Contents on 22 November '13
- Traffic Report -- three objects
- IAU Minor Planet Center
- Observers -- seven observers
- Impact Risk Monitoring -- thirteen objects
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page (archive)
Of 521 risk-listed objects, 56 have had news in the last 31 days. Updated at 1614 UTC on 22 Nov.
- 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 - (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 22 November '13
Three objects reported inside ten LD
Within ten lunar distances (LD) of Earth there are three objects reported passing today. Radar target 2001 AV43 exits Earth's Hill sphere, traveling from 3.87 to 4.43 LD. More distant, radar target 2013 NJ is inbound from 6.77 to 5.38 LD and 2013 VK13 departs from inside ten LD, moving from 9.87 to 11.35 LD.
This report was generated at 1615 UTC.
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 22 November '13
The MPC's NEO Confirmation Page has 5 listings
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five objects listed. So far The Tracking News has counted a total of six 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 22 November '13
Minor Planet Electronic Circulars
As of last check at 2358 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- Observations of recently (no longer) risk-listed objects
- K13U04Q 2013 UQ4 (i=145.3°, Q=119.999 AU, arc=28 days, H=12.9 ~8.91 km, q=1.081 AU) from program code 8 via Faulkes Telescope South (Nov. 20.45p2)
- Observations of small asteroids (H>22.0)
- K13U03F 2013 UF3 (arc=27 days, H=22.2 ~123m) from Faulkes South/code 8 (Nov. 20.44p2)
- K13N15J 2013 NJ15 (arc=58 days, H=22.8 ~93m) from David Tholen's team on Mauna Kea (Sept. 10.46-47p3 at R=22.6-7)
- Observations of other asteroidal objects
- K13V05O 2013 VO5 (arc=14 days, H=21.3 ~186m) from program code '"' (11) via iTelescope Obs. Nerpio (Nov. 7.10p3)
- K13U03R 2013 UR3 (Q=5.098 AU, arc=30 days, H=17.1 ~1.29 km) from Fabra Obs. (Nov. 21.92-93p3)
- K13T05H 2013 TH5 (Q=4.123 AU, arc=43 days, H=17.5 ~1.07 km) from Purple Mtn. Obs. Xuyi Station (Nov. 14.83-85p2)
- K05R33O 2005 RO33 (arc=2 opp, H=20.1 ~323m) from the Catalina Sky Survey (CSS) (Nov. 9.28-30p4)
- b7732 377732 2005 XJ8 from Astronomical Research Obs. Westfield (Nov. 19.35-36p3)
- a3790 363790 2005 JE46 from Xuyi Sta. (Nov. 14.86-89p3)
- 89355 89355 2001 VS78 from Xuyi Sta. (Nov. 15.85-88p3)
- 08014 8014 1990 MF from Xuyi Sta. (Nov. 21.49-53p3)
- 01943 1943 Anteros (1973 EC) from Xuyi Sta. (Nov. 14.86-89p3)
Observers on 22 November '13
Seven observers appear in today's MPEC.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2013-W09 -- 377732|
|703||Catalina Sky Survey in Arizona, 1 in MPEC 2013-W09 -- 2005 RO33|
|006||Fabra Obs. in Spain, 1 in MPEC 2013-W09 -- 2013 UR3|
|E108||program code 8 via Faulkes Telescope South in New South Wales, 2 in MPEC 2013-W09 -- 2013 UQ4, 2013 UF3|
|5682||David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-W09 -- 2013 NJ15|
|D29||Purple Mtn. Obs. Xuyi Station in China, 5 in MPEC 2013-W09 -- 2013 TH5, 89355, 363790, 8014, 1943|
|I89"||program code '"' (11) via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2013-W09 -- 2013 VO5|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 22 November '13
Notes for Today's Latest Risk Assessments
|2013 VC13||NEODyS||1614||R E M O V E D||-|
|2013 UR1||NEODyS||1614||2050-2067||4||2.03e-06||-6.63||-6.67||0||NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2013-10-23.381 to 2013-10-30.417."|
|2011 BA60||JPL Sentry||0259||2029-2106||17||1.1e-08||-6.24||-6.60||0||JPL: "Analysis based on 7 observations spanning 1.9754 days (2011-Jan-29.26046 to 2011-Jan-31.235902)." Diameter approximately 0.130 km. from mean, weighted H=22.1.|
|2010 XQ||JPL Sentry||0027||2031-2112||49||2.8e-07||-6.57||-7.05||0||JPL: "Analysis based on 15 observations spanning .12618 days (2010-Dec-02.30871 to 2010-Dec-02.43489)." Diameter approximately 0.031 km. from mean, weighted H=25.2.|
|2010 WW8||JPL Sentry||0259||2015-2101||57||6.3e-08||-7.48||-8.23||0||JPL: "Analysis based on 11 observations spanning .06622 days (2010-Nov-30.37333 to 2010-Nov-30.43955)." Diameter approximately 0.020 km. from mean, weighted H=26.1.|
|2010 VQ139||JPL Sentry||0259||2078-2082||2||2.6e-10||-10.47||-10.7||0||JPL: "Analysis based on 11 observations spanning .04669 days (2010-Nov-14.32797 to 2010-Nov-14.37466)." Diameter approximately 0.018 km. from mean, weighted H=26.4.|
|2010 VO139||JPL Sentry||0259||2022-2111||119||2.2e-06||-6.10||-7.09||0||JPL: "Analysis based on 11 observations spanning .19581 days (2010-Nov-14.22693 to 2010-Nov-14.42274)." Diameter approximately 0.017 km. from mean, weighted H=26.5.|
|2008 YC29||JPL Sentry||0534||2095||3||2.8e-08||-7.88||-8.11||0||JPL: "Analysis based on 18 observations spanning .13666 days (2008-Dec-30.42237 to 2008-Dec-30.55903)." Diameter approximately 0.030 km. from mean, weighted H=25.3.|
|2008 VS4||JPL Sentry||0027||2015-2110||254||6.9e-07||-5.42||-6.12||0||JPL: "Analysis based on 10 observations spanning .08330 days (2008-Nov-07.413 to 2008-Nov-07.4963)." Diameter approximately 0.050 km. from mean, weighted H=24.2.|
|2008 VL||JPL Sentry||0259||2021-2093||367||1.1e-05||-6.37||-7.41||0||JPL: "Analysis based on 7 observations spanning .12404 days (2008-Nov-02.31035 to 2008-Nov-02.43439)." Diameter approximately 0.009 km. from mean, weighted H=27.9.|
|2008 JD33||JPL Sentry||0027||2016-2095||28||9.3e-09||-8.44||-8.93||0||JPL: "Analysis based on 13 observations spanning .11183 days (2008-May-15.28689 to 2008-May-15.39872)." Diameter approximately 0.016 km. from mean, weighted H=27.0.|
|2005 GQ33||JPL Sentry||0259||2051-2112||7||4.7e-09||-7.53||-7.93||0||JPL: "Analysis based on 16 observations spanning .71055 days (2005-Apr-06.32956 to 2005-Apr-07.04011)." Diameter approximately 0.062 km. from mean, weighted H=23.7.|
|29075 1950 DA||JPL Sentry||1614||2880||1||4.4e-04||-0.58||-0.58||n/a||JPL: "Analysis based on 8 radar delay, 5 Doppler, and 454 optical observations spanning 22899.0 days (1950-Feb-22.230140 to 2012-Nov-02.272872)." Diameter approximately 1.300 km. from mean, weighted H=17.6.|
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 22 November '13
Times are UTC for when items were noted or added by The Tracking News.
|1902||Grabbed MPEC 2013-W09 - Daily Orbit Update - see above|
|1615||Generated Traffic Report|
|1614||Noted that JPL Sentry has reposted 29075 1950 DA as an impact risk - see above|
Noted that NEODyS has updated its 2013 UR1 risk assessment - see above
Noted that NEODyS has removed 2013 VC13 as an impact risk - see above
|0534||Noted that JPL Sentry has updated its 2008 YC29 risk assessment - see above|
|0259||Noted that JPL Sentry has updated its 2005 GQ33 risk assessment - see above|
Noted that JPL Sentry has updated its 2008 VL risk assessment - see above
Noted that JPL Sentry has updated its 2010 VO139 risk assessment - see above
Noted that JPL Sentry has updated its 2010 VQ139 risk assessment - see above
Noted that JPL Sentry has updated its 2010 WW8 risk assessment - see above
Noted that JPL Sentry has updated its 2011 BA60 risk assessment - see above
|0027||Noted that JPL Sentry has updated its 2008 JD33 risk assessment - see above|
Noted that JPL Sentry has updated its 2008 VS4 risk assessment - see above
Noted that JPL Sentry has updated its 2010 XQ risk assessment - see above