Contents on 16 May '13
- Traffic Report -- one object
- IAU Minor Planet Center
- Observers -- twelve observers
- Impact Risk Monitoring -- two objects
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page (archive)
Of 507 risk-listed objects, 23 have had news in the last 31 days. Updated at 1238 UTC on 16 May.
- 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 20 Feb.
- 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 May '13
One object reported inside ten LD
One visitor is reported traveling within ten lunar distances (LD) of our planet today. Risk-listed 2013 JM22 comes its closest to Earth this time around, reaching 7.90 LD at 1411 UT. Approaching ten LD next, 2009 FE arrives on June 2nd.
This report was generated at 1241 UTC with follow-up in today's DOU MPEC for 2013 JM22 and departed 2013 JF1.
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 16 May '13
The MPC's NEO Confirmation Page has 55 listings
When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 55 objects listed. Of these, nineteen were "one nighters." So far The Tracking News has counted a total of 65 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 May '13
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
- K13J22M 2013 JM22 (small asteroid, q=0.355 AU, Q=4.175 AU, arc=4 days, H=23.3 ~74m, close passer) from Schwarzschild Obs. (May 15.01-02p4) and Great Shefford Obs. (May 15.90p4 & 16.11-12p4)
- Observations of close-passing objects
- K13J01F 2013 JF1 (arc=13 days, H=24.9 ~35m) from Pan-STARRS 1 (PS1) (May 15.50-54p4)
- Observations of other asteroidal objects
- K13J22L 2013 JL22 (arc=3 days, H=21.1 ~204m) from Schwarzschild Obs. (May 14.87-88p2 & 14.92p2) and Astronomical Research Obs. Westfield (May 15.09-10p4)
- K13J04O 2013 JO4 (arc=12 days, H=20.4 ~282m) from Sandlot Obs. (May 11.13-14p3) and Estrella de Mar Obs. (May 15.00-07p3)
- K13E20M 2013 EM20 (arc=3 opp, H=19.8 ~371m) from ARO Westfield (May 15.11-14p3 at V=22.2)
- K10G62W 2010 GW62 (arc=3 opp, H=19.4 ~446m) from the Spacewatch 1.8m telescope (May 15.39-40p3)
- K02G00S 2002 GS (arc=4 opp, H=19.9 ~355m) from the Catalina Sky Survey (CSS) (May 15.15-17p4)
- Z7005 357005 1999 HA2 from the Palomar Transient Factory (PTF) (May 13.34p1 & 13.43-46p2)
- O2643 242643 2005 NZ6 from Fabra Obs. (May 13.87-88p3)
- E1495 141495 2002 EZ11 from the Mt. Lemmon Survey (MLS) (May 15.25-27p4)
- D7170 137170 1999 HF1 from Elche Obs. (May 10.85p3)
- D7044 137044 1998 UC50 from CSS (May 15.28-30p4)
- 89958 89958 2002 LY45 from CSS (May 15.17-20p4)
- 11405 11405 1999 CV3 from Elche Obs. (May 10.84p3) and ARO Westfield (May 15.08-10p5)
- 07839 7839 1994 ND from CSS (May 15.39-42p4)
Observers on 16 May '13
Twelve observers appear in today's MPEC.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 3 in MPEC 2013-K01 -- 2013 JL22, 2013 EM20, 11405|
|703||Catalina Sky Survey (CSS) in Arizona, 4 in MPEC 2013-K01 -- 2002 GS, 89958, 137044, 7839|
|I57||Elche Obs., 2 in MPEC 2013-K01 -- 137170, 11405|
|Z81||Estrella de Mar Obs., 1 in MPEC 2013-K01 -- 2013 JO4|
|006||Fabra Obs. in Spain, 1 in MPEC 2013-K01 -- 242643|
|J95||Great Shefford Obs. in England, 1 in MPEC 2013-K01 -- 2013 JM22|
|G96||Mt. Lemmon Survey in Arizona, 1 in MPEC 2013-K01 -- 141495|
|I41||Palomar Transient Factory in southern California, 1 in MPEC 2013-K01 -- 357005|
|F51||Pan-STARRS 1 in Hawaii, 1 in MPEC 2013-K01 -- 2013 JF1|
|H36||Sandlot Obs. in Kansas, 1 in MPEC 2013-K01 -- 2013 JO4|
|033||Schwarzschild Obs. in Germany, 2 in MPEC 2013-K01 -- 2013 JM22, 2013 JL22|
|291||Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2013-K01 -- 2010 GW62|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 16 May '13
Notes for Today's Latest Risk Assessments
|2013 JR28||NEODyS||1236||2047-2101||11||1.0e-08||-6.08||-6.61||0||NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2013-05-12.434 to 2013-05-14.940."|
|2013 JM22||NEODyS||1236||R E M O V E D||-|
|JPL Sentry||1236||2095||1||1.8e-08||-6.64||-6.64||0||JPL: "Analysis based on 61 observations spanning 3.7723 days (2013-May-12.34486 to 2013-May-16.117174)." Diameter approximately 0.077 km. from mean, weighted H=23.2.|
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 May '13
Times are UTC for when items were noted or added by The Tracking News.
|1241||Generated Traffic Report|
|1236||Noted that JPL Sentry has updated its 2013 JM22 risk assessment - see above|
Noted that NEODyS has removed 2013 JM22 as an impact risk - see above
Noted that NEODyS has posted 2013 JR28 as an impact risk - see above
Grabbed MPEC 2013-K01 - Daily Orbit Update - see above