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PIONEER chronology
Guest_PhilCo126_*
post Jan 4 2008, 05:35 PM
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Just thought I would start a similar topic as the 'VOYAGER chronology' ... of course with nice diagrams wink.gif
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dmuller
post Apr 30 2009, 04:35 PM
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I worked the Horizons system a bit more and get the following c/a times and distances. Most are pretty close to the timeline Liss provided, with the exception of Phoebe (arguably not a close approach in either scenario!). According to these numbers, the undiscovered near-miss moon would have been Epimetheus at a distance of 6676km ... or about 6 minutes 45 seconds, given their relative speed of 59,271km/h!
Disclaimer: Horizon states that the trajectory data are reconstructed to fit the observations and is thus probably not as accurate as trajectory data available for current missions. Nevertheless:

CODE
1979-08-29  06:06:10        Iapetus closest approach (1,032,535km)
1979-08-29  11:53:33        Phoebe closest approach (13,713,574km)
1979-08-31  12:32:33        Hyperion closest approach (666,153km)
1979-09-01  14:50:55        Epimetheus closest approach (6,676km)
1979-09-01  15:59:30        Dione closest approach (291,556km)
1979-09-01  16:26:28        Mimas closest approach (104,263km)
1979-09-01  16:29:34        Saturn Flyby (altitude: 20,591km)
1979-09-01  16:51:11        Janus closest approach (228,988km)
1979-09-01  18:25:34        Tethys closest approach (329,197km)
1979-09-01  18:30:14        Enceladus closest approach (222,027km)
1979-09-01  22:15:27        Rhea closest approach (345,303km)
1979-09-02  18:00:33        Titan closest approach (362,962km)


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- PhilCo126   PIONEER chronology   Jan 4 2008, 05:35 PM
- - PhilCo126   Hundred days without reply in this interesting top...   Apr 9 2008, 04:59 PM
- - dmuller   I can offer the following chronology ... not mind-...   Apr 18 2008, 05:05 AM
|- - Toma B   QUOTE (dmuller @ Apr 18 2008, 07:05 AM) i...   Apr 18 2008, 03:27 PM
|- - ElkGroveDan   Pioneer 10 does have a camera.   Apr 18 2008, 03:55 PM
- - PhilCo126   Indeed it was crucial to have a camera onboard, in...   Apr 18 2008, 05:03 PM
- - PhilCo126   The incredible Saturn flyby by Pioneer 11 in Septe...   Apr 18 2008, 05:44 PM
- - nprev   What a year 1979 was...V1 @ Jupiter in March, V2 t...   Apr 19 2008, 01:00 AM
|- - ElkGroveDan   I bought my first car in 1979.   Apr 19 2008, 01:26 AM
|- - djellison   QUOTE (nprev @ Apr 19 2008, 02:00 AM) Wha...   Apr 19 2008, 08:07 AM
|- - ustrax   QUOTE (nprev @ Apr 19 2008, 02:00 AM) Wha...   Apr 24 2008, 03:54 PM
|- - tedstryk   QUOTE (ustrax @ Apr 24 2008, 03:54 PM) At...   Apr 24 2008, 04:08 PM
|- - ustrax   That's my Ted "Smashing" Stryk! ...   Apr 24 2008, 04:25 PM
- - nprev   <grumble>...bloody young whippersnapper......   Apr 19 2008, 02:08 PM
|- - tedstryk   The most important day of that year was the 24th o...   Apr 19 2008, 02:19 PM
|- - SFJCody   I've just realized that New Horizons passing b...   Apr 19 2008, 03:13 PM
|- - tedstryk   One exciting thing to think about. Pioneer flew b...   Apr 19 2008, 03:28 PM
- - PhilCo126   That's an astronomer speaking ( Saturn's...   Apr 19 2008, 04:59 PM
|- - tedstryk   QUOTE (PhilCo126 @ Apr 19 2008, 04:59 PM)...   Apr 19 2008, 07:19 PM
- - belleraphon1   Interesting to note that CASSINI XXM end trajector...   Apr 21 2008, 10:56 PM
|- - dmuller   QUOTE (belleraphon1 @ Apr 22 2008, 08:56 ...   Apr 21 2008, 11:47 PM
|- - tedstryk   QUOTE (dmuller @ Apr 22 2008, 12:47 AM) O...   Apr 22 2008, 08:44 PM
|- - dmuller   QUOTE (tedstryk @ Apr 23 2008, 06:44 AM) ...   Apr 23 2008, 07:00 AM
- - nprev   <dancing in my seat>...yeah, I love that son...   Apr 24 2008, 11:57 PM
- - PhilCo126   With the passed 35th anniversary of Pioneer 10 Jup...   Dec 7 2008, 10:03 AM
|- - Enceladus75   If I remember from reading an article years ago th...   Dec 8 2008, 04:09 AM
|- - 4th rock from the sun   Here are two P10 images (A5 and A7) that I tried t...   Dec 8 2008, 06:30 PM
|- - Liss   Well, a side question to Pioneer chronology... In...   Mar 1 2009, 10:15 AM
- - PhilCo126   Check: http://en.wikipedia.org/wiki/Moons_of_Jupit...   Mar 1 2009, 06:34 PM
|- - Liss   QUOTE (PhilCo126 @ Mar 1 2009, 09:34 PM) ...   Mar 3 2009, 08:12 PM
- - sariondil   Have a look at http://en.wikipedia.org/wiki/Naming...   Mar 3 2009, 11:51 PM
|- - Liss   OK, speaking about chronology again. Here's th...   Mar 4 2009, 10:17 AM
|- - Liss   And here's the list of Pioneer 11 Jupiter flyb...   Mar 4 2009, 10:28 AM
- - Liss   Finally, the Pioneer 11 flyby of Saturn events (pl...   Mar 4 2009, 10:53 AM
- - PhilCo126   The decision to go for the "outside" opt...   Apr 23 2009, 10:05 AM
|- - gwiz   According to my notes, there was a correction on 1...   Apr 23 2009, 06:42 PM
- - Paolo   Robotic Exploration of the Solar System part 1 (pa...   Apr 23 2009, 07:43 PM
- - dmuller   Thanks Liss & all other for these beautiful ti...   Apr 24 2009, 12:21 AM
|- - Liss   QUOTE (dmuller @ Apr 24 2009, 03:21 AM) T...   May 4 2009, 06:56 PM
- - PhilCo126   That's a great website Daniel ... and "We...   Apr 24 2009, 06:40 AM
- - dmuller   QUOTE (PhilCo126 @ Apr 24 2009, 04:40 PM)...   Apr 25 2009, 01:52 AM
- - dmuller   Pioneer 11 30 years ago ... now showing on my webs...   Apr 29 2009, 08:59 AM
- - climber   I realy enjoy your website   Apr 29 2009, 10:35 AM
- - dmuller   After consulting JPL's NSSDC and Horizons webs...   Apr 30 2009, 03:21 AM
|- - Liss   QUOTE (dmuller @ Apr 30 2009, 06:21 AM) A...   May 4 2009, 07:58 PM
- - dmuller   I worked the Horizons system a bit more and get th...   Apr 30 2009, 04:35 PM
- - dmuller   Pioneer 11 had a fairly close flyby of Atlas at 45...   May 7 2009, 02:28 AM
|- - Liss   QUOTE (dmuller @ May 7 2009, 06:28 AM) QU...   Jul 22 2009, 01:39 PM
- - PhilCo126   We're ready for the upcoming 30th anniversary ...   Jun 17 2009, 03:38 PM
- - dmuller   Beautiful! And we're nearly there, 75 days...   Jun 17 2009, 11:18 PM


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