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Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !

 
F-BVFA

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05/28/2015 02:32 PM

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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
Today, perhaps the most anticipated set of NAVCAM images of Comet 67P/Churyumov-Gerasimenko have been released by the Rosetta Mission...

NAVCAM image bonanza: close orbits and comet landing

Today perhaps the most anticipated set of NAVCAM images of Comet 67P/Churyumov-Gerasimenko have been released by the Rosetta Downlink & Archive Team via the Archive Image Browser and ESA’s Planetary Sciences Archive.

The 1776 images cover the period between 23 September and 21 November 2014, corresponding to Rosetta’s close study of the comet down to distances of just 10 km from the comet centre – 8 km from the surface – and the images taken during and immediately following the landing of Philae on the comet.

-50%
read more here + pics

[link to blogs.esa.int]

hf
I came. I saw. I Concorde.

For once you have tasted Concorde you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.

"I would say today we can integrate all religions and races EXCEPT ISLAM."
Singapore's founding father Lee Kuan Y ew
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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
Just released: 1776 NavCam images from Rosetta's close 10 km orbit and comet landing phases – enjoy!

[link to blogs.esa.int]

[link to www.esa.int]

hf
I came. I saw. I Concorde.

For once you have tasted Concorde you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.

"I would say today we can integrate all religions and races EXCEPT ISLAM."
Singapore's founding father Lee Kuan Y ew
Anonymous Coward
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05/29/2015 08:33 AM
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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
Today, perhaps the most anticipated set of NAVCAM images of Comet 67P/Churyumov-Gerasimenko have been released by the Rosetta Mission...

NAVCAM image bonanza: close orbits and comet landing

Today perhaps the most anticipated set of NAVCAM images of Comet 67P/Churyumov-Gerasimenko have been released by the Rosetta Downlink & Archive Team via the Archive Image Browser and ESA’s Planetary Sciences Archive.

The 1776 images cover the period between 23 September and 21 November 2014, corresponding to Rosetta’s close study of the comet down to distances of just 10 km from the comet centre – 8 km from the surface – and the images taken during and immediately following the landing of Philae on the comet.

-50%
read more here + pics

[link to blogs.esa.int]

hf
 Quoting: F-BVFA


Wow, thanks F-BVFA, that's the one we have been waiting for. Here is the direct link to the image browser directory.
[link to imagearchives.esac.esa.int]

MTP008 and MTP009 are the new ones with close up views of the comet. Now where has the "we will never see pictures" guy gone?

K
F-BVFA

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05/29/2015 11:36 AM

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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
The latest NAVCAM release contains images of Comet 67P/C-G from around the time of Philae's landing on 12 November 2014.
Credit: ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0.

More info:
[link to blogs.esa.int]

hf
I came. I saw. I Concorde.

For once you have tasted Concorde you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.

"I would say today we can integrate all religions and races EXCEPT ISLAM."
Singapore's founding father Lee Kuan Y ew
Anonymous Coward
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05/30/2015 07:26 AM
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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
Rosetta Now

Someone who will make great use of the new NAVCAM images is graphics artist and digital director, Mattias Malmer. One of his recent projects is to provide a view of comet 67P as it would be seen now by Rosetta. Here it is.

[link to mattias.malmer.nu]

Hold your cursor over the image to see 2 hours worth of views. The smooth sections of the comet model are those areas that have remained in shadow, but they are shrinking now. Soon the entire comet will be mapped.

K
F-BVFA

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05/30/2015 04:12 PM

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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
And now for a new view of Comet 67P/C-G! This image was taken with Rosetta's NAVCAM on 20 May, from a distance of about 164 km. It is lightly processed to bring out details of the comet's activity.
Credits: ESA/Rosetta/NavCam – CC BY-SA IGO 3.0

CometWatch 20 May
This image of Comet 67P/Churyumov-Gerasimenko was taken by Rosetta's NAVCAM on 20 May at a distance of 163.6 km from the comet centre. It is a single frame image with a resolution of 13.9 m/pixel, and measures 14.3 km across. The intensities and contrast have been adjusted to emphasise the activity of the comet.

-50%
read more here + pictures
[link to blogs.esa.int]

hf
I came. I saw. I Concorde.

For once you have tasted Concorde you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.

"I would say today we can integrate all religions and races EXCEPT ISLAM."
Singapore's founding father Lee Kuan Y ew
Anonymous Coward
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05/31/2015 06:19 AM
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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
Ceres chain craters

Here is a nice view of chain craters on the surface of Ceres.

[link to photojournal.jpl.nasa.gov]

Chain craters are believed to form when the impacting body has broken apart prior to impact. The effect of gravitational tidal forces on a low cohesion body, such as a rubble pile or comet, draws the body out into a "train" of small impactors. This process is believed to have been observed when Comet Shoemaker–Levy 9 broke apart

[link to www2.jpl.nasa.gov]

and impacted Jupiter leaving a chain of dark patches on the planet.

[link to upload.wikimedia.org]

There is at least one other intriguing possibility. Ceres is thought to contain a high proportion of ices in its mantle. We have already seem images which suggest cracking or faulting of the surface, like the lower right of this image.

[link to photojournal.jpl.nasa.gov]

Could these chain craters have a connection with gasses escaping through fissures? Well they are not too dissimilar to these impact chain craters on Mercury [link to blogs.discovermagazine.com] but it's fun to speculate, any thoughts?

All Ceres images here: [link to photojournal.jpl.nasa.gov]

K
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05/31/2015 12:52 PM
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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
And now for a new view of Comet 67P/C-G! This image was taken with Rosetta's NAVCAM on 20 May, from a distance of about 164 km. It is lightly processed to bring out details of the comet's activity.
Credits: ESA/Rosetta/NavCam – CC BY-SA IGO 3.0

CometWatch 20 May
This image of Comet 67P/Churyumov-Gerasimenko was taken by Rosetta's NAVCAM on 20 May at a distance of 163.6 km from the comet centre. It is a single frame image with a resolution of 13.9 m/pixel, and measures 14.3 km across. The intensities and contrast have been adjusted to emphasise the activity of the comet.

-50%
read more here + pictures
[link to blogs.esa.int]

hf
 Quoting: F-BVFA


Interesting, hmm

so now the engine [link to www.esa.int]

Has been powered up. [link to www.esa.int]

I hope Rosetta is able to keep up.

K
F-BVFA

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06/01/2015 06:05 AM

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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
This great pic of Comet 67P/Churyumov-Gerasimenko was taken by the Rosetta Mission navcam on 20 May

Details

Title Comet on 20 May 2015 – NavCam
Released 29/05/2015 3:00 pm
Copyright ESA/Rosetta/NavCam – CC BY-SA IGO 3.0

see here:
[link to www.esa.int]

hf
I came. I saw. I Concorde.

For once you have tasted Concorde you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.

"I would say today we can integrate all religions and races EXCEPT ISLAM."
Singapore's founding father Lee Kuan Y ew
F-BVFA

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06/01/2015 01:27 PM

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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
For those who can:

Watch ARTE documentary on Rosetta's adventure at Comet 67P/C-G (in French or German) until 7 June:

French: [link to future.arte.tv]

German: [link to future.arte.tv]

hf
I came. I saw. I Concorde.

For once you have tasted Concorde you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.

"I would say today we can integrate all religions and races EXCEPT ISLAM."
Singapore's founding father Lee Kuan Y ew
Anonymous Coward
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06/02/2015 09:52 AM
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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
Crack

digging into the amazing new archive of NAVCAM images, here is good close view of the end of the neck crack.

[link to imagearchives.esac.esa.int]

and its host page [link to imagearchives.esac.esa.int]

It's also a nice reminder that which way is up on the comet is not always obvious. The best answer I can give is that up is away from the local centre of mass for the region you are looking at. For boulders in the top left of the image, up is towards the top right. For boulders in the bottom right corner of the image, up is towards the top left. Did I just make that worse scratching

This region is officially called Anuket, if you like that sort of thing [link to www.esa.int] The crack itself is 500m long and stretches most of the way across the neck. As you would expect many of the scientists involved in the mission are keeping a close eye on the changes in the crack. Flight dynamics and spacecraft operations are keeping their thumbs pressed for no change.

K
F-BVFA

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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
Check in on Comet 67P/C-G's activity – this view was captured on 21 May from a distance of 157km.

CometWatch 21 May

This impressive view of Comet 67P/Churyumov-Gerasimenko was captured on 21 May from a distance of 156.8 km from the comet centre. It is a single frame image with a resolution of 13.4 m/pixel, and measures 13.7 km across. The intensities and contrast have been adjusted to emphasise the activity of the comet.

read more here + pictures:

[link to blogs.esa.int]


Credits: ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0

hf
I came. I saw. I Concorde.

For once you have tasted Concorde you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.

"I would say today we can integrate all religions and races EXCEPT ISLAM."
Singapore's founding father Lee Kuan Y ew
Anonymous Coward
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06/03/2015 12:23 PM
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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
New Coma Discovery

There is an interesting new paper here [link to www.aanda.org] hosted on this page [link to www.aanda.org] from Paul Felman et al. concerning a new discovery in coma chemistry.

It had been assumed that the daughter species products of the comet volatiles, gasses like H1,O1,OH and C1, were produced by the photodisociation of the parent molecules such as H2O and CO2. The paper "Measurements of the near-nucleus coma of comet 67P/Churyumov-Gerasimenko with the Alice far-ultraviolet spectrograph on Rosetta" outlines a different mechanism for producing the daughter species.

Once molecules of water or CO2 have been photoionised, by energetic UV photons from the Sun, the ejected electrons go one to collide with other gas molecules in the coma. The electrons have energies in the range 25 to 50 eV, that is sufficient to cause electron impact dissociation of water and CO2 into their daughter products. This discovery neatly explains a puzzle of comet 67P's coma. At this distance from the Sun, very few photodisociation events should occur and yet the ( apparent ) daughter products of photodisociation are abundant.

THe team made use of data from the VIRTIS-H spectrometer to confirm relative abundances, MIRO and ROSINA to correlate production rates and OSIRIS and NAVCAM to confirm where ALICE was pointed. One particularly useful sample was taken on the 29th November when NAVCAM confirmed that ALICE was pointing at the shadowed neck region. Measurements of Lyman alpha and beta emission lines could be gathered, free from the background Ly-alpha signal of interplanetary space. The ratio of Ly-alpha to Ly-beta intensities was consistent with an electron impact dissociation emissions.

blog post
[link to blogs.esa.int]
with helpful diagram
[link to www.esa.int]
P.D. Feldman et al. (2015) Measurements of the near-nucleus coma of comet 67P/Churyumov-Gerasimenko with the Alice far-ultraviolet spectrograph on Rosetta. Astronomy and Astrophysics [link to www.aanda.org]

The Rosetta program is expected to cost around 1.3bn euros. That's not the same as making a big bonfire of money or blasting a pile of cash into space. That money has gone into supporting Airbus Defense & Space ( Astrium ) and Arianespace as well as a host of small companies and universities and research institutes all across Europe ( and beyond ). Spin off technologies include a miniaturised gas chromatograph that Colin Pillinger and the team at the OU developed for Ptolemy, that has gone into environment monitoring equipment for Astute class submarines and will find many more applications. I am sure the LILT ( Low intensity, Low temperature ) solar cells developed for Rosetta will find a role in tele-monitoring / survival applications at high latitudes. Rosetta spacecraft thermal control system has already found its way into everyday satellite applications.

One important reason to do the Rosetta program is for the prestige and to lay down a marker. At the time Rosetta was first proposed, ESA had only been in existence for a few months. The agency was looking for possible future missions that would challenge European aerospace to develop new technologies and rival the missions that only NASA and the Soviet programme could accomplish. It would be many years and a number of false starts before ESA was in a position to launch the Rosetta mission.

If you asked any of the scientists why do the Rosetta mission I am sure they would say it was to make new discoveries, to resolve the mysteries of comets and contribute to sum of scientific knowledge. The mission is supposed to break new ground and discover new things. If it didn't we would all feel cheated. This brings me to one of GLPs favourite memes. Any time scientists have made a new breakthrough or discovery, remember that is what they are supposed to do, they are described as being shocked and baffled. So with that in mind here is a scientist checklist list for "H1 and O1 in comets comes from electron impact disociation and not photodisociation"

Scientists are:

Interested            | X
Intrigued              | X
Mildly Surprised     | X
Baffled                 |
Shocked              |
Moving Tomatoes   |
Watchin YouToobs |
Nibiru!!!                |
Zetas right again   |

K
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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
New Taylor lecture

Well I say it's new, it's new to me but was filmed back in March at the University of Surrey for the national student's space conference 2015.



[link to www.youtube.com (secure)]

I have only watched the first few minutes but I can say Dr. Taylor is still a nervous speaker. I also noticed Chris Lintott was slouched in the first row playing with his phone every time the camera was on him. I wonder if his students do that to him?

K
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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
Thread:

Thread: NASA Instrument on Rosetta Makes Comet Atmosphere Discovery
I came. I saw. I Concorde.

For once you have tasted Concorde you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.

"I would say today we can integrate all religions and races EXCEPT ISLAM."
Singapore's founding father Lee Kuan Y ew
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06/04/2015 02:07 PM
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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !


Somebody said electron and now it's party time for sparkologists.

lflash ana

K
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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
Out damned spot!

One of the interesting things about Ceres spot 5 is that it remains bright even when it appears on the limb of the dwarf planet.

Latest from Dawn [link to photojournal.jpl.nasa.gov]

Earlier images [link to photojournal.jpl.nasa.gov]

and top right [link to photojournal.jpl.nasa.gov]

Is it a feature that stands proud of the surface?

K
Hydra

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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !


Somebody said electron and now it's party time for sparkologists.

lflash ana

K
 Quoting: K Hall

Not really party time - the sparkologists should read (and try to understand) the original paper: [link to www.aanda.org]

The magic word the sparkologists don't understand is: photoionization.

.
:ase26122019:
Annular Solar Eclipse - December 26, 2019 - Kannur, Kerala, India
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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
A boulder in space


drama
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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
A boulder in space


drama
 Quoting: Anonymous Coward 69375396


I want to share an amazing time saving technique with you. When I look at GLP front page I usually see about 5% of threads that interest me. I work this out by reading the thread titles, they tell me what the thread is about ! When I see a thread that doesn't interest me I find I can save time by not reading it. I find I can save even more time by not commenting on threads that don't interest me, how about that!

K
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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !


Somebody said electron and now it's party time for sparkologists.

lflash ana

K
 Quoting: K Hall

Not really party time - the sparkologists should read (and try to understand) the original paper: [link to www.aanda.org]

The magic word the sparkologists don't understand is: photoionization.

.
 Quoting: Hydra


Yes that and the fact it's water and CO2 that's dissociating, and the lack of lightning, high temperatures, and rock and well... everything else they believe in.

K
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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
Image resources

I often give out the link for the collection of NAVCAM images of the comet [link to imagearchives.esac.esa.int]

and the the link for the latest images of Ceres from Dawn. [link to photojournal.jpl.nasa.gov]

Here is a new link, this is a collection of images from the LOng Range Reconnaissance Imager ( LORRI ) on the New Horizons spacecraft. Pluto and Charon are the brightest objects in the images. [link to pluto.jhuapl.edu] Don't worry, the view is going to get much better, with closest approach in just over a month !

K
F-BVFA

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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
Activity on Comet 67P/C-G continues to rise, with new images from OSIRIS showing that some regions remain active even after nightfall.

Sunset jets

Rosetta’s scientific camera OSIRIS captured the sunset jets in the Ma’at region of the comet’s small lobe in late April. Images were taken approximately half an hour after the Sun had set over the region and show clearly defined jets of dust escaping into space.

-50% read more here + pictures

[link to blogs.esa.int]

hf
I came. I saw. I Concorde.

For once you have tasted Concorde you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.

"I would say today we can integrate all religions and races EXCEPT ISLAM."
Singapore's founding father Lee Kuan Y ew
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06/09/2015 05:01 AM
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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
Activity on Comet 67P/C-G continues to rise, with new images from OSIRIS showing that some regions remain active even after nightfall.

Sunset jets

Rosetta’s scientific camera OSIRIS captured the sunset jets in the Ma’at region of the comet’s small lobe in late April. Images were taken approximately half an hour after the Sun had set over the region and show clearly defined jets of dust escaping into space.

-50% read more here + pictures

[link to blogs.esa.int]

hf
 Quoting: F-BVFA


Things are definitely warming up on the comet !

K
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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
Ceres fly over video

Here is an arresting fly over of Ceres as put together by JPL from recent imaging runs from Dawn.



[link to www.youtube.com (secure)]

Hosted on the Dawn JPL page here [link to www.jpl.nasa.gov]

It is now pretty obvious that lumpy Ceres is actually the planet of the Clangers, complete with bright spots in the craters [link to www.freewebs.com] The vertical relief has been exaggerated in the video by a factor of 2.

At the end of the video NASA point out "Star field added in background" which is good, because they have forgotten to do that before blink

Here is a nice close view of Ceres from OpNav 9 at 5,100km 480m / pixel: [link to photojournal.jpl.nasa.gov]
hosted: [link to dawn.jpl.nasa.gov]


K
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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
Rosetta Mission view of Comet 67P/Churyumov-Gerasimenko on 25 April from a distance of about 93 km, seen by the OSIRIS camera. "Jets" are seen emanating from the comet’s small lobe after nightfall in this pic, processed to show details of the jets, rather than the nucleus.

Link:
[link to www.esa.int]

hf
I came. I saw. I Concorde.

For once you have tasted Concorde you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.

"I would say today we can integrate all religions and races EXCEPT ISLAM."
Singapore's founding father Lee Kuan Y ew
Anonymous Coward
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06/09/2015 06:35 PM
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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
Ceres fly over video

Here is an arresting fly over of Ceres as put together by JPL from recent imaging runs from Dawn.



[link to www.youtube.com (secure)]

Hosted on the Dawn JPL page here [link to www.jpl.nasa.gov]

It is now pretty obvious that lumpy Ceres is actually the planet of the Clangers, complete with bright spots in the craters [link to www.freewebs.com] The vertical relief has been exaggerated in the video by a factor of 2.

At the end of the video NASA point out "Star field added in background" which is good, because they have forgotten to do that before blink

Here is a nice close view of Ceres from OpNav 9 at 5,100km 480m / pixel: [link to photojournal.jpl.nasa.gov]
hosted: [link to dawn.jpl.nasa.gov]


K
 Quoting: K Hall


bump
F-BVFA

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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
A nice look at the southern hemisphere of Comet 67P/C-G from a distance of 209 km.

CometWatch 1 June

Today’s CometWatch entry was taken on 1 June 2015, from a distance of 209 km from the centre of Comet 67P/Churyumov-Gerasimenko. The image scale is 17.8 m/pixel and the image measures 18.2 km across.

read more + pictures:
[link to blogs.esa.int]

hf
I came. I saw. I Concorde.

For once you have tasted Concorde you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.

"I would say today we can integrate all religions and races EXCEPT ISLAM."
Singapore's founding father Lee Kuan Y ew
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06/10/2015 09:25 AM
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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
Dawn's Schedule at Ceres

Dawn has a schedule of orbits stretching from now to December to achieve the science goals of its mission. As you probably know Dawn has an ion engine that only produces around 90mN of thrust. That is the same amount of force that a sheet of A4 paper exerts on your hand due to gravity. It can take Dawn weeks to lower its orbit to the next stage of the mission.

Currently Dawn is performing the Survey orbit at 4,430km altitude. This process began on the 6th of June and is scheduled to last until the end of the month. The framing cameras will have a resolution of 410m/pixel during the survey orbit so that is only around 17% better than OpNav 9 at 480m/pixel [link to photojournal.jpl.nasa.gov] [link to dawn.jpl.nasa.gov] Spot 5 will appear 62% bigger than it does in this OpNav 8 image [link to photojournal.jpl.nasa.gov] which is 670m/pixel.

During the survey orbit, maps of Ceres will be produced from the VIR spectrometer ( based on Rosetta's VIRTIS-M ) that may have the resolution to determine what spot 5 is made from.

After the Survey orbit is complete Dawn will continue on down to the High Altitude Mapping Orbit ( HAMO ) which it will reach by 4th August. This will give us three times better resolution at 140m/pixel. HAMO will continue until October 15th when Dawn again lowers its orbit to reach LAMO. At just 375km above the surface LAMO, which Dawn reaches in early December, will give us a visual resolution of 35m/pixel around 14x better than the OpNav9 image.

K
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Re: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
Currently Dawn is performing the Survey orbit at 4,430km altitude. This process began on the 6th of June and is scheduled to last until the end of the month. The framing cameras will have a resolution of 410m/pixel during the survey orbit so that is only around 17% better than OpNav 9 at 480m/pixel [link to photojournal.jpl.nasa.gov] [link to dawn.jpl.nasa.gov] Spot 5 will appear 62% bigger than it does in this OpNav 8 image [link to photojournal.jpl.nasa.gov] which is 670m/pixel.

 Quoting: K Hall


Well that didn't take long, here is Spot 5 at 410m/pixel resolution [link to photojournal.jpl.nasa.gov] hosted [link to dawn.jpl.nasa.gov] That is probably the best view we will get until August 4th when Dawn begins its HAMO orbit. We may be lucky and see Spot 5 during an OpNav imaging run between 30th June and 4th August but there is no guarantee of that.

Looking at the image in photoshop last night didn't reveal much detail in the spots, they are pretty much saturated. I will try and find out the resolution of VIR to see if we can expect an answer to the puzzle this month.

K





GLP