Jun 03 - Asteroid 2004 DC Near-Earth Flyby (0.026 AU)

Do you remember back in February 2004?
- LRK -

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http://www.hohmanntransfer.com/mn/0402/19.htm
- NEODyS has posted 2004 DC & 2004 DD
http://www.hohmanntransfer.com/mn/0402/19.htm#risks
Risk monitoring 19 Feb.

NEODyS has joined JPL in posting 2004 DC and also today has posted 2004 DD.
The latter was announced yesterday in MPEC 2004-D07 as discovered Tuesday morning by Arianna Gleason with the Spacewatch 0.9m telescope in Arizona and confirmed over the next night by KLENOT in the Czech Republic, the Starkenburg Observatory team at Calar Alto in Spain, and Arianna Gleason with the Spacewatch 1.8m telescope. From its brightness (JPL H=17.89), this object is roughly estimated at 895 meters/yards wide.

None of the objects listed with impact solutions and currently in view were reported in the Thursday Daily Orbit Update MPEC.


http://www.hohmanntransfer.com/mn/0402/24.htm
Summary Risk Table - sources checked at 2359 UTC, 24 Feb [See bottom right side of page. - LRK -]
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Well its back.

What goes around, comes around, and around, and around, until maybe oops.
- LRK -

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http://www.morien-institute.org/skywatch2006.html

Skywatching Calendar 2006
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Thanks for looking up with me.

Larry Kellogg

Web Site: http://lkellogg.vttoth.com/LarryRussellKellogg/
BlogSpot: http://kelloggserialreports.blogspot.com/
RSS link: http://kelloggserialreports.blogspot.com/atom.xml
Newsltr.: https://news.altair.com/mailman/listinfo/lunar-update
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http://www2.jpl.nasa.gov/calendar/
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# Jun 03 - Asteroid 2004 DC Near-Earth Flyby (0.026 AU)
http://neo.jpl.nasa.gov/cgi-bin/db_shm?des=2004+DC
http://www.cfa.harvard.edu/iau/Ephemerides/Unusual/K04D00C.html
# Jun 03 - New[Jun 01] Asteroid 2006 KJ89 Near-Earth Flyby (0.098 AU)
# Jun 03 - Asteroid 232 Russia Closest Approach To Earth (1.226 AU)
# Jun 03 - 40th Anniversary (1966), Gemini 9 Launch (Thomas Stafford & Eugene Cernan)
# Jun 03-04 - 3rd CFD Drag Prediction Workshop, San Francisco, California


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Space Weather News for June 3, 2006
http://spaceweather.com

What's Up in Space -- 3 Jun 2006

STRANGE CLOUDS; Last night, sky watchers in Northern Ireland witnessed a vivid display of electric-blue noctilucent clouds. Also known as "NLCs," these clouds float through the outer reaches of Earth's atmosphere at the very edge of space. They are most often seen from far-northern places such as Scandinavia or Canada, but in recent years they have been spotted as far south as Colorado and Utah. Last night's display marks the beginning of the
2006 noctilucent cloud season. Visit http://spaceweather.com for observing tips and a gallery of recent sightings.

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BINARY ASTEROID: Asteroid 2004 DC is flying by Earth today about 2.5 million miles away. Yesterday, astronomers using the giant Arecibo radar in Puerto Rico pinged the asteroid and discovered that it is actually two asteroids--a 60m rock orbiting a 300m rock. Researchers estimate that one in six near-Earth asteroids are binaries.

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http://www.naic.edu/vscience/schedule/tpfiles/TaylortagR2208tp.pdf

Technical Page
Proposal Type: Regular
General Category: Planetary Radar
Observation Category: Solar System

Total Time Requested: 10 Hours

Proposal Title: Physical Characterization of Potentially Hazardous Asteroid
2004 DC

ABSTRACT:
We request 10 hours of Arecibo S-band planetary radar time to physically characterize potentially hazardous near-Earth asteroid 2004 DC. This is both the first opportunity to observe this 0.7 - 1.5 km diameter (H = 18.1) asteroid with radar and a rare opportunity to observe a large near-Earth asteroid at a signal-to-noise ratio of several thousand per run. Radar observations will refine the orbit of 2004 DC, describe its surface morphology and radar reflection properties, and constrain its size, shape, and spin state. High resolution radar imaging will resolve geologic features several meters in size and determine if 2004 DC has any satellites.

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http://www.cfa.harvard.edu/iau/lists/PHACloseApp.html
PHA Close Approaches To The Earth
The following table lists the predicted encounters by Potentially Hazardous Asteroids (PHAs) to within 0.05 AU of the earth from the start of this year through 2178. Objects with very uncertain orbits are excluded from this listing, as are recently discovered objects whose orbits have been computed without consideration of planetary perturbations. The distances quoted are from the nominal orbit solutions in the cited references and can be quite uncertain, particularly for one-opposition objects. Perturbed orbital solutions consider perturbations by eight major planets (Mercury to Neptune), three minor planets (Ceres, Pallas and Vesta) and treat the earth and the moon as separate perturbing bodies. For comparison, the mean distance of the moon is 0.0026 AU = 384400 km = 238900 miles. (1 AU is approximately the mean distance of the earth from the sun = 149597870 km = 92955810 miles.)

Object (and name) Date of encounter (TT) Distance Orbit arc
Reference Object (and name)

Snip JD Calendar AU
2004 DC 2453890.33 2006 June 3.83 0.02586 2 oppositions,
2004-2006 E2006-L08 2004 DC
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http://www.cfa.harvard.edu/iau/lists/Dangerous.html
List Of The Potentially Hazardous Asteroids (PHAs)

http://www.cfa.harvard.edu/iau/lists/InnerPlot2.html
Plot of the Innermost Solar System

http://www.cfa.harvard.edu/iau/Animations/Animations.html
The Animations Page
Here are links to a number of animations prepared at the Minor Planet Center. They are not intended as rigorous depictions of the past and future motions of the objects concerned (although at the scales of these diagrams, any difference would probably not be noticeable), rather they are intended to assist in understanding the state of knowledge about the contents of the solar system ("A picture is worth a thousand words").
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http://neo.jpl.nasa.gov/orbits/
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Potentially Hazardous Asteroids

Below is the list of the 793 known Potentially Hazardous Asteroids.
Click on any name to see the object's orbit.

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WHAT THE MIND CAN CONCEIVE, AND BELIEVE, IT WILL ACHIEVE - LRK

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