IPB

Welcome Guest ( Log In | Register )

6 Pages V  « < 4 5 6  
Reply to this topicStart new topic
Rev 149 - May 30-Jun 29, 2011 - Helene, Distant Iapetus, mutual events
Phil Stooke
post Jul 4 2011, 10:56 AM
Post #76


Solar System Cartographer
****

Group: Members
Posts: 8235
Joined: 5-April 05
From: Canada
Member No.: 227



Very nice. I think that other face is the leading side as you say.

Phil


--------------------
... because the Solar System ain't gonna map itself.
Go to the top of the page
 
+Quote Post
wildespace
post Feb 20 2017, 06:26 AM
Post #77


Member
***

Group: Members
Posts: 237
Joined: 15-January 13
Member No.: 6842



Just "discovered" Helene, what a peculiar-looking moon! Any idea what its surface gravity would be?

Here's my RGB composite from N00172891, N00172892, and N001728913

Attached Image



Enhanced saturation:
Attached Image


A lot of work went into "massaging" the individual images into alignment, but there's still some colour fringing.


--------------------
Go to the top of the page
 
+Quote Post
Explorer1
post Feb 21 2017, 04:19 AM
Post #78


Senior Member
****

Group: Members
Posts: 1725
Joined: 13-February 10
From: Ontario
Member No.: 5221



007 m/s2 from Wolfram Alpha: http://www.wolframalpha.com/input/?i=helene+surface+gravity
The equation is pretty simple to calculate oneself, though: g = G * M / r2.
Go to the top of the page
 
+Quote Post

6 Pages V  « < 4 5 6
Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 14th July 2020 - 02:27 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 a project of the Planetary Society and is funded by donations from visitors and members. Help keep this forum up and running by contributing here.