Contents on 20 October '13
- Traffic Report -- one object
- IAU Minor Planet Center
- Observers -- eighteen observers
- Impact Risk Monitoring -- two objects
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page (archive)
Of 512 risk-listed objects, 18 have had news in the last 31 days. Updated at 1547 UTC on 20 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 - last updated 20 Feb. (discontinued)
- 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 20 October '13
One object reported inside ten LD
One object is reported moving within ten lunar distances (LD) of our planet today. Within Earth's Hill sphere, risk-listed radar target 2013 UB is outbound from 1.92 to 3.23 LD.
Radar target 2001 AV43 arrives inside ten LD on November 6th and radar target 2013 NJ comes in on November 19th.
This report was generated at 1550 UTC with follow-up in today's DOU MPEC for 2013 UB and departed 2013 TG6.
Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Earth's Hill sphere (of gravitational influence) is estimated to extend out to around 3.89 LD. 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 20 October '13
The MPC's NEO Confirmation Page has 10 listings
When last checked at 2145 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had ten objects listed. Of these, seven 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 20 October '13
Minor Planet Electronic Circulars
As of last check at 2154 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
- K13U00B 2013 UB (small asteroid, arc=4 days, H=26.6 ~16m, close passer, radar support) from Tenagra II Obs. (Oct. 19.08p3 & 19.16p3) and Great Shefford Obs. (Oct. 19.76-85p11)
- K13TD5V 2013 TV135 (arc=11 days, H=19.5 ~426m) from program code 4 via Slooh.com Canary Islands Obs. (Oct. 19.13-16p6), Wiggins Obs. (Oct. 19.18-19p4), Magdalena Ridge Obs. (MRO) (Oct. 19.28-36p5), Chabot Obs. (Oct. 19.28-32p6), ISON-NM Obs. (Oct. 19.28-41p6 & 19.46-49p2), program code 8 via iTelescope Obs. Mayhill (Oct. 19.38-39p6), Sandlot Obs. (Oct. 19.41-42p3), and Nonndorf Obs. (Oct. 19.92-95p3)
- Observations of close-passing objects
- K13T06G 2013 TG6 (arc=7 days, H=26.6 ~16m) from Astronomical Research Obs. Westfield (Oct. 10.07-09p3)
- Observation campaigns (radar support, potential mission destinations)
- Z0751 350751 2002 AW (PMD) from Desert Moon Obs. (Oct. 19.13-14p5) and Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) (Oct. 20.14p3)
-- Potential mission destinations list & ephemerides + NHATS -- Planetary radar schedules: Arecibo & Goldstone
- Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
- K13T69H 2013 TH69 (arc=11 days, H=24.2 ~49m) from DGRO-RH (Oct. 7.14-15p3) and ARO Westfield (Oct. 10.25-26p3)
- K13T06B 2013 TB6 (arc=12 days, H=22.6 ~102m) from ARO Westfield (Oct. 10.35p3)
- K13T05X 2013 TX5 (arc=13 days, H=23.0 ~85m) from ARO Westfield (Oct. 10.10-11p3)
- K13S00R 2013 SR (arc=27 days, H=24.1 ~51m) from Tenagra II Obs. (Oct. 20.20-21p3)
- K13R21L 2013 RL21 (arc=40 days, H=23.7 ~62m) from ARO Westfield (Oct. 10.15-17p3)
- K13N00W 2013 NW (Q=4.701 AU, arc=102 days, H=22.3 ~117m) from Mark Trueblood via Kitt Peak Natl. Obs. (KPNO) (Oct. 12.46-47p4)
- K13T06F 2013 TF6 (arc=8 days, H=21.8 ~148m) from ARO Westfield (Oct. 10.18-21p3)
- K13T06E 2013 TE6 (arc=13 days, H=21.8 ~148m) from ARO Westfield (Oct. 10.21-22p3)
- K13T06D 2013 TD6 (arc=13 days, H=22.0 ~135m) from ARO Westfield (Oct. 10.23-25p3)
- Observations of other asteroidal objects
- K13T69L 2013 TL69 (arc=13 days, H=21.3 ~186m) from Tenagra II Obs. (Oct. 20.18-19p3)
- K13T05Z 2013 TZ5 from ARO Westfield (Oct. 10.26-27p3 & 12.24-25p3)
- K13T04S 2013 TS4 (arc=13 days, H=20.8 ~234m) from ARO Westfield (Oct. 10.33-34p3)
- K13S24R 2013 SR24 (arc=22 days, H=20.6 ~257m) from Tenagra II Obs. (Oct. 20.15-17p3)
- K13O00G 2013 OG (arc=88 days, H=20.6 ~257m) from ARO Westfield (Oct. 10.12-14p3)
- K10U95X 2010 UX95 (arc=2 opp, H=19.3 ~467m) from Tenagra II Obs. (Oct. 20.16-18p3)
- K10G06Y 2010 GY6 (arc=2 opp, H=19.3 ~467m) from DGRO-RH (Oct. 20.12p3)
- K08H03O 2008 HO3 (Q=4.803 AU, arc=2 opp, H=18.1 ~812m) from DGRO-RH (Oct. 20.11p4) and Jana Pittichova via Table Mtn. Obs. (Oct. 20.21p2)
- K08F06T 2008 FT6 (arc=4 opp, H=17.4 ~1.12 km) from Tenagra II Obs. (Oct. 19.47-50p3)
- K07X09Y 2007 XY9 (arc=3 opp, H=21.0 ~214m) from SONEAR Obs. (July 14.16p3)
- K05R06Q 2005 RQ6 (arc=3 opp, H=18.9 ~562m) from Tenagra II Obs. (Oct. 19.34-37p3)
- b5103 375103 2007 TD71 from ARO Westfield (Oct. 14.37-38p3)
- b4038 374038 2004 HW from the Mt. Lemmon Survey (MLS) (Oct. 16.45-46p4)
- Z1278 351278 2004 SB20 from Desert Moon Obs. (Oct. 19.31-32p3)
- P0620 250620 2005 GE59 from Desert Moon Obs. (Oct. 19.10-12p5)
- G2980 162980 2001 RR17 from Desert Moon Obs. (Oct. 19.41-43p4)
- G2149 162149 1998 YQ11 from ISON-Kislovodsk Obs. (Oct. 10.82-86p4)
- 39565 39565 1992 SL from SONEAR Obs. (Sept. 10.09p3)
Observers on 20 October '13
Eighteen observers appear in today's MPEC.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 12 in MPEC 2013-U15 -- 2013 TZ5, 2013 TX5, 2013 TS4, 2013 TH69, 2013 TG6, 2013 TF6, 2013 TE6, 2013 TD6, 2013 TB6, 2013 RL21, 2013 OG, 375103|
|G58||Chabot Obs. in northern California, 1 in MPEC 2013-U15 -- 2013 TV135|
|448||Desert Moon Obs. in New Mexico, 4 in MPEC 2013-U15 -- 351278, 350751, 250620, 162980|
|G48||Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 4 in MPEC 2013-U15 -- 2013 TH69, 2010 GY6, 2008 HO3, 350751|
|J95||Great Shefford Obs. in England, 1 in MPEC 2013-U15 -- 2013 UB|
|D00||ISON-Kislovodsk Obs., 1 in MPEC 2013-U15 -- 162149|
|H15||ISON-NM Obs. in New Mexico, 1 in MPEC 2013-U15 -- 2013 TV135|
|695]||Mark Trueblood via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2013-U15 -- 2013 NW|
|H01||Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2013-U15 -- 2013 TV135|
|G96||Mt. Lemmon Survey in Arizona, 1 in MPEC 2013-U15 -- 374038|
|C47||Nonndorf Obs. in Austria, 1 in MPEC 2013-U15 -- 2013 TV135|
|Y00||SONEAR Obs. in Brazil, 2 in MPEC 2013-U15 -- 2007 XY9, 39565|
|H36||Sandlot Obs. in Kansas, 1 in MPEC 2013-U15 -- 2013 TV135|
|G404||program code 4 via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2013-U15 -- 2013 TV135|
|673!||Jana Pittichova via Table Mtn. Obs. in southern California, 1 in MPEC 2013-U15 -- 2008 HO3|
|926||Tenagra II Obs. in Arizona, 7 in MPEC 2013-U15 -- 2013 UB, 2013 TL69, 2013 SR24, 2013 SR, 2010 UX95, 2008 FT6, 2005 RQ6|
|718||Wiggins Obs. in Utah, 1 in MPEC 2013-U15 -- 2013 TV135|
|H068||program code 8 via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-U15 -- 2013 TV135|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 20 October '13
Notes for Today's Latest Risk Assessments
|2013 UB||NEODyS||1546||2108-2111||2||1.19e-08||-9.12||-9.14||0||NEODyS: "Based on 71 optical observations (of which 4 are rejected as outliers) from 2013-10-16.256 to 2013-10-19.851."|
|JPL Sentry||1546||R E M O V E D||JPL: Risk listing removed at 1216 UTC.|
|2013 TV135||NEODyS||1546||2032-2047||2||1.35e-04||-0.86||-0.86||1||NEODyS: "Based on 129 optical observations (of which 2 are rejected as outliers) from 2013-10-08.856 to 2013-10-19.953."|
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 20 October '13
Times are UTC for when items were noted or added by The Tracking News.
|1550||Generated Traffic Report|
|1546||Noted that NEODyS has updated its 2013 TV135 risk assessment - see above|
Noted that JPL Sentry has removed 2013 UB as an impact risk - see above
Noted that NEODyS has updated its 2013 UB risk assessment - see above
Grabbed MPEC 2013-U15 - Daily Orbit Update - see above