Contents on 16 January '12
- Traffic Report -- two objects
- IAU Minor Planet Center
- Observers -- eighteen observers
- Impact Risk Monitoring -- three objects
- Consolidated Risk Tables - the CRT page (archive)
Of 424 risk-listed objects, 20 have had news in the last 31 days. Updated at 1604 UTC on 16 Jan.
- Earth's Busy Neighborhood close passer EBN Traffic Report
Two objects are known to be within ten LD of Earth today. Updated at 1707 UTC on 16 Jan.
- 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 8 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 16 January '12
Two objects reported inside ten LD
Two objects are reported passing within ten lunar distances (LD) of our planet today. 2012 AQ10 comes its closest to Earth on this passage -- 2.24 LD at 1252 UTC, and its closest to the Moon -- 2.08 LD at 2134 UTC. And radar target 2011 YH40 comes its closest to Earth this time around -- 5.36 LD at 1736 UTC.
Headed our way, radar target 2011 CP4 arrives inside ten LD on February 22nd.
This report was updated at 1656 UTC with follow-up in today's DOU MPEC for 2012 AQ10 and 2011 YH40, and for departed 2012 AW10 and 2012 AP10.
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 16 January '12
The MPC's NEO Confirmation Page has 9 listings
When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had nine objects listed. Of these, two were "one nighters." So far The Tracking News has counted a total of fourteen 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 16 January '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
- K12A10S 2012 AS10 (arc=5 days, H=17.0 ~1.35 km) from Astronomical Research Obs. Westfield (Jan. 15.19-21p3) and Great Shefford Obs. (Jan. 15.88p1 & 15.92p1)
- K12A10P 2012 AP10 (small asteroid, arc=5 days, H=26.2 ~19m, close passer) from Great Shefford Obs. (Jan. 15.85-87p3)
- K11Y28H 2011 YH28 (Q=4.489 AU, arc=19 days, H=20.4 ~282m) from San Marcello Pistoiese Obs. (Jan. 15.02-03p3) and Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Jan. 15.35-37p4)
- Observations of close-passing objects
- K12A10W 2012 AW10 (arc=1 day, H=25.7 ~25m, close passer) from ARO Westfield (Jan. 15.26-27p3)
- K12A10Q 2012 AQ10 (arc=3 days, H=26.7 ~15m, close passer) from Schiaparelli Obs. (Jan. 14.93p5), ARO Westfield (Jan. 15.25-26p6), North Obs. (Jan. 15.91p5), and Great Shefford Obs. (Jan. 15.94-98p6 & 16.05-06p2)
- K11Y40H 2011 YH40 (arc=18 days, H=23.0 ~85m, close passer, radar support) from Schiaparelli Obs. (Jan. 14.98p5), ARO Westfield (Jan. 15.24-26p6), Vicksburg Obs. (Jan. 15.39-40p4), New Millennium Obs. (Jan. 15.93p11), and Great Shefford Obs. (Jan. 16.09-10p3)
- Observation campaigns (radar support, potential mission destinations)
- H5706 175706 1996 FG3 (PMD) from Schiaparelli Obs. (Jan. 14.97p1, 15.02p1 & 15.07p1)
- F2671 152671 1998 HL3 (PMD) from Herrenberg Obs. (Jan. 15.75-78p6)
- D8911 138911 2001 AE2 (PMD) from Oukaimeden Obs. (Jan. 14.03-07p4)
- 29075 29075 1950 DA (radar) from Schiaparelli Obs. (Jan. 15.03-04p3)
- 00433 433 Eros (1898 DQ) (radar) from Vicksburg Obs. (Jan. 15.40-41p3)
-- Potential mission destinations list & ephemerides -- Planetary radar schedules: Arecibo & Goldstone
- Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
- K12A10N 2012 AN10 (arc=4 days, H=22.5 ~107m) from Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) (Jan. 11.07p3)
- K12A10M 2012 AM10 (arc=5 days, H=22.8 ~93m) from ARO Westfield (Jan. 15.28p3)
- K12A03A 2012 AA3 (arc=13 days, H=22.4 ~112m) from ARO Westfield (Jan. 15.28p3)
- K12A00Y 2012 AY (arc=13 days, H=22.4 ~112m) from ARO Westfield (Jan. 15.22-23p6)
- K12A00W 2012 AW (arc=14 days, H=22.1 ~129m) from ARO Westfield (Jan. 15.18-20p3)
- K11Y28Z 2011 YZ28 (arc=18 days, H=22.5 ~107m) from San Marcello Pistoiese Obs. (Jan. 15.85p2)
- K12A11B 2012 AB11 (arc=2 days, H=22.0 ~135m) from LINEAR (Jan. 15.34-39p5)
- Observations of other asteroidal objects
- K12A11A 2012 AA11 (arc=2 days, H=20.1 ~323m) from St. Pardon de Conques Obs. (Jan. 15.90-94p3)
- K12A01E 2012 AE1 (arc=14 days, H=18.9 ~562m) from ARO Westfield (Jan. 15.23-24p6)
- K11Y15V 2011 YV15 (Q=4.392 AU, arc=53 days, H=17.1 ~1.29 km) from Vicksburg Obs. (Jan. 15.42-44p4)
- K11X03O 2011 XO3 (Q=5.385 AU, arc=46 days, H=16.8 ~1.48 km) from Castelmartini Obs. (Jan. 15.89p3)
- K11X01E 2011 XE1 (arc=43 days, H=18.1 ~812m) from DGRO-RH (Jan. 14.13p3)
- K11WD4V 2011 WV134 (Q=4.676 AU, arc=2 opp, H=17.1 ~1.29 km) from Eschenberg Obs. (Jan. 15.79p3)
- K11W96A 2011 WA96 (arc=46 days, H=20.3 ~295m) from Holmes/CTIO (Jan. 15.18-23p3)
- K11V05W 2011 VW5 (arc=73 days, H=18.6 ~645m) from ARO Westfield (Jan. 15.26-27p3)
- K11S69R 2011 SR69 (arc=112 days, H=20.1 ~323m) from Schiaparelli Obs. (Jan. 12.98-99p3)
- K11Q14F 2011 QF14 (arc=142 days, H=18.8 ~589m) from Schiaparelli Obs. (Jan. 11.82-84p2)
- K11F02Z 2011 FZ2 (Q=4.760 AU, arc=2 opp, H=17.3 ~1.17 km) from Schiaparelli Obs. (Jan. 12.82-84p2)
- K08W13Z 2008 WZ13 (arc=2 opp, H=18.5 ~676m) from Eschenberg Obs. (Jan. 15.77-78p8)
- K06W03N 2006 WN3 (arc=2 opp, H=19.8 ~371m) from Holmes/CTIO (Jan. 15.35-36p4)
- K06M10J 2006 MJ10 (i=39.3°, arc=4 opp, H=18.6 ~645m) from LINEAR (Jan. 15.30-32p3)
- K03A23F 2003 AF23 (arc=2 opp, H=20.9 ~224m) from DGRO-RH (Jan. 14.12p3), Eschenberg Obs. (Jan. 15.82-83p7), San Marcello Pistoiese Obs. (Jan. 15.83-84p2), and New Millennium Obs. (Jan. 15.91-92p6)
- K02A00C 2002 AC (arc=3 opp, H=17.9 ~891m) from Schiaparelli Obs. (Jan. 11.97-99p2)
- V2473 312473 2008 SX245 from Los Molinos Obs. (Jan. 15.27-28p3)
- N7805 237805 2002 CF26 from LINEAR (Jan. 15.41-46p4)
- M5586 225586 2000 WS67 from Herrenberg Obs. (Jan. 15.81-82p4)
- 85989 85989 1999 JD6 from NEAT's USAF Haleakala telescope (2005 July 24.26-28p3)
- 85839 85839 1998 YO4 from LINEAR (Jan. 15.28-32p3)
- 25916 25916 2001 CP44 from Pan-STARRS 1 (PS1) (Jan. 15.52-53p2)
Observers on 16 January '12
Eighteen observers appear in today's MPEC.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 10 in MPEC 2012-B01 -- 2012 AY, 2012 AW10, 2012 AW, 2012 AS10, 2012 AQ10, 2012 AM10, 2012 AE1, 2012 AA3, 2011 YH40, 2011 VW5|
|160||Castelmartini Obs. in Italy, 1 in MPEC 2012-B01 -- 2011 XO3|
|807|||Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPEC 2012-B01 -- 2011 YH28, 2011 WA96, 2006 WN3|
|G48||Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 3 in MPEC 2012-B01 -- 2012 AN10, 2011 XE1, 2003 AF23|
|151||Eschenberg Obs. in Switzerland, 3 in MPEC 2012-B01 -- 2011 WV134, 2008 WZ13, 2003 AF23|
|J95||Great Shefford Obs. in England, 4 in MPEC 2012-B01 -- 2012 AS10, 2012 AQ10, 2012 AP10, 2011 YH40|
|240||Herrenberg Obs. in Germany, 2 in MPEC 2012-B01 -- 225586, 152671|
|704||LINEAR in New Mexico, 4 in MPEC 2012-B01 -- 2012 AB11, 2006 MJ10, 85839, 237805|
|844||Los Molinos Obs. in Uruguay, 1 in MPEC 2012-B01 -- 312473|
|608||NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2012-B01 -- 85989|
|A24||New Millennium Obs. in Italy, 2 in MPEC 2012-B01 -- 2011 YH40, 2003 AF23|
|J69||North Obs. in England, 1 in MPEC 2012-B01 -- 2012 AQ10|
|J43||Oukaimeden Obs. in Morocco, 1 in MPEC 2012-B01 -- 138911|
|F51||Pan-STARRS 1 in Hawaii, 1 in MPEC 2012-B01 -- 25916|
|104||San Marcello Pistoiese Obs. in Italy, 3 in MPEC 2012-B01 -- 2011 YZ28, 2011 YH28, 2003 AF23|
|204||Schiaparelli Obs. in Italy, 8 in MPEC 2012-B01 -- 2012 AQ10, 2011 YH40, 2011 SR69, 2011 QF14, 2011 FZ2, 2002 AC, 29075, 175706|
|I93||St. Pardon de Conques Obs. in France, 1 in MPEC 2012-B01 -- 2012 AA11|
|H47||Vicksburg Obs. in Mississippi, 3 in MPEC 2012-B01 -- 2011 YV15, 2011 YH40, 433|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 16 January '12
Notes for Today's Latest Risk Assessments
|2012 AS10||JPL Sentry||1602||R E M O V E D||JPL: Risk listing removed at 0852 UTC.|
|2012 AP10||JPL Sentry||1602||2062-2111||95||1.4e-04||-4.83||-5.55||0||JPL: "Analysis based on 43 observations spanning 4.7847 days (2012-Jan-11.08359 to 2012-Jan-15.86831)." Diameter approximately 0.019 km. from mean, weighted H=26.3.|
|2011 YH28||JPL Sentry||1602||R E M O V E D||JPL: Risk listing removed at 0849 UTC.|
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 16 January '12
Times are UTC for when items were noted or added by The Tracking News.
|1656||Updated Traffic Report|
|1602||Noted that JPL Sentry has removed 2011 YH28 as an impact risk - see above|
Noted that JPL Sentry has updated its 2012 AP10 risk assessment - see above
Noted that JPL Sentry has removed 2012 AS10 as an impact risk - see above
Grabbed MPEC 2012-B01 - Daily Orbit Update - see above