Contents on 24 April '13
- Traffic Report -- one object
- IAU Minor Planet Center
- Observers -- thirteen observers
- Impact Risk Monitoring -- two objects
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page (archive)
Of 505 risk-listed objects, 22 have had news in the last 30 days. Updated at 1519 UTC on 24 April.
- 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 24 April '13
One object reported inside ten LD
There is one object reported to be within a radius of ten lunar distances (LD) from Earth today. 2013 GH66 is outbound from 5.80 to 6.14 LD. No other objects are known to be approaching our ten-LD neighborhood until late July.
This report was generated at 1519 UTC.
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 24 April '13
The MPC's NEO Confirmation Page has 4 listings
When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four objects listed. Of these, three were "one nighters." So far The Tracking News has counted a total of sixteen 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 24 April '13
Minor Planet Electronic Circulars
As of last check at 2359 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2013-H41 time-stamped "00:57 UT" - 2013 HV14 - see below
- MPEC 2013-H42 time-stamped "06:03 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K13G03M 2013 GM3 (small asteroid, arc=10 days, H=26.3 ~19m) from Spacewatch via Kitt Peak Natl. Obs. (KPNO) (April 10.14-15p4, 10.30p1 & 11.16p4)
- Observation campaigns (radar support, potential mission destinations)
- G3249 163249 2002 GT (PMD) from Pan-STARRS 1 (PS1) (April 22.60-61p2)
-- Potential mission destinations list & ephemerides + NHATS
- Observations of small asteroids (H>22.0)
- K13H14U 2013 HU14 (arc=2 days, H=24.3 ~47m) from the Siding Spring Survey (SSS) (April 23.55-56p2)
- K13H11O 2013 HO11 (arc=3 days, H=23.0 ~85m) from PS1 (April 22.37p1 & 22.48-49p2)
- K13G69K 2013 GK69 (arc=11 days, H=23.8 ~59m) from Great Shefford Obs. (April 23.87-89p3)
- Observations of other asteroidal objects
- K13H11Q 2013 HQ11 (q=1.616 AU, arc=20 days, H=17.5 ~1.07 km) from the Mt. Lemmon Survey (MLS) (April 2.28-30p3 & 2.37p4) and the Spacewatch 0.9m telescope (April 2.36-37p3)
- K13G80A 2013 GA80 (arc=10 days, H=21.5 ~170m) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (April 24.08-09p5)
- K13G00F 2013 GF (arc=22 days, H=21.3 ~186m) from Astronomical Research Obs. Westfield (April 22.08-09p3) and Desert Moon Obs. (April 23.15-17p2)
- K13D09R 2013 DR9 (Q=5.385 AU, arc=63 days, H=18.1 ~812m) from ARO Westfield (April 22.10-11p3)
- K11W95U 2011 WU95 (arc=2 opp, H=19.2 ~490m) from PS1 (April 23.46-50p4)
- Y1050 341050 2007 HZ from program code "$" (13) via Cerro Paranal (2010 March 8.04p2)
- N0979 230979 2005 AT42 from Cerro Paranal/code "$" (13) (2010 July 14.28-30p8)
- I5853 185853 2000 ER70 from PS1 (April 22.49-53p4)
- G1998 161998 1988 PA from PS1 (April 22.36-37p2 & 22.48-49p2)
- E3637 143637 2003 LP6 from PS1 (April 22.49-52p3)
- 11398 11398 1998 YP11 from Cerro Paranal/code "$" (13) (2009 Nov. 30.34p4)
- 07888 7888 1993 UC from Fabra Obs. (April 20.86-87p3)
MPEC 2013-H41 - "00:57 UT" - 2013 HV14
Observers on 24 April '13
Thirteen observers appear in today's MPECs.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2013-H41 & 2013-H42 -- 2013 HV14, 2013 GF, 2013 DR9|
|309$||program code "$" (13) via Cerro Paranal in Chile, 3 in MPEC 2013-H42 -- 341050, 230979, 11398|
|807|||Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2013-H41 & 2013-H42 -- 2013 HV14, 2013 GA80|
|448||Desert Moon Obs. in New Mexico, 1 in MPEC 2013-H42 -- 2013 GF|
|006||Fabra Obs. in Spain, 1 in MPEC 2013-H42 -- 7888|
|J95||Great Shefford Obs. in England, 2 in MPECs 2013-H41 & 2013-H42 -- 2013 HV14, 2013 GK69|
|695^||Spacewatch via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2013-H42 -- 2013 GM3|
|H01||Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2013-H41 -- 2013 HV14|
|711||McDonald Obs. in Texas, 1 in MPEC 2013-H41 -- 2013 HV14|
|G96||Mt. Lemmon Survey in Arizona, 1 in MPEC 2013-H42 -- 2013 HQ11|
|F51||Pan-STARRS 1 (PS1) in Hawaii, 7 in MPECs 2013-H41 & 2013-H42 -- 2013 HV14, 2013 HO11, 2011 WU95, 185853, 163249, 161998, 143637|
|E12||Siding Spring Survey in New South Wales, 1 in MPEC 2013-H42 -- 2013 HU14|
|691||Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2013-H42 -- 2013 HQ11|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 24 April '13
Notes for Today's Latest Risk Assessments
|2013 HT14||NEODyS||0000||2071-2077||3||1.22e-06||-6.36||-6.49||0||NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2013-04-21.260 to 2013-04-23.276."|
|2013 GM3||JPL Sentry||1516||2028-2113||168||1.8e-04||-4.51||-5.09||0||JPL: "Analysis based on 62 observations spanning 9.9806 days (2013-Apr-03.32112 to 2013-Apr-13.30177)." Diameter approximately 0.019 km. from mean, weighted H=26.2.|
|NEODyS||1516||2028-2090||115||8.53e-05||-4.81||-5.53||0||NEODyS: "Based on 62 optical observations (of which 2 are rejected as outliers) from 2013-04-03.322 to 2013-04-13.303."|
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 24 April '13
Times are UTC for when items were noted or added by The Tracking News.
|1519||Generated Traffic Report|
|1516||Noted that JPL Sentry has updated its 2013 GM3 risk assessment - see above|
Noted that NEODyS has updated its 2013 GM3 risk assessment - see above
Grabbed MPEC 2013-H42 - Daily Orbit Update - see above
|0408||Grabbed MPEC 2013-H41 - 2013 HV14 - see above|