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Dawn leaves Vesta behind for Ceres



 
 
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  #1  
Old September 1st 12, 07:38 AM posted to sci.space.station
snidely
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Default Dawn leaves Vesta behind for Ceres

After about a year, Dawn is on the move again.

Fly-around of Vesta included (also on YouTube):
http://dvice.com/archives/2012/08/dawn-bids-farew.php

/dps

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  #2  
Old September 1st 12, 08:39 AM posted to sci.space.station
Brian Gaff
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Default Dawn leaves Vesta behind for Ceres

Have they not been having gyro issues recently? I just wondered how this
might impact the next couple of years.

Brian

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"Snidely" wrote in message
news:mn.fd8a7dc8135b0ee8.127094@snitoo...
After about a year, Dawn is on the move again.

Fly-around of Vesta included (also on YouTube):
http://dvice.com/archives/2012/08/dawn-bids-farew.php

/dps

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Who, me? And what lacuna?




  #3  
Old September 1st 12, 08:44 PM posted to sci.space.station
snidely
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Posts: 1,303
Default Dawn leaves Vesta behind for Ceres

Brian Gaff explained :
Have they not been having gyro issues recently? I just wondered how this
might impact the next couple of years.


"Snidely" wrote in message
news:mn.fd8a7dc8135b0ee8.127094@snitoo...
After about a year, Dawn is on the move again.

Fly-around of Vesta included (also on YouTube):
http://dvice.com/archives/2012/08/dawn-bids-farew.php



Dunno. Back in January, Marc Rayman posted in the online journal:

"To summarize so far, once Dawn has any variance at all between the
predicted orbital motion that mission controllers have radioed to it
and its actual path, its long wings will be tipped a little while it
observes Vesta. In opposing the resultant gravity gradient effect, the
reaction wheels will accelerate. When the reaction control system
thrusters fire to decelerate the wheels, they will nudge Dawn still
more off course, and the cycle will continue."

http://dawn.jpl.nasa.gov/mission/journal_01_27_12.asp

Skimming the July 25th entry
http://dawn.jpl.nasa.gov/mission/journal_07_25_12.asp,
I didn't see anything about gyro problems.
The June 30th entry is very satisfied with the Low Altitude Mapping
Orbit operations, and the move to HAMO2 was going smoothly.

/dps

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