Talk:STEREO

message: Can anyone say how much more fuel would have been needed to stop the craft in L4 and L5 ? Rod57 (talk) 01:36, 29 May 2009 (UTC)
replies: text: A&B orbital velocities relative to earths are 1.8 km/s; mass 620kg. Rod57 (talk) 23:17, 7 February 2011 (UTC)
thread_title:  Fuel to stop 

message: Is anything likely to end the mission before the attitude control propellant runs out ?
When is that likely ? Rod57 (talk) 01:53, 29 May 2009 (UTC)
replies: text: STEREO interview, Feb 2011  says "The STEREO mission is currently funded until 2013. “The probes have enough fuel to last 100 years,” ... “The lifetime limiting factor is the spacecraft electronics and funding. The solar arrays will only gradually degrade over decades.”" Rod57 (talk) 20:53, 7 February 2011 (UTC)
replies: text:  Then why go around the backside of the sun? Do they have enough fuel to maintain a constant position at 120 degrees from the Earth? Something like Rod57 had mentioned immediately above. DAVilla (talk) 10:01, 9 February 2011 (UTC)
replies: text:  Presumably they don't have anywhere near enough fuel to change velocity by 1.8 km/s get back to a 365 day orbit. - Rod57 (talk) 13:19, 1 December 2019 (UTC)
thread_title:  Life of mission 

message: Many the STEREO images come from the 4 narrow band filters of the Extreme UV Imager (EUVI) which surely needs much more content in this or even its own article ? Rod57 (talk) 23:02, 7 February 2011 (UTC)
thread_title: Need more on EUVI

message: The article states that spacecraft B ejected itself from earth orbit in the opposite direction from spacecraft A.  I thought that both spacecraft are orbiting the sun in the same direction as the earth, and that they are both "receding" or changing position relative to the earth because one has an orbital radius slightly more than 1 AU and one has an orbital radius slightly less.192.249.47.195 (talk) 15:56, 8 February 2011 (UTC)
replies: text: That's a good clarification. DAVilla (talk) 10:00, 9 February 2011 (UTC)
thread_title: Orbital Direction

message: I'm still a bit perplexed as to the orientation of the two satellites' orbits, and how they could achieve a simultaneous view of the sun.  An animation, or even just a diagram, would help this article a lot.
I understand that these satellites are orbiting the EARTH.  But I don't see how two satellites orbiting the earth could obtain simultaneous views of BOTH sides of the sun.  Wouldn't they have to be situated at opposite sides of the sun, in order to achieve that?  What am I getting wrong?
Thanks, 75.4.194.121 (talk) 02:21, 11 February 2011 (UTC)
replies: text: Check out the video at this website:  --Xession (talk) 02:23, 11 February 2011 (UTC)

text: The only thing you're not getting is that they ARE on opposite sides of the sun.  — Preceding unsigned comment added by FoxBee (talk • contribs) 18:47, 1 November 2011 (UTC)
thread_title:  I'm confused about the orbits 

message: The article says sun rotates every 25 days, while the video says its around 27 days. Both seem to be correct, but the article could be clarified, e.g. link to Solar_rotation#Sidereal_rotation or another way. Do you think the following is a good clarification?
Since the sun rotates every 25 or 27 days (depending on how you define solar rotation), ...
Could a more experienced editor please update the article?
Thanks, Ms937 (talk) 21:55, 29 December 2011 (UTC)
thread_title:  Sun rotation 

message: The article is confusing regarding the expected lifetime of the project. the infobox say "5 years" but these are over, and the mission seem to be still ongoing? thanks 79.177.231.197 (talk) 06:44, 29 May 2012 (UTC)
thread_title:  Lifetime 

message: Could add:
* Is the communications dish (high gain antenna) steerable ?
* Is there an omni-directional antenna (as backup) ?
* What propellant and thrusters are on board ?
* What type and number of reaction wheels ?
* Does it have to interrupt sun observations to observe another star for 20 days ?
* - Rod57 (talk) 13:53, 1 December 2019 (UTC)
thread_title:  Subsystems - detail 

message: Article says STEREO-B started to spin. Did NASA say why they thought it started spinning, and why it wasn't able to stop by itself ? - Rod57 (talk) 19:23, 13 November 2020 (UTC)
thread_title:  Why was STEREO-B lost