2008 EA9 orbit diagram 
adapted from JPL Orbit Viewer

Earth has had an unknown traveling companion since December. Initially hidden in the daytime sky, 2008 EA9 slowly passed to Earth's outside and into our night, where the Mt. Lemmon Survey caught it early last Thursday (see today's MPEC 2008-E79 below). It is calculated to have been within ten lunar distances (LD) of Earth from Dec. 28th until yesterday, coming to 0.6 LD from the Moon on Feb. 4th and 1.6 LD from Earth the day before. This illustration is an A/CC composite from JPL's Orbit Viewer. See more details.


Contents  on 10 March '08

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.

NEOCP Activity  on 10 March '08

The MPC's NEO Confirmation Page has 19 listings: 8 new, 11 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had eight new and eleven updated listings. Of these, fourteen were "one nighters." So far The Tracking News has counted a total of 33 objects listed on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

New MPECs  on 10 March '08

Minor Planet Electronic Circulars

As of last check at 2354 UTC, there have been fourteen MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-E86 - "20:49 UT" - 2008 EM9


MPEC 2008-E85 - "20:45 UT" - 2008 EJ9


MPEC 2008-E84 - "20:24 UT" - 2008 EG9


MPEC 2008-E83 - "20:13 UT" - 2008 EF9


MPEC 2008-E82 - "19:31 UT" - 2008 EM8


MPEC 2008-E81 - "18:03 UT" - 2008 EE9


MPEC 2008-E80 - "17:43 UT" - 2008 EB9


MPEC 2008-E79 - "15:28 UT" - 2008 EA9


<< DOU on 10 Mar. '08 >>  MPEC 2008-E78 - "06:09 UT" - Daily Orbit Update


MPEC 2008-E77 - "03:27 UT" - Observations of Comets


MPEC 2008-E76 - "03:12 UT" - Comet C/2008 E1 (Catalina)


MPEC 2008-E75 - "03:09 UT" - Comet C/2008 C1 (Chen-Gao)


MPEC 2008-E74 - "03:05 UT" - Comet P/2008 A2 (LINEAR)


MPEC 2008-E73 - "03:02 UT" - Comet C/2008 A1 (McNaught)

Observers  on 10 March '08

A total of 81 observing facilities appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 9 in MPECs 2008-E75 & 2008-E77 -- C/2008 C1, C/2007 Y1, C/2007 W1, C/2007 T1, C/2007 G1, C/2007 D3, C/2002 VQ94, 192P, 93P
169Airali Obs. in Italy, 1 in MPEC 2008-E78 -- 153591
B03Alter Satzberg Obs. in Austria, 2 in MPECs 2008-E78 & 2008-E83 -- 2008 EF9, 2008 ED8
B37Ametlla del Valles Obs. in Spain, 11 in MPEC 2008-E77 -- C/2007 M2, C/2007 B2, C/2006 S5, P/2005 SB216, C/2002 VQ94, 183P, 180P, 172P, 79P, 70P, 65P
A50Andrushivka Obs. in the Ukraine, 6 in MPEC 2008-E78 -- 2008 EX5, 2008 ET7, 2008 EQ7, 2008 EP7, 2008 EN7, 2008 EM7
H55Astronomical Research Obs. (ARO) in Illinois, 2 in MPECs 2008-E80 & 2008-E83 -- 2008 EF9, 2008 EB9
J51Atlante Obs. in the Canary Islands, 10 in MPEC 2008-E77 -- C/2007 W1, C/2007 M2, C/2007 G1, C/2007 D1, C/2007 B2, C/2005 L3, 180P, 124P, 70P, 65P
467Auckland Obs. in New Zealand, 2 in MPEC 2008-E77 -- C/2006 Q1, C/2006 K4
A81Balzaretto Obs. in Italy, 1 in MPEC 2008-E78 -- 54686
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2008-E77 -- P/2008 E2
B59Borken Obs. in Germany, 1 in MPEC 2008-E77 -- C/2007 B2
215Buchloe Obs. in Germany, 2 in MPECs 2008-E76 & 2008-E77 -- C/2008 E1, 188P
J79Calarreona Obs. in Spain, 1 in MPEC 2008-E77 -- 17P
J96Cantabria Obs. in Spain, 5 in MPEC 2008-E77 -- P/2007 C2, C/2007 B2, 110P, 70P, 29P
B20Carmelita Obs. in Spain, 2 in MPEC 2008-E77 -- 124P, 70P
703Catalina Sky Survey (CSS) in Arizona, 12 in MPECs 2008-E77, 2008-E78, 2008-E81 & 2008-E85 -- 2008 EJ9, 2008 EE9, P/2008 E2, 2008 DW, P/2007 VQ11, C/2007 M2, P/2005 SB216, 68359, 6037, 4954, 191P, 183P
A77Chante-Perdrix Obs. in France, 3 in MPECs 2008-E75 & 2008-E77 -- C/2008 C1, C/2006 S5, 46P
0952Vasiliy Rumyantsev via Crimean Astrophysical Obs. in the Ukraine, 1 in MPEC 2008-E78 -- 2008 EZ7
448Desert Moon Obs. in New Mexico, 4 in MPEC 2008-E78 -- 2008 EJ, 2008 DW, 2008 DL5, 2008 DG5
J36El Olivo Obs. in Spain, 6 in MPEC 2008-E77 -- C/2007 T5, 124P, 65P, 46P, 29P, 17P
734Farpoint Obs. in Kansas, 1 in MPEC 2008-E80 -- 2008 EB9
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-E77 -- 70P
651Grasslands Obs. in Arizona, 1 in MPEC 2008-E83 -- 2008 EF9
J95Great Shefford Obs. in England, 6 in MPECs 2008-E77, 2008-E78, 2008-E80, 2008-E83 & 2008-E85 -- 2008 EZ7, 2008 EJ9, 2008 EF9, 2008 ED8, 2008 EB9, P/2008 E2
458Guadarrama Obs. in Spain, 1 in MPEC 2008-E75 -- C/2008 C1
442Gualba Obs. in Spain, 2 in MPEC 2008-E77 -- 46P, 29P
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2008-E77 -- 17P
D88Hiratsuka Obs., 5 in MPEC 2008-E77 -- C/2007 W1, C/2007 M2, C/2007 D1, C/2007 B2, 70P
B15Inastars Obs. in Germany, 1 in MPEC 2008-E78 -- 138175
G92Jarnac Obs. in Arizona, 1 in MPEC 2008-E77 -- C/2007 G1
701Junk Bond Obs. in Arizona, 2 in MPECs 2008-E76 & 2008-E77 -- P/2008 E2, C/2008 E1
246KLENOT in the Czech Republic, 5 in MPECs 2008-E78, 2008-E80, 2008-E81, 2008-E83 & 2008-E85 -- 2008 EM7, 2008 EJ9, 2008 EF9, 2008 EE9, 2008 EB9
415Kambah Obs. in the Australian Capital Territory, 7 in MPEC 2008-E77 -- C/2007 Y2, C/2007 W1, C/2007 T1, C/2006 XA1, C/2006 Q1, C/2006 E1, 8P
585Kiev Comet Station in the Ukraine, 6 in MPECs 2008-E74, 2008-E75, 2008-E76 & 2008-E77 -- C/2008 E1, C/2008 C1, P/2008 A2, 183P, 50P, 17P
046Klet Obs. in the Czech Republic, 6 in MPECs 2008-E77, 2008-E78 & 2008-E83 -- 2008 EF9, 2008 ED8, C/2007 W1, 2007 RX19, 2006 DU62, 124P
704LINEAR in New Mexico, 18 in MPECs 2008-E77, 2008-E78, 2008-E83 & 2008-E85 -- 2008 EJ9, 2008 EF9, C/2007 U1, C/2007 S2, C/2007 M2, 2006 DU62, 2005 RD34, 2005 EK70, 96189, 5587, 191P, 183P, 110P, 93P, 79P, 74P, 70P, 50P
699LONEOS in Arizona, 3 in MPEC 2008-E77 -- 183P, 180P, 172P
J87La Canada Obs. in Spain, 1 in MPEC 2008-E82 -- 2008 EM8
J76La Murta Obs. in Spain, 10 in MPECs 2008-E75 & 2008-E77 -- C/2008 C1, C/2007 W1, C/2007 M2, C/2007 B2, C/2006 W3, C/2006 S5, 93P, 46P, 29P, 17P
J38La Vara Obs. in Spain, 10 in MPECs 2008-E75 & 2008-E77 -- C/2008 C1, C/2007 W1, C/2007 T5, C/2006 W3, C/2006 S5, 110P, 93P, 46P, 29P, 17P
304Las Campanas Obs. in Chile, 1 in MPEC 2008-E78 -- 1994 AW1
J59Linceo Obs. in Spain, 1 in MPEC 2008-E77 -- C/2006 S5
J55Los Altos de Arguineguin Obs. in the Canary Islands, 2 in MPEC 2008-E77 -- C/2006 W3, C/2006 S5
130Lumezzane Obs. in Italy, 2 in MPEC 2008-E77 -- C/2006 W3, 70P
J40Malaga Obs. in Spain, 6 in MPEC 2008-E77 -- C/2007 B2, 110P, 70P, 65P, 46P, 29P
711McDonald Obs. in Texas, 2 in MPECs 2008-E77 & 2008-E80 -- 2008 EB9, P/2008 E2
118Modra Obs. in Slovakia, 7 in MPECs 2008-E74, 2008-E75 & 2008-E77 -- C/2008 C1, P/2008 A2, P/2007 VQ11, C/2007 S2, C/2007 M2, C/2007 D3, P/2007 C2
J46Montana Blanca Obs. in the Canary Islands, 1 in MPEC 2008-E76 -- C/2008 E1
213Montcabre Obs. in Spain, 5 in MPEC 2008-E77 -- C/2007 B2, C/2006 W3, 70P, 29P, 17P
945Monte Deva Obs. in Spain, 9 in MPECs 2008-E75 & 2008-E77 -- C/2008 C1, C/2007 W1, C/2007 M2, C/2007 B2, C/2006 W3, C/2006 S5, 110P, 70P, 46P
900Moriyama Obs. in Japan, 6 in MPECs 2008-E75 & 2008-E77 -- C/2008 C1, C/2007 Y1, C/2007 T1, 110P, 29P, 17P
474Mt. John Obs. in New Zealand, 3 in MPECs 2008-E81, 2008-E85 & 2008-E86 -- 2008 EM9, 2008 EJ9, 2008 EE9
G96Mt. Lemmon Survey (MLS) in Arizona, 13 in MPECs 2008-E77, 2008-E78, 2008-E79, 2008-E80, 2008-E82, 2008-E83, 2008-E84 & 2008-E85 -- 2008 EM8, 2008 EJ9, 2008 EG9, 2008 EF9, 2008 EB9, 2008 EA9, C/2007 M2, 2004 DG2, 86324, 163902, 172P, 148P, 93P
J93Mt. Tuffley Obs. in England, 3 in MPECs 2008-E77 & 2008-E78 -- 1036, 124P, 93P
A13Naef Obs. in Switzerland, 1 in MPEC 2008-E82 -- 2008 EM8
J47Nazaret Obs. in Spain, 12 in MPECs 2008-E76 & 2008-E77 -- P/2008 E2, C/2008 E1, C/2007 B2, C/2006 S5, 173P, 70P, 65P, 46P, 29P, 22P, 17P, 7P
423North Ryde Obs. in New South Wales, 6 in MPECs 2008-E73 & 2008-E77 -- C/2008 A1, C/2007 Y2, C/2007 Q3, C/2006 Q1, C/2006 K4, 8P
224Ottmarsheim Obs. in France, 1 in MPEC 2008-E77 -- 172P
B49Paus Obs. in Spain, 2 in MPEC 2008-E77 -- 180P, 7P
941Pla D'Arguines Obs. in Spain, 1 in MPEC 2008-E82 -- 2008 EM8
D29Purple Mtn. Obs. XuYi Station in China, 6 in MPEC 2008-E77 -- C/2007 M2, C/2007 D1, C/2007 B2, 172P, 70P, 22P
J42Puzol Obs. in Spain, 2 in MPEC 2008-E77 -- 180P, 110P
H68Red Barn Obs. in Georgia, 1 in MPEC 2008-E83 -- 2008 EF9
A41Rezman Obs. in Slovenia, 9 in MPEC 2008-E77 -- C/2007 Y1, C/2007 T5, C/2007 S2, C/2006 S5, P/2005 SB216, 180P, 124P, 65P, 7P
939Rodeno Obs. in Spain, 3 in MPECs 2008-E75 & 2008-E77 -- C/2008 C1, C/2006 W3, 46P
461SZTE Asteroid Program in Hungary, 1 in MPEC 2008-E77 -- C/2002 VQ94
854Sabino Canyon Obs. in Arizona, 5 in MPECs 2008-E77, 2008-E80, 2008-E81, 2008-E85 & 2008-E86 -- 2008 EM9, 2008 EJ9, 2008 EE9, 2008 EB9, P/2008 E2
204Schiaparelli Obs. in Italy, 14 in MPEC 2008-E77 -- C/2007 U1, C/2007 T5, C/2007 S2, P/2007 C2, C/2006 W3, C/2006 S5, C/2005 E2, 192P, 173P, 166P, 148P, 79P, 74P, 65P
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2008-E78, 2008-E81 & 2008-E86 -- 2008 EP6, 2008 EM9, 2008 EE9
071Smolyan Obs. in Bulgaria, 10 in MPEC 2008-E77 -- C/2007 G1, C/2007 B2, C/2006 W3, C/2005 L3, 173P, 124P, 74P, 65P, 29P, 17P
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2008-E78 & 2008-E80 -- 2008 EB9, 9400, 5836, 5646
291Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2008-E78, 2008-E79, 2008-E80, 2008-E84 & 2008-E85 -- 2008 EX5, 2008 ER7, 2008 EO7, 2008 EN6, 2008 EM7, 2008 EJ9, 2008 EG9, 2008 EB9, 2008 EA9, 2008 DA4
A97Stammersdorf Obs. in Austria, 5 in MPECs 2008-E75, 2008-E77 & 2008-E78 -- 2008 ED8, C/2008 C1, 46P, 29P, 17P
B30Szamotuly-Galowo Obs. in Poland, 13 in MPECs 2008-E75 & 2008-E77 -- C/2008 C1, C/2007 W1, C/2006 W3, C/2006 S5, C/2005 L3, 180P, 173P, 93P, 65P, 50P, 46P, 17P, 7P
B18Terskol Obs. in Russia, 1 in MPEC 2008-E78 -- 153591
G69Thousand Oaks Obs. in southern California, 1 in MPEC 2008-E78 -- 2002 TD66
J35Tucci Obs. in Spain, 2 in MPEC 2008-E77 -- 110P, 46P
J30Ventilla Obs., 1 in MPEC 2008-E77 -- 46P
B42Vitebsk Obs. in Belarus, 8 in MPEC 2008-E77 -- P/2008 E2, C/2007 W1, C/2007 B2, C/2006 S5, 70P, 65P, 22P, 7P
C42Xingming Obs. in China, 2 in MPEC 2008-E77 -- C/2007 W1, 46P
367Yatsuka Obs., 4 in MPECs 2008-E75 & 2008-E77 -- C/2008 C1, C/2006 W3, 93P, 46P

Impact Risk Monitoring  on 10 March '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2354 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.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) 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
2008 EA9JPL Sentry17082076-209632.4e-07-8.37-8.530JPL: "Analysis based on 21 observations spanning 4.0014 days (2008-Mar-06.40551 to 2008-Mar-10.40687)." Diameter approximately 0.010 km. from mean, weighted H=27.7.
2008 ED8JPL Sentry1557R E M O V E DJPL: Risk listing removed at 1138 UTC.
2008 ER7NEODyS17092014-20901363.55e-06-2.96-3.480NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2008/03/06.337 to 2008/03/09.339."
JPL Sentry15572014-21074772.0e-05-2.41-2.840JPL: "Analysis based on 21 observations spanning 3.0025 days (2008-Mar-06.33608 to 2008-Mar-09.33853)." Diameter approximately 0.291 km. from mean, weighted H=20.3.
2008 EO7NEODyS1557R E M O V E D
2008 EM7JPL Sentry15572014-2102372.4e-06-3.59-4.250JPL: "Analysis based on 37 observations spanning 3.6640 days (2008-Mar-06.25767 to 2008-Mar-09.92166)." Diameter approximately 0.190 km. from mean, weighted H=21.3.
NEODyS15572014-2089262.45e-06-3.59-4.130NEODyS: "Based on 38 optical observations (of which 1 are rejected as outliers) from 2008/03/06.258 to 2008/03/09.922."
2008 EN6JPL Sentry1557R E M O V E DJPL: Risk listing removed at 1128 UTC.
2008 EX5JPL Sentry15572049-21011113.2e-05-4.11-5.060JPL: "Analysis based on 31 observations spanning 4.9303 days (2008-Mar-04.39523 to 2008-Mar-09.3255)." Diameter approximately 0.061 km. from mean, weighted H=23.7.
NEODyS15572044-20901472.44e-05-4.19-5.050NEODyS: "Based on 32 optical observations (of which 1 are rejected as outliers) from 2008/03/04.396 to 2008/03/09.326."
2008 DA4JPL Sentry1557210013.0e-07-6.31-6.310JPL: "Analysis based on 58 observations spanning 10.998 days (2008-Feb-27.28072 to 2008-Mar-09.27856)." Diameter approximately 0.055 km. from mean, weighted H=24.0.

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 10 March '08

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

2058Grabbed MPEC 2008-E85 - 2008 EJ9 - see above
Grabbed MPEC 2008-E86 - 2008 EM9 - see above
2033Grabbed MPEC 2008-E83 - 2008 EF9 - see above
Grabbed MPEC 2008-E84 - 2008 EG9 - see above
1957Grabbed MPEC 2008-E82 - 2008 EM8 - see above
1859Grabbed MPEC 2008-E81 - 2008 EE9 - see above
1801Grabbed MPEC 2008-E80 - 2008 EB9 - see above
1709Noted that NEODyS has updated its 2008 ER7 risk assessment - see above
1708Noted that JPL Sentry has posted 2008 EA9 as an impact risk - see above
1557Noted that JPL Sentry has updated its 2008 DA4 risk assessment - see above
Noted that JPL Sentry has removed 2008 ED8 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 EM7 risk assessment - see above
Noted that NEODyS has updated its 2008 EM7 risk assessment - see above
Noted that JPL Sentry has removed 2008 EN6 as an impact risk - see above
Noted that NEODyS has removed 2008 EO7 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 ER7 risk assessment - see above
Noted that JPL Sentry has updated its 2008 EX5 risk assessment - see above
Noted that NEODyS has updated its 2008 EX5 risk assessment - see above
Grabbed MPEC 2008-E78 - Daily Orbit Update - see above
1556Grabbed MPEC 2008-E79 - 2008 EA9 - see above
0501Grabbed MPEC 2008-E77 - Observations of Comets - see above
0330Grabbed MPEC 2008-E73 - Comet C/2008 A1 (McNaught) - see above
Grabbed MPEC 2008-E74 - Comet P/2008 A2 (LINEAR) - see above
Grabbed MPEC 2008-E75 - Comet C/2008 C1 (Chen-Gao) - see above
Grabbed MPEC 2008-E76 - Comet C/2008 E1 (Catalina) - see above