Contents on 31 October '12
- Traffic Report -- four objects
- IAU Minor Planet Center
- Observers -- ten observers
- Impact Risk Monitoring -- one object
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page (archive)
Of 464 risk-listed objects, 25 have had news in the last 30 days. Updated at 1502 UTC on 31 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 31 October '12
Four objects reported inside ten LD
There are four objects reported flying inside ten lunar distances (LD) of our planet today. Risk-listed 2012 UU169 is outbound from 4.85 to 7.03 LD and 2012 UK171 from 8.32 to 8.92 LD while 2012 UX136 is inbound from 6.46 to 5.41 LD and 2012 UL171 from 8.1 to 7.9 LD*,
Coming toward Earth next, 2012 UV136 arrives inside ten LD tomorrow, risk-listed 2012 UY68 arrives on November 7th, and radar target 2010 JK1 on November 22nd.
This report was updated at 2040 UTC with a new discovery, already departed 2012 UB174 (MPEC). Today's first traffic report was generated at 1503 UTC with follow-up in today's DOU MPEC for 2012 UX136 and 2012 UV136.
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. "LD*" indicates some passage uncertainty. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.
NEOCP Activity on 31 October '12
The MPC's NEO Confirmation Page has 15 listings
When last checked at 2344 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had fifteen objects listed. Of these, nine were "one nighters." So far The Tracking News has counted a total of eighteen 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 31 October '12
Minor Planet Electronic Circulars
As of last check at 2344 UTC, there have been three MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2012-U122 time-stamped "06:07 UT" - Daily Orbit Update - see below
- MPEC 2012-U123 time-stamped "16:31 UT" - 2012 UA174 - see below
- MPEC 2012-U124 time-stamped "17:39 UT" - 2012 UB174
MPEC 2012-U124 - "17:39 UT" - 2012 UB174
- K12UH4B 2012 UB174 (Earth MOID=6.1 LD, H=24.9 ~35m, close passer) from the Mt. Lemmon Survey (MLS) (Oct. 26.28-34p8 & 26.43-45p4), Hidetaka Sato via RAS Obs. Mayhill (Oct. 26.44p3), Sandlot Obs. (Oct. 27.21-23p3), and Astronomical Research Obs. Westfield (Oct. 27.28-29p3)
MPEC 2012-U123 - "16:31 UT" - 2012 UA174
- K12UH4A 2012 UA174 (small asteroid, H=22.8 ~93m) from MLS (Oct. 25.15-16p4, 25.21-23p4, 27.26-28p3 & 31.19p3) and ARO Westfield (Oct. 27.32-33p4)
- Observations of risk-listed objects
- K12UF8R 2012 UR158 (q=0.325 AU, Q=4.149 AU, arc=8 days, H=20.6 ~257m) from Petit Jean Mtn. South Obs. (PJMSO) (Oct. 30.29-30p10) and Great Shefford Obs. (Oct. 30.94p2)
- Observations of close-passing objects
- K12UD6X 2012 UX136 (arc=8 days, H=25.6 ~26m) from Tim Lister via Faulkes Telescope South (Oct. 30.50-51p3 & 30.71-72p3)
- K12UD6V 2012 UV136 (arc=5 days, H=25.6 ~26m, PMD candidate) from ARO Westfield (Oct. 27.34-35p3)
- Observation campaigns (radar support, potential mission destinations)
- L4869 214869 2007 PA8 (radar) from Desert Moon Obs. (Oct. 30.32p5)
-- Potential mission destinations (PMD) list & ephemerides + NHATS -- Planetary radar schedules: Arecibo & Goldstone
- Observations of other asteroidal objects
- K12TD9M 2012 TM139 (arc=17 days, H=19.4 ~446m) from ARO Westfield (Oct. 27.39-40p3)
- K12S20W 2012 SW20 from Betelgeuse Station (Sept. 19.90-91p5)
- K12Q49F 2012 QF49 (arc=2 opp, H=17.3 ~1.17 km) from PJMSO (Oct. 30.27-28p10)
- K12P28P 2012 PP28 (arc=28 days, H=19.3 ~467m) from ARO Westfield (Aug. 31.07-08p3)
- K12H33Z 2012 HZ33 (arc=185 days, H=20.4 ~282m) from Desert Moon Obs. (Oct. 30.34-37p3)
- K12H01J 2012 HJ1 (arc=2 opp, H=17.9 ~891m) from PJMSO (Oct. 30.31-32p8)
- K09S15B 2009 SB15 (arc=2 opp, H=20.6 ~257m) from Mirasteilas Obs. (Oct. 30.84-85p3)
- K09B02D 2009 BD2 (arc=2 opp, H=17.6 ~1.02 km) from ARO Westfield (Aug. 31.38-39p4)
- K08H04V 2008 HV4 (arc=2 opp, H=19.6 ~407m) from PJMSO (Oct. 30.25p6)
- K02T68Y 2002 TY68 (arc=3 opp, H=18.8 ~589m) from Mirasteilas Obs. (Oct. 30.86-87p3)
- J99V06R 1999 VR6 (arc=2 opp, H=20.8 ~234m) from ARO Westfield (Oct. 27.40-42p5)
- J99T04Z 1999 TZ4 (arc=3 opp, H=19.5 ~426m) from Desert Moon Obs. (Oct. 30.16-20p3)
- W6732 326732 2003 HB6 from ARO Westfield (Oct. 27.17-18p3)
- F5334 155334 2006 DZ169 from ARO Westfield (Oct. 27.15-16p4)
- B2985 112985 2002 RS28 from Desert Moon Obs. (Oct. 30.39-40p4)
- 05660 5660 1974 MA from ARO Westfield (Aug. 31.09p3)
- 05143 5143 Heracles (1991 VL) from Mirasteilas Obs. (Oct. 30.75-78p3)
- 03838 3838 Epona (1986 WA) from Mirasteilas Obs. (Oct. 30.92-93p3)
- 00887 887 Alinda (1918 DB) from ARO Westfield (Aug. 31.15p3)
Observers on 31 October '12
Ten observers appear in today's MPECs.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 11 in MPECs 2012-U122, 2012-U123 & 2012-U124 -- 2012 UV136, 2012 UB174, 2012 UA174, 2012 TM139, 2012 PP28, 2009 BD2, 1999 VR6, 326732, 155334, 5660, 887|
|B75||Betelgeuse Station in Italy, 1 in MPEC 2012-U122 -- 2012 SW20|
|448||Desert Moon Obs. in New Mexico, 4 in MPEC 2012-U122 -- 2012 HZ33, 1999 TZ4, 214869, 112985|
|E100||Tim Lister in southern California via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-U122 -- 2012 UX136|
|J95||Great Shefford Obs. in England, 1 in MPEC 2012-U122 -- 2012 UR158|
|B67||Mirasteilas Obs. in Switzerland, 4 in MPEC 2012-U122 -- 2009 SB15, 2002 TY68, 5143, 3838|
|G96||Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2012-U123 & 2012-U124 -- 2012 UB174, 2012 UA174|
|H45||Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 4 in MPEC 2012-U122 -- 2012 UR158, 2012 QF49, 2012 HJ1, 2008 HV4|
|H06|||Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-U124 -- 2012 UB174|
|H36||Sandlot Obs. in Kansas, 1 in MPEC 2012-U124 -- 2012 UB174|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 31 October '12
Notes for Today's Latest Risk Assessments
|2012 UR158||JPL Sentry||1502||2033||1||1.6e-08||-4.82||-4.82||0||JPL: "Analysis based on 72 observations spanning 8.4683 days (2012-Oct-22.4752 to 2012-Oct-30.94346)." Diameter approximately 0.260 km. from mean, weighted H=20.6.|
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 31 October '12
Times are UTC for when items were noted or added by The Tracking News.
|2040||Updated Traffic Report|
|1915||Grabbed MPEC 2012-U124 - 2012 UB174 - see above|
|1633||Grabbed MPEC 2012-U123 - 2012 UA174 - see above|
|1502||Noted that JPL Sentry has updated its 2012 UR158 risk assessment - see above|
Grabbed MPEC 2012-U122 - Daily Orbit Update - see above