Dawn beams back asteroid science data

August 12, 2011 By Priscilla Vega
This anaglyph image of Vesta's equator was put together from two clear filter images, taken on July 24, 2011 by the framing camera instrument aboard NASA's Dawn spacecraft. The anaglyph image shows hills, troughs, ridges and steep craters. Credit: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA

(PhysOrg.com) -- The Dawn spacecraft has completed a graceful spiral into the first of four planned science orbits during the spacecraft's yearlong visit to Vesta. The spacecraft started taking detailed observations on Aug. 11 at 9:13 a.m. PDT (12:13 a.m. EDT), which marks the official start of the first science-collecting orbit phase at Vesta, also known as the survey orbit.

Survey orbit is the initial and highest orbit, at roughly 1700 miles (2700 kilometers) above the surface, which will provide an overview or "big picture" perspective of the giant asteroid.

The primary objective of survey orbit is to image the surface with near-global coverage in visible and with the mapping spectrometer, also known as VIR. Dawn also will be using its framing camera to collect image mosaics that complement the VIR spectral data to produce geologic and compositional maps of Vesta's surface. Ultrasensitive measurements of the spacecraft's motion using will allow improved understanding of the giant asteroid's . Dawn's gamma ray and will continue to collect background data.

The survey phase is planned to last 20 days. Each orbit takes almost three days, which will provide the spacecraft seven trips around Vesta. After survey orbit, Dawn will resume thrusting, taking about a month to spiral down gently to its next science orbit for an even closer view. That orbit, known as Mapping Orbit, or HAMO, begins in late September. Dawn will spend about a month in HAMO, circling around Vesta in half a day, rather than three. Dawn will orbit more than 60 times during HAMO, allowing the camera to fully map the illuminated portion of Vesta at even higher resolution, and enable the science team to generate stereo images.

Dawn launched in September 2007 and arrived at Vesta in July 2011. Following a year at Vesta, the spacecraft will depart in July 2012 for Ceres, where it will arrive in 2015. Dawn's mission to Vesta and Ceres is managed by the Jet Propulsion Laboratory, Pasadena, Ca., for NASA's Science Mission Directorate in Washington.

Explore further: Dawn probe reaches milestone approaching asteroid Vesta

More information: For more information about Dawn, visit: www.nasa.gov/dawn

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1.6 / 5 (9) Aug 13, 2011

I look forward to observations that confirm or deny evidence from meteorites [1-3], the Sun [4] and planets [5] that the Solar System formed directly out of poorly mixed debris from the Sun's explosion 5 billion years (5 Gyr) ago - followed by reformation on the pulsar.

1. "Xenon in carbonaceous chondrites", Nature 240, 99-101 (1972):

Data: www.omatumr.com/D...Data.htm

2. "Elemental and isotopic inhomogeneities in noble gases: The case for local synthesis of the chemical elements", TMAS 9, 104-122 (1975):

Data: www.omatumr.com/D...Data.htm

3. "Strange xenon, extinct super-heavy elements, and the solar neutrino puzzle", Science 195, 208-209 (1977):


4. "Solar abundances of the elements", Meteoritics 18, 209-222 (1983)

Data: www.omatumr.com/D...Data.htm

5. "Jupiter data confirm intra-solar diffusion", Meteoritics 33, A97, 5011 (1998):


O. K. Manuel
5 / 5 (4) Aug 13, 2011
Look forward all you want Oliver. But there isn't evidence yet that supports OUR Sun being the source of the isotopes.

Answer please these questions three.

What evidence shows that OUR Sun and not another is the source of the isotopes. Reposting the same stuff that has never answered the question is just spamming the site.

What distinguishes neutron repulsion from the Pauli Exclusion Principle? There should be laboratory evidence please support your claim for the first ever.

What evidence is there for the Sun having an iron mantle? The image you are so found of has only trace iron and shows a dynamo process in action with the currents flowing in hydrogen and helium ions.

Again the usual crap is not an answer. Write something new as the old stuff is the stuff that needs evidence.

5 / 5 (1) Aug 14, 2011
I had to give oliver a 2 since he said confirm OR deny. Which is a step in the right direction as he's finally admitted that his stuff doesnt have any proof behind it.
I've noticed ethelred he always runs from those questions. I doubt we'll see him back in this thread. Maybe someday he'll muster up the courage to respond but right now he knows you got him pinned there.
5 / 5 (2) Aug 14, 2011
Oliver could, indeed should, make a prediction of what should be found if he was correct. Something that would distinguish his idea from the mainstream idea of a sun that was not ours went supernova and contributed new high atomic weight atoms.

Since Oliver also thinks the Universe is eternal that ALL suns started with a neutron star as its core he really should give a prediction that includes that idea. One thing I would expect would be accretions layers in smaller objects like comets or asteroids. An earlier, though rare, generation of asteroids should exist if Oliver was correct. Even metallic asteroids with an accretion of later condrite material. The metallic core would show it to be much older than the outer layers via uranium dating.

My NEW question is why has Oliver never made such a prediction since he has been thinking on this for decades. Of course that would make it harder for him to ignore the Black Sky problem for an eternal non expanding universes.

4 / 5 (1) Aug 15, 2011
We are still waiting oliver. dont try to pretend you didnt see that post of ethelreds like you always do. I've got a question of my own too. Which apollo mission were you principal investigator for? do you have any way of proving it? i looked at many websites and read about the apollo missions and ive not seen your name mentioned at all in relation to any apollo mission and being the principal investigator.(well, besides your repeated claims of it, but thats far from proof.)

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