Contents on 28 September '12
- Traffic Report -- two objects
- IAU Minor Planet Center
- Observers -- fourteen observers
- Impact Risk Monitoring -- nothing to report
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page (archive)
Of 445 risk-listed objects, 14 have had news in the last 30 days. Updated at 1525 UTC on 28 Sept.
- 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 14 Sept.
- 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 28 September '12
Two objects reported inside ten LD
There are two asteroids reported traveling inside ten lunar distances (LD) of our planet today. Inside Earth's Hill sphere, risk-listed 2012 SY49 comes its closest to Earth this time around, reaching 2.61 LD at 0104 UTC, and 2012 SL50 exits Earth's Hill sphere, traveling from 3.38 to 5.35 LD.
Approaching our neighborhood next, newly announced 2012 SJ58 comes inside ten LD tomorrow (a preliminary calculation with some uncertainty) and 2010 JK1 arrives on November 22nd.
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 28 September '12
The MPC's NEO Confirmation Page has 12 listings
When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had twelve objects listed. Of these, eight were "one nighters." So far The Tracking News has counted a total of 21 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 28 September '12
Minor Planet Electronic Circulars
As of last check at 2359 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2012-S80 time-stamped "06:03 UT" - Daily Orbit Update - see below
- MPEC 2012-S81 time-stamped "17:56 UT" - 2012 SF58 - see below
- MPEC 2012-S82 time-stamped "17:59 UT" - 2012 SG58 - see below
- MPEC 2012-S83 time-stamped "18:02 UT" - 2012 SH58 - see below
- MPEC 2012-S84 time-stamped "20:09 UT" - 2012 SJ58
MPEC 2012-S84 - "20:09 UT" - 2012 SJ58
- K12S58J 2012 SJ58 (Earth MOID=5.7 LD, H=26.4 ~18m, close passer) from the Mt. Lemmon Survey (MLS) (Sept. 26.36-39p8 & 27.24p3), the Spacewatch 1.8m telescope (Sept. 26.41p3), and Cordoba Obs. Bosque Alegre Station (Sept. 27.14p4)
MPEC 2012-S83 - "18:02 UT" - 2012 SH58
- K12S58H 2012 SH58 (small asteroid, Earth MOID=10.4 LD, i=0.3°, H=27.0 ~13m) from MLS (Sept. 26.26-30p8 & 27.25-26p4), Spacewatch 1.8m (Sept. 26.35p3), and Bosque Alegre Sta. (Sept. 28.11-12p3)
MPEC 2012-S82 - "17:59 UT" - 2012 SG58
- K12S58G 2012 SG58 (small asteroid, Q=4.867 AU, Earth MOID=1.0 LD, H=23.2 ~78m) from the Catalina Sky Survey (CSS) (Sept. 26.26-30p8 & 27.35p4), Spacewatch 1.8m (Sept. 26.37p3), MLS (Sept. 27.28p4), Tim Lister via Faulkes Telescope South (Sept. 27.72-73p3), and Great Shefford Obs. (Sept. 28.11p3)
MPEC 2012-S81 - "17:56 UT" - 2012 SF58
- K12S58F 2012 SF58 (Earth MOID=5.6 LD, H=25.9 ~22m, close passer) from MLS (Sept. 26.18-19p4, 26.28p4, 26.39-40p4 & 27.24p4) and Great Shefford Obs. (Sept. 26.88-94p5)
- Observation campaigns (radar support, potential mission destinations)
- K03U20C 2003 UC20 (arc=4 opp, H=18.1 ~812m, PMD) from Paul Roche via Faulkes Telescope North (Sept. 27.60p6)
-- Potential mission destinations list & ephemerides + NHATS
- Observations of small asteroids (H>22.0)
- K12R02M 2012 RM2 (arc=18 days, H=22.8 ~93m) from Sierra Stars Obs. (Sept. 27.29-30p3)
- Observations of other asteroidal objects
- K12Q10P 2012 QP10 (arc=2 opp, H=19.5 ~426m) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Sept. 26.99p3)
- K12P00W 2012 PW (arc=52 days, H=18.9 ~562m) from Pan-STARRS 1 (PS1) (Sept. 27.61-63p4)
- K12J11S 2012 JS11 (Q=4.745 AU, arc=136 days, H=20.1 ~323m) from South Obs. (Sept. 27.92-93p6)
- K09A00V 2009 AV (i=45.9°, arc=2 opp, H=18.1 ~812m) from Holmes/CTIO (Sept. 26.98-99p4)
- K08Y32U 2008 YU32 (arc=4 opp, H=20.1 ~323m) from PS1 (Sept. 27.61-63p3)
- K08V04U 2008 VU4 (Q=4.212 AU, arc=3 opp, H=17.5 ~1.07 km) from PS1 (Sept. 27.61-63p4)
- K07Y00Z 2007 YZ (arc=5 opp, H=19.6 ~407m) from Holmes/CTIO (Sept. 27.01-02p2)
- K06T00B 2006 TB (arc=4 opp, H=20.1 ~323m) from David Tholen's team on Mauna Kea (July 22.61p2)
- K01Y02M 2001 YM2 (arc=2 opp, H=19.2 ~490m) from Holmes/CTIO (Sept. 26.98-00p4)
- S0136 280136 2002 OM4 from Tholen team/Mauna Kea (July 22.62-63p2)
- R6397 276397 2002 XA40 from Galati Obs. (Sept. 27.72-75p32)
- 87684 87684 2000 SY2 from Rhozen Obs. (Aug. 8.08-10p9)
- 04486 4486 Mithra (1987 SB) from PS1 (Sept. 27.61-63p4)
Observers on 28 September '12
Fourteen observers appear in today's MPECs.
|Code||Observer / observatory|
|703||Catalina Sky Survey in Arizona, 1 in MPEC 2012-S82 -- 2012 SG58|
|807|||Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPEC 2012-S80 -- 2012 QP10, 2009 AV, 2007 YZ, 2001 YM2|
|821||Cordoba Obs. Bosque Alegre Station in Argentina, 2 in MPECs 2012-S83 & 2012-S84 -- 2012 SJ58, 2012 SH58|
|F657||Paul Roche in Wales via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-S80 -- 2003 UC20|
|E100||Tim Lister in southern California via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-S82 -- 2012 SG58|
|C73||Galati Obs. in Romania, 1 in MPEC 2012-S80 -- 276397|
|J95||Great Shefford Obs. in England, 2 in MPECs 2012-S81 & 2012-S82 -- 2012 SG58, 2012 SF58|
|5682||David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2012-S80 -- 2006 TB, 280136|
|G96||Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2012-S81, 2012-S82, 2012-S83 & 2012-S84 -- 2012 SJ58, 2012 SH58, 2012 SG58, 2012 SF58|
|F51||Pan-STARRS 1 (PS1) in Hawaii, 4 in MPEC 2012-S80 -- 2012 PW, 2008 YU32, 2008 VU4, 4486|
|071||Rhozen Obs. in Bulgaria, 1 in MPEC 2012-S80 -- 87684|
|G68||Sierra Stars Obs. in northern California, 1 in MPEC 2012-S80 -- 2012 RM2|
|J84||South Obs. in England, 1 in MPEC 2012-S80 -- 2012 JS11|
|291||Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2012-S82, 2012-S83 & 2012-S84 -- 2012 SJ58, 2012 SH58, 2012 SG58|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 28 September '12
At last check (NEODyS and JPL at 2359 UTC) there was no risk monitoring news to report yet today. Visit the CRT to view activity in the last four weeks and our ephemerides page for a complete list of risk-rated objects under current observation or having recent news.
Chronology on 28 September '12
Times are UTC for when items were noted or added by The Tracking News.
|2214||Updated Traffic Report|
|2019||Grabbed MPEC 2012-S84 - 2012 SJ58 - see above|
|1845||Grabbed MPEC 2012-S81 - 2012 SF58 - see above|
Grabbed MPEC 2012-S82 - 2012 SG58 - see above
Grabbed MPEC 2012-S83 - 2012 SH58 - see above
|1524||Grabbed MPEC 2012-S80 - Daily Orbit Update - see above|