Contents on 4 October '12
- Traffic Report -- one object
- IAU Minor Planet Center
- Observers -- eleven observers
- Impact Risk Monitoring -- one object
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page (archive)
Of 445 risk-listed objects, 13 have had news in the last 30 days. Updated at 1617 UTC on 4 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 4 October '12
One object reported inside ten LD
There is one asteroid reported moving inside ten lunar distances (LD) of our planet today. 2012 SJ58 is calculated with some uncertainty to be outbound from 6.2 to 7.3 LD. Next known coming to the neighborhood is 2010 JK1, which arrives inside ten LD on November 22nd.
This report was generated at 1619 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 4 October '12
The MPC's NEO Confirmation Page has 16 listings
When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had sixteen objects listed. All of these were "one nighters."
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 4 October '12
Minor Planet Electronic Circulars
As of last check at 2359 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- Observations of risk-listed objects
- K12S58G 2012 SG58 (small asteroid, Q=4.888 AU, arc=8 days, H=23.1 ~81m) from Sandlot Obs. (Oct. 3.38-39p3) and Great Shefford Obs. (Oct. 4.11-13p4)
- Observation campaigns (radar support, potential mission destinations)
- L4869 214869 2007 PA8 (radar) from Seveso Obs. (Oct. 2.93-97p7)
-- Planetary radar schedules: Arecibo & Goldstone
- Observations of small asteroids (H>22.0)
- K12S50K 2012 SK50 (arc=10 days, H=24.8 ~37m) from Sandlot Obs. (Oct. 3.33-35p3)
- K12S02Y 2012 SY2 (arc=17 days, H=22.1 ~129m) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Oct. 3.04p3)
- Observations of other asteroidal objects
- K12S56Q 2012 SQ56 (Q=4.658 AU, arc=11 days, H=17.6 ~1.02 km) from Sandlot Obs. (Oct. 3.37-38p3)
- K12S09T 2012 ST9 (arc=16 days, H=19.8 ~371m) from Desert Moon Obs. (Oct. 3.30-34p3)
- K12R16S 2012 RS16 (arc=18 days, H=21.3 ~186m) from Holmes/CTIO (Oct. 3.08-09p4)
- K12Q50E 2012 QE50 (arc=36 days, H=18.8 ~589m) from Seveso Obs. (Oct. 2.88-89p10)
- K12Q10O 2012 QO10 (arc=47 days, H=18.8 ~589m) from Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) (Oct. 3.09-10p4)
- K12Q08G 2012 QG8 (arc=34 days, H=19.2 ~490m) from David Tholen's team on Mauna Kea (Sept. 14.48p3 at R=22.0-22.2)
- K12K18K 2012 KK18 (Q=4.257 AU, arc=136 days, H=18.4 ~708m) from Desert Moon Obs. (Oct. 3.37-41p3)
- K10L33R 2010 LR33 (arc=3 opp, H=18.0 ~851m) from Holmes/CTIO (Oct. 2.99p3)
- K09SH0B 2009 SB170 (q=0.347 AU, arc=4 opp, H=20.8 ~234m) from Holmes/CTIO (Oct. 2.99p3)
- K04R10X 2004 RX10 (arc=3 opp, H=21.3 ~186m) from Sandlot Obs. (Oct. 3.41-42p3)
- X3889 333889 1998 SV4 from New Millennium Obs. (Sept. 20.86p4)
- X0825 330825 2008 XE3 from Palmer Divide Obs. (Oct. 3.19-31p5), Sandlot Obs. (Oct. 3.40-41p4), and Teide Obs. (Oct. 3.98-03p3)
- W9520 329520 2002 SV from Pear Tree Obs. (Oct. 3.16-19p3)
- Q5962 265962 2006 CG from Desert Moon Obs. (Oct. 3.07-08p3)
- N2368 232368 2003 AZ2 from Desert Moon Obs. (Oct. 3.44-50p4)
- 04487 4487 Pocahontas (1987 UA) from New Millennium Obs. (Sept. 20.83p2 & 20.88p2)
Observers on 4 October '12
Eleven observers appear in today's MPEC.
|Code||Observer / observatory|
|807|||Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPEC 2012-T09 -- 2012 SY2, 2012 RS16, 2010 LR33, 2009 SB170|
|448||Desert Moon Obs. in New Mexico, 4 in MPEC 2012-T09 -- 2012 ST9, 2012 KK18, 265962, 232368|
|G48||Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2012-T09 -- 2012 QO10|
|J95||Great Shefford Obs. in England, 1 in MPEC 2012-T09 -- 2012 SG58|
|5682||David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-T09 -- 2012 QG8|
|A24||New Millennium Obs. in Italy, 2 in MPEC 2012-T09 -- 333889, 4487|
|716||Palmer Divide Obs. in Colorado, 1 in MPEC 2012-T09 -- 330825|
|H23||Pear Tree Obs. in Florida, 1 in MPEC 2012-T09 -- 329520|
|H36||Sandlot Obs. in Kansas, 5 in MPEC 2012-T09 -- 2012 SQ56, 2012 SK50, 2012 SG58, 2004 RX10, 330825|
|C24||Seveso Obs., 2 in MPEC 2012-T09 -- 2012 QE50, 214869|
|954||Teide Obs. in the Canary Islands, 1 in MPEC 2012-T09 -- 330825|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 4 October '12
Notes for Today's Latest Risk Assessments
|2012 SG58||NEODyS||1615||2060-2060||1||1.05e-08||-6.90||-6.9||0||NEODyS: "Based on 35 optical observations (of which 2 are rejected as outliers) from 2012-09-26.260 to 2012-10-04.131."|
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 4 October '12
Times are UTC for when items were noted or added by The Tracking News.
|1619||Generated Traffic Report|
|1615||Noted that NEODyS has updated its 2012 SG58 risk assessment - see above|
Grabbed MPEC 2012-T09 - Daily Orbit Update - see above
|1614||Noted that the NEOCP has become active|