Contents on 8 October '12
- Traffic Report -- two objects
- IAU Minor Planet Center
- Observers -- 25 observers
- Impact Risk Monitoring -- two objects
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)
Of 447 risk-listed objects, 14 have had news in the last 30 days. Updated at 1824 UTC on 8 Oct.
- 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 8 October '12
Two objects reported inside ten LD
Two objects are reported within ten lunar distances (LD) of our planet today. Risk-listed intruder 2012 TV exits Earth's Hill sphere, traveling from 1.55 to 5.20 LD. Further away, risk-listed intruder 2012 TC4 is inbound from 6.28 to 4.80 LD.
Next known to approach Earth, 2010 JK1 arrives inside ten LD on November 22nd.
This report was generated at 1826 UTC with follow-up in today's DOU MPEC for 2012 TV.
Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Earth's Hill sphere (of gravitational influence) is estimated to extend out to around 3.89 LD. 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 8 October '12
The MPC's NEO Confirmation Page has 180 listings
When last checked at 2318 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 180 objects listed. Of these, 145 were "one nighters." So far The Tracking News has counted a total of 234 listings on the NEOCP 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 8 October '12
Minor Planet Electronic Circulars
As of last check at 2318 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2012-T19 time-stamped "06:03 UT" - Daily Orbit Update - see below
- MPEC 2012-T20 time-stamped "12:43 UT" - 2012 TQ5 - see below
- MPEC 2012-T21 time-stamped "12:45 UT" - 2012 TR5 - see below
- MPEC 2012-T22 time-stamped "12:48 UT" - 2012 TS5 - see below
- MPEC 2012-T23 time-stamped "12:50 UT" - 2012 TT5 - see below
- MPEC 2012-T24 time-stamped "17:02 UT" - Comet P/1997 C1 = 2012 S5 (Gehrels)
MPEC 2012-T24 - "17:02 UT" - Comet P/1997 C1 = 2012 S5 (Gehrels)
- PK12S050 P/2012 S5 (q=3.602 AU, Q=10.118 AU, TP=2013 July 7.99372 TT) from the Mt. Lemmon Survey (MLS) (Sept. 25.38-40p4) and the Spacewatch 0.9m telescope (Oct. 8.25-29p3)
- PJ97C010 P/1997 C1 (Gehrels) (q=3.565 AU, Q=9.858 AU, TP=1996 Jan. 29.20478 TT)
MPEC 2012-T23 - "12:50 UT" - 2012 TT5
- K12T05T 2012 TT5 (borderline-small, H=21.8 ~148m) from MLS (Oct. 6.24-25p4 & 6.36-39p4), Great Shefford Obs. (Oct. 6.82p3), Frasso Sabino Obs. (Oct. 6.87p3), Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) (Oct. 7.13-14p3), McCarthy Obs. (Oct. 7.20-22p4), Sandlot Obs. (Oct. 7.22-23p3 & 8.14-15p3), Bisei Spaceguard Center (Oct. 7.48-49p3), Moriyama Obs. (Oct. 7.53-54p3), Terskol Obs. (Oct. 7.68-69p3), and Magdalena Ridge Obs. (MRO) (Oct. 8.14-16p4)
MPEC 2012-T22 - "12:48 UT" - 2012 TS5
- K12T05S 2012 TS5 (borderline-small, H=22.0 ~135m) from the Catalina Sky Survey (CSS) (Oct. 6.21-23p4, 6.28p4 & 6.33p4), Astronomical Research Obs. Westfield (Oct. 6.28-29p4), Wiggins Obs. (Oct. 6.37p3 & 7.28-29p3), Great Shefford Obs. (Oct. 6.80-81p3), Frasso Sabino Obs. (Oct. 6.84p3), Chelmsford Obs. (Oct. 6.94-95p3), An Carraig Obs. (Oct. 6.95-96p3), Raheny Obs. (Oct. 6.99-00p3), DGRO-RH (Oct. 7.10p4), McCarthy Obs. (Oct. 7.18p3), Sandlot Obs. (Oct. 7.29p4 & 8.18-19p4), Bisei (Oct. 7.53-54p5), Moriyama Obs. (Oct. 7.55-57p3), New Millennium Obs. (Oct. 7.89-90p4), and MRO (Oct. 8.14-16p4)
MPEC 2012-T21 - "12:45 UT" - 2012 TR5
- K12T05R 2012 TR5 (small asteroid, H=25.5 ~27m) from MLS (Oct. 5.30-32p4), ARO Westfield (Oct. 6.20-22p4), Great Shefford Obs. (Oct. 6.99-01p2), and MRO (Oct. 8.15-17p4)
MPEC 2012-T20 - "12:43 UT" - 2012 TQ5
- K12T05Q 2012 TQ5 (small asteroid, H=25.2 ~31m) from CSS (Oct. 5.29-38p11), MLS (Oct. 5.35-37p4), Tim Lister via Faulkes Telescope South (Oct. 5.74p3), ARO Westfield (Oct. 6.24-25p4), Great Shefford Obs. (Oct. 6.97-98p2), Sandlot Obs. (Oct. 7.33p3 & 8.24-25p4), and MRO (Oct. 8.25-27p4)
- Observations of risk-listed objects
- K12T00V 2012 TV (small asteroid, arc=2 days, H=25.2 ~31m, close passer) from program code 5 via Simeis Obs. (Oct. 6.79p8) and Great Shefford Obs. (Oct. 7.14p3)
- Observation campaigns (radar support, potential mission destinations)
- L4869 214869 2007 PA8 (radar) from Pan-STARRS 1 (PS1) (Oct. 7.49-53p4)
-- Planetary radar schedules: Arecibo & Goldstone
- Observations of small asteroids (H>22.0)
- K09T00K 2009 TK (arc=2 opp, H=22.2 ~123m) from Simeis Obs./code 5 (Oct. 6.87-88p40) and DGRO-RH (Oct. 7.12-13p5)
- Observations of other asteroidal objects
- K12R16V 2012 RV16 (Q=4.610 AU, arc=23 days, H=19.6 ~407m) from Tesla Obs. (Oct. 7.83p2 & 7.88-91p9)
- K12R16Q 2012 RQ16 (arc=24 days, H=20.8 ~234m) from Ka-Dar Obs. TAU Station (Oct. 7.72-73p4)
- K12Q17B 2012 QB17 (arc=45 days, H=20.0 ~339m) from Frasso Sabino Obs. (Oct. 6.78-79p4) and Peschiera del Garda Obs. (Oct. 7.85-87p3)
- K12O01E 2012 OE1 (arc=79 days, H=20.2 ~309m) from PS1 (Oct. 7.27-31p4)
- K12O01A 2012 OA1 (arc=81 days, H=21.3 ~186m) from PS1 (Oct. 7.26-31p3)
- K12J11S 2012 JS11 (Q=4.745 AU, arc=146 days, H=20.2 ~309m) from Peschiera del Garda Obs. (Oct. 7.91-93p6)
- K08SP1S 2008 SS251 (arc=2 opp, H=21.1 ~204m) from PS1 (Oct. 7.50-52p3)
- K05S01T 2005 ST1 (arc=4 opp, H=20.3 ~295m) from DGRO-RH (Oct. 7.12p6)
- K04T19L 2004 TL19 (arc=3 opp, H=20.7 ~245m) from PS1 (Oct. 7.28-31p3)
- X4412 334412 2002 EZ2 from Tenagra II Obs. (Oct. 7.26-28p3)
- X3889 333889 1998 SV4 from Peschiera del Garda Obs. (Sept. 17.92-94p4)
- G2900 162900 2001 HG31 from PS1 (Oct. 6.34-36p2) and Tenagra II Obs. (Oct. 7.21-23p3)
Observers on 8 October '12
A total of 25 observers appear in today's MPECs.
|Code||Observer / observatory|
|J16||An Carraig Obs. in Northern Ireland, 1 in MPEC 2012-T22 -- 2012 TS5|
|H21||Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2012-T20, 2012-T21 & 2012-T22 -- 2012 TS5, 2012 TR5, 2012 TQ5|
|300||Bisei Spaceguard Center in Japan, 2 in MPECs 2012-T22 & 2012-T23 -- 2012 TT5, 2012 TS5|
|703||Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2012-T20 & 2012-T22 -- 2012 TS5, 2012 TQ5|
|970||Chelmsford Obs. in England, 1 in MPEC 2012-T22 -- 2012 TS5|
|G48||Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 4 in MPECs 2012-T19, 2012-T22 & 2012-T23 -- 2012 TT5, 2012 TS5, 2009 TK, 2005 ST1|
|E100||Tim Lister in southern California via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-T20 -- 2012 TQ5|
|157||Frasso Sabino Obs. in Italy, 3 in MPECs 2012-T19, 2012-T22 & 2012-T23 -- 2012 TT5, 2012 TS5, 2012 QB17|
|J95||Great Shefford Obs. in England, 5 in MPECs 2012-T19, 2012-T20, 2012-T21, 2012-T22 & 2012-T23 -- 2012 TV, 2012 TT5, 2012 TS5, 2012 TR5, 2012 TQ5|
|C32||Ka-Dar Obs. TAU Station in Russia, 1 in MPEC 2012-T19 -- 2012 RQ16|
|H01||Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2012-T20, 2012-T21, 2012-T22 & 2012-T23 -- 2012 TT5, 2012 TS5, 2012 TR5, 2012 TQ5|
|932||McCarthy Obs. in Connecticut, 2 in MPECs 2012-T22 & 2012-T23 -- 2012 TT5, 2012 TS5|
|900||Moriyama Obs. in Japan, 2 in MPECs 2012-T22 & 2012-T23 -- 2012 TT5, 2012 TS5|
|G96||Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2012-T20, 2012-T21, 2012-T23 & 2012-T24 -- 2012 TT5, 2012 TR5, 2012 TQ5, P/2012 S5|
|A24||New Millennium Obs. in Italy, 1 in MPEC 2012-T22 -- 2012 TS5|
|F51||Pan-STARRS 1 (PS1) in Hawaii, 6 in MPEC 2012-T19 -- 2012 OE1, 2012 OA1, 2008 SS251, 2004 TL19, 214869, 162900|
|A53||Peschiera del Garda Obs. in Italy, 3 in MPEC 2012-T19 -- 2012 QB17, 2012 JS11, 333889|
|J41||Raheny Obs. in Ireland, 1 in MPEC 2012-T22 -- 2012 TS5|
|H36||Sandlot Obs. in Kansas, 3 in MPECs 2012-T20, 2012-T22 & 2012-T23 -- 2012 TT5, 2012 TS5, 2012 TQ5|
|0945||program code 5 via Simeis Obs. in the Ukraine, 2 in MPEC 2012-T19 -- 2012 TV, 2009 TK|
|691||Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2012-T24 -- P/2012 S5|
|926||Tenagra II Obs. in Arizona, 2 in MPEC 2012-T19 -- 334412, 162900|
|B18||Terskol Obs. in Russia, 1 in MPEC 2012-T23 -- 2012 TT5|
|I76||Tesla Obs. in Spain, 1 in MPEC 2012-T19 -- 2012 RV16|
|718||Wiggins Obs. in Utah, 1 in MPEC 2012-T22 -- 2012 TS5|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 8 October '12
Notes for Today's Latest Risk Assessments
|2012 TC4||NEODyS||1819||2024-2057||4||2.52e-07||-7.05||-7.3||0||NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2012-10-04.468 to 2012-10-07.519."|
|2012 TV||JPL Sentry||1819||2070-2107||11||1.6e-06||-5.85||-6.17||0||JPL: "Analysis based on 184 observations spanning 1.8162 days (2012-Oct-05.32361 to 2012-Oct-07.139772)." Diameter approximately 0.031 km. from mean, weighted H=25.2.|
|NEODyS||1819||2070-2096||15||1.38e-06||-5.91||-6.37||0||NEODyS: "Based on 186 optical observations (of which 2 are rejected as outliers) from 2012-10-05.324 to 2012-10-07.141."|
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 8 October '12
Times are UTC for when items were noted or added by The Tracking News.
|1826||Generated Traffic Report|
|1819||Noted that JPL Sentry has updated its 2012 TV risk assessment - see above|
Noted that NEODyS has updated its 2012 TV risk assessment - see above
Grabbed MPEC 2012-T21 - 2012 TR5 - see above
|1818||Noted that NEODyS has posted 2012 TC4 as an impact risk - see above|
Grabbed MPEC 2012-T19 - Daily Orbit Update - see above
Grabbed MPEC 2012-T20 - 2012 TQ5 - see above
Grabbed MPEC 2012-T22 - 2012 TS5 - see above
Grabbed MPEC 2012-T23 - 2012 TT5 - see above
Grabbed MPEC 2012-T24 - Comet P/1997 C1 = 2012 S5 (Gehrels) - see above