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FORUMS Photo Sharing & Visual Enjoyment Astronomy & Celestial 
Thread started 18 Oct 2009 (Sunday) 10:59
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Spot the planet

 
MintMark
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Oct 18, 2009 10:59 |  #1

Here is an excerpt from a picture I took last month. It contains two planets... Jupiter is obvious, but can you find the other one? The only clue is that the picture was taken in mid September...

It's a stack of 28x5s f2.8 ISO 1600 light frames, 23 dark frames, 50mm focal length.


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Catanonia
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Oct 18, 2009 13:04 |  #2

Uranus on the left..


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Celestron
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Oct 18, 2009 14:09 |  #3

Most stars on the left side are blue but Uranus looks like it's far left side about middle ways by itself .




  
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troypiggo
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Oct 18, 2009 14:54 |  #4

I was gonna go with Neptune. It's been close to Jupiter for a bit lately. Would be far left on the edge of screen, 1/4 way up?


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Adrena1in
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Oct 18, 2009 15:11 |  #5

I'm thinking Neptune or Uranus too, since I seem to recall seeing it was going to be in conjunction with Jupiter not long ago. And it's either just above and to the right, or about a cm from the left and 5/6ths up from the bottom, or that one about a cm down and two inches in from the left.

Or, looks like there might be something right slap-bang next to Jupiter...is that the other planet??

EDIT: Stellarium is a fantastic piece of software, isn't it?! Just checked it.


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SteveInNZ
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Oct 18, 2009 17:13 as a reply to  @ Adrena1in's post |  #6

And you took it on the 12th. :)
Cartes du Ciel is pretty good too.

Steve.


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VIGER
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Oct 18, 2009 17:54 |  #7

Hi

Neptune was the closest planet to Jupiter in that time frame. However from the exif of the picture get me the time and date and location you were observing ...

Voila : )


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SteveInNZ
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Oct 18, 2009 18:56 as a reply to  @ VIGER's post |  #8

If only there was EXIF data. :-)

Steve.


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MintMark
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Oct 19, 2009 14:12 as a reply to  @ SteveInNZ's post |  #9

OK, I think you got it. It's Neptune and the picture was taken on 12th September. Here it is highlighted. I took the picture because I wanted to see if it was possible to detect a more distant planet with just a camera and a lens. Yes it is, but only if you know where to look :)

The chart I used to find it exactly is at http://media.skyandtel​escope.com …ents/Uranus_Nep​tune09.pdf (external link) You can really zoom in to the pdf to match up the fainter stars. The other blob right next to Jupiter is one of the moons.


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Celestron
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Oct 19, 2009 17:03 |  #10

I looked it up on 09-16-09 at 11:56pm and this is what Cartes Du Ceil shows . Almost identical to your real image .




  
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SteveInNZ
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Oct 19, 2009 18:36 as a reply to  @ Celestron's post |  #11

But Jupiter will be in the wrong place. Neptune moves slowly compared to Jupiter.
I was going to try and determine the time from the positions of the Jovian moons but I don't think they are resolved well enough. It would also indicate that I really need to get out more often. :)

Steve


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Celestron
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Oct 19, 2009 20:38 |  #12

Right now and for awhile Neptue will be close to Jupiter this season . Neptue does not move like the other planets do mainly cause Uranus and Neptune is farther away .




  
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Spot the planet
FORUMS Photo Sharing & Visual Enjoyment Astronomy & Celestial 
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