Flintstone Stargazing

November 20, 2007

Comet 17P/Holmes on 11/20/07

Filed under: astronomy, Astrophotography, comet, Observation Journal — Tags: — Ed @ 11:50 pm


Comet 17P/Holmes on 11/20/07

Comet 17P/Holmes has moved off of Alpha Persei and continues to expand. It’s getting very hard to pick up visually because it is so diffuse and  the moon is so bright. It’s still possible to see it with averted vision, but only barely. I’m not sure whether or not it will be naked eye visible for much longer, particularly since the moon will be very bright for the next week or so.

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2 Comments »

  1. So Ed you mentioned you use a Meade DSI imager but had previously used a Nikon SLR. Can you tell me what advantages the Meade DSI imager has? Because all I’m using right now is a Nikon D50 and I’m not all that clear about the advantages of moving up to a dedicated imager. Both are single shot systems, right?

    Comment by Pierre — November 21, 2007 @ 7:48 pm

  2. I started using my Nikon D50 because that’s what I had – it’s a great camera with lots of detail. My problem with it was that my telescope was too cheap to be able to really take advantage of it – the camera was too heavy to stay still enough for long term photos (the shutter movement really messed stuff up) and my mount’s tracking isn’t presice enough to really work with the Nikon. I got the Meade DSI Color because it was on sale for $100. I couldn’t pass it up. I knew that with it, I could take long, long exposures because of the ability to stack images and figured it would help me get images of (particularly) the Messier Objects, which I was very interested in. It has really not disappointed. I’ve been extremely happy with it. I’m probably eventually going to upgrade my scope (and mount) and when I do I’ll be able to probably start using the Nikon again since I’ll be able to use the DSI for autoguiding and the DSLR will be on a steader and smoother mount. Eventually, I’d like to get an image with more resolution – I really think that the DSI (or an upgraded CCD) is the way to go – it’s much more sensitive and the software for stacking is built in. Plus, you can see your results as you go easier.

    The only downsides to the Meade DSI color are that it’s low resolution (648 x 488 pixels) which is less than a megapixel and it doesn’t have thermoelectric cooling (though I may add that). Other than those things, I’m very happy.

    Comment by Ed — November 21, 2007 @ 11:13 pm


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