2012-02-15 Tracking News

Contents on 15 February '12

Traffic Report -- no objects
Radar Astrometry -- two objects
IAU Minor Planet Center
- NEOCP Activity -- 26 listings
- New MPECs -- seven MPECs
Observers -- 24 observers
Impact Risk Monitoring -- two objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page (archive)
Of 442 risk-listed objects, 30 have had news in the last 31 days. Updated at 1657 UTC on 15 Feb.
Earth's Busy Neighborhood close passer EBN Traffic Report
No objects are known to be within ten LD of Earth today. Updated at 1718 UTC on 15 Feb.
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 Feb.
Observing Campaigns

The latest A/CC news is available via framed access, 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 15 February '12

No objects reported inside ten LD

No objects are reported traveling within ten lunar distances (LD) of Earth today. Headed our way, radar target 2011 CP4 arrives inside ten LD on February 22nd and 2008 EJ85 comes inside ten LD on March 4th.

This report was updated at 1651 UTC with follow-up in today's DOU MPEC for 2011 CP4. This report was first posted at 0043 UTC.

Notes: Ten LD has no astronomical significance but is a useful reporting boundary. Distances are interpreted by A/CC from JPL Horizons data. See also today's timeline plus current additional details, sky chart, and ephemerides.

Radar Astrometry on 15 February '12

Radar observation of two objects

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

Data update noted at 0042 UTC when the database was dated 14 Feb.

2011 WN2 from Arecibo (2011 Nov. 19.09 velocity)

Data update noted at 2359 UTC when the database was dated 15 Feb.

162421 2000 ET70 from Arecibo (Feb. 12.37 range, 14.34 range, 15.33 velocity & 15.36 range) and Goldstone DSS-14 70m antenna (Feb. 15.39 range) - see links

NEOCP Activity on 15 February '12

The MPC's NEO Confirmation Page has 26 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 26 objects listed. Of these, 21 were "one nighters." So far The Tracking News has counted a total of 39 listings on the NEOCP today.

New MPECs on 15 February '12

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been seven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2012-C52 time-stamped "04:04 UT" - Comet C/2012 C2 (Bruenjes) - see below
MPEC 2012-C53 time-stamped "06:03 UT" - Daily Orbit Update - see below
MPEC 2012-C54 time-stamped "12:55 UT" - 2012 CC29 - see below
MPEC 2012-C55 time-stamped "12:57 UT" - 2012 CD29 - see below
MPEC 2012-C56 time-stamped "17:43 UT" - 2010 DO - see below
MPEC 2012-C57 time-stamped "20:10 UT" - 2012 CL29 - see below
MPEC 2012-C58 time-stamped "20:38 UT" - 2012 CM29

MPEC 2012-C58 - "20:38 UT" - 2012 CM29

K12C29M 2012 CM29 (H=21.7 ~155m) from the Spacewatch 0.9m telescope (Feb. 13.30-33p3), the Spacewatch 1.8m telescope (Feb. 13.44p3 & 15.46-47p3), and Sandlot Obs. (Feb. 14.44-46p3)

MPEC 2012-C57 - "20:10 UT" - 2012 CL29

K12C29L 2012 CL29 (small asteroid, H=22.9 ~89m) from Spacewatch 0.9m (Feb. 13.30-33p3), Spacewatch 1.8m (Feb. 13.43p3 & 15.46p3), and Sandlot Obs. (Feb. 14.38-40p3)

MPEC 2012-C56 - "17:43 UT" - 2010 DO

K10D00O 2010 DO (Earth MOID=6.3 LD, H=21.7 ~155m) from Pan-STARRS 1 (PS1) (Feb. 13.37-41p4 & 14.35-39p4), Tim Lister via Faulkes Telescope North (Feb. 15.39-40p3), and Spacewatch 1.8m (Feb. 15.41p2)

MPEC 2012-C55 - "12:57 UT" - 2012 CD29

K12C29D 2012 CD29 (q=0.361 AU, H=19.8 ~371m) from La Sagra Obs. (Feb. 13.95-96p3 & 14.10-11p2), Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Feb. 14.37-40p8), Sandlot Obs. (Feb. 14.41-42p3), ISON-NM Obs. (Feb. 14.43-46p4), Ernesto Guido via Faulkes Telescope North (Feb. 14.44p3), New Millennium Obs. (Feb. 14.97p3), and Spacewatch 1.8m (Feb. 15.48p3)

MPEC 2012-C54 - "12:55 UT" - 2012 CC29

K12C29C 2012 CC29 (risk-listed, Earth MOID=7.7 LD, i=1.8°, H=22.6 ~102m) from PS1 (Feb. 13.45-49p4), Lister/Faulkes North (Feb. 14.55-56p9), and Spacewatch 1.8m (Feb. 15.45p3)

<< DOU on 15 Feb. '12 >> MPEC 2012-C53 - "06:03 UT" - Daily Orbit Update

Observations of close-passing objects
K11C04P 2011 CP4 (q=0.118 AU, arc=4 opp, H=21.2 ~195m, close passer, radar support) from the Siding Spring Survey (SSS) (Feb. 14.77p2)
Observation campaigns (radar support, potential mission destinations)
J2642 192642 1999 RD32 (radar) from PS1 (Feb. 14.35-40p3)
G2421 162421 2000 ET70 (radar) from Kourovskaya Obs. (Jan. 25.96-98p3)
E1018 141018 2001 WC47 (PMD, radar) from Kourovskaya Obs. (Jan. 24.74-78p3 & 25.83-92p8)
29075 29075 1950 DA (radar) from Kourovskaya Obs. (Jan. 25.91-95p2)
-- Potential mission destinations list & ephemerides -- Planetary radar schedules: Arecibo & Goldstone
Observations of small asteroids (H>22.0)
K12B77O 2012 BO77 (arc=18 days, H=22.2 ~123m) from Holmes/CTIO (Feb. 14.02-03p3)
K12B77L 2012 BL77 (arc=9 days, H=23.1 ~81m) from David Tholen's team on Mauna Kea (Feb. 4.37-38p3)
K02X40Q 2002 XQ40 (arc=2 opp, H=22.5 ~107m) from PS1 (Feb. 14.35-40p3 at w=21.7-22.2)
Observations of other asteroidal objects
K12BC4C 2012 BC124 (i=41.7°, arc=15 days, H=19.7 ~389m) from Cupillari Obs. (Feb. 14.04-09p3)
K12B23T 2012 BT23 (arc=26 days, H=19.1 ~513m) from Cupillari Obs. (Feb. 14.04-09p3) and Cordoba Obs. (Feb. 15.04-06p3)
K12A22T 2012 AT22 (arc=35 days, H=20.3 ~295m) from Holmes/CTIO (Feb. 14.38-40p7)
V2942 312942 1995 EK1 from PS1 (Feb. 14.60-62p2)
V0442 310442 2000 CH59 from Kourovskaya Obs. (Jan. 25.75-76p3)
S9315 289315 2005 AN26 from PS1 (Feb. 14.27-28p2)
R6049 276049 2002 CE26 from PS1 (Feb. 14.60-61p2)
R5976 275976 2001 XV10 from PS1 (Feb. 14.48-49p2)
Q3976 263976 2009 KD5 from Kourovskaya Obs. (Jan. 25.95-98p4)
N8063 238063 2003 EG from PS1 (Feb. 14.61-62p2)
G3000 163000 2001 SW169 from PS1 (Feb. 14.53-54p2)
G2186 162186 1999 OP3 from Cupillari Obs. (Feb. 14.03-09p3)
G2038 162038 1996 DH from PS1 (Feb. 14.50-52p2)
F3951 153951 2002 AC3 from Kourovskaya Obs. (Jan. 25.97p4) and Cupillari Obs. (Feb. 14.10-13p3)
F2667 152667 1998 FR11 from PS1 (Feb. 14.60-61p2)
E3651 143651 2003 QO104 from Cupillari Obs. (Feb. 14.10-12p3)
D8524 138524 2000 OJ8 from Cupillari Obs. (Feb. 14.11-13p3)
D8013 138013 2000 CN101 from Cupillari Obs. (Feb. 14.11-14p3)
85839 85839 1998 YO4 from Cupillari Obs. (Feb. 14.03-08p3)
35396 35396 1997 XF11 from PS1 (Feb. 14.27-29p2)
32906 32906 1994 RH from Cupillari Obs. (Feb. 14.10-13p3)
21088 21088 1992 BL2 from Cupillari Obs. (Feb. 14.03-08p3)
03271 3271 Ul (1982 RB) from PS1 (Feb. 14.61-62p2)
01917 1917 Cuyo (1968 AA) from Etscorn Obs. (2011 July 2.24-25p2)
01620 1620 Geographos (1951 RA) from Kourovskaya Obs. (Jan. 24.64-65p2, 25.63-67p3 & 25.72p2)

MPEC 2012-C52 - "04:04 UT" - Comet C/2012 C2 (Bruenjes)

CK12C020 C/2012 C2 (Bruenjes) (i=162.8°, q=0.801 AU, TP=2012 Mar. 12.72466 TT) from Sendai Obs. (Feb. 12.40-41p6 & 14.47p5), Nerpio Obs. (Feb. 12.82p4), St. Pardon de Conques Obs. (Feb. 12.87-88p3), Vicksburg Obs. (Feb. 13.02-05p3), Cupillari Obs. (Feb. 14.02-07p3), Yatsuka Obs. (Feb. 14.44-45p6), Bernezzo Obs. (Feb. 14.77-79p4), and Zonalunar Obs. (Feb. 14.85-88p2)

Observers on 15 February '12

A total of 24 observers appear in today's MPECs.

Code	Observer / observatory
`251`	Arecibo in Puerto Rico, 2 in radar -- 2011 WN2, 162421
`C77`	Bernezzo Obs. in Italy, 1 in MPEC 2012-C52 -- C/2012 C2
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPECs 2012-C53 & 2012-C55 -- 2012 CD29, 2012 BO77, 2012 AT22
`822`	Cordoba Obs. in Argentina, 1 in MPEC 2012-C53 -- 2012 BT23
`I17`	Cupillari Obs. in Pennsylvania, 11 in MPECs 2012-C52 & 2012-C53 -- C/2012 C2, 2012 BT23, 2012 BC124, 85839, 32906, 21088, 162186, 153951, 143651, 138524, 138013
`719`	Etscorn Obs. in New Mexico, 1 in MPEC 2012-C53 -- 1917
`F65$`	Ernesto Guido in Italy via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-C55 -- 2012 CD29
`F65%`	Tim Lister in southern California via Faulkes Telescope North in Hawaii, 2 in MPECs 2012-C54 & 2012-C56 -- 2012 CC29, 2010 DO
`253`	Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 162421
`H15`	ISON-NM Obs. in New Mexico, 1 in MPEC 2012-C55 -- 2012 CD29
`168`	Kourovskaya Obs. in Russia, 7 in MPEC 2012-C53 -- 310442, 29075, 263976, 162421, 153951, 141018, 1620
`J75`	La Sagra Obs. in Spain, 1 in MPEC 2012-C55 -- 2012 CD29
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-C53 -- 2012 BL77
`I89`	Nerpio Obs. in Italy, 1 in MPEC 2012-C52 -- C/2012 C2
`A24`	New Millennium Obs. in Italy, 1 in MPEC 2012-C55 -- 2012 CD29
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 14 in MPECs 2012-C53, 2012-C54 & 2012-C56 -- 2012 CC29, 2010 DO, 2002 XQ40, 35396, 312942, 289315, 276049, 275976, 238063, 192642, 163000, 162038, 152667, 3271
`H36`	Sandlot Obs. in Kansas, 3 in MPECs 2012-C55, 2012-C57 & 2012-C58 -- 2012 CM29, 2012 CL29, 2012 CD29
`D93`	Sendai Obs. in Japan, 1 in MPEC 2012-C52 -- C/2012 C2
`E12`	Siding Spring Survey in New South Wales, 1 in MPEC 2012-C53 -- 2011 CP4
`691`	Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2012-C57 & 2012-C58 -- 2012 CM29, 2012 CL29
`291`	Spacewatch 1.8m telescope in Arizona, 5 in MPECs 2012-C54, 2012-C55, 2012-C56, 2012-C57 & 2012-C58 -- 2012 CM29, 2012 CL29, 2012 CD29, 2012 CC29, 2010 DO
`I93`	St. Pardon de Conques Obs. in France, 1 in MPEC 2012-C52 -- C/2012 C2
`H47`	Vicksburg Obs. in Mississippi, 1 in MPEC 2012-C52 -- C/2012 C2
`367`	Yatsuka Obs. in Japan, 1 in MPEC 2012-C52 -- C/2012 C2
`J08`	Zonalunar Obs. in Spain, 1 in MPEC 2012-C52 -- C/2012 C2

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring on 15 February '12

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2359 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 CC29	JPL Sentry	1649	2079-2087	2	2.7e-09	-6.99	-7.27	0	JPL: "Analysis based on 16 observations spanning 2.0006 days (2012-Feb-13.45335 to 2012-Feb-15.454)." Diameter approximately 0.133 km. from mean, weighted H=22.1.

2012 CA21	NEODyS	1650	2030-2078	4	5.2e-07	-3.12	-3.41	0	NEODyS: "Based on 34 optical observations (of which 1 are rejected as outliers) from 2012-02-12.121 to 2012-02-14.039."

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 15 February '12

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

2359	Noted Radar Astrometry database update - see above
2101	Grabbed MPEC 2012-C58 - 2012 CM29 - see above
2015	Grabbed MPEC 2012-C57 - 2012 CL29 - see above
1906	Grabbed MPEC 2012-C56 - 2010 DO - see above
1651	Updated Traffic Report
1649	Noted that NEODyS has posted 2012 CA21 as an impact risk - see above Noted that JPL Sentry has posted 2012 CC29 as an impact risk - see above Grabbed MPEC 2012-C53 - Daily Orbit Update - see above Grabbed MPEC 2012-C54 - 2012 CC29 - see above Grabbed MPEC 2012-C55 - 2012 CD29 - see above
0449	Grabbed MPEC 2012-C52 - Comet C/2012 C2 (Bruenjes) - see above
0042	Noted Radar Astrometry database update - see above

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