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The quest for the REAL NINTH PLANET, Something for number-crunchers |
 Aug 31 2006, 01:17 PM
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Member  Group: Members Posts: 147 Joined: 14-April 06 From: Berlin Member No.: 744  |
I was wondering: if there really was a "jupiter" or an "earth" lurking in the far reaches beyond Neptune, would we be able to detect it with present technology? The current limiting magnitude record is magnitude 28.2 (that of Comet Halley in 2003 seen by the VLT telescope).
So here it goes: what magnitude would be a) Earth b) Jupiter at: 100 AU, 200 AU and 1000 AU respectively? I am looking forward to the results of your calculations. -------------------- |
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karolp The quest for the REAL NINTH PLANET Aug 31 2006, 01:17 PM
Greg Hullender I think you'll find most of what you want in h... Aug 31 2006, 01:48 PM Jyril The prototype telescope (PS-1, first of the four t... Aug 31 2006, 02:52 PM Greg Hullender Should we be concerned that the project is 1/4 com... Sep 1 2006, 03:25 AM djellison Given the 'neigbourhood' clause of the IAU... Sep 1 2006, 06:55 AM AndyG QUOTE (karolp @ Aug 31 2006, 02:17 PM) ... Sep 1 2006, 09:42 AM Myran Neat tool AnyG.
I see you used the albedo for Ear... Sep 3 2006, 12:02 PM
AndyG QUOTE (Myran @ Sep 3 2006, 01:02 PM) Neat... Sep 4 2006, 11:33 AM ugordan QUOTE (AndyG @ Sep 4 2006, 12:33 PM) Inci... Sep 4 2006, 11:52 AM AndyG QUOTE (ugordan @ Sep 4 2006, 12:52 PM) In... Sep 4 2006, 01:58 PM edstrick We should note that it's now pretty clear the ... Sep 4 2006, 10:59 AM David QUOTE (edstrick @ Sep 4 2006, 10:59 AM) T... Sep 4 2006, 12:44 PM alan QUOTE (AndyG @ Sep 1 2006, 04:42 AM) My c... Sep 4 2006, 03:39 PM AndyG QUOTE (alan @ Sep 4 2006, 04:39 PM) I bel... Sep 5 2006, 08:28 AM Myran QUOTE alan wrote: believe the absolute magnitude ... Sep 4 2006, 03:59 PM hermes Hi. I'm new here. I'm working on a school ... Sep 5 2006, 02:37 AM AndyG QUOTE (hermes @ Sep 5 2006, 03:37 AM) Hi.... Sep 6 2006, 01:10 PM hermes Is it possible to use pluto's gravity to make ... Sep 6 2006, 09:59 AM djellison Unfortunately not - Pluto is a tiny tiny tiny tiny... Sep 6 2006, 10:08 AM Greg Hullender If it's just designing a trajectory, I'd g... Sep 6 2006, 01:59 PM ugordan QUOTE (Greg Hullender @ Sep 6 2006, 02:59... Sep 6 2006, 02:09 PM jsheff QUOTE (ugordan @ Sep 6 2006, 10:09 AM) Th... Sep 6 2006, 10:48 PM djellison If one was feeling brave.... you could seperate an... Sep 6 2006, 02:02 PM hermes We can do a Hohmann's Transfer over orbital pl... Sep 7 2006, 02:17 AM hermes And how did NASA solve the problems of astedroids?... Sep 7 2006, 02:28 AM hermes "asteroids". Sep 7 2006, 02:30 AM Greg Hullender For a school paper, though (depending on what leve... Sep 7 2006, 04:16 AM hermes Thanks for the answer. I guess I can use those ass... Sep 7 2006, 02:23 PM hermes Uhm, djellison, can you explain more about your id... Sep 8 2006, 06:56 AM djellison Hi Hermes,
Do you know about the Deep Impact mis... Sep 8 2006, 07:08 AM ugordan QUOTE (djellison @ Sep 8 2006, 08:08 AM) ... Sep 8 2006, 08:24 AM remcook I think solar arrays are a bit optimistic. Look at... Sep 8 2006, 08:32 AM djellison QUOTE (remcook @ Sep 8 2006, 09:32 AM) I ... Sep 8 2006, 08:58 AM ugordan QUOTE (djellison @ Sep 8 2006, 09:58 AM) ... Sep 8 2006, 09:03 AM hermes Dear djellison,
I'm just curious about how all... Sep 8 2006, 08:34 AM ugordan "Near by" is a misleading term. New Hori... Sep 8 2006, 08:40 AM paxdan QUOTE (hermes @ Sep 8 2006, 09:34 AM) I... Sep 8 2006, 08:53 AM hermes Oh, I didn't know that. I thought space is fil... Sep 8 2006, 08:53 AM AndyG QUOTE (hermes @ Sep 8 2006, 09:53 AM) And... Sep 8 2006, 10:17 AM JRehling QUOTE (hermes @ Sep 8 2006, 01:53 AM) Oh,... Sep 8 2006, 04:35 PM hermes Dear ugordan,
Can you tell me more about the deep ... Sep 8 2006, 09:22 AM ugordan Nope. If you took that Hohmann transfer trajectory... Sep 8 2006, 09:36 AM hermes Dear ugordan,
You mean the ion thruster? Are they ... Sep 8 2006, 09:52 AM paxdan QUOTE (hermes @ Sep 8 2006, 10:52 AM) Dea... Sep 8 2006, 10:08 AM mchan The Dawn mission launching in less than a year wil... Sep 8 2006, 10:09 AM hermes Thanks a lot everybody.
Still, is there anyway t... Sep 8 2006, 10:28 AM ugordan Gravity assists in principle can work both ways. J... Sep 8 2006, 10:41 AM hermes Dear Ugordan, can you explain to me again? I'm... Sep 8 2006, 11:55 AM ugordan To put it short, yes, by your own propulsion. Whet... Sep 8 2006, 12:09 PM hermes Thanks Ugordan. Sep 8 2006, 12:24 PM  |
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