 -- 2010 RN80, 2010 RC130, 2010 LY63, 2007 VG189, 2000 EY106, 237442, 143381 |
| 703 | Catalina Sky Survey (CSS) in Arizona, 12 in MPECs 2010-T01 & 2010-T02 -- 2010 SR16, 2010 RP80, 2010 RK43, 2010 RC130, 2010 RB130, 2010 PM10, 2007 RU17, 251346, 249595, 17182, 168378, 5143 |
| G58 | Chabot Obs. in northern California, 3 in MPEC 2010-T01 -- 2010 RC12, 2010 PP2, 2010 PD57 |
| 448 | Desert Moon Obs. in New Mexico, 4 in MPEC 2010-T01 -- 2010 SV3, 2010 SA12, 2010 RG137, 161998 |
| H26 | Doc Greiner Research Obs. (DGRO) in Wisconsin, 13 in MPEC 2010-T01 -- 2010 SX11, 2010 SJ, 2010 SD13, 2010 RP80, 2010 RN80, 2010 RK64, 2010 RK43, 2010 RC130, 2010 PM10, 2010 MR87, 2010 MF1, 2010 LY63, 2000 TJ1 |
| J95 | Great Shefford Obs. in England, 1 in MPEC 2010-T01 -- 2010 SK13 |
| G89 | Kachina Obs. in Arizona, 1 in MPEC 2010-T01 -- 2010 RA91 |
| 704 | LINEAR in New Mexico, 9 in MPEC 2010-T01 -- 2010 SK15, 2010 SJ13, 2010 SD13, 2010 RA91, 89355, 66146, 66008, 25916, 161998 |
| J75 | La Sagra Obs. in Spain, 7 in MPEC 2010-T01 -- 2007 RU17, 65679, 29075, 249595, 19764, 4486, 2212 |
| H01 | Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2010-T01, 2010-T02, 2010-T03 & 2010-T04 -- 2010 ST16, 2010 SS16, 2010 SR16, 2010 SK13 |
| G96 | Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2010-T01, 2010-T03 & 2010-T04 -- 2010 SX11, 2010 ST16, 2010 SS16, 2010 RS3, 2010 RJ64 |
| 716 | Palmer Divide Obs. in Colorado, 1 in MPEC 2010-T01 -- 2010 RC130 |
| H23 | Pear Tree Obs. in Florida, 1 in MPEC 2010-T01 -- 6239 |
| 854 | Sabino Canyon Obs. in Arizona, 1 in MPEC 2010-T02 -- 2010 SR16 |
| E12 | Siding Spring Survey in New South Wales, 1 in MPEC 2010-T01 -- 2010 SD13 |
| 691 | Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2010-T01 -- 2003 NO4, 144900 |
| 291 | Spacewatch 1.8m telescope in Arizona, 12 in MPECs 2010-T01, 2010-T02, 2010-T03 & 2010-T04 -- 2010 ST16, 2010 SS16, 2010 SR3, 2010 SR16, 2010 SL13, 2010 SK13, 2010 SG13, 2010 RR80, 2010 RH43, 2010 RF, 2010 PS66, 2010 LH14 |
| C51 | WISE in Earth polar orbit, 2 in MPEC 2010-T01 -- 2004 FG11, 2002 FQ5 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 1 October '10
| 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 |
| 2010 SS16 | JPL Sentry | 1554 | 2058-2085 | 7 | 8.9e-09 | -7.26 | -7.42 | 0 | JPL: "Analysis based on 26 observations spanning 1.0452 days (2010-Sep-30.2195 to 2010-Oct-01.26472)." Diameter approximately 0.081 km. from mean, weighted H=23.1. |
| 2010 SJ15 | NEODyS | 1500 | 2014-2090 | 88 | 4.9e-09 | -5.78 | -6.18 | 0 | NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2010/09/29.301 to 2010/09/30.366." |
| 2010 SH15 | JPL Sentry | 1500 | 2023-2107 | 65 | 1.4e-07 | -5.54 | -6.07 | 0 | JPL: "Analysis based on 14 observations spanning .98587 days (2010-Sep-29.26958 to 2010-Sep-30.25545)." Diameter approximately 0.110 km. from mean, weighted H=22.4. |
| NEODyS | 1500 | 2032-2081 | 4 | 2.78e-08 | -6.22 | -6.30 | 0 | NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2010/09/29.270 to 2010/09/30.256." | |
| 2010 SF15 | NEODyS | 1500 | 2041-2081 | 3 | 2.37e-10 | -8.03 | -8.16 | 0 | NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2010/09/29.189 to 2010/09/30.197." |
| 2010 SK13 | JPL Sentry | 1500 | R E M O V E D | JPL: Risk listing removed at 0951 UTC. | |||||
| NEODyS | 1500 | R E M O V E D | - | ||||||
| 2010 SG13 | JPL Sentry | 1500 | 2020-2100 | 10 | 3.6e-09 | -4.30 | -4.68 | 0 | JPL: "Analysis based on 17 observations spanning 4.0170 days (2010-Sep-27.10646 to 2010-Oct-01.12346)." Diameter approximately 0.880 km. from mean, weighted H=17.9. |
| NEODyS | 1500 | 2027-2065 | 16 | 8.81e-10 | -5.05 | -5.92 | 0 | NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2010/09/27.107 to 2010/10/01.124." | |
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 1 October '10
Times are UTC for when items were noted or added by The Tracking News.
| 1554 | Noted that JPL Sentry has posted 2010 SS16 as an impact risk - see above |
| 1500 | Noted that NEODyS has posted 2010 SF15 as an impact risk - see above Noted that JPL Sentry has updated its 2010 SG13 risk assessment - see above Noted that NEODyS has updated its 2010 SG13 risk assessment - see above Noted that JPL Sentry has updated its 2010 SH15 risk assessment - see above Noted that NEODyS has posted 2010 SH15 as an impact risk - see above Noted that NEODyS has posted 2010 SJ15 as an impact risk - see above Noted that JPL Sentry has removed 2010 SK13 as an impact risk - see above Noted that NEODyS has removed 2010 SK13 as an impact risk - see above Grabbed MPEC 2010-T01 - Daily Orbit Update - see above Grabbed MPEC 2010-T02 - 2010 SR16 - see above Grabbed MPEC 2010-T03 - 2010 SS16 - see above Grabbed MPEC 2010-T04 - 2010 ST16 - see above |
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