I’ve been working a bit on my March 19 wide-field image of Andromeda. There’s not a lot of signal in that two-minute exposure and I’ve had to stretch it quite a bit. I used bad pixel mapping this time instead of dark frame subtraction to remove the hot pixels from my Canon 40D and a […]Read More Updated Andromeda Photo
I almost got out tonight to observe the Orion Nebula, but the weather didn’t quite clear early enough, and it’s already only 36 Fahrenheit! I decided to add this blog post instead. My Celestron wedge developed an annoying little problem which I repaired a few nights ago. Here’s what I did…Read More Celestron Wedge – Rubs the Wrong Way!
Here’s the result of processing a wide-field view of Andromeda, taken on March 19: This was a 2-minute piggy-back camera exposure with a 50 mm lens. In other words, with the camera sitting atop the CPC-800 telescope and tracking the sky. An equatorial wedge was used to eliminate field rotation during the 2-minute exposure.Read More Andromeda in the Woods
Many telescope mounts have ST-4 auto-guider ports, including my Celestron CPC-800. My ASI120MC-S camera includes a “ST-4 compatible” auto-guider port and came with a cable for connection to the telescope mount. I wanted to know more about how the telescope responded to inputs on the ST-4 port.Read More The Ubiquitous ST-4 Port
I mentioned a couple of days ago that my GPS failed again for the third time! Well, it doesn’t really fail, but rather gets confused. It’s an annoyance. I reset the GPS module last night and its working again. Still, it’s a pain in the butt. I’ve written up the procedure in this .pdf file: […]Read More Resetting the GPS – Again!
‘Twas a cold night in April, yet I thought I’d finally give my new setup a try at the cemetery. I added a guide camera and Raspberry Pi micro-controller (iAstroHub) in the past couple of months, and made other incremental changes. And after spending a some time on my back deck trying to align through […]Read More A cold, frustrating night in April…
March madness is all the rage. To me, that means everyone’s following the follies of over-paid athletes running around like a bunch of neanderthals! Sorry and I know I’m the outlier. But I’d rather be playing with my telescope! Meanwhile, it’s been a long winter of cloudy nights and freezing temperatures. You may recall that […]Read More March, 2018