Contents  on 27 February '12

Asteroid/Comet Connection (A/CC) Resources:

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Traffic Report  on 27 February '12

Five objects reported inside ten LD

Five visitors are reported moving inside ten lunar distances (LD) of Earth today. Risk-listed 2012 CS46 is calculated with great uncertainty to exit Earth's Hill sphere while further out, 2012 DS32 travels from 6.59 to 4.62 LD, radar target 2012 DX13 departs from within ten LD, moving from 8.91 to 13.84 LD, 2012 DN31 comes inside, moving from 10.46 to 9.45 LD, and 2012 DM32 leaves ten LD, passing from 9.91 to 11.38 LD.

Headed our way, 2012 DR32 arrives inside ten LD on March 1st and 2008 EJ85 arrives inside ten LD on March 4th.

This report was updated at 0114 Feb. 28th UTC with new discovery, tiny departed Earth-buzzing 2012 DU32 (MPEC) and, earlier, discoveries 2012 DS32 (MPEC), 2012 DR32 (MPEC), and 2012 DM32 (MPEC), and follow-up in today's DOU MPEC for 2012 DN31 and 2012 DA14. This report was previously updated at 0052, 0358, and 1645 on the 27th UTC.


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. Distances are interpreted by A/CC from JPL Horizons data. See also today's timeline, current sky chart and object details (alt-details), and ephemerides.

NEOCP Activity  on 27 February '12

The MPC's NEO Confirmation Page has 40 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 40 objects listed. Of these, 23 were "one nighters." The Tracking News counted a total of 66 listings on the NEOCP on this day.

New MPECs  on 27 February '12

Minor Planet Electronic Circulars

There were eighteen MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2012-D92 - "23:20 UT" - 2008 CE119


MPEC 2012-D91 - "22:02 UT" - 2012 DU32


MPEC 2012-D90 - "21:40 UT" - 2012 DA33


MPEC 2012-D89 - "21:32 UT" - 2012 DZ32


MPEC 2012-D88 - "21:26 UT" - 2012 DY32


MPEC 2012-D87 - "21:24 UT" - 2012 DX32


MPEC 2012-D86 - "21:21 UT" - 2012 DW32


MPEC 2012-D85 - "21:18 UT" - 2012 DV32


MPEC 2012-D84 - "21:16 UT" - 2012 CA55


MPEC 2012-D83 - "19:02 UT" - 2012 DT32


MPEC 2012-D82 - "18:19 UT" - 2007 JF22


<< DOU on 27 Feb. '12 >>  MPEC 2012-D81 - "06:04 UT" - Daily Orbit Update


MPEC 2012-D80 - "01:19 UT" - 2012 DS32


MPEC 2012-D79 - "01:16 UT" - 2012 DR32


MPEC 2012-D78 - "01:14 UT" - 2012 DQ32


MPEC 2012-D77 - "01:12 UT" - 2012 DP32


MPEC 2012-D76 - "01:05 UT" - 2012 DM32


MPEC 2012-D75 - "00:04 UT" - 2004 PS92

Observers  on 27 February '12

A total of 40 observers appeared in this day's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 23 in MPECs 2012-D75, 2012-D76, 2012-D77, 2012-D78, 2012-D79, 2012-D80, 2012-D81, 2012-D84, 2012-D85, 2012-D86 & 2012-D88 -- 2012 DY32, 2012 DW32, 2012 DV32, 2012 DS32, 2012 DR32, 2012 DQ32, 2012 DP32, 2012 DP, 2012 DM32, 2012 DK4, 2012 DK14, 2012 CA55, 2012 CA21, 2012 BT61, 2012 BT23, 2012 BS23, 2012 BJ86, 2011 XD1, 2005 NE7, 2004 PS92, 2002 NX18, 1996 TE9, 99942
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2012-D81 -- 2012 BT23
300Bisei Spaceguard Center in Japan, 5 in MPECs 2012-D76, 2012-D80, 2012-D84, 2012-D85 & 2012-D86 -- 2012 DW32, 2012 DV32, 2012 DS32, 2012 DM32, 2012 CA55
703Catalina Sky Survey (CSS) in Arizona, 21 in MPECs 2012-D77, 2012-D79, 2012-D80, 2012-D81, 2012-D84, 2012-D86, 2012-D89, 2012-D91 & 2012-D92 -- 2012 DZ32, 2012 DW32, 2012 DU32, 2012 DU30, 2012 DS32, 2012 DR32, 2012 DP32, 2012 CA55, 2011 WV134, 2010 SV3, 2008 CE119, 89959, 85236, 68267, 192642, 153951, 138524, 137802, 7977, 2061, 1943
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPECs 2012-D81, 2012-D84, 2012-D85 & 2012-D88 -- 2012 DY32, 2012 DV32, 2012 DP32, 2012 CA55
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2012-D78 -- 2012 DQ32
I17Cupillari Obs. in Pennsylvania, 5 in MPEC 2012-D81 -- 32906, 192642, 153951, 143651, 138013
448Desert Moon Obs. in New Mexico, 3 in MPEC 2012-D81 -- 2001 HA8, 311044, 267221
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2012-D78 -- 2012 DQ32
I19El Gato Gris Obs. in Argentina, 1 in MPEC 2012-D84 -- 2012 CA55
595Farra d'Isonzo Obs. in Italy, 3 in MPECs 2012-D76, 2012-D80 & 2012-D88 -- 2012 DY32, 2012 DS32, 2012 DM32
157Frasso Sabino Obs. in Italy, 6 in MPEC 2012-D81 -- 2012 DZ13, 2012 DH4, 2012 CD29, 2012 CC17, 2003 EO16, 278381
203GiaGa Obs. in Italy, 2 in MPECs 2012-D78 & 2012-D81 -- 2012 DQ32, 2012 DN31
651Grasslands Obs. in Arizona, 8 in MPECs 2012-D76, 2012-D77, 2012-D78, 2012-D79, 2012-D80, 2012-D85, 2012-D86 & 2012-D88 -- 2012 DY32, 2012 DW32, 2012 DV32, 2012 DS32, 2012 DR32, 2012 DQ32, 2012 DP32, 2012 DM32
J95Great Shefford Obs. in England, 8 in MPECs 2012-D75, 2012-D76, 2012-D77, 2012-D78, 2012-D79, 2012-D80, 2012-D86 & 2012-D87 -- 2012 DX32, 2012 DW32, 2012 DS32, 2012 DR32, 2012 DQ32, 2012 DP32, 2012 DM32, 2004 PS92
B15Inastars Obs. in Germany, 1 in MPEC 2012-D78 -- 2012 DQ32
704LINEAR in New Mexico, 10 in MPECs 2012-D78, 2012-D81 & 2012-D85 -- 2012 DV32, 2012 DS30, 2012 DQ32, 29075, 20826, 184990, 163696, 143651, 137925, 1866
950.Ovidiu Vaduvescu via La Palma in the Canary Islands, 9 in MPECs 2012-D81 & 2012-D82 -- 2012 DZ13, 2012 DC28, 2012 CR36, 2012 CC29, 2012 BB14, 2009 WG54, 2007 JF22, 2005 QQ30, 2004 PS92
J75La Sagra Obs. in Spain, 1 in MPEC 2012-D81 -- 2012 DA14
C94MASTER-II Obs. Tunka in Russia, 1 in MPEC 2012-D81 -- 24475
H01Magdalena Ridge Obs. (MRO) in New Mexico, 10 in MPECs 2012-D75, 2012-D76, 2012-D77, 2012-D79, 2012-D80, 2012-D81, 2012-D85, 2012-D86, 2012-D87 & 2012-D90 -- 2012 DX32, 2012 DW32, 2012 DV32, 2012 DU30, 2012 DS32, 2012 DR32, 2012 DP32, 2012 DM32, 2012 DA33, 2004 PS92
B90Malina River Obs. in Italy, 2 in MPECs 2012-D79 & 2012-D80 -- 2012 DS32, 2012 DR32
B28Mandi Obs. in Italy, 1 in MPEC 2012-D81 -- 2012 DK31
118Modra Obs. in Slovakia, 2 in MPECs 2012-D84 & 2012-D88 -- 2012 DY32, 2012 CA55
A99Monte Baldo Obs. in Italy, 1 in MPEC 2012-D80 -- 2012 DS32
C91Montevenere Obs., 1 in MPEC 2012-D81 -- 24475
474Mt. John Obs. in New Zealand, 4 in MPECs 2012-D77, 2012-D81 & 2012-D84 -- 2012 DP32, 2012 DO, 2012 CA55, 162421
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2012-D75, 2012-D76, 2012-D81, 2012-D83, 2012-D84, 2012-D87, 2012-D88 & 2012-D90 -- 2012 DY32, 2012 DX32, 2012 DT32, 2012 DO8, 2012 DM32, 2012 DA33, 2012 CA55, 2011 XM1, 2010 DO, 2004 PS92, 53435, 159504
A13Naef Obs. in Switzerland, 2 in MPEC 2012-D81 -- 2002 RD27, 136618
A24New Millennium Obs. in Italy, 7 in MPECs 2012-D76, 2012-D78, 2012-D79, 2012-D80, 2012-D85, 2012-D86 & 2012-D88 -- 2012 DY32, 2012 DW32, 2012 DV32, 2012 DS32, 2012 DR32, 2012 DQ32, 2012 DM32
F51Pan-STARRS 1 (PS1) in Hawaii, 14 in MPECs 2012-D75, 2012-D81, 2012-D82, 2012-D85 & 2012-D92 -- 2012 DV32, 2012 CK2, 2011 YV15, 2009 HC82, 2008 CE119, 2007 JF22, 2004 PS92, 312942, 276049, 275976, 238063, 138205, 5620, 3271
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 14 in MPEC 2012-D81 -- 2012 DQ8, 2012 CC17, 2012 BT23, 2012 BC20, 2011 YV15, 2010 SV3, 2006 VY13, 2002 AW, 1998 KN3, 29075, 263976, 162186, 154269, 143651
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2012-D81, 2012-D84 & 2012-D92 -- 2012 DU30, 2012 CA55, 2008 CE119
104San Marcello Pistoiese Obs. in Italy, 6 in MPECs 2012-D75, 2012-D76, 2012-D77, 2012-D79, 2012-D81 & 2012-D88 -- 2012 DY32, 2012 DR32, 2012 DP32, 2012 DN31, 2012 DM32, 2004 PS92
H36Sandlot Obs. in Kansas, 3 in MPECs 2012-D81, 2012-D84 & 2012-D88 -- 2012 DY32, 2012 DU30, 2012 CA55
204Schiaparelli Obs. in Italy, 10 in MPECs 2012-D76, 2012-D77, 2012-D78, 2012-D79, 2012-D80, 2012-D81 & 2012-D86 -- 2012 DW32, 2012 DU30, 2012 DS32, 2012 DR32, 2012 DQ32, 2012 DP32, 2012 DM32, 2012 DK14, 2007 BG29, 2006 WU
691Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2012-D81 & 2012-D85 -- 2012 DV32, 2012 DO8, 2007 UR3, 2003 NO4, 18109, 16912
291Spacewatch 1.8m telescope in Arizona, 15 in MPECs 2012-D75, 2012-D80, 2012-D81, 2012-D83, 2012-D84, 2012-D85, 2012-D86, 2012-D87, 2012-D88, 2012-D89, 2012-D90, 2012-D91 & 2012-D92 -- 2012 DZ32, 2012 DY32, 2012 DX32, 2012 DW32, 2012 DV32, 2012 DU32, 2012 DU30, 2012 DT32, 2012 DS32, 2012 DA33, 2012 CA55, 2010 SO16, 2010 DO, 2008 CE119, 2004 PS92
I93St. Pardon de Conques Obs. in France, 10 in MPECs 2012-D76, 2012-D77, 2012-D78, 2012-D79, 2012-D80, 2012-D81, 2012-D84, 2012-D86, 2012-D88 & 2012-D92 -- 2012 DY32, 2012 DW32, 2012 DS32, 2012 DR32, 2012 DQ32, 2012 DP32, 2012 DM32, 2012 DK31, 2012 CA55, 2008 CE119
C44Volta Obs. in Italy, 3 in MPECs 2012-D78, 2012-D80 & 2012-D85 -- 2012 DV32, 2012 DS32, 2012 DQ32
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 27 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 DZ32JPL Sentry23002088-210341.7e-09-7.26-7.630JPL: "Analysis based on 19 observations spanning .96896 days (2012-Feb-26.3665 to 2012-Feb-27.33546)." Diameter approximately 0.191 km. from mean, weighted H=21.2.
2012 DY32JPL Sentry23592020-2107715.4e-07-5.18-5.510JPL: "Analysis based on 39 observations spanning .91963 days (2012-Feb-26.2587 to 2012-Feb-27.178331)." Diameter approximately 0.098 km. from mean, weighted H=22.7.
2012 DA14JPL Sentry16452020-20571172.2e-04-3.20-4.050JPL: "Analysis based on 35 observations spanning 4.0246 days (2012-Feb-23.03431 to 2012-Feb-27.058938)." Diameter approximately 0.049 km. from mean, weighted H=24.2.
NEODyS07242020-20903253.33e-04-3.11-3.950NEODyS: "Based on 34 optical observations (of which 2 are rejected as outliers) from 2012-02-23.029 to 2012-02-26.111."
2012 CA21NEODyS16452073-207313.18e-07-3.61-3.610NEODyS: "Based on 84 optical observations (of which 3 are rejected as outliers) from 2012-02-12.121 to 2012-02-26.050."
2012 BJ86JPL Sentry1645211212.8e-07-5.09-5.090JPL: "Analysis based on 63 observations spanning 28.023 days (2012-Jan-29.10142 to 2012-Feb-26.12406)." Diameter approximately 0.160 km. from mean, weighted H=21.6.
NEODyS16452090-209014.67e-08-5.80-5.80NEODyS: "Based on 55 optical observations (of which 0 are rejected as outliers) from 2012-01-29.102 to 2012-02-26.125."

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 27 February '12

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

0114 2/28Updated Traffic Report
2359Noted that JPL Sentry has posted 2012 DY32 as an impact risk - see above
Grabbed MPEC 2012-D92 - 2008 CE119 - see above
2300Noted that JPL Sentry has posted 2012 DZ32 as an impact risk - see above
2238Grabbed MPEC 2012-D91 - 2012 DU32 - see above
2151Grabbed MPEC 2012-D84 - 2012 CA55 - see above
Grabbed MPEC 2012-D85 - 2012 DV32 - see above
Grabbed MPEC 2012-D86 - 2012 DW32 - see above
Grabbed MPEC 2012-D87 - 2012 DX32 - see above
Grabbed MPEC 2012-D88 - 2012 DY32 - see above
Grabbed MPEC 2012-D89 - 2012 DZ32 - see above
Grabbed MPEC 2012-D90 - 2012 DA33 - see above
1903Grabbed MPEC 2012-D82 - 2007 JF22 - see above
Grabbed MPEC 2012-D83 - 2012 DT32 - see above
1645Noted that JPL Sentry has updated its 2012 BJ86 risk assessment - see above
Noted that NEODyS has updated its 2012 BJ86 risk assessment - see above
Noted that NEODyS has updated its 2012 CA21 risk assessment - see above
Noted that JPL Sentry has updated its 2012 DA14 risk assessment - see above
Grabbed MPEC 2012-D81 - Daily Orbit Update - see above
0724Noted that NEODyS has updated its 2012 DA14 risk assessment - see above
0131Grabbed MPEC 2012-D76 - 2012 DM32 - see above
Grabbed MPEC 2012-D77 - 2012 DP32 - see above
Grabbed MPEC 2012-D78 - 2012 DQ32 - see above
Grabbed MPEC 2012-D79 - 2012 DR32 - see above
Grabbed MPEC 2012-D80 - 2012 DS32 - see above
0050Grabbed MPEC 2012-D75 - 2004 PS92 - see above