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EPOXI Mission News
Paolo
post Sep 8 2010, 05:37 PM
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first Hartley 2 pictures from Deep Impact
http://epoxi.umd.edu/3gallery/Hartley2_first_light.shtml
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dmuller
post Sep 14 2010, 06:33 AM
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Any Epoxians here? Would love to know which current SPICE kernel to use in my realtime simulation (www.dmuller.net/epoxi ... version 3 rolling out in due course):

spk_drm230_WithBurn-full.bsp
or
spk_od230_NoBurn-full.bsp

Thanks in advance!


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stevesliva
post Oct 5 2010, 09:39 PM
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I've attempted to create an RSS feed for the "Daily Comet" at http://epoxi.umd.edu/6outreach/daily.shtml here:
http://feedity.com/rss.aspx/umd-edu/UVdbWlZV

(I'm sure someone is about to post an official one, but I couldn't find it, so I got to try out feedity.com's advanced features.)

Also, I'd suggest the moderators split this thread into a Comet Hartley Encounter thread beginning with the Sept. 3rd post.
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Paolo
post Oct 11 2010, 05:27 PM
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after Deep Impact, after EPOXI, an encore...

QUOTE
[NASA] REQUEST FOR INFORMATION (RFI)

In February 2011, the Deep Impact spacecraft will complete its mission
(renamed EPOXI) for a study of extrasolar planets during its cruise to
encounter Comet Hartley 2.

This Request for Information (RFI) solicits input from the broad space
science community that would contribute to NASA's study of possible
new uses for the NASA Deep Impact/EPOXI spacecraft beyond its current
mission and would support NASA's science objectives in any of SMD's
research disciplines (Astrophysics, Earth Science, Heliophysics, and
Planetary Science). Responses to this RFI will be used to inform
NASA's program planning.

The RFI is posted on the NASA research opportunity homepage at:

http://nspires.nasaprs.com/

(select "Solicitations" then "Open
Solicitations" then "NNH11ZDA003L").

The response date is November 5, 2010. For further information on
this RFI, please contact:

Mr. William Knopf
Science Mission Directorate
NASA Headquarters
wknopf@hq.nasa.gov



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djellison
post Oct 11 2010, 06:14 PM
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I'd been wondering if they would try an XXM with it smile.gif
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Paolo
post Oct 11 2010, 06:55 PM
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Of course with the 4.15 kg of fuel remaining I doubt that they will manage to do anything more significant than EPOCh-like observations.
I tried to play a little bit with the orbital elements given in the RFI document, but it seems like the probe will not come back to the vicinity of Earth before 2018, so no gravity assist possible
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jmknapp
post Oct 12 2010, 07:39 PM
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QUOTE (dmuller @ Sep 14 2010, 01:33 AM) *
Any Epoxians here? Would love to know which current SPICE kernel to use in my realtime simulation (www.dmuller.net/epoxi ... version 3 rolling out in due course):

spk_drm230_WithBurn-full.bsp
or
spk_od230_NoBurn-full.bsp

Thanks in advance!


I'd be curious to know too. I just published a Hartley 2 app that runs on Android devices & used the spk_od230_NoBurn-full.bsp file. It seems that that's still the file with the most recent datestamp on the NAIF website.

Searching on "hartley" in the Android market will bring up the app.

Joe


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djellison
post Oct 12 2010, 08:07 PM
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I get the loading screen, then it crashes out

CODE
The application Hartley2 (process com.naif.spicedemo3) has stopped unexpectedly


DroidX on 2.2

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jmknapp
post Oct 12 2010, 10:29 PM
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QUOTE (djellison @ Oct 12 2010, 03:07 PM) *
I get the loading screen, then it crashes out

CODE
The application Hartley2 (process com.naif.spicedemo3) has stopped unexpectedly


DroidX on 2.2


Thanks for checking it out--I just tried it on the 2.2 emulator & indeed it crashed. I just uploaded a new version to the market & would appreciate it if you give it another try.


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djellison
post Oct 12 2010, 10:44 PM
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Yup - it works now
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jmknapp
post Oct 12 2010, 11:58 PM
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QUOTE (djellison @ Oct 12 2010, 05:44 PM) *
Yup - it works now


Thanks for helping me test this--I only have a version 1.6 device (G1) & for later versions the emulator can only go so far, like it doesn't test the GPS features. I trust that your latitude and longitude were displayed correctly? If it can't read the geolocation, it defaults to Greenwich (0W, 51.67N).


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jmknapp
post Oct 21 2010, 11:23 AM
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Managed to get a shot of Hartley 2 the other night:
http://i187.photobucket.com/albums/x269/jm..._garden_det.jpg

Here's a little wider context:

http://i187.photobucket.com/albums/x269/jm...103p_garden.jpg

That's a 60-second exposure with an Olympus E-510 DSLR, 1000mm refracting telescope as a telephoto lens.

Stellarium had this configuration:

http://i187.photobucket.com/albums/x269/jm...tellarium-1.png

By the time of the Deep Impact flyby on Nov. 4th around 10:02 a.m. ET, Hartley 2 will be a little further away (0.156 AU vs. 0.122 AU). It should be possible to photograph the comet that morning. From my location in Ohio Hartley 2 will rise around midnight on Nov. 4 and will be at about 60 degree elevation in the south around daybreak, and it will be a new moon. Ah, to be in Hawaii to photograph it at the actual time of the flyby--among other advantages.

ADMIN : Embedded images changed to links. Don't put huge images in-line in posts.


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Vultur
post Oct 21 2010, 02:08 PM
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At what point will Deep Impact's pictures be higher resolution than Earthbound observatories'? I thought I'd seen that information on Emily's blog, but I can't find it now...
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ugordan
post Oct 21 2010, 02:28 PM
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Well, neither can really resolve the nucleus. DI will likely be able to do so just several hours before C/A. Calculating when the pixel scale on the coma will exceed earthbound observations is probably not a very useful number.


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charborob
post Oct 21 2010, 02:48 PM
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About the flyby, here is an excerpt from the official encounter schedule (http://epoxi.umd.edu/7press/schedule.shtml):
"The cometary nucleus will be resolved ~1 hour out with the spacecraft 45,000 km away from its target. **Closest approach of comet Hartley 2 is expected to occur at ~6:50 am PDT at a distance of 700 km.** [...] The MRI pixel scale at closest approach will be 7 m/pixel, giving a nuclear diameter of ~170 pixels in the highest resolution images."
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