Contents on 27 March '13
- Traffic Report -- five objects
- IAU Minor Planet Center
- Observers -- eleven observers
- Impact Risk Monitoring -- two objects
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page (archive)
Of 500 risk-listed objects, 265 have had news in the last 31 days. Updated at 1420 UTC on 27 March.
- 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 27 March '13
Five objects reported inside ten LD
Five visitors are reported to be within ten lunar distances (LD) of our planet today. Risk-listed 2013 EL89 is inbound from 7.49 to 6.03 LD and radar target 2013 FB8 from 7.71 to 6.31 LD. 2013 FD8 comes its closest to Earth this time around, reaching 8.44 LD at 1420 UT. 2013 FG is outbound from 6.69 to 8.48 LD and risk-listed 2013 FU13 leaves ten LD, moving from 9.7 to 11.0 LD*.
Coming toward Earth next, risk-listed 2010 GM23 arrives inside ten LD on April 10th.
This report was generated at 1421 UTC with follow-up in today's DOU MPEC for 2013 FB8 and observation of distant 68216 2001 CV26.
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. "LD*" indicates some passage uncertainty. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.
NEOCP Activity on 27 March '13
The MPC's NEO Confirmation Page has 3 listings
When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three objects listed. Of these, one was a "one nighter."
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 27 March '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
- K13F13W 2013 FW13 (almost small, arc=3 days, H=21.8 ~148m) from McDonald Obs. (March 26.47-48p4)
- Observations of recently (no longer) risk-listed objects
- K13EA8V 2013 EV108 (arc=17 days, H=20.6 ~257m) from Desert Moon Obs. (March 26.28-29p4) and Petit Jean Mtn. South Obs. (PJMSO) (March 26.30-31p10)
- Observations of close-passing objects
- K13F08B 2013 FB8 (arc=7 days, H=25.0 ~34m, radar support) from program code "~" (34) via Cerro Tololo Inter-American Obs. (CTIO) (March 26.19-25p10), Desert Moon Obs. (March 26.31-33p5), McDonald Obs. (March 26.32-34p15), and PJMSO (March 26.32-33p15)
- 68216 68216 2001 CV26 from New Millennium Obs. (March 20.94p2 & 20.98-00p4)
- Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
- K13F08C 2013 FC8 (arc=7 days, H=22.6 ~102m) from PJMSO (March 26.29-30p10)
- K13E00A 2013 EA (arc=25 days, H=21.9 ~141m) from PJMSO (March 26.31-32p8)
- K01T02A 2001 TA2 (arc=2 opp, H=21.9 ~141m) from PJMSO (March 26.34p8)
- Observations of other asteroidal objects
- K13F13Y 2013 FY13 (arc=2 days, H=20.5 ~269m) from Arcadia Obs. (March 26.43-48p5) and Ernesto Guido via Faulkes Telescope South (March 26.52-53p4)
- K13F13X 2013 FX13 (q=0.369 AU, arc=2 days, H=21.1 ~204m) from McDonald Obs. (March 26.42-43p4)
- K09S15C 2009 SC15 (arc=3 opp, H=21.4 ~178m) from Desert Moon Obs. (March 26.21-22p5)
- K09B02L 2009 BL2 (arc=2 opp, H=19.4 ~446m) from Wishing Star Obs. (March 27.05-06p3)
- K02J15W 2002 JW15 (arc=5 opp, H=20.1 ~323m) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (March 26.12p3)
- R7142 277142 2005 LG8 from CTIO/code "~" (34) (March 23.15-40p12)
- L4869 214869 2007 PA8 from New Millennium Obs. (March 20.93-97p4)
- F3249 153249 2001 BW15 from Desert Moon Obs. (March 26.12-19p3)
- F2952 152952 2000 GC2 from New Millennium Obs. (March 20.93-97p4) and Desert Moon Obs. (March 26.25-26p4)
- D7199 137199 1999 KX4 from iTelescope Obs. Nerpio (March 23.18-19p12)
- 96315 96315 1997 AP10 from Geyserland Obs. (March 26.37-39p9)
- 66008 66008 1998 QH2 from Wishing Star Obs. (March 27.00-01p3)
- 08176 8176 1991 WA from Tenagra II Obs. (March 26.30-33p3)
- 05828 5828 1991 AM from New Millennium Obs. (March 20.92-98p8)
- 05645 5645 1990 SP from New Millennium Obs. (March 21.01p2)
- 03752 3752 Camillo (1985 PA) from New Millennium Obs. (March 21.01p2)
- 02329 2329 Orthos (1976 WA) from New Millennium Obs. (March 20.93-98p5)
- 01864 1864 Daedalus (1971 FA) from New Millennium Obs. (March 20.92-97p8)
Observers on 27 March '13
Eleven observers appear in today's MPEC.
|Code||Observer / observatory|
|E23||Arcadia Obs. in New South Wales, 1 in MPEC 2013-F55 -- 2013 FY13|
|807|||Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2013-F55 -- 2002 JW15|
|807~||program code "~" (34) via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPEC 2013-F55 -- 2013 FB8, 277142|
|448||Desert Moon Obs. in New Mexico, 5 in MPEC 2013-F55 -- 2013 FB8, 2013 EV108, 2009 SC15, 153249, 152952|
|E102||Ernesto Guido in Italy via Faulkes Telescope South in New South Wales, 1 in MPEC 2013-F55 -- 2013 FY13|
|E89||Geyserland Obs. in New Zealand, 1 in MPEC 2013-F55 -- 96315|
|711||McDonald Obs. in Texas, 3 in MPEC 2013-F55 -- 2013 FX13, 2013 FW13, 2013 FB8|
|A24||New Millennium Obs. in Italy, 8 in MPEC 2013-F55 -- 68216, 214869, 152952, 5828, 5645, 3752, 2329, 1864|
|H45||Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2013-F55 -- 2013 FC8, 2013 FB8, 2013 EV108, 2013 EA, 2001 TA2|
|926||Tenagra II Obs. in Arizona, 1 in MPEC 2013-F55 -- 8176|
|I15||Wishing Star Obs. in Rhode Island, 2 in MPEC 2013-F55 -- 2009 BL2, 66008|
|I89||iTelescope Obs. Nerpio in Spain, 1 in MPEC 2013-F55 -- 137199|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 27 March '13
Notes for Today's Latest Risk Assessments
|2013 FW13||JPL Sentry||1420||2032-2098||4||9.0e-10||-7.30||-7.75||0||JPL: "Analysis based on 28 observations spanning 3.0101 days (2013-Mar-23.47435 to 2013-Mar-26.48444)." Diameter approximately 0.160 km. from mean, weighted H=21.6.|
|2013 EH68||NEODyS||1420||2095-2095||1||3.73e-08||-6.32||-6.32||0||NEODyS: "Based on 57 optical observations (of which 0 are rejected as outliers) from 2013-03-13.469 to 2013-03-22.346."|
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 27 March '13
Times are UTC for when items were noted or added by The Tracking News.
|1421||Generated Traffic Report|
|1420||Noted that NEODyS has updated its 2013 EH68 risk assessment - see above|
Noted that JPL Sentry has updated its 2013 FW13 risk assessment - see above
Grabbed MPEC 2013-F55 - Daily Orbit Update - see above