2012-02-19 Tracking News

Contents on 19 February '12

Traffic Report -- one object
IAU Minor Planet Center
- NEOCP Activity -- 21 listings
- New MPECs -- five MPECs
Observers -- sixteen observers
Impact Risk Monitoring -- eight objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page (archive)
Of 445 risk-listed objects, 33 have had news in the last 31 days. Updated at 1832 UTC on 19 Feb.
Earth's Busy Neighborhood close passer EBN Traffic Report
One object is known to be within ten LD of Earth today. Updated at 1900 UTC on 19 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 19 February '12

One object reported inside ten LD

One object is reported moving inside ten lunar distances (LD) of Earth today. 2012 DX travels from 6.9 to 4.6 LD*.

Known to be inbound are risk-listed 2012 CS46 (LD*) and 2012 DZ (LD*), which arrive inside ten LD tomorrow, while 2012 DY (LD*) comes inside ten LD on February 22nd, radar target 2011 CP4 on February 22nd, and 2008 EJ85 on March 4th.

This report was updated at 1820 UTC with new discoveries 2012 DZ (MPEC), 2012 DY (MPEC), and 2012 DX (MPEC). This report was previously updated at 0035 UTC.

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

NEOCP Activity on 19 February '12

The MPC's NEO Confirmation Page has 21 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 21 objects listed. Of these, eight were "one nighters." So far The Tracking News has counted a total of 30 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 19 February '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-D22 time-stamped "06:03 UT" - Daily Orbit Update - see below
MPEC 2012-D23 time-stamped "15:36 UT" - 2012 DX - see below
MPEC 2012-D24 time-stamped "15:38 UT" - 2012 DY - see below
MPEC 2012-D25 time-stamped "15:40 UT" - 2012 DZ - see below
MPEC 2012-D26 time-stamped "17:14 UT" - 2008 JZ30

MPEC 2012-D26 - "17:14 UT" - 2008 JZ30

K08J30Z 2008 JZ30 (H=18.5 ~676m) from Astronomical Research Obs. Westfield (Feb. 17.47-49p4 & 19.36-38p3)

MPEC 2012-D25 - "15:40 UT" - 2012 DZ

K12D00Z 2012 DZ (risk-listed, Earth MOID=1.0 LD, i=1.3°, H=26.0 ~21m, close passer) from the Catalina Sky Survey (CSS) (Feb. 19.41-47p9) and Moriyama Obs. (Feb. 19.55-57p3)

MPEC 2012-D24 - "15:38 UT" - 2012 DY

K12D00Y 2012 DY (Earth MOID=6.1 LD, H=26.7 ~15m, close passer) from CSS (Feb. 19.30-33p4 & 19.41-47p8) and ARO Westfield (Feb. 19.42-43p4)

MPEC 2012-D23 - "15:36 UT" - 2012 DX

K12D00X 2012 DX (risk-listed, Earth MOID=0.8 LD, H=27.0 ~13m, close passer) from CSS (Feb. 19.27-29p3, 19.35-39p8 & 19.45p2), Sandlot Obs. (Feb. 19.37-40p3), and Moriyama Obs. (Feb. 19.61-62p4)

<< DOU on 19 Feb. '12 >> MPEC 2012-D22 - "06:03 UT" - Daily Orbit Update

Observations of risk-listed objects
K12C29C 2012 CC29 (small asteroid, Q=4.227 AU, arc=5 days, H=22.5 ~107m) from the Spacewatch 1.8m telescope (Feb. 18.43p3)
K12C21A 2012 CA21 (Q=4.378 AU, arc=7 days, H=19.2 ~490m) from ARO Westfield (Feb. 18.03-04p3), Great Shefford Obs. (Feb. 18.81-83p3), and Mark Trueblood via Kitt Peak Natl. Obs. (KPNO) (Feb. 19.11p3)
K12B86J 2012 BJ86 (arc=21 days, H=21.7 ~155m) from ARO Westfield (Feb. 18.13-15p3) and Spacewatch 1.8m (Feb. 19.13p3)
99942 99942 Apophis (2004 MN4) (PMD) from ARO Westfield (Feb. 18.04-06p4)
Observations of recently (no longer) risk-listed objects
K12B11N 2012 BN11 (arc=30 days, H=20.9 ~224m) from Trueblood/KPNO (Feb. 18.39p3)
Observation campaigns (radar support, potential mission destinations)
K06C00J 2006 CJ (q=0.166 AU, arc=3 opp, H=20.2 ~309m, radar) from Schiaparelli Obs. (Feb. 6.87p3)
K02A00W 2002 AW (arc=3 opp, H=20.7 ~245m, PMD) from Schiaparelli Obs. (Feb. 6.99-00p3)
H5706 175706 1996 FG3 (PMD) from ARO Westfield (Feb. 17.04-08p4)
E1018 141018 2001 WC47 (PMD, radar) from CSS (Feb. 18.19-21p4) and Hamamatsu-Yuto Obs. (Feb. 18.55-57p3)
00433 433 Eros (1898 DQ) (radar) from Mt. Tuffley Obs. (Feb. 19.04-05p3)
-- Potential mission destinations list & ephemerides -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K12C46P 2012 CP46 (arc=6 days, H=25.8 ~23m) from Great Shefford Obs. (Feb. 18.85-89p3)
K12C29L 2012 CL29 (arc=5 days, H=23.4 ~71m) from Spacewatch 1.8m (Feb. 18.50-51p3)
K12C00S 2012 CS (Q=4.063 AU, arc=16 days, H=23.1 ~81m) from Spacewatch 1.8m (Feb. 18.34-35p3)
K12C00A 2012 CA (arc=17 days, H=23.5 ~68m) from ARO Westfield (Feb. 18.15-17p3 at V=22.0-22.3)
K12B77O 2012 BO77 (arc=22 days, H=22.2 ~123m) from ARO Westfield (Feb. 18.09-11p3)
K12B77M 2012 BM77 (arc=11 days, H=23.9 ~56m) from Schiaparelli Obs. (Feb. 7.02-03p3)
K12B77L 2012 BL77 (arc=23 days, H=23.3 ~74m) from ARO Westfield (Feb. 18.04-07p3 at V=22.2-5)
K11Y62W 2011 YW62 (arc=50 days, H=23.4 ~71m) from ARO Westfield (Feb. 18.08-14p3 at V=22.1-2)
K11W46Q 2011 WQ46 (arc=83 days, H=24.0 ~54m) from Spacewatch 1.8m (Feb. 18.49-50p2)
K08P01F 2008 PF1 (arc=2 opp, H=22.1 ~129m) from CSS (Feb. 18.38-40p3)
K12C29M 2012 CM29 (arc=5 days, H=21.8 ~148m) from Spacewatch 1.8m (Feb. 18.51p3)
K11V05O 2011 VO5 (arc=109 days, H=21.8 ~148m) from Spacewatch 1.8m (Feb. 19.14-15p3)
Observations of other asteroidal objects
K12C19L 2012 CL19 (arc=8 days, H=21.7 ~155m) from Spacewatch 1.8m (Feb. 19.19p3)
K12C17C 2012 CC17 (arc=15 days, H=20.5 ~269m) from Schiaparelli Obs. (Feb. 6.90-92p2) and CSS (Feb. 18.19-21p4)
K12C02P 2012 CP2 (arc=17 days, H=20.7 ~245m) from Spacewatch 1.8m (Feb. 18.36-37p3)
K12BD4J 2012 BJ134 (q=0.374 AU, Q=4.139 AU, arc=30 days, H=18.0 ~851m) from Spacewatch 1.8m (Feb. 18.46p3)
K12BC4C 2012 BC124 (i=41.7°, arc=19 days, H=19.7 ~389m) from Schiaparelli Obs. (Feb. 6.95-96p3) and ARO Westfield (Feb. 18.16-17p3)
K12BC4B 2012 BB124 (arc=20 days, H=21.4 ~178m) from Schiaparelli Obs. (Feb. 6.97-98p2) and CSS (Feb. 18.19-22p4)
K12B76Z 2012 BZ76 (Q=4.045 AU, arc=25 days, H=18.8 ~589m) from Spacewatch 1.8m (Feb. 18.33-34p3)
K12B23T 2012 BT23 (arc=29 days, H=19.0 ~537m) from LINEAR (Feb. 18.24-28p4) and Trueblood/KPNO (Feb. 18.29p4)
K12B23S 2012 BS23 (arc=30 days, H=21.5 ~170m) from Spacewatch 1.8m (Feb. 19.19p2)
K12A22T 2012 AT22 (arc=35 days, H=20.3 ~295m) from Schiaparelli Obs. (Feb. 7.08-09p2)
K12A11A 2012 AA11 (arc=35 days, H=20.1 ~323m) from ARO Westfield (Feb. 18.07-08p3)
K11Y15V 2011 YV15 (Q=4.394 AU, arc=3 opp, H=17.1 ~1.29 km) from CSS (Feb. 18.44-47p4)
K11X02S 2011 XS2 (arc=68 days, H=18.2 ~776m) from Spacewatch 1.8m (Feb. 19.11-12p3)
K11W69L 2011 WL69 (Q=4.580 AU, arc=83 days, H=19.4 ~446m) from Spacewatch 1.8m (Feb. 19.17-18p3)
K11SA2L 2011 SL102 (arc=3 opp, H=18.2 ~776m) from Kourovskaya Obs. (Jan. 30.62p2 & 30.68p2), ARO Westfield (Feb. 18.23-24p5), and Hamamatsu-Yuto Obs. (Feb. 18.46p1 & 18.51-54p6)
K06A08L 2006 AL8 (q=0.377 AU, Q=6.300 AU, arc=2 opp, H=18.4 ~708m) from Schiaparelli Obs. (Feb. 6.86p5)
K02R27D 2002 RD27 (Q=4.117 AU, arc=2 opp, H=17.7 ~977m) from CSS (Feb. 18.39-41p4)
J95F00J 1995 FJ (arc=3 opp, H=20.3 ~295m) from Spacewatch 1.8m (Feb. 18.53-54p3)
J95D01W 1995 DW1 (arc=3 opp, H=21.2 ~195m) from Spacewatch 1.8m (Feb. 18.52-53p3)
T4739 294739 2008 CM from LINEAR (Feb. 18.12-17p5)
R5792 275792 2001 QH142 from LINEAR (Feb. 18.30-35p5)
N7805 237805 2002 CF26 from Crni Vrh Obs. (Feb. 17.97-01p4)
K9924 209924 2005 WS55 from Kourovskaya Obs. (Feb. 1.62p1 & 1.69p3)
I9008 189008 1996 FR3 from Les Engarouines Obs. (Feb. 18.14-15p3)
G2038 162038 1996 DH from NEAT's GEODSS Haleakala telescope (1996 March 15.25-29p3)
F2941 152941 2000 FM10 from CSS (Feb. 18.22-24p4)
E2563 142563 2002 TR69 from Kourovskaya Obs. (Jan. 31.82p2, 31.90-95p4 & Feb. 2.83-87p5) and CSS (Feb. 18.52-54p4)
E2348 142348 2002 RX211 from Naef Obs. (Feb. 18.82-84p2)
D8524 138524 2000 OJ8 from Kourovskaya Obs. (Jan. 31.84p2, 31.89-93p3, Feb. 1.68p2 & 2.80-84p3)
D7925 137925 2000 BJ19 from CSS (Feb. 18.26-27p3)
A1873 101873 1999 NC5 from Kourovskaya Obs. (Jan. 31.83p2, 31.89-94p4, Feb. 1.67p1, 1.71-72p3 & 2.82-86p3)
85990 85990 1999 JV6 from CSS (Feb. 18.25-27p4)
32906 32906 1994 RH from Kourovskaya Obs. (Jan. 30.61p2 & 30.67p2) and CSS (Feb. 18.16-18p4)
16816 16816 1997 UF9 from Kourovskaya Obs. (Feb. 1.61p2 & 1.69p1)
03554 3554 Amun (1986 EB) from Mt. Tuffley Obs. (Feb. 19.09-10p3)
03352 3352 McAuliffe (1981 CW) from CSS (Feb. 18.50-52p4) and Mt. Tuffley Obs. (Feb. 19.07-08p3)
03103 3103 Eger (1982 BB) from Kourovskaya Obs. (Jan. 31.83p2, 31.89p2, Feb. 1.70p3 & 2.81-85p4), CSS (Feb. 18.22-24p4), and Mt. Tuffley Obs. (Feb. 19.06-07p3)
01862 1862 Apollo (1932 HA) from CSS (Feb. 18.41-43p4)
01036 1036 Ganymed (1924 TD) from LINEAR (Feb. 18.12-17p5)

Observers on 19 February '12

Sixteen observers appear in today's MPECs.

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield in Illinois, 13 in MPECs 2012-D22, 2012-D24 & 2012-D26 -- 2012 DY, 2012 CA21, 2012 CA, 2012 BO77, 2012 BL77, 2012 BJ86, 2012 BC124, 2012 AA11, 2011 YW62, 2011 SL102, 2008 JZ30, 99942, 175706
`703`	Catalina Sky Survey (CSS) in Arizona, 17 in MPECs 2012-D22, 2012-D23, 2012-D24 & 2012-D25 -- 2012 DZ, 2012 DY, 2012 DX, 2012 CC17, 2012 BB124, 2011 YV15, 2008 PF1, 2002 RD27, 85990, 32906, 152941, 142563, 141018, 137925, 3352, 3103, 1862
`106`	Crni Vrh Obs. in Slovenia, 1 in MPEC 2012-D22 -- 237805
`J95`	Great Shefford Obs. in England, 2 in MPEC 2012-D22 -- 2012 CP46, 2012 CA21
`379`	Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2012-D22 -- 2011 SL102, 141018
`695]`	Mark Trueblood via Kitt Peak Natl. Obs. (KPNO) in Arizona, 3 in MPEC 2012-D22 -- 2012 CA21, 2012 BT23, 2012 BN11
`168`	Kourovskaya Obs. in Russia, 8 in MPEC 2012-D22 -- 2011 SL102, 32906, 209924, 16816, 142563, 138524, 101873, 3103
`704`	LINEAR in New Mexico, 4 in MPEC 2012-D22 -- 2012 BT23, 294739, 275792, 1036
`A14`	Les Engarouines Obs. in France, 1 in MPEC 2012-D22 -- 189008
`900`	Moriyama Obs. in Japan, 2 in MPECs 2012-D23 & 2012-D25 -- 2012 DZ, 2012 DX
`J93`	Mt. Tuffley Obs. in England, 4 in MPEC 2012-D22 -- 3554, 3352, 3103, 433
`566`	NEAT's GEODSS Haleakala telescope in Hawaii, 1 in MPEC 2012-D22 -- 162038
`A13`	Naef Obs. in Switzerland, 1 in MPEC 2012-D22 -- 142348
`H36`	Sandlot Obs. in Kansas, 1 in MPEC 2012-D23 -- 2012 DX
`204`	Schiaparelli Obs. in Italy, 8 in MPEC 2012-D22 -- 2012 CC17, 2012 BM77, 2012 BC124, 2012 BB124, 2012 AT22, 2006 CJ, 2006 AL8, 2002 AW
`291`	Spacewatch 1.8m telescope in Arizona, 16 in MPEC 2012-D22 -- 2012 CS, 2012 CP2, 2012 CM29, 2012 CL29, 2012 CL19, 2012 CC29, 2012 BZ76, 2012 BS23, 2012 BJ86, 2012 BJ134, 2011 XS2, 2011 WQ46, 2011 WL69, 2011 VO5, 1995 FJ, 1995 DW1

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

Impact Risk Monitoring on 19 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 DZ	JPL Sentry	1800	2052-2103	3	2.9e-09	-9.02	-9.15	0	JPL: "Analysis based on 12 observations spanning .15222 days (2012-Feb-19.41414 to 2012-Feb-19.56636)." Diameter approximately 0.022 km. from mean, weighted H=26.0.

2012 DX	JPL Sentry	1832	2092-2111	70	2.9e-05	-5.82	-6.68	0	JPL: "Analysis based on 20 observations spanning .35501 days (2012-Feb-19.26892 to 2012-Feb-19.62393)." Diameter approximately 0.013 km. from mean, weighted H=27.1.

2012 DN	NEODyS	1711	2021-2090	15	2.9e-09	-4.52	-4.91	0	NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2012-02-16.523 to 2012-02-18.463."

2012 CS46	JPL Sentry	0108	2019-2109	120	4.0e-07	-7.71	-8.45	0	JPL: "Analysis based on 6 observations spanning 1.0036 days (2012-Feb-14.36119 to 2012-Feb-15.364751)." Diameter approximately 0.009 km. from mean, weighted H=27.8.

2012 CQ46	JPL Sentry	0032	2040-2084	3	1.3e-08	-8.66	-8.67	0	JPL: "Analysis based on 7 observations spanning 2.0613 days (2012-Feb-13.31124 to 2012-Feb-15.372533)." Diameter approximately 0.012 km. from mean, weighted H=27.2.

2012 CC29	NEODyS	1711	R E M O V E D						-
2012 CC29	JPL Sentry	1711	R E M O V E D						JPL: Risk listing removed at 0952 UTC.

2012 CA21	NEODyS	1711	2043-2078	3	9.83e-06	-2.08	-2.14	1	NEODyS: "Based on 52 optical observations (of which 3 are rejected as outliers) from 2012-02-12.121 to 2012-02-19.112."

2012 BJ86	JPL Sentry	1711	2105-2112	3	4.8e-07	-4.85	-4.97	0	JPL: "Analysis based on 45 observations spanning 21.032 days (2012-Jan-29.10142 to 2012-Feb-19.13388)." Diameter approximately 0.160 km. from mean, weighted H=21.6.
2012 BJ86	NEODyS	1711	R E M O V E D						-

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 19 February '12

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

1832	Noted that JPL Sentry has posted 2012 DX as an impact risk - see above
1820	Updated Traffic Report
1800	Noted that JPL Sentry has posted 2012 DZ as an impact risk - see above
1740	Grabbed MPEC 2012-D26 - 2008 JZ30 - see above
1711	Noted that JPL Sentry has updated its 2012 BJ86 risk assessment - see above Noted that NEODyS has removed 2012 BJ86 as an impact risk - see above Noted that NEODyS has updated its 2012 CA21 risk assessment - see above Noted that JPL Sentry has removed 2012 CC29 as an impact risk - see above Noted that NEODyS has removed 2012 CC29 as an impact risk - see above Noted that NEODyS has posted 2012 DN as an impact risk - see above Grabbed MPEC 2012-D22 - Daily Orbit Update - see above Grabbed MPEC 2012-D23 - 2012 DX - see above Grabbed MPEC 2012-D24 - 2012 DY - see above Grabbed MPEC 2012-D25 - 2012 DZ - see above
0108	Noted that JPL Sentry has posted 2012 CS46 as an impact risk - see above
0032	Noted that JPL Sentry has posted 2012 CQ46 as an impact risk - see above

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