Visualization of manned asteroid mission. 
Credit: GWU/SPI-Ball Aero Target NEO flyer.

A/CC is now posting a list from Josh Hopkins at Lockheed Martin of Potentially Accessible Asteroids for robotic and human missions along with an ephemerides page to help observers take part in an observing campaign. Astrometry is needed for many objects and photometry is especially needed for most. We have been recognizing observations of these NEOs (such as in the campaigns section of today's DOU MPEC report below) since mid-October. This image, an artist's conception of an Orion spacecraft near an asteroid, is from a flyer for a conference on "Human Exploration Beyond LEO" reported earlier this year (see presentation PDF by Hopkins et al.).

Contents  on 5 November '11


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 5 November '11

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty. There were 16 listings noted earlier today.

New MPECs  on 5 November '11

Minor Planet Electronic Circulars

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

MPEC 2011-V28 - "17:45 UT" - 2011 VW5

MPEC 2011-V27 - "17:43 UT" - 2011 VV5

MPEC 2011-V26 - "17:41 UT" - 2011 VU5

MPEC 2011-V25 - "17:40 UT" - 2011 VT5

MPEC 2011-V24 - "17:38 UT" - 2011 VS5

MPEC 2011-V23 - "17:36 UT" - 2011 VR5

MPEC 2011-V22 - "17:34 UT" - 2011 VQ5

MPEC 2011-V21 - "17:33 UT" - 2011 VP5

MPEC 2011-V20 - "17:28 UT" - 2011 VO5

<< DOU on 5 Nov. '11 >>  MPEC 2011-V19 - "06:06 UT" - Daily Orbit Update

Observers  on 5 November '11

Sixteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 9 in MPECs 2011-V20, 2011-V21, 2011-V22, 2011-V23, 2011-V24, 2011-V25, 2011-V26, 2011-V27 & 2011-V28 -- 2011 VW5, 2011 VV5, 2011 VU5, 2011 VT5, 2011 VS5, 2011 VR5, 2011 VQ5, 2011 VP5, 2011 VO5
G51Byrne Obs. in southern California, 1 in MPEC 2011-V20 -- 2011 VO5
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2011-V27 & 2011-V28 -- 2011 VW5, 2011 VV5
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 8 in MPEC 2011-V19 -- 2011 UZ275, 2011 UZ255, 2011 UY255, 2011 UG256, 2011 UG21, 2011 UB276, 2011 UA193, 2011 PT
850Cordell-Lorenz Obs. in Tennessee, 3 in MPECs 2011-V24, 2011-V26 & 2011-V28 -- 2011 VW5, 2011 VU5, 2011 VS5
821Cordoba Obs. Bosque Alegre Station in Argentina, 1 in MPEC 2011-V19 -- 2008 GE1
379Hamamatsu-Yuto Obs. in Japan, 5 in MPEC 2011-V19 -- 2011 SR69, 2011 LC19, 96315, 136923, 2201
C32Ka-Dar Obs. TAU Station in Russia, 3 in MPECs 2011-V24, 2011-V27 & 2011-V28 -- 2011 VW5, 2011 VV5, 2011 VS5
704LINEAR in New Mexico, 6 in MPECs 2011-V19, 2011-V24 & 2011-V26 -- 2011 VU5, 2011 VS5, 2003 FH, 39572, 283460, 16834
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2011-V19, 2011-V20, 2011-V21, 2011-V22, 2011-V23 & 2011-V25 -- 2011 VT5, 2011 VR5, 2011 VQ5, 2011 VP5, 2011 VO5, 2007 CZ49
089Nikolaev Obs. in the Ukraine, 9 in MPEC 2011-V19 -- 2011 TN9, 2011 SL102, 2011 LC19, 2008 UX, 2004 JO2, 2003 FH, 32906, 24475, 16816
H36Sandlot Obs. in Kansas, 2 in MPECs 2011-V26 & 2011-V27 -- 2011 VV5, 2011 VU5
691Spacewatch 0.9m telescope in Arizona, 6 in MPEC 2011-V19 -- 2011 UU, 2011 SW71, 2011 QY11, 2010 JF, 2007 QX14, 67367
291Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2011-V19, 2011-V20, 2011-V21, 2011-V22, 2011-V23 & 2011-V25 -- 2011 VT5, 2011 VR5, 2011 VQ5, 2011 VP5, 2011 VO5, 2011 UZ255, 2011 UY192, 2011 UX114, 2011 UW158, 2011 UU
B18Terskol Obs. in Russia, 3 in MPECs 2011-V24, 2011-V26 & 2011-V27 -- 2011 VV5, 2011 VU5, 2011 VS5
I15Wishing Star Obs. in Rhode Island, 4 in MPEC 2011-V19 -- 2005 NX44, 2003 FH, 2002 QE7, 283460
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 November '11

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.





Notes for Today's Latest Risk Assessments
2011 UZ255JPL Sentry16402066-210531.4e-05-4.12-4.130JPL: "Analysis based on 57 observations spanning 5.0324 days (2011-Oct-30.44574 to 2011-Nov-04.47815)." Diameter approximately 0.072 km. from mean, weighted H=23.4.
NEODyS16402066-208941.53e-05-4.07-4.090NEODyS: "Based on 57 optical observations (of which 0 are rejected as outliers) from 2011-10-30.447 to 2011-11-04.479."
2011 UW158NEODyS16402046-208561.09e-05-2.56-2.60NEODyS: "Based on 60 optical observations (of which 2 are rejected as outliers) from 2011-10-25.419 to 2011-11-04.469."

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 5 November '11

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

1905Grabbed MPEC 2011-V20 - 2011 VO5 - see above
Grabbed MPEC 2011-V21 - 2011 VP5 - see above
Grabbed MPEC 2011-V22 - 2011 VQ5 - see above
Grabbed MPEC 2011-V23 - 2011 VR5 - see above
Grabbed MPEC 2011-V24 - 2011 VS5 - see above
Grabbed MPEC 2011-V25 - 2011 VT5 - see above
Grabbed MPEC 2011-V26 - 2011 VU5 - see above
Grabbed MPEC 2011-V27 - 2011 VV5 - see above
Grabbed MPEC 2011-V28 - 2011 VW5 - see above
Noted that the NEOCP has become empty
1640Noted that NEODyS has updated its 2011 UW158 risk assessment - see above
Noted that JPL Sentry has updated its 2011 UZ255 risk assessment - see above
Noted that NEODyS has updated its 2011 UZ255 risk assessment - see above
Grabbed MPEC 2011-V19 - Daily Orbit Update - see above