Andromeda Galaxy

M31 - The Andromeda Galaxy

 

I finally found a light source that I can use to take a type of image called a 'flat field' to use for calibration of astronomy photographs.    It's called a 'Flip-Flat' available from Alnitakastro -- it provides an even light source that allows software to characterize your optical system.

 

I found a new web site to show off my astronomy images called Astrobin

You can see my photo gallery here

Jupiter, up close and personal

 

I finally got the chance to try out an astrophotography technique called 'Eyepiece Projection' -- provides a much higher magnification than prime focus.   

Chasing a cometary visitor

On October 24th, Comet 17P/Holmes brightened suddenly from magnitude 17 to magnitude 2.5. Saturday night was clear in north Texas so I decided to try getting a picture of the comet. I set up my Televue NP 101 with my ST-237 camera using a flip mirror arrangement to center the image on the sensor. You can see the nucleus of the comet and the dusty halo surrounding it.

I am going to have to experiment some with the Meade Flip Mirror to get the camera and eyepiece at focus at the same time. I'll probably need to get a small extender to move the camera back about 1/4 of an inch to get both the eyepiece and camera into focus at the same time. The helical focuser on the flip mirror does not have enough inward travel to accommodate the eyepiece when the camera is in focus.

Visual Observing and a BBQ

We had a few friends over for dinner tonight. We barbqued steaks and set the Televue NP101 refractor up to cool down while we ate dinner.

Since we planned on visual observation of planets and the moon tonight I didn't go through the usual stringent polar alignment routines I normally use so setup was pretty quick.

Dinner was the steaks, mixed vegatables, ice tea, and a visit to Marble Slab for ice cream! We all were bad and ordered big bowls of ice cream.

After dinner we looked at the Moon and Saturn then went inside and watch several SLOOH missons.

It was a pretty good time...

Big Mount and Small Scope

Here is a picture of my HD200C mount and Celestron C8 SCT. The mount barely notices that it has a scope attached! I have a JMI NGF-S focuser as well as a small motorized control for the main mirror focus. This makes it easy to image from the kitchen table in comfort.

The HD200C is really the mount for my big scope the "Behemoth" as my family has named it. It is a 17.5" newtonian that I built from the optical parts of a Celestron Dobsonian and new high quality Mirror Cell, Focuser, Aluminium Tube, and Spider. I learned a lot about my scope by rebuilding it. you can see a picture of it on my web site (Big Telescope)

It looks like the clouds are clearing off tonight so off to take more pictures!

Polar Alignment

Tonight I set up my 8" Celestron SCT on my Parallax Instruments HD200C so that I could try using PemPro to drift align the mount.

It was an interesting adventure -- the graphs from PemPro are very sensitive. I was able to align the mount to the pole and take a few pictures, but it took most of the night. That was expected since this is the first time I have tried aligning using a CCD camera and software with my HD200C mount.

I'm hoping for a clear saturday night so I can take advantage of the alignment to shoot some good pictures tomorrow night. I was able to get a short color shot of M13 before going to bed at 5:00am. I am slowly learning how to optimize my equipment and technique.

We'll see what the rest of the weekend brings.

Cleaning up Images and Subscribing to SLOOH

Tonight was a short evening. I took out the scope to check on an update to PemPro that fixed the trackbox problem some of us were having.

I didn't plan to do too much as it was pretty clear that clouds were going to invade my sky before too long. I set up the Teleue NP-101 with my ST-27 camera and used FocusMax to bring Pollux into focus. Then I started the test run with PemPro. It worked perfectly, tracking the star just as it should. Bug fixed!

After the successful test, I decided to try imaging M95 before the clouds got too bad. I took 60x30 second images with varying degrees of success at dodging the clouds that were moving in. I stacked the best of the images to produce the picture above. As you can tell I will have to learn how to take flats to clean up the circles caused by dust on the detector. Of course I'll also figure out how best to clean off the detector itself.

Toward the end of the photo run, the images starting getting dimmer so I knew the clouds had finally caught up with me. So tonights astrophotography session ended early.

My folks were up visiting so I decided to bring up the SLOOH telescope on the big screen TV so we could look at some of the objects being observed. I subscribed to their system for 100 missions so we could check out the telescopes and try out the service.

SLOOH calls their observing sessions missions. Since they are located in the Azores, they are in darkness in the early evening and clouds here don't mean clouds there!

We watched several missions, including some very nice nebula. I will start observing through SLOOH more often.

Well it's not too late, but we have to get up early tomorrow so goodnight all!