Contents on 27 October '12
- Traffic Report -- four objects
- Radar Astrometry -- one object
- IAU Minor Planet Center
- Observers -- seventeen observers
- Impact Risk Monitoring -- three objects
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page (archive)
Of 464 risk-listed objects, 27 have had news in the last 30 days. Updated at 1615 UTC on 27 Oct.
- 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 27 October '12
Four objects reported inside ten LD
Four objects are reported inside ten lunar distances (LD) of our home world today. Newly announced 2012 UU169 is inbound from 7.04 to 4.85 LD while the other three cross the ten-LD artificial boundary: 2012 UW9 enters from 10.5 to 9.7 LD* and 2012 UX136 from 11.0 to 9.8 LD*, and 2012 TP231 exits from 9.76 to 11.14 LD.
Headed our way next, 2012 UV136 arrives inside ten LD on November 1st, risk-listed 2012 UY68 arrives on November 7th, and radar target 2010 JK1 on November 22nd.
This report was updated at 2215 UTC with new discovery 2012 UU169 (MPEC). Today's first traffic report was generated at 1616 UTC with radar observation of 2012 QG42 from last month and follow-up in today's DOU MPEC for 2012 UX136 and 2012 UV136.
Additional comment: We noted at 1702 UTC that the DOU today reports each observation twice and JPL had not yet posted new orbit solutions for those last two objects. JPL has now posted new solutions and we have updated our related pages.
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.
Radar Astrometry on 27 October '12
Radar observation of one object
Data update noted at 0132 UTC when the database was dated 26 Oct.
NEOCP Activity on 27 October '12
The MPC's NEO Confirmation Page has 22 listings
When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 22 objects listed. Of these, thirteen were "one nighters." So far The Tracking News has counted a total of 52 listings on the NEOCP today.
New MPECs on 27 October '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-U110 time-stamped "06:08 UT" - Daily Orbit Update - see below
- MPEC 2012-U111 time-stamped "19:41 UT" - 2012 US169 - see below
- MPEC 2012-U112 time-stamped "19:44 UT" - 2012 UT169 - see below
- MPEC 2012-U113 time-stamped "19:52 UT" - 2012 UU169 - see below
- MPEC 2012-U114 time-stamped "20:22 UT" - 1998 WL4
MPEC 2012-U114 - "20:22 UT" - 1998 WL4
- J98W04L 1998 WL4 (H=19.5 ~426m) from the Catalina Sky Survey (CSS) (Oct. 25.26-32p8), Astronomical Research Obs. Westfield (Oct. 25.31-32p3), Wildberg Obs. (Oct. 25.84-85p4), Teide Obs. (Oct. 26.07-12p3), and Sandlot Obs. (Oct. 27.14-17p3)
MPEC 2012-U113 - "19:52 UT" - 2012 UU169
- K12UG9U 2012 UU169 (Q=4.001 AU, Earth MOID=1.7 LD, H=25.6 ~26m, close passer) from CSS (Oct. 25.20-23p4 & 25.28-32p8), ARO Westfield (Oct. 25.28-29p3 & 27.26p4), Moriyama Obs. (Oct. 25.59-62p4), and Sandlot Obs. (Oct. 27.19-20p4)
MPEC 2012-U112 - "19:44 UT" - 2012 UT169
- K12UG9T 2012 UT169 (H=20.5 ~269m) from Pan-STARRS 1 (PS1) (Oct. 23.50-54p3), the Spacewatch 1.8m telescope (Oct. 25.27-28p3 & 26.17-18p3), and the Mt. Lemmon Survey (MLS) (Oct. 26.41-42p4)
MPEC 2012-U111 - "19:41 UT" - 2012 US169
- K12UG9S 2012 US169 (H=20.6 ~257m) from PS1 (Oct. 22.55-58p3 at w=21.7-22.2), Spacewatch 1.8m (Oct. 23.19p2), Magdalena Ridge Obs. (MRO) (Oct. 23.37-41p4), and McDonald Obs. (Oct. 25.34-35p3)
- Observations of risk-listed objects
- K12U68U 2012 UU68 (small asteroid, arc=8 days, H=23.0 ~85m) from Spacewatch 1.8m (Oct. 26.49-50p6)
- K12U33Z 2012 UZ33 (arc=9 days, H=19.0 ~537m) from Spacewatch 1.8m (Oct. 26.46-47p6)
- Observations of close-passing objects
- K12UD6X 2012 UX136 (arc=3 days, H=25.1 ~32m) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Oct. 25.22-23p8)
- K12UD6V 2012 UV136 (arc=4 days, H=25.6 ~26m, PMD candidate) from Tim Lister via Faulkes Telescope North (Oct. 26.60p18)
- Observation campaigns (radar support, potential mission destinations)
- G2911 162911 2001 LL5 (PMD) from Desert Moon Obs. (Oct. 26.12-13p8)
-- Potential mission destinations list & ephemerides + NHATS
- Observations of small asteroids (H>22.0)
- K12T53D 2012 TD53 (arc=18 days, H=22.1 ~129m) from Desert Moon Obs. (Oct. 26.33-38p6)
- K12T52X 2012 TX52 (arc=10 days, H=22.1 ~129m) from David Tholen's team on Mauna Kea (Oct. 17.28-29p6)
- K12Q14K 2012 QK14 (arc=57 days, H=22.4 ~112m) from Tholen team/Mauna Kea (Oct. 17.26p2)
- Observations of other asteroidal objects
- K12U27W 2012 UW27 (Q=4.471 AU, arc=9 days, H=21.1 ~204m) from Desert Moon Obs. (Oct. 26.27-30p6)
- K12U09S 2012 US9 (arc=10 days, H=21.6 ~162m) from Desert Moon Obs. (Oct. 25.15p2 & 26.16-24p6)
- K12T78X 2012 TX78 (arc=17 days, H=19.2 ~490m) from MLS (Oct. 26.43-45p8)
- K12T53F 2012 TF53 (arc=15 days, H=21.2 ~195m) from Tholen team/Mauna Kea (Oct. 17.44-45p6)
- K07Y00K 2007 YK (arc=4 opp, H=17.5 ~1.07 km) from Holmes/CTIO (Oct. 20.34-36p10 & 23.36-38p10)
- X3578 333578 2006 KM103 from Holmes/CTIO (Oct. 25.30-33p14)
- W2652 322652 1999 JO8 from Holmes/CTIO (Oct. 25.36-37p8)
- V7685 317685 2003 NO4 from Holmes/CTIO (Oct. 25.36-37p6)
- N7442 237442 1999 TA10 from Desert Moon Obs. (Oct. 26.40-42p10)
- N2368 232368 2003 AZ2 from Holmes/CTIO (Oct. 25.31-32p8)
- M0839 220839 2004 VA from CSS (Oct. 26.41-43p8)
- F4278 154278 2002 TB9 from Holmes/CTIO (Oct. 25.33-36p14)
- F3306 153306 2001 JL1 from the Spacewatch 0.9m telescope (Oct. 26.31-35p6)
- 05587 5587 1990 SB from MLS (Oct. 26.17-19p8)
- 03200 3200 Phaethon (1983 TB) from CSS (Oct. 26.21-22p6)
- 01685 1685 Toro (1948 OA) from CSS (Oct. 26.51p8)
Observers on 27 October '12
Seventeen observers appear in today's MPECs.
|Code||Observer / observatory|
|251||Arecibo in Puerto Rico, 1 in radar -- 2012 QG42|
|H21||Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2012-U113 & 2012-U114 -- 2012 UU169, 1998 WL4|
|703||Catalina Sky Survey (CSS) in Arizona, 5 in MPECs 2012-U110, 2012-U113 & 2012-U114 -- 2012 UU169, 1998 WL4, 220839, 3200, 1685|
|807|||Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPEC 2012-U110 -- 2012 UX136, 2007 YK, 333578, 322652, 317685, 232368, 154278|
|448||Desert Moon Obs. in New Mexico, 5 in MPEC 2012-U110 -- 2012 UW27, 2012 US9, 2012 TD53, 237442, 162911|
|F65%||Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-U110 -- 2012 UV136|
|H01||Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2012-U111 -- 2012 US169|
|5682||David Tholen's team on Mauna Kea in Hawaii, 3 in MPEC 2012-U110 -- 2012 TX52, 2012 TF53, 2012 QK14|
|711||McDonald Obs. in Texas, 1 in MPEC 2012-U111 -- 2012 US169|
|900||Moriyama Obs. in Japan, 1 in MPEC 2012-U113 -- 2012 UU169|
|G96||Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2012-U110 & 2012-U112 -- 2012 UT169, 2012 TX78, 5587|
|F51||Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2012-U111 & 2012-U112 -- 2012 UT169, 2012 US169|
|H36||Sandlot Obs. in Kansas, 2 in MPECs 2012-U113 & 2012-U114 -- 2012 UU169, 1998 WL4|
|691||Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2012-U110 -- 153306|
|291||Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2012-U110, 2012-U111 & 2012-U112 -- 2012 UZ33, 2012 UU68, 2012 UT169, 2012 US169|
|954||Teide Obs. in the Canary Islands, 1 in MPEC 2012-U114 -- 1998 WL4|
|198||Wildberg Obs. in Germany, 1 in MPEC 2012-U114 -- 1998 WL4|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 27 October '12
Notes for Today's Latest Risk Assessments
|2012 UR158||NEODyS||1613||2033-2081||21||1.72e-07||-3.97||-4.26||0||NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2012-10-22.476 to 2012-10-26.472."|
|2012 UU68||JPL Sentry||1612||2101||1||1.7e-08||-7.26||-7.26||0||JPL: "Analysis based on 39 observations spanning 7.9405 days (2012-Oct-18.55712 to 2012-Oct-26.49767)." Diameter approximately 0.082 km. from mean, weighted H=23.1.|
|2012 UZ33||JPL Sentry||1612||2098||1||2.4e-10||-7.06||-7.06||0||JPL: "Analysis based on 44 observations spanning 9.0247 days (2012-Oct-17.44832 to 2012-Oct-26.47302)." Diameter approximately 0.470 km. from mean, weighted H=19.3.|
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 October '12
Times are UTC for when items were noted or added by The Tracking News.
|2215||Updated Traffic Report|
|2050||Grabbed MPEC 2012-U114 - 1998 WL4 - see above|
|2015||Grabbed MPEC 2012-U111 - 2012 US169 - see above|
Grabbed MPEC 2012-U112 - 2012 UT169 - see above
Grabbed MPEC 2012-U113 - 2012 UU169 - see above
|1614||Grabbed MPEC 2012-U110 - Daily Orbit Update - see above|
|1612||Noted that NEODyS has posted 2012 UR158 as an impact risk - see above|
Noted that JPL Sentry has updated its 2012 UU68 risk assessment - see above
Noted that JPL Sentry has updated its 2012 UZ33 risk assessment - see above
|0132||Noted Radar Astrometry database update - see above|