IPB

Welcome Guest ( Log In | Register )

 
Reply to this topicStart new topic
Pioneer 10 at 100AU, 200AU from Voyager 1, For the statisticians ...
dmuller
post Oct 31 2009, 11:32 PM
Post #1


Member
***

Group: Members
Posts: 332
Joined: 11-April 08
From: Sydney, Australia
Member No.: 4093



On glancing on my own website, I found that two statistical milestones are coming up soon:
100AU - distance of Pioneer 10 from the Sun
200AU - distance between Pioneer 10 and Voyager 1

Naturally, the Pioneer 10 mission is over and no contact exists with the spacecraft anymore, but still impressive!


--------------------
Go to the top of the page
 
+Quote Post
Decepticon
post Nov 1 2009, 03:58 PM
Post #2


Senior Member
****

Group: Members
Posts: 1158
Joined: 25-November 04
Member No.: 114



Wow!
Go to the top of the page
 
+Quote Post
ups
post Nov 1 2009, 06:18 PM
Post #3


Member
***

Group: Members
Posts: 115
Joined: 8-January 05
From: Austin | Texas
Member No.: 138



QUOTE (dmuller @ Nov 1 2009, 12:32 AM) *
Naturally, the Pioneer 10 mission is over and no contact exists with the spacecraft anymore, but still impressive!


Is Pioneer completely dead at this point or do some of the instruments still have a bit of power remaining?
Go to the top of the page
 
+Quote Post
JohnVV
post Nov 1 2009, 10:33 PM
Post #4


Member
***

Group: Members
Posts: 532
Joined: 18-November 08
Member No.: 4489



Is Pioneer completely dead at this point or do some of the instruments still have a bit of power remaining?

i thought that the nuke on it was still putting out about 0.001 watts

not much but just a radio blip every now and then ??
i don't know for sure .
Go to the top of the page
 
+Quote Post
Hungry4info
post Nov 1 2009, 10:44 PM
Post #5


Senior Member
****

Group: Members
Posts: 1019
Joined: 26-July 08
Member No.: 4270



Surely not. If either Pioneer gave out a little detected blip, I'm sure it would have been heard about here on UMSF (Remembering the ICE is alive! thread).


--------------------
-- Hungry4info (Sirius_Alpha)
Go to the top of the page
 
+Quote Post
djellison
post Nov 1 2009, 11:06 PM
Post #6


Administrator
****

Group: Chairman
Posts: 13803
Joined: 8-February 04
Member No.: 1



Pioneer 10
QUOTE
The last successful reception of telemetry was on April 27, 2002; subsequent signals were barely strong enough to detect. Loss of contact was probably due to a combination of increasing distance and the spacecraft's steadily weakening power source, rather than structural failure of the craft.
The last, very weak signal from Pioneer 10 was received on January 23, 2003, when it was 12 billion kilometers (7.5 billion miles) from Earth.[8]
A contact attempt on February 7, 2003 was not successful.
One final attempt was made on the evening of March 4, 2006, the last time the antenna would be correctly aligned with Earth. No response was received from Pioneer 10.[9]


Pioneer 11
QUOTE
The spacecraft has operated on a backup transmitter since launch. Instrument power sharing began in February 1985 due to declining generator power output. Science operations and daily telemetry ceased on September 30, 1995 when the RTG power level was insufficient to operate any experiments. As of the end of 1995, when its mission ended, the spacecraft was located at 44.7 AU from the Sun at a nearly asymptotic latitude of 17.4 degrees above the solar equatorial plane and was heading outward at ~2.4 AU/year (11.6 km/s); this is the lowest velocity of the five spacecraft now escaping the Solar System (Voyagers 1 and 2, Pioneers 10 and 11, and New Horizons). [1]
Earth's motion has carried it out of alignment with the spacecraft antenna. As the antenna cannot be maneuvered to point back at our planet, it is no longer possible with current technology to establish further communication from Earth with the probe.


Wiki.
Go to the top of the page
 
+Quote Post
New Ocean
post Nov 27 2009, 02:59 AM
Post #7


Newbie
*

Group: Members
Posts: 4
Joined: 25-January 09
From: New York
Member No.: 4583



QUOTE (JohnVV @ Nov 1 2009, 05:33 PM) *
i thought that the nuke on it was still putting out about 0.001 watts


How could it possibly have decayed so far? The half life for Pu238 is something like 85 years. It should be putting out more than that. I was under the impression that while science instruments could not operate anymore, the radio could. Tracking was stopped to save money.


--------------------
Go to the top of the page
 
+Quote Post
ugordan
post Nov 27 2009, 10:07 AM
Post #8


Senior Member
****

Group: Members
Posts: 3568
Joined: 1-October 05
From: Croatia
Member No.: 523



QUOTE (New Ocean @ Nov 27 2009, 03:59 AM) *
How could it possibly have decayed so far?

It's not so much Pu decay as it is thermocouple decay in the RTG due to radiation degrading.


--------------------
Go to the top of the page
 
+Quote Post
K-P
post Jan 21 2010, 12:46 PM
Post #9


Junior Member
**

Group: Members
Posts: 24
Joined: 27-September 07
From: Tampere, Finland
Member No.: 3919



And so today Pioneer 10 reached 100 AU from the Sun!
So, congratulations to the original team although the probe is already silent...
Would have been interesting to receive some data still from Pioneer 10 since it is the
only interstellar probe heading towards the tail of Sun's heliosphere.

http://www.heavens-above.com/solar-escape.asp



--------------------
Spamming the Solar System with greetings since 1997!
(New Horizons, Huygens, Opportunity/Spirit, Deep Impact, Dawn, Phoenix, Selene... to name a few) :)
Go to the top of the page
 
+Quote Post
climber
post Jan 21 2010, 03:41 PM
Post #10


Senior Member
****

Group: Members
Posts: 2625
Joined: 14-February 06
From: Very close to the Pyrénées Mountains (France)
Member No.: 682



QUOTE (K-P @ Jan 21 2010, 01:46 PM) *
And so today Pioneer 10 reached 100 AU from the Sun!
So, congratulations to the original team although the probe is already silent...
Would have been interesting to receive some data still from Pioneer 10 since it is the
only interstellar probe heading towards the tail of Sun's heliosphere.

As I already told here, Pioneer 10 has been launched the very same day I had my first driving lesson.
I'm very far from having driven 15.000.000.000 kms... but I'm still talking.


--------------------
Go to the top of the page
 
+Quote Post
K-P
post Jan 21 2010, 04:39 PM
Post #11


Junior Member
**

Group: Members
Posts: 24
Joined: 27-September 07
From: Tampere, Finland
Member No.: 3919



QUOTE (climber @ Jan 21 2010, 05:41 PM) *
I'm very far from having driven 15.000.000.000 kms... but I'm still talking.


...and RTG of your Ford Pinto...?
wheel.gif wheel.gif wheel.gif

laugh.gif



--------------------
Spamming the Solar System with greetings since 1997!
(New Horizons, Huygens, Opportunity/Spirit, Deep Impact, Dawn, Phoenix, Selene... to name a few) :)
Go to the top of the page
 
+Quote Post
climber
post Jan 21 2010, 08:00 PM
Post #12


Senior Member
****

Group: Members
Posts: 2625
Joined: 14-February 06
From: Very close to the Pyrénées Mountains (France)
Member No.: 682



QUOTE (K-P @ Jan 21 2010, 05:39 PM) *
...and RTG of your Ford Pinto...?
wheel.gif wheel.gif wheel.gif

laugh.gif

Ford C-Max actually!


--------------------
Go to the top of the page
 
+Quote Post

Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 23rd October 2014 - 09:22 AM
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.