Contents on 29 September '12
- Traffic Report -- three objects
- IAU Minor Planet Center
- Observers -- fourteen observers
- Impact Risk Monitoring -- one object
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page (archive)
Of 446 risk-listed objects, 15 have had news in the last 30 days. Updated at 1505 UTC on 29 Sept.
- 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 29 September '12
Three objects reported inside ten LD
There are three visitors reported passing inside ten lunar distances (LD) of Earth today. Risk-listed 2012 SY49 is outbound from 4.29 to 7.44 LD and 2012 SL50 from 5.35 to 7.77 LD, and 2012 SJ58 is calculated with some uncertainty to come within the ten-LD "bubble," moving from 11.7 to 9.7 LD.
Coming our way next, 2010 JK1 arrives inside ten LD on November 22nd.
This report was generated at 1506 UTC. [Not noted here this day, but follow-up for distant 2003 UV11 was reported the day's DOU MPEC.]
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 29 September '12
The MPC's NEO Confirmation Page has 7 listings
When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seven objects listed. Of these, five were "one nighters." So far The Tracking News has counted a total of twelve listings on the NEOCP today.
New MPECs on 29 September '12
Minor Planet Electronic Circulars
As of last check at 2359 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2012-S85 time-stamped "06:03 UT" - Daily Orbit Update - see below
- MPEC 2012-S86 time-stamped "15:32 UT" - 2012 SA59
MPEC 2012-S86 - "15:32 UT" - 2012 SA59
- K12S59A 2012 SA59 (H=18.9 ~562m) from the Catalina Sky Survey (CSS) (Sept. 27.26-27p3 & 27.35p4), the Mt. Lemmon Survey (MLS) (Sept. 27.30-31p6), Great Shefford Obs. (Sept. 27.83-84p3 & 29.09-10p3), Hoyerswerda Obs. (Sept. 28.83-87p4), Raheny Obs. (Sept. 28.92-93p3), Sandlot Obs. (Sept. 29.30-32p5), and Astronomical Research Obs. Westfield (Sept. 29.31-32p4)
- Observations of close-passing objects
- K03U11V 2003 UV11 (q=0.345 AU, arc=3 opp, H=19.5 ~426m) from David Tholen's team on Mauna Kea (July 22.62p2 at R=22.2-3)
- Observation campaigns (radar support, potential mission destinations)
- L4869 214869 2007 PA8 (radar) from Urseanu Obs. (Sept. 23.90-94p8)
-- Planetary radar schedules: Arecibo & Goldstone
- Observations of other asteroidal objects
- K12Q50E 2012 QE50 (arc=31 days, H=18.9 ~562m) from Slooh.com Canary Islands Obs. (Sept. 28.20-22p6)
- K12Q49F 2012 QF49 (arc=2 opp, H=17.1 ~1.29 km) from NEAT's Mt. Palomar telescope (2003 March 22.30-32p2 & 2003 March 22.37p1)
- K12J11S 2012 JS11 (Q=4.745 AU, arc=137 days, H=20.1 ~323m) from An Carraig Obs. (Sept. 28.84-87p3)
- K10OA1D 2010 OD101 (arc=2 opp, H=20.8 ~234m) from Spacewatch via Kitt Peak Natl. Obs. (KPNO) (March 14.42-43p3 & 15.38-39p3)
- K10N03G 2010 NG3 from Spacewatch/KPNO (March 15.15-16p3 at R=22.0-22.1)
- K10LD4U 2010 LU134 (arc=2 opp, H=19.5 ~426m) from Spacewatch/KPNO (March 15.32-33p3 at R=23.5-24.1)
- K10L97O 2010 LO97 (arc=2 opp, H=18.8 ~589m) from Spacewatch/KPNO (March 15.36p3 at R=23.0-6)
- K10L68R 2010 LR68 (Q=4.882 AU, arc=3 opp, H=18.3 ~741m) from Spacewatch/KPNO (March 15.34-35p3 at R=24.1-6)
- K10L14M 2010 LM14 (arc=3 opp, H=21.5 ~170m) from Spacewatch/KPNO (March 15.20-21p3 at R=22.2-3)
- K10J33L 2010 JL33 (Q=4.635 AU, arc=5 opp, H=17.7 ~977m) from Spacewatch/KPNO (March 14.38-39p3 at R=23.4-6)
- K10E20H 2010 EH20 (arc=2 opp, H=18.0 ~851m) from Spacewatch/KPNO (March 15.25p3 at R=23.6-9)
- K10C18G 2010 CG18 (arc=2 opp, H=20.8 ~234m) from Spacewatch/KPNO (March 15.42-43p3)
- X0825 330825 2008 XE3 from Bisei Spaceguard Center (Sept. 27.50-57p4, 27.73-74p2, 27.78p1, 28.46-47p3 & 28.55p1)
- U8043 308043 2004 TH10 from Tholen team/Mauna Kea (July 22.60p2)
- D6874 136874 1998 FH74 from Spacewatch/KPNO (March 15.41-42p3)
- 05646 5646 1990 TR from Urseanu Obs. (Sept. 23.96-98p9)
Observers on 29 September '12
Fourteen observers appear in today's MPECs.
|Code||Observer / observatory|
|J16||An Carraig Obs. in Northern Ireland, 1 in MPEC 2012-S85 -- 2012 JS11|
|H21||Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2012-S86 -- 2012 SA59|
|300||Bisei Spaceguard Center in Japan, 1 in MPEC 2012-S85 -- 330825|
|703||Catalina Sky Survey in Arizona, 1 in MPEC 2012-S86 -- 2012 SA59|
|J95||Great Shefford Obs. in England, 1 in MPEC 2012-S86 -- 2012 SA59|
|C43||Hoyerswerda Obs. in Germany, 1 in MPEC 2012-S86 -- 2012 SA59|
|695^||Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 10 in MPEC 2012-S85 -- 2010 OD101, 2010 NG3, 2010 LU134, 2010 LR68, 2010 LO97, 2010 LM14, 2010 JL33, 2010 EH20, 2010 CG18, 136874|
|5682||David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2012-S85 -- 2003 UV11, 308043|
|G96||Mt. Lemmon Survey in Arizona, 1 in MPEC 2012-S86 -- 2012 SA59|
|644||NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2012-S85 -- 2012 QF49|
|J41||Raheny Obs. in Ireland, 1 in MPEC 2012-S86 -- 2012 SA59|
|H36||Sandlot Obs. in Kansas, 1 in MPEC 2012-S86 -- 2012 SA59|
|G40||Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2012-S85 -- 2012 QE50|
|A92||Urseanu Obs. in Romania, 2 in MPEC 2012-S85 -- 214869, 5646|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 29 September '12
Notes for Today's Latest Risk Assessments
|2012 SG58||NEODyS||1505||2060-2060||1||3.13e-08||-6.49||-6.49||0||NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2012-09-26.260 to 2012-09-28.115."|
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 29 September '12
Times are UTC for when items were noted or added by The Tracking News.
|1630||Grabbed MPEC 2012-S86 - 2012 SA59 - see above|
|1506||Generated Traffic Report|
|1505||Noted that NEODyS has posted 2012 SG58 as an impact risk - see above|
Grabbed MPEC 2012-S85 - Daily Orbit Update - see above