IPB

Welcome Guest ( Log In | Register )

2 Pallas
Paolo
post Oct 11 2009, 08:49 AM
Post #1


Senior Member
****

Group: Members
Posts: 1729
Joined: 3-August 06
From: 43° 35' 53" N 1° 26' 35" E
Member No.: 1004



no one seems to have noticed this
http://www.sciencemag.org/cgi/content/abstract/326/5950/275
Go to the top of the page
 
+Quote Post
 
Start new topic
Replies
TheAnt
post Apr 24 2016, 11:41 PM
Post #2


Member
***

Group: Members
Posts: 495
Joined: 12-February 12
Member No.: 6336



QUOTE (Steve5304 @ Apr 23 2016, 06:08 PM) *
Why cant we just go an even lower descent on Ceres. Or are we not calibrated for that?

A new target does not make a lot of sense imo, it wont be anything bigger than a few football fields unless there is something i am missing


It's not calibration of instruments, we would get even higher resolution for the neutron measurements from GRaND for example. But that bad flywheel which have to be compensated by Dawn using fuel to aim at the surface then to realign itself to send data back to Earth.
The craft would use up the remaining fuel in such an orbit. And as already pointed out, that's now something that can be allowed to happen.

Dawn have to be put in a safe orbit that will not pose any risk of collision in the foreseeable future at least.
Pallas would be the grand price on one already excellent mission, since that small world appear to be an eroded proto planet.
And we know that they did at least look into the possibility of such a flyby earlier. Pallas will pass trough the plane of the ecliptic in just a few years, it might be the reason for the wish to approve a mission extension soon.

Though I agree with Nprev, this appear to be a means to get a little more of the spacecraft that by necessity will have to do a final flight anyway.
Regardless of object it won't be anything but a flyby, but it's good enough in my book, even though it might not be Pallas.
So if not, lets hope they have identified something with odd properties, carbonates or minerals or something else that deserves a closer look where even just images might give us an insight.
Go to the top of the page
 
+Quote Post
HSchirmer
post Apr 25 2016, 12:00 AM
Post #3


Member
***

Group: Members
Posts: 684
Joined: 24-July 15
Member No.: 7619



QUOTE (TheAnt @ Apr 24 2016, 11:41 PM) *
Regardless of object it won't be anything but a flyby,


Well, it could be a fly into, like LCROSS or the end of GRAIL.

Edit, quick check shows that Pallas crosses Cere's orbital plane in late Feb '19, nice timing as Earth's closes approach occurs in April '19.
Go to the top of the page
 
+Quote Post

Posts in this topic
- Paolo   2 Pallas   Oct 11 2009, 08:49 AM
- - nprev   Well, well, well! Guess it's extremely pre...   Oct 11 2009, 08:57 AM
|- - Paolo   I discussed about this with Mark Rayman a few week...   Oct 11 2009, 10:55 AM
|- - vjkane   QUOTE (nprev @ Oct 11 2009, 09:57 AM) Wel...   Oct 12 2009, 05:03 AM
- - nprev   I was thinking that it was maybe a few degrees off...   Oct 12 2009, 05:11 AM
- - Paolo   From Wikipedia QUOTE Pallas has not been visited ...   Oct 12 2009, 05:38 AM
|- - tedstryk   There was a blurb about a Pallas encounter that br...   Oct 12 2009, 02:54 PM
||- - vjkane   QUOTE (tedstryk @ Oct 12 2009, 03:54 PM) ...   Oct 12 2009, 04:19 PM
|- - PaulM   I wonder if the Indians or Chinese have considered...   Oct 12 2009, 07:34 PM
|- - HSchirmer   Since there is already a 2 Pallas thread, so I...   Apr 24 2016, 12:06 AM
- - Paolo   Note also this LPSC paper http://www.lpi.usra.edu/...   Oct 14 2009, 06:17 PM
- - djellison   A series of barely funny but fairly inappropriate ...   Oct 15 2009, 07:01 AM
- - Paolo   On ArXiv today: Physical Properties of (2) Pallas   Dec 21 2009, 06:43 AM
- - nprev   Huh. Almost the same average density as Mars. Ha...   Dec 21 2009, 06:55 AM
- - elakdawalla   Thanks very much for the pointer to that article, ...   Dec 22 2009, 06:05 PM
- - Explorer1   It would be amazing to get Dawn to a 3rd object, I...   Apr 24 2016, 01:26 AM
- - Paolo   and don't forget that changing the inclination...   Apr 24 2016, 07:02 AM
- - nprev   Pallas is not nearly massive enough to effect a si...   Apr 24 2016, 09:29 AM
|- - HSchirmer   QUOTE (nprev @ Apr 24 2016, 10:29 AM) Pal...   Apr 24 2016, 12:45 PM
- - jasedm   It would be fantastic to think it would be on the ...   Apr 24 2016, 07:01 PM
- - TheAnt   QUOTE (Steve5304 @ Apr 23 2016, 06:08 PM)...   Apr 24 2016, 11:41 PM
|- - HSchirmer   QUOTE (TheAnt @ Apr 24 2016, 11:41 PM) Re...   Apr 25 2016, 12:00 AM
- - nprev   Landing or crashing is not considered an option si...   Apr 25 2016, 01:58 AM
|- - HSchirmer   QUOTE (nprev @ Apr 25 2016, 01:58 AM) Lan...   Apr 25 2016, 02:30 AM
- - nprev   I think that's about ten deep in "ifs...   Apr 25 2016, 03:33 AM


Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 28th March 2024 - 11:40 PM
RULES AND GUIDELINES
Please read the Forum Rules and Guidelines before posting.

IMAGE COPYRIGHT
Images posted on UnmannedSpaceflight.com may be copyrighted. Do not reproduce without permission. Read here for further information on space images and copyright.

OPINIONS AND MODERATION
Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators.
SUPPORT THE FORUM
Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member.