Contents  on 17 September '12

Asteroid/Comet Connection (A/CC) Resources:

The latest A/CC news is available via framed access, RSS news feed RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate RSS news feed.

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 17 September '12

No objects reported inside ten LD

No objects are reported flying within ten lunar distances (LD) of Earth today. 2012 RK15 arrives inside ten LD on September 23rd and 2010 JK1 on November 22nd.

This report was updated at 2135 UTC with new discoveries 2012 RT16 (MPEC) and 2012 RR16 (MPEC), both already having passed through the ten-LD "bubble." This report was first generated at 1553 UTC with follow-up in today's DOU MPEC for departed 2012 QG42 and 2012 QB18.


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.

Radar Astrometry  on 17 September '12

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 2212 UTC when the database was dated 17 Sept.

NEOCP Activity  on 17 September '12

The MPC's NEO Confirmation Page has 21 listings

When last checked at 2305 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 21 objects listed. Of these, fourteen were "one nighters." So far The Tracking News has counted a total of 40 listings on the NEOCP today.

New MPECs  on 17 September '12

Minor Planet Electronic Circulars

As of last check at 2305 UTC, there have been ten MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2012-S23 - "18:23 UT" - 2012 RX16


MPEC 2012-S22 - "18:20 UT" - 2012 RW16


MPEC 2012-S21 - "18:18 UT" - 2012 RV16


MPEC 2012-S20 - "18:16 UT" - 2012 RU16


MPEC 2012-S19 - "18:13 UT" - 2012 RT16


MPEC 2012-S18 - "18:11 UT" - 2012 RS16


MPEC 2012-S17 - "18:08 UT" - 2012 RR16


MPEC 2012-S16 - "18:06 UT" - 2012 RQ16


MPEC 2012-S15 - "18:03 UT" - 2011 TC4


<< DOU on 17 Sept. '12 >>  MPEC 2012-S14 - "06:02 UT" - Daily Orbit Update

Observers  on 17 September '12

A total of 35 observers appear in today's MPECs.

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 2012 JS11
H21Astronomical Research Obs. Westfield in Illinois, 8 in MPECs 2012-S14, 2012-S16, 2012-S17, 2012-S18, 2012-S20, 2012-S21, 2012-S22 & 2012-S23 -- 2012 RX16, 2012 RW16, 2012 RV16, 2012 RU16, 2012 RS16, 2012 RR16, 2012 RQ16, 2012 QG42
160Castelmartini Obs. in Italy, 3 in MPEC 2012-S14 -- 2012 RH15, 2012 RG15, 2012 QG42
703Catalina Sky Survey (CSS) in Arizona, 13 in MPECs 2012-S14, 2012-S17, 2012-S21, 2012-S22 & 2012-S23 -- 2012 RX16, 2012 RW16, 2012 RV16, 2012 RR16, 2012 RM2, 2012 QG42, 2012 QE50, 2012 LE11, 96536, 334412, 329520, 178871, 3288
470Ceccano Obs. in Italy, 2 in MPECs 2012-S17 & 2012-S22 -- 2012 RW16, 2012 RR16
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPECs 2012-S14, 2012-S20, 2012-S21, 2012-S22 & 2012-S23 -- 2012 RX16, 2012 RW16, 2012 RV16, 2012 RU16, 2012 KM45, 2012 KL45, 2012 HG31, 1998 FF14, 280136, 154278
G58Chabot Obs. in northern California, 1 in MPEC 2012-S18 -- 2012 RS16
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 2 in MPEC 2012-S14 -- 2012 QE50, 2012 PS17
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 9 in MPECs 2012-S14, 2012-S16, 2012-S18, 2012-S19, 2012-S22 & 2012-S23 -- 2012 RX16, 2012 RW16, 2012 RT16, 2012 RS16, 2012 RQ16, 2012 QG49, 2012 QB18, 2012 PO28, 2012 MV4
F65$Ernesto Guido in Italy via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-S16 -- 2012 RQ16
E100Tim Lister in southern California via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-S23 -- 2012 RX16
651Grasslands Obs. in Arizona, 2 in MPECs 2012-S17 & 2012-S22 -- 2012 RW16, 2012 RR16
J95Great Shefford Obs. in England, 2 in MPECs 2012-S17 & 2012-S18 -- 2012 RS16, 2012 RR16
D19Hong Kong Space Museum Obs. in Hong Kong, 1 in MPEC 2012-S14 -- 2012 QE50
D00ISON-Kislovodsk Obs., 1 in MPEC 2012-S16 -- 2012 RQ16
H15ISON-NM Obs. in New Mexico, 2 in MPEC 2012-S14 -- 2007 HZ, 2002 RC118
H75Indian Hill North Obs. in Ohio, 1 in MPEC 2012-S14 -- 2012 QG42
246KLENOT in the Czech Republic, 1 in MPEC 2012-S14 -- 2012 QO10
J75La Sagra Obs. in Spain, 1 in MPEC 2012-S18 -- 2012 RS16
130Lumezzane Obs. in Italy, 3 in MPEC 2012-S14 -- 2012 QO10, 2012 QE50, 2007 RT19
C94MASTER-II Obs. Tunka in Russia, 1 in MPEC 2012-S14 -- 2002 RC118
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPECs 2012-S15 & 2012-S19 -- 2012 RT16, 2011 TC4
474Mt. John Obs. in New Zealand, 8 in MPECs 2012-S14, 2012-S17, 2012-S19, 2012-S20, 2012-S21, 2012-S22 & 2012-S23 -- 2012 RX16, 2012 RW16, 2012 RV16, 2012 RU16, 2012 RT16, 2012 RR16, 2012 RP15, 2012 RO15
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2012-S14, 2012-S19 & 2012-S20 -- 2012 RU16, 2012 RT16, 2012 LE11, 2010 RQ30
A13Naef Obs. in Switzerland, 1 in MPEC 2012-S14 -- 2000 RH60
A24New Millennium Obs. in Italy, 5 in MPEC 2012-S14 -- 333284, 331963, 20460, 105140, 4487
B49Paus Obs. in Spain, 1 in MPEC 2012-S16 -- 2012 RQ16
B38Santa Mama Obs. in Italy, 3 in MPEC 2012-S14 -- 333284, 163732, 105140
204Schiaparelli Obs. in Italy, 1 in MPEC 2012-S17 -- 2012 RR16
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2012-S14 -- 2012 ES14
291Spacewatch 1.8m telescope in Arizona, 14 in MPECs 2012-S14, 2012-S16, 2012-S17, 2012-S18, 2012-S19, 2012-S20, 2012-S21, 2012-S22 & 2012-S23 -- 2012 RX16, 2012 RW16, 2012 RV16, 2012 RU16, 2012 RT16, 2012 RS16, 2012 RR16, 2012 RQ16, 2012 QY14, 2012 QK14, 2012 QF42, 2012 MR7, 2010 UX7, 2010 HQ80
I93St. Pardon de Conques Obs. in France, 3 in MPECs 2012-S17, 2012-S19 & 2012-S20 -- 2012 RU16, 2012 RT16, 2012 RR16
C36Starry Wanderer Obs. in Belarus, 1 in MPEC 2012-S14 -- 2012 QE50
954Teide Obs. in the Canary Islands, 1 in MPEC 2012-S16 -- 2012 RQ16
926Tenagra II Obs. in Arizona, 4 in MPECs 2012-S14, 2012-S16 & 2012-S18 -- 2012 RS16, 2012 RQ16, 67399, 333889
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 September '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2305 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON2 risk pages.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2012 RU16JPL Sentry20272032-210672.7e-06-6.11-6.360JPL: "Analysis based on 26 observations spanning 2.1928 days (2012-Sep-15.34955 to 2012-Sep-17.54232)." Diameter approximately 0.026 km. from mean, weighted H=25.5.

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

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 17 September '12

Times are UTC for when items were noted or added by The Tracking News.

2212Noted Radar Astrometry database update - see above
2135Updated Traffic Report
2027Noted that JPL Sentry has posted 2012 RU16 as an impact risk - see above
1828Grabbed MPEC 2012-S15 - 2011 TC4 - see above
Grabbed MPEC 2012-S16 - 2012 RQ16 - see above
Grabbed MPEC 2012-S17 - 2012 RR16 - see above
Grabbed MPEC 2012-S18 - 2012 RS16 - see above
Grabbed MPEC 2012-S19 - 2012 RT16 - see above
Grabbed MPEC 2012-S20 - 2012 RU16 - see above
Grabbed MPEC 2012-S21 - 2012 RV16 - see above
Grabbed MPEC 2012-S22 - 2012 RW16 - see above
Grabbed MPEC 2012-S23 - 2012 RX16 - see above
1552Grabbed MPEC 2012-S14 - Daily Orbit Update - see above