PIONEER chronology |
PIONEER chronology |
Guest_PhilCo126_* |
Jan 4 2008, 05:35 PM
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#1
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Guests |
Just thought I would start a similar topic as the 'VOYAGER chronology' ... of course with nice diagrams
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Guest_PhilCo126_* |
Apr 9 2008, 04:59 PM
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#2
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Guests |
Hundred days without reply in this interesting topic, so I'll post an add-on:
Pioneer 11 encounter with planet Saturn It was an important decision by NASA-Ames Research to perform a low-risk flyby of Saturn outside Saturn's rings the other Phil |
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Apr 18 2008, 05:05 AM
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#3
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Member Group: Members Posts: 340 Joined: 11-April 08 From: Sydney, Australia Member No.: 4093 |
I can offer the following chronology ... not mind-boggling, but at least something (apologies for the layout):
Pioneer 10 03 Mar 1972 (01:49) Launch 15 Jul 1972 Enters Asteroid Belt 03 Dec 1973 200,000 km Jupiter Fly-By 31 Mar 1997 End of science mission 27 Apr 2002 Last telemetry data received 23 Jan 2003 Last signal received 04 Mar 2006 Last attempt to acquire signal fails in 126,000 years No longer dominated by gravitational force of sun in 2 million years Aldebean Fly-By Pioneer 11 06 Apr 1973 (02:11) Launch 02 Dec 1974 34,000 km Jupiter Fly-By 01 Sep 1979 21,000 km Saturn Fly-By 30 Sep 1995 End of science mission 30 Nov 1995 Last signal received in 4 million years Lambda Aquilla Fly-By -------------------- |
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Apr 18 2008, 03:27 PM
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#4
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Member Group: Members Posts: 648 Joined: 9-May 05 From: Subotica Member No.: 384 |
in 2 million years Aldebean Fly-By I was just about to ask will it be a close flyby then I remembered that it does not carry a camera....so I guess no nice images.... -------------------- The scientist does not study nature because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful.
Jules H. Poincare My "Astrophotos" gallery on flickr... |
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Apr 18 2008, 03:55 PM
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#5
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Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
Pioneer 10 does have a camera.
-------------------- If Occam had heard my theory, things would be very different now.
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Guest_PhilCo126_* |
Apr 18 2008, 05:03 PM
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#6
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Guests |
Indeed it was crucial to have a camera onboard, in fact a special instrument better known as " Imaging Photo-polarimeter "
It measured the faint glows in interplanetary space of the zodiacal light, the Gegenschein and it scanned the planets and moons... |
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Guest_PhilCo126_* |
Apr 18 2008, 05:44 PM
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#7
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The incredible Saturn flyby by Pioneer 11 in September 1979, next year 30 years ago!
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Apr 19 2008, 01:00 AM
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#8
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Merciless Robot Group: Admin Posts: 8785 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
What a year 1979 was...V1 @ Jupiter in March, V2 there in July, and Pioneer @ Saturn in September. (On a personal note, I also got to see a total solar eclipse in February). I'll bet a lot of people got hooked on space that year.
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Apr 19 2008, 01:26 AM
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#9
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Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
I bought my first car in 1979.
-------------------- If Occam had heard my theory, things would be very different now.
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Apr 19 2008, 08:07 AM
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#10
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Founder Group: Chairman Posts: 14434 Joined: 8-February 04 Member No.: 1 |
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Apr 19 2008, 02:08 PM
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#11
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Merciless Robot Group: Admin Posts: 8785 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
<grumble>...bloody young whippersnapper...</grumble>
<gloat>...nyah, nyah, Doug, me & EGD got to watch VL1, VL2, V1, V2, & P11 "live"!!! </gloat>... -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Apr 19 2008, 02:19 PM
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#12
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
The most important day of that year was the 24th of January. Far eclipsed the Voyager and Pioneer missions.
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Apr 19 2008, 03:13 PM
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#13
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Member Group: Members Posts: 813 Joined: 8-February 04 From: Arabia Terra Member No.: 12 |
I've just realized that New Horizons passing beyond the orbit of Saturn will be the first time in my life that a spacecraft has traversed this distance. In 1982 the Voyager encounters with Saturn were long past.
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Apr 19 2008, 03:28 PM
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#14
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
One exciting thing to think about. Pioneer flew by Saturn just before the 1979-1980 ring plane crossing. 28 years later, the 2009 ring plane crossing is identical. Voyager 1 flew by soon after in 1980, and Voyager 2 flew by in 1981, with the rings appearing much brighter because of the wider illumination angle. In a sense, that period was almost like having an orbiter make three gigantic orbits. The fact that Cassini will follow the exact same seasonal sequence over the next three or four years should make for some very interesting comparisons.
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Guest_PhilCo126_* |
Apr 19 2008, 04:59 PM
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#15
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That's an astronomer speaking ( Saturn's rings appear much narrower in 2008 & 2009 )
However for Pioneer 11's passage of Saturn, NASA had 2 options. They've chosen the safer trajectory. Those interested in the complete background story of selecting Pioneer 11's flyby option of Saturn, can turn to: Quest - The History of Spaceflight Quarterly ( Volume 7 number 4 - Spring 2000 ) Pathfinding the Rings: The Pioneer Saturn Trajectory Decision ( By Mark Wolverton ) |
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