Contents on 7 October '12
- Traffic Report -- two objects
- IAU Minor Planet Center
- Observers -- sixteen observers
- Impact Risk Monitoring -- one object
Asteroid/Comet Connection (A/CC) Resources:
Note: The A/CC news pages will update only occasionally through early October 12th UTC.
- Consolidated Risk Tables - the CRT page (archive)
- Ephemerides for risk-rated & nearby objects + potential mission destinations
- News image catalog
- News old archive & Small Objects Archive
- Object Links - mainly for radar targets & close passers - updated 14 Sept.
- Observing Campaigns
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.
Traffic Report on 7 October '12
Two objects reported inside ten LD
Two small asteroids are reported to be traveling inside ten lunar distances (LD) of Earth today. Risk-listed intruder 2012 TV passes through the Earth-Moon system during the day, moving in from 2.45 and out to 1.55 LD, reaching 0.66 LD at 1504 UT. And newly announced intruder 2012 TC4 is inbound from 7.75 to 6.28 LD.
Coming toward Earth next, 2010 JK1 arrives inside ten LD on November 22nd.
This report was updated at 1715 UTC with new discovery 2012 TC4 (MPEC). Today's first traffic report was generated at 1418 UTC with follow-up in today's DOU MPEC for 2012 TV and departed 2012 SR56, with distances updated at 1510 UTC.
Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Object distances are interpreted by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.
NEOCP Activity on 7 October '12
The MPC's NEO Confirmation Page has 135 listings
When last checked at 2322 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 135 objects listed. Of these, 101 were "one nighters." The Tracking News counted a total of 146 listings on the NEOCP on this day.
New MPECs on 7 October '12
Minor Planet Electronic Circulars
There were two MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2012-T17 time-stamped "06:03 UT" - Daily Orbit Update - see below
- MPEC 2012-T18 time-stamped "14:42 UT" - 2012 TC4
MPEC 2012-T18 - "14:42 UT" - 2012 TC4
- K12T04C 2012 TC4 (Earth MOID=0.0 LD, i=1.4°, H=26.6 ~16m, close passer) from Pan-STARRS 1 (PS1) (Oct. 4.47-48p2), the Catalina Sky Survey (CSS) (Oct. 6.17-20p3), Great Shefford Obs. (Oct. 6.83p3), South Obs. (Oct. 6.91-92p3), Sandlot Obs. (Oct. 7.19-22p3), McCarthy Obs. (Oct. 7.22-23p2), and Moriyama Obs. (Oct. 7.50-52p3)
- Observations of risk-listed objects
- K12T00V 2012 TV (small asteroid, arc=2 days, H=25.2 ~31m, close passer) from Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) (Oct. 6.14p6), Bisei Spaceguard Center (Oct. 6.66-69p38), and Slooh.com Canary Islands Obs. (Oct. 6.91-93p2)
- Observations of close-passing objects
- K12S56R 2012 SR56 (arc=11 days, H=24.3 ~47m) from Astronomical Research Obs. Westfield (Oct. 6.32-34p4)
- Observations of small asteroids (H>22.0)
- K12S50K 2012 SK50 (arc=13 days, H=24.8 ~37m) from ARO Westfield (Oct. 6.34-35p3) and PS1 (Oct. 6.47-50p4)
- Observations of other asteroidal objects
- K12T00U 2012 TU (arc=2 days, H=20.7 ~245m) from McDonald Obs. (Oct. 6.24-25p9)
- K12T00S 2012 TS (arc=2 days, H=20.7 ~245m) from McDonald Obs. (Oct. 6.13-14p3) and DGRO-RH (Oct. 6.14-15p4)
- K12S59A 2012 SA59 (arc=9 days, H=18.9 ~562m) from ARO Westfield (Oct. 6.31-32p5)
- K12S56Q 2012 SQ56 (Q=4.678 AU, arc=14 days, H=17.7 ~977m) from ARO Westfield (Oct. 6.41-42p3)
- K12S08K 2012 SK8 (arc=20 days, H=20.4 ~282m) from ARO Westfield (Oct. 6.37-39p4)
- K12R16X 2012 RX16 (arc=21 days, H=21.1 ~204m) from ARO Westfield (Oct. 6.39-40p4) and PS1 (Oct. 6.48-51p4)
- K12R16V 2012 RV16 (Q=4.611 AU, arc=21 days, H=19.6 ~407m) from DGRO-RH (Oct. 6.14-15p6) and CSS (Oct. 6.18-20p4)
- K12Q50E 2012 QE50 (arc=39 days, H=18.9 ~562m) from ARO Westfield (Oct. 6.36-38p10)
- K12Q49F 2012 QF49 (arc=2 opp, H=17.1 ~1.29 km) from ARO Westfield (Oct. 6.34-36p7)
- K12Q42F 2012 QF42 (arc=41 days, H=21.6 ~162m) from ARO Westfield (Oct. 6.38-39p5)
- K12L11E 2012 LE11 (Q=4.476 AU, arc=114 days, H=18.1 ~812m) from CSS (Oct. 6.42-44p4)
- K12J17R 2012 JR17 (Q=4.121 AU, arc=145 days, H=17.8 ~933m) from ARO Westfield (Oct. 6.41-42p4)
- K09T03B 2009 TB3 (arc=2 opp, H=21.1 ~204m) from the Mt. Lemmon Survey (MLS) (Oct. 6.43-46p4)
- K08T03Z 2008 TZ3 (arc=3 opp, H=20.4 ~282m) from PS1 (Oct. 6.48-50p3)
- K07T65R 2007 TR65 (i=43.5°, arc=3 opp, H=18.9 ~562m) from CSS (Oct. 6.42-44p4) and PS1 (Oct. 6.52-58p4)
- K07R19T 2007 RT19 (arc=3 opp, H=18.3 ~741m) from CSS (Oct. 6.21-23p4 & 6.33p4)
- K05S01T 2005 ST1 (arc=4 opp, H=20.3 ~295m) from Cordell-Lorenz Obs. (Oct. 5.27-32p5 & 6.33-34p2) and DGRO-RH (Oct. 6.15p6)
- K04X14N 2004 XN14 (arc=4 opp, H=19.9 ~355m) from PS1 (Oct. 4.59-60p2)
- K02U31A 2002 UA31 (arc=5 opp, H=18.9 ~562m) from Slooh.com CIO (Oct. 5.86p2 & 5.91p2)
- J98S36E 1998 SE36 (arc=5 opp, H=19.5 ~426m) from Tenagra II Obs. (Oct. 6.36-39p3) and CSS (Oct. 6.37-39p4)
- X0825 330825 2008 XE3 from Beckman Obs. (Oct. 6.13-15p3)
- W9520 329520 2002 SV from Slooh.com CIO (Oct. 5.88p2 & 5.93p2)
- H8871 178871 2001 MA8 from CSS (Oct. 6.15-17p4)
- H1839 171839 2001 JM1 from PS1 (Oct. 5.51-52p2)
- E4922 144922 2005 CK38 from MLS (Oct. 6.33-35p3)
- E4411 144411 2004 EW9 from Beckman Obs. (Oct. 6.09-10p3)
- 12538 12538 1998 OH from PS1 (Oct. 5.52-53p2)
- 03360 3360 Syrinx (1981 VA) from Beckman Obs. (Oct. 6.17p3)
- 03288 3288 Seleucus (1982 DV) from CSS (Oct. 6.45-47p4)
Observers on 7 October '12
Sixteen observers appeared in this day's MPECs.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 10 in MPEC 2012-T17 -- 2012 SR56, 2012 SQ56, 2012 SK8, 2012 SK50, 2012 SA59, 2012 RX16, 2012 QF49, 2012 QF42, 2012 QE50, 2012 JR17|
|I56||Beckman Obs. in Spain, 3 in MPEC 2012-T17 -- 330825, 144411, 3360|
|300||Bisei Spaceguard Center in Japan, 1 in MPEC 2012-T17 -- 2012 TV|
|703||Catalina Sky Survey (CSS) in Arizona, 8 in MPECs 2012-T17 & 2012-T18 -- 2012 TC4, 2012 RV16, 2012 LE11, 2007 TR65, 2007 RT19, 1998 SE36, 178871, 3288|
|850||Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2012-T17 -- 2005 ST1|
|G48||Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 4 in MPEC 2012-T17 -- 2012 TV, 2012 TS, 2012 RV16, 2005 ST1|
|J95||Great Shefford Obs. in England, 1 in MPEC 2012-T18 -- 2012 TC4|
|932||McCarthy Obs. in Connecticut, 1 in MPEC 2012-T18 -- 2012 TC4|
|711||McDonald Obs. in Texas, 2 in MPEC 2012-T17 -- 2012 TU, 2012 TS|
|900||Moriyama Obs. in Japan, 1 in MPEC 2012-T18 -- 2012 TC4|
|G96||Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2012-T17 -- 2009 TB3, 144922|
|F51||Pan-STARRS 1 (PS1) in Hawaii, 8 in MPECs 2012-T17 & 2012-T18 -- 2012 TC4, 2012 SK50, 2012 RX16, 2008 TZ3, 2007 TR65, 2004 XN14, 171839, 12538|
|H36||Sandlot Obs. in Kansas, 1 in MPEC 2012-T18 -- 2012 TC4|
|G40||Slooh.com Canary Islands Obs. in the Canary Islands, 3 in MPEC 2012-T17 -- 2012 TV, 2002 UA31, 329520|
|J84||South Obs. in England, 1 in MPEC 2012-T18 -- 2012 TC4|
|926||Tenagra II Obs. in Arizona, 1 in MPEC 2012-T17 -- 1998 SE36|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 7 October '12
Notes for Today's Latest Risk Assessments
|2012 TV||JPL Sentry||1416||2070-2107||7||9.6e-06||-5.10||-5.12||0||JPL: "Analysis based on 175 observations spanning 1.6081 days (2012-Oct-05.32361 to 2012-Oct-06.93169)." Diameter approximately 0.031 km. from mean, weighted H=25.2.|
|NEODyS||1416||2070-2096||14||1.39e-06||-5.93||-6.06||0||NEODyS: "Based on 175 optical observations (of which 0 are rejected as outliers) from 2012-10-05.324 to 2012-10-06.932."|
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 7 October '12
Times are UTC for when items were noted or added by The Tracking News.
|1715||Updated Traffic Report|
|1524||Grabbed MPEC 2012-T18 - 2012 TC4 - see above|
|1416||Noted that JPL Sentry has updated its 2012 TV risk assessment - see above|
Noted that NEODyS has posted 2012 TV as an impact risk - see above
Grabbed MPEC 2012-T17 - Daily Orbit Update - see above