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Dawn's first orbit, including RC3, March 6, 2015- June 15, 2015
Malmer
post Mar 12 2015, 10:08 AM
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I like these perspective jolting moments. My absolute favorite is earth and the moon seen from mercury during the lunar eclipse.
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Habukaz
post Apr 15 2015, 11:12 AM
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Dawn is currently communicating with Earth. Here's hoping for some of spot(s) 5. smile.gif

http://eyes.nasa.gov/dsn/dsn.html


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JohnVV
post Apr 16 2015, 04:53 AM
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for those interested this is the orbit for the Dawn spacecraft as in spirals down to a lower orbit over the next few weeks



the red line is the spacecraft orbit
generated from the
dawn_ql_150219-150531_150415_v1.bsp
dawn_ref_150423-150704_150414_DA400_v1.bsp

naif kernels
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belleraphon1
post Apr 16 2015, 07:09 PM
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Dawn Glimpses Ceres' North Pole
http://dawn.jpl.nasa.gov/news/Dawn_glimpse..._north_pole.asp
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elakdawalla
post Apr 16 2015, 07:11 PM
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JPL has released an animation of the April 10 opnavs. Very cool smile.gif



On Twitter, Brian Wolven asked me if the prominent bright peaks seen at the right-hand limb at the beginning of the animation were the two bright spots. I tried to figure out the answer to that, but couldn't. I made the attached polar projection of the northern hemisphere of the DEM from JohnVV's map, but I couldn't match crater features.
Attached thumbnail(s)
Attached Image
 


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JohnVV
post Apr 16 2015, 07:31 PM
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it would NOT be visible YET in the April 10 images

it is at 20 deg North
what is visible in that gif is 50+ to 90 north
as you can see in these two screenshots ( if the naif kernels are accurate, i have been having MAJOR issues with some of them )
added extra light to the scene
-- FOR APRIL 10 like the gif--
near the center

- off to the right side of ceres
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Habukaz
post Apr 16 2015, 07:36 PM
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Pleasantly surprised to see that OpNav 6 was released today. Something odd happens when I try to extract the individual frames with IrfanView, though: the frames come out in all sorts of sizes. blink.gif (edit: never mind, Python to the rescue)

In the latest Dawn Journal, it was mentioned that spot(s) 5 would not be visible in OpNav 6:

QUOTE
As we describe below, Dawn’s extensive photographic coverage of the sunlit terrain in early May will include these bright spots. They will not be in view, however, when Dawn spies the thin crescent of Ceres in its next optical navigation session, scheduled for April 10


so I think it would be odd if they suddenly turned up anyway.


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elakdawalla
post Apr 16 2015, 07:37 PM
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QUOTE (JohnVV @ Apr 16 2015, 12:31 PM) *
it would NOT be visible YET

Thanks for those simulations, they are really helpful.


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JohnVV
post Apr 16 2015, 08:12 PM
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in the northpole image you posted the two side by side bright spots are the line here circled


and it will be visible TODAY but not much better than before. just from a different angle
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Gladstoner
post Apr 16 2015, 09:18 PM
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I think this mound (or mounds) in the large crater is a good candidate for the limb peaks:

Attached Image

Note the trio of craters circled in red:


Attached Image


They seem to correspond with the craters in red here:

Attached Image


Now extend a longitudinal line over the north pole here:

Attached Image


And here (north pole marked with 'N'):

Attached Image


The peaks are to the east of the line. The crater with the mound(s) is marked with a yellow box on the longitudinal map.
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Gerald
post Apr 17 2015, 04:14 AM
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With the following assumed globes for PIA19317.gif OpNav6

I've obtained these projections:

Addition of the projections to the DLR map from RC2:


The bright spot is probably just outside frame 20 of the sequence.
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JohnVV
post Apr 17 2015, 05:56 AM
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aligning the animated gif with the textured mesh and lat long marks

the other "bright spot" is at 42 N and 0 long.
it is barely visible in the gif
3 frames from the gif with and without a spherical grid
the 0/360 long is top right on the sphere and you can see the major bright spot

hidden under the horizon

almost visible on the top left
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Toma B
post Apr 17 2015, 08:20 AM
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Ceres rotating back and forth in latest images from Dawn spacecraft.
I find it much easier to spot different surface details this way.

Attached Image


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TheAnt
post Apr 17 2015, 10:44 AM
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QUOTE (Toma B @ Apr 17 2015, 10:20 AM) *
I find it much easier to spot different surface details this way.


Thank you for your effort Toma. Now this make me think the surface resemble a golf ball. =)
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mcgyver
post Apr 17 2015, 05:26 PM
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QUOTE (Toma B @ Apr 17 2015, 08:20 AM) *
Ceres rotating back and forth in latest images from Dawn spacecraft.
I find it much easier to spot different surface details this way.


I can't figure out if bright spot is visible in the animation.
I place here the other available images for more comfortable comparisons:
http://cdn.phys.org/newman/csz/news/800/20...warfplanetc.jpg
http://cdn.phys.org/newman/csz/news/800/20...hisimageist.jpg
https://lightsinthedark.files.wordpress.com...3/pia189231.jpg
http://www.jpl.nasa.gov/spaceimages/images...19056_hires.jpg


I don't understand if I must link them or upload them or insert them in tag so I just add the links.
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