Contents on 11 May '13
- Traffic Report -- one object
- IAU Minor Planet Center
- Observers -- fourteen observers
- Impact Risk Monitoring -- one object
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 1455 UTC on 11 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 11 May '13
One object reported inside ten LD
One asteroid is reported to be inside ten lunar distances (LD) of Earth today. 2013 JR7 is outbound from 9.24 to 9.64 LD.
We reported earlier that no other asteroids were presently known to be coming this close until late July, but then we noticed that new observations of 2009 FE from May 8th reported here (among "other asteroidal objects") have led to an improved orbit calculation that brings it just within ten LD during 2-5 June. It is a fairly good size rock, on the order of 185 meters wide.
This report was updated at 1834 UTC with the return of 2009 FE. Today's first traffic report was generated at 1456 UTC with follow-up in today's DOU MPEC for 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 11 May '13
The MPC's NEO Confirmation Page has 62 listings
When last checked at 2329 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 62 objects listed. Of these, 28 were "one nighters." So far The Tracking News has counted a total of 63 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 11 May '13
Minor Planet Electronic Circulars
As of last check at 2329 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2013-J40 time-stamped "02:50 UT" - Comet C/2013 J3 (McNaught) - see below
- MPEC 2013-J41 time-stamped "06:04 UT" - Daily Orbit Update
- Observations of recently (no longer) risk-listed objects
- K13J01E 2013 JE1 (arc=9 days, H=19.1 ~513m) from Astronomical Research Obs. Westfield (May 9.35-36p4)
- K13G69G 2013 GG69 (Q=4.476 AU, arc=30 days, H=18.6 ~645m) from the Spacewatch 1.8m telescope (May 10.25-27p3)
- Observations of close-passing objects
- K13J01F 2013 JF1 (arc=7 days, H=24.8 ~37m) from ARO Westfield (May 9.34p3)
- Observation campaigns (radar support, potential mission destinations)
- G3249 163249 2002 GT (PMD) from Lumezzane Obs. (May 5.04p2)
-- Potential mission destinations list & ephemerides + NHATS
- Observations of small asteroids (H>22.0)
- K13J04P 2013 JP4 (arc=6 days, H=24.7 ~39m) from ARO Westfield (May 9.18-19p4) and Pan-STARRS 1 (PS1) (May 10.38-43p4)
- K13E28L 2013 EL28 (arc=63 days, H=22.4 ~112m) from PS1 (May 10.39-43p3)
- Observations of other asteroidal objects
- K13J07N 2013 JN7 (arc=3 days, H=20.8 ~234m) from Santa Maria de Montmagastrell Obs. (May 5.98-99p3)
- K13J04O 2013 JO4 (arc=6 days, H=20.4 ~282m) from ARO Westfield (May 9.26p2)
- K13H11R 2013 HR11 (arc=21 days, H=19.5 ~426m) from PS1 (May 10.40-44p4)
- K13G84E 2013 GE84 (arc=26 days, H=19.5 ~426m) from ARO Westfield (May 9.19-20p3)
- K13G79Z 2013 GZ79 (arc=39 days, H=19.8 ~371m) from ARO Westfield (May 9.37-38p3)
- K13G79U 2013 GU79 (arc=26 days, H=21.4 ~178m) from ARO Westfield (May 9.31-32p3)
- K13G73Y 2013 GY73 (arc=29 days, H=18.8 ~589m) from ARO Westfield (May 9.23-25p6)
- K13G68V 2013 GV68 (q=0.225 AU, arc=28 days, H=18.9 ~562m) from ARO Westfield (May 9.21-22p3)
- K13G38U 2013 GU38 (arc=32 days, H=20.5 ~269m) from ARO Westfield (May 9.10-12p4)
- K13G34C 2013 GC34 (Q=4.158 AU, arc=33 days, H=20.7 ~245m) from ARO Westfield (May 9.32-33p3)
- K13F13Y 2013 FY13 (arc=45 days, H=20.5 ~269m) from Lumezzane Obs. (May 5.02p4)
- K13CM2N 2013 CN222 (Q=5.326 AU, arc=84 days, H=18.6 ~645m) from ARO Westfield (May 9.09-11p3)
- K11W95U 2011 WU95 (arc=2 opp, H=19.3 ~467m) from PS1 (May 10.39-43p4)
- K08T04F 2008 TF4 (arc=2 opp, H=19.2 ~490m) from PS1 (May 10.39-44p4)
- K08GB0B 2008 GB110 (i=36.1°, arc=2 opp, H=19.7 ~389m) from Oukaimeden Obs. (May 9.93-99p4)
- K04G28D 2004 GD28 (Q=4.167 AU, arc=4 opp, H=17.2 ~1.23 km) from the Spacewatch 0.9m telescope (May 10.43-46p3)
- K01W02J 2001 WJ2 (arc=4 opp, H=19.8 ~371m) from ARO Westfield (May 9.19-21p4)
- K00W63L 2000 WL63 (arc=3 opp, H=19.9 ~355m) from Lumezzane Obs. (May 5.03p2)
- a0191 360191 1988 TA from Lumezzane Obs. (May 5.01p4)
- Z7005 357005 1999 HA2 from Lumezzane Obs. (May 5.01-02p4)
- E1765 141765 2002 MP3 from ARO Westfield (May 9.27-28p5)
- D6874 136874 1998 FH74 from PS1 (May 10.39-43p4)
- 88710 88710 2001 SL9 from Spacewatch 0.9m (May 10.44-46p3)
- 04015 4015 Wilson-Harrington (1979 VA) from the Siding Spring Survey (SSS) (May 10.63-66p4)
- 03551 3551 Verenia (1983 RD) from ARO Westfield (May 9.29-30p5)
MPEC 2013-J40 - "02:50 UT" - Comet C/2013 J3 (McNaught)
- CK13J030 C/2013 J3 (McNaught) (i=117.3°, q=4.038 AU, TP=2013 May 23.84546 TT) from SSS (May 8.55-57p3, 9.37p2 & 10.52p2), LCOGT Sutherland C (May 8.77-78p8), Cruz del Sur Obs. (May 9.00-04p3 & 9.13p1), Auger Obs. (May 9.01p3), Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (May 9.03-04p3 & 10.96-97p5), Arcadia Obs. (May 9.49-51p4), and program code 1 via iTelescope Obs. Siding Spring (May 9.57-58p3)
Observers on 11 May '13
Fourteen observers appear in today's MPECs.
|Code||Observer / observatory|
|E23||Arcadia Obs. in New South Wales, 1 in MPEC 2013-J40 -- C/2013 J3|
|H21||Astronomical Research Obs. Westfield in Illinois, 15 in MPEC 2013-J41 -- 2013 JP4, 2013 JO4, 2013 JF1, 2013 JE1, 2013 GZ79, 2013 GY73, 2013 GV68, 2013 GU79, 2013 GU38, 2013 GE84, 2013 GC34, 2013 CN222, 2001 WJ2, 141765, 3551|
|I47||Auger Obs. in Argentina, 1 in MPEC 2013-J40 -- C/2013 J3|
|807|||Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2013-J40 -- C/2013 J3|
|I39||Cruz del Sur Obs. in Argentina, 1 in MPEC 2013-J40 -- C/2013 J3|
|K93||LCOGT Sutherland C in South Africa, 1 in MPEC 2013-J40 -- C/2013 J3|
|130||Lumezzane Obs. in Italy, 5 in MPEC 2013-J41 -- 2013 FY13, 2000 WL63, 360191, 357005, 163249|
|J43||Oukaimeden Obs. in Morocco, 1 in MPEC 2013-J41 -- 2008 GB110|
|F51||Pan-STARRS 1 (PS1) in Hawaii, 6 in MPEC 2013-J41 -- 2013 JP4, 2013 HR11, 2013 EL28, 2011 WU95, 2008 TF4, 136874|
|B74||Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2013-J41 -- 2013 JN7|
|E12||Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2013-J40 & 2013-J41 -- C/2013 J3, 4015|
|691||Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2013-J41 -- 2004 GD28, 88710|
|291||Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2013-J41 -- 2013 GG69|
|Q621||program code 1 via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-J40 -- C/2013 J3|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 11 May '13
Notes for Today's Latest Risk Assessments
|2013 JM14||NEODyS||1455||2021-2087||22||3.68e-09||-6.32||-6.59||0||NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2013-05-09.350 to 2013-05-10.396."|
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 11 May '13
Times are UTC for when items were noted or added by The Tracking News.
|1834||Updated Traffic Report|
|1455||Noted that NEODyS has posted 2013 JM14 as an impact risk - see above|
Grabbed MPEC 2013-J41 - Daily Orbit Update - see above
|0434||Grabbed MPEC 2013-J40 - Comet C/2013 J3 (McNaught) - see above|