Contents on 8 February '12
- Traffic Report -- no objects
- IAU Minor Planet Center
- Observers -- ten observers
- Impact Risk Monitoring -- two objects
- Consolidated Risk Tables - the CRT page (archive)
Of 439 risk-listed objects, 27 have had news in the last 31 days. Updated at 1515 UTC on 8 Feb.
- Earth's Busy Neighborhood close passer EBN Traffic Report
No objects are known to be within ten LD of Earth today. Updated at 1551 UTC on 8 Feb.
- 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 27 Jan.
- 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 February '12
No objects reported inside ten LD
No objects are reported within ten lunar distances (LD) of Earth today. Radar target 2011 CP4 arrives inside ten LD on February 22nd.
This report was updated at 1518 UTC with follow-up in today's DOU MPEC for 2012 CU.
Notes: Ten LD has no astronomical significance but is a useful reporting boundary. Distances are interpreted by A/CC from JPL Horizons data. See also today's timeline plus current additional details, sky chart, and ephemerides.
NEOCP Activity on 8 February '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, four 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 8 February '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
- K12C00U 2012 CU (small asteroid, arc=5 days, H=26.1 ~20m, close passer) from Magdalena Ridge Obs. (MRO) (Feb. 7.34-38p4)
- K12B86J 2012 BJ86 (arc=8 days, H=21.6 ~162m) from Astronomical Research Obs. Westfield (Feb. 6.05-07p3)
- Observations of recently (no longer) risk-listed objects
- K12B86M 2012 BM86 (almost small, arc=9 days, H=21.9 ~141m) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Feb. 7.37-39p4)
- K12B11N 2012 BN11 (arc=19 days, H=20.9 ~224m) from MRO (Feb. 7.44-48p4)
- Observation campaigns (radar support, potential mission destinations)
- K11Y74U 2011 YU74 (arc=42 days, H=23.0 ~85m, PMD candidate) from Holmes/CTIO (Feb. 7.02-04p5)
- H5706 175706 1996 FG3 (PMD) from Teide Obs. (Jan. 23.81-12p28)
- F3814 153814 2001 WN5 (PMD) from NEAT's USAF Haleakala telescope (2001 Nov. 20.25-27p3)
-- Potential mission destinations list & ephemerides
- Observations of small asteroids (H>22.0)
- K12C00A 2012 CA (i=36.1°, arc=5 days, H=23.5 ~68m) from ARO Westfield (Feb. 6.25-26p3)
- K12B77M 2012 BM77 (arc=10 days, H=23.9 ~56m) from ARO Westfield (Feb. 6.17-18p3)
- K12B77K 2012 BK77 (arc=11 days, H=22.4 ~112m) from ARO Westfield (Feb. 6.23-24p3)
- Observations of other asteroidal objects
- K12C00T 2012 CT (arc=4 days, H=21.3 ~186m) from ARO Westfield (Feb. 6.22-23p3)
- K12BC4C 2012 BC124 (i=41.6°, arc=7 days, H=19.7 ~389m) from ARO Westfield (Feb. 6.20-21p3)
- K12B86G 2012 BG86 (q=0.314 AU, arc=10 days, H=21.3 ~186m) from ARO Westfield (Feb. 6.14-16p3)
- K12A11A 2012 AA11 (arc=23 days, H=20.1 ~323m) from ARO Westfield (Feb. 6.09-10p3)
- K11Y62U 2011 YU62 (Q=4.767 AU, arc=39 days, H=17.5 ~1.07 km) from Holmes/CTIO (Feb. 6.02-04p9 & 7.02-04p4)
- K11Y06L 2011 YL6 (arc=44 days, H=21.4 ~178m) from ARO Westfield (Feb. 6.19-22p3)
- K11Y01W 2011 YW1 (arc=50 days, H=19.7 ~389m) from ARO Westfield (Feb. 6.16-18p3)
- K11X03O 2011 XO3 (Q=5.385 AU, arc=67 days, H=16.6 ~1.62 km) from ARO Westfield (Feb. 6.02-04p3)
- K11X01E 2011 XE1 (arc=65 days, H=18.2 ~776m) from Holmes/CTIO (Feb. 6.02-04p7) and ARO Westfield (Feb. 6.11-13p3)
- K11WD4V 2011 WV134 (Q=4.676 AU, arc=2 opp, H=17.1 ~1.29 km) from Vicksburg Obs. (Jan. 19.14-17p3), ARO Westfield (Feb. 6.11-12p4), and AGM Obs. (Feb. 6.80-84p4)
- K11SA2L 2011 SL102 (arc=3 opp, H=18.2 ~776m) from North Obs. (Feb. 7.84-85p5)
- K11Q14F 2011 QF14 (arc=167 days, H=18.8 ~589m) from Holmes/CTIO (Feb. 6.02-04p4) and ARO Westfield (Feb. 6.13-15p3)
- K11P06W 2011 PW6 (arc=2 opp, H=18.6 ~645m) from Holmes/CTIO (Feb. 6.39p2 & 7.37-38p2)
- K11M05D 2011 MD5 (arc=2 opp, H=17.8 ~933m) from ARO Westfield (Feb. 6.02-03p2)
- K11F29C 2011 FC29 (arc=2 opp, H=21.0 ~214m) from ARO Westfield (Feb. 6.05-06p3)
- K06A08L 2006 AL8 (q=0.377 AU, Q=6.300 AU, arc=2 opp, H=18.4 ~708m) from Cupillari Obs. (Feb. 7.06-10p3)
- K04Y05U 2004 YU5 (arc=2 opp, H=18.9 ~562m) from ARO Westfield (Feb. 6.08-10p3)
- G3243 163243 2002 FB3 from Auger Obs. (Feb. 7.22-23p3)
- 08567 8567 1996 HW1 from AGM Obs. (Feb. 6.85-88p4)
- 01627 1627 Ivar (1929 SH) from Cupillari Obs. (Feb. 7.03-08p3)
Observers on 8 February '12
Ten observers appear in today's MPEC.
|Code||Observer / observatory|
|I69||AGM Obs., 2 in MPEC 2012-C35 -- 2011 WV134, 8567|
|H21||Astronomical Research Obs. Westfield in Illinois, 17 in MPEC 2012-C35 -- 2012 CT, 2012 CA, 2012 BM77, 2012 BK77, 2012 BJ86, 2012 BG86, 2012 BC124, 2012 AA11, 2011 YW1, 2011 YL6, 2011 XO3, 2011 XE1, 2011 WV134, 2011 QF14, 2011 MD5, 2011 FC29, 2004 YU5|
|I47||Auger Obs. in Argentina, 1 in MPEC 2012-C35 -- 163243|
|807|||Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPEC 2012-C35 -- 2012 BM86, 2011 YU74, 2011 YU62, 2011 XE1, 2011 QF14, 2011 PW6|
|I17||Cupillari Obs. in Pennsylvania, 2 in MPEC 2012-C35 -- 2006 AL8, 1627|
|H01||Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPEC 2012-C35 -- 2012 CU, 2012 BN11|
|608||NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2012-C35 -- 153814|
|J69||North Obs. in England, 1 in MPEC 2012-C35 -- 2011 SL102|
|954||Teide Obs. in the Canary Islands, 1 in MPEC 2012-C35 -- 175706|
|H47||Vicksburg Obs. in Mississippi, 1 in MPEC 2012-C35 -- 2011 WV134|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 8 February '12
Notes for Today's Latest Risk Assessments
|2012 CU||JPL Sentry||1515||2040-2100||5||1.4e-06||-6.54||-6.82||0||JPL: "Analysis based on 41 observations spanning 4.9765 days (2012-Feb-02.40401 to 2012-Feb-07.38055)." Diameter approximately 0.022 km. from mean, weighted H=26.0.|
|NEODyS||1515||2040-2040||1||4.78e-08||-7.56||-7.56||0||NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2012-02-02.405 to 2012-02-07.381."|
|2012 BJ86||JPL Sentry||1515||2085-2108||5||1.5e-06||-4.27||-4.60||0||JPL: "Analysis based on 34 observations spanning 7.9690 days (2012-Jan-29.10142 to 2012-Feb-06.070446)." Diameter approximately 0.160 km. from mean, weighted H=21.6.|
|NEODyS||1515||2085-2085||1||2.78e-07||-4.92||-4.92||0||NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2012-01-29.102 to 2012-02-06.071."|
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 February '12
Times are UTC for when items were noted or added by The Tracking News.
|1518||Posted Traffic Report|
|1515||Noted that JPL Sentry has updated its 2012 BJ86 risk assessment - see above|
Noted that NEODyS has updated its 2012 BJ86 risk assessment - see above
Noted that JPL Sentry has updated its 2012 CU risk assessment - see above
Noted that NEODyS has updated its 2012 CU risk assessment - see above
Grabbed MPEC 2012-C35 - Daily Orbit Update - see above