Friday, August 21, 2015

Looking for the X on the moon, a photo from last night

I realized that the moon was at a phase where an x appears as a lit up object near the terminator. It was fascinating to view this,

I didn't take my canon eps with me to the observatory, so I decided to try to get a photo of the moon through and eyepiece using my iPad mini 3. I had loaded a few different HDR photography programs which will use the burst mode in the more advanced iPads and iPhones. I decided to try to get a picture using Fusion which is a $2 app on the iPad. I was able to tweak the settings to get a decent image. This image is not as good as one could get with a better camera setup, like a canon EOS camera mounted directly in the telescope or using a astronomy, webcam like camera. Since I didn't have those cameras handy and was in a bit of a hurry I decided to go with the iPad.

Handholding an iPad near the eyepiece to get a good image is a bit of a challenge. There was quite a bit of movement in the image when viewing the moon with the naked eye through the eyepiece. One could see the results of hot air corrects in the atmosphere. Some may have been from the heat being released from the observatory walls, some heat may have been higher up in the atmosphere.

The image isn't as sharp as I'd like it to be near the top of the moon. This due to the blur effect of the optics near the edge of the field and an iPad camera and the eyepiece not being perfectly aligned for photography.

The image may look like it has a lot of detail, and it does, but the live detail in the telescope was much better. Without complex stacking programs and taking video and stacking many exposures, most cameras fail to show the details you can see live when looking through the telescope. This image is probably 4 to 8 times less detailed than what one could see at the eyepiece. The only positive thing is there is no waving atmospheric heat effects in this image of course and I'm able to exposure and tweak the brightness and contrast which may not be as easy for us to do without a dual polarizer filter in the eyepiece. The moon was actually quite bright in the c14. And we often use filters to darken the moon when viewing it though a large telescope.

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Location:Last night I decided to open up the observatory and look at the moon and Saturn

Wednesday, August 6, 2014

HJRO will open up around 9:30pm tonight

Skies are supposed to be clearing up tonight.

One of the Faac club members wanted to open up the observatory, so we are opening it up.


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Sunday, June 15, 2014

Happy Father's day. . . we may be open briefly when it gets dark out tonight

There's a slight chance I'll open up the observatory tonight.   It depends on the weather and how my day goes.  Today is Father's day.  We opened up the observatory and I didn't make an announcement because some members of the club seemed interested in observing and I thought we might have a fairly good turnout.  I also met a few people while out and about during the day Saturday and mentioned to them that the observatory would be open.  None of the public showed up.

Today the skies may be fairly clear.  Last night the skies were plagued with high altitude clouds after 11:20PM and maybe even a bit earlier.  We saw good detail in the surface of Mars and saw Saturn as well with fairly good detail.   We actually had three key keepers and two FAAC astronomers out last night.  We spent much of the time talking about astronomy and listened to several good stories from different members about different topics, like the Messier list and the history of it.  We also looked at Tim Campbell's Flickr photograph page and he showed us some photos and discussed some photography techniques he used.  It was a pretty nice and easy going time at the observatory.

Tim Dey, Tim Campbell, Dan Barriball, Greg Knekleian (me) and Joe Bostic was out at the observatory.  I arrived a bit late at 10PM, but Tim Campbell had the observatory already open as he is one of the key keepers, and also our Ford Amateur Astronomy Club president.   We had a pretty good time and the mosquitoes didn't bother us to much.   Temperatures were a bit on the chilly side and there were a lot of fireworks being set off by locals and at least a half dozen Chinese lanterns being launched locally, while we had the observatory open.

I left at 11:45PM and ran some errands.  I think the observatory closed around midnight.  I took a picture of the moon as it was rising, one day after being a full moon.   The moon lit up the sky quite a bit once it was rising and the clouds started to cover and move in from the north.  We also saw the International Space Station fly overhead.  It actually flew well north below Polaris and toward Detroit's eastern shoreline.  It disappeared in the trees as it grew a bit dimmer.   We saw the ISS with a couple of pairs of binoculars.  We only noticed it during part of it's flight over the horizon and it was out for a couple of minutes while we looked at it with binoculars.


Friday, May 2, 2014

I've been experimenting with 3d imaging techniques while waiting for better weather.

I've been experimenting with ways that I might be able to add filters and masks to some of the telescopes inside the observatory and create a virtual binocular telescope.  This would in theory have a true stereo view and be useful for observing the moon.  It would work a bit differently than my binocular telescope, but might allow some interesting features which we have not seen at HJRO for public viewing options.

More on this when I find out more and complete more experiments.

Most of these experiments involve my telescopes at home at this time and when I get some of the techniques perfected (if I get them perfected) I'm hoping to apply them to the telescopes inside the observatory for some observing sessions which others can enjoy.

Monday, April 21, 2014

Received a comment from Tim Campbell about the Saturn images, chromatic color bleeding

Tim mentioned that the red and blue channels were out of alignment and there is a color alignment tool inside Registax that can be used to correct the offset colors.

I did that and reprocessed the Saturn photos.

Here is Saturn again, but with the colors aligned. This brings out more detail. I used virtually the same settings to process this, but changed my neat image approach a little bit. I'll update the other images in the previous post later on my laptop.

More detail :
The color channels can also be changed using advanced imaging programs like photoshop. One would have to split out the channels into layers from a one shot color tiff. Then align them as separate color channels. Registax did a pretty good job aligning the channels and it did this automatically. All I had to do was draw a box around the object from an rgb align dialog and Registax did all the work doing the alignment.

Not bad for free software off the net (Registax).

Neat image is not free however and can be bought as a stand alone piece of software or as a photoshop plug in.

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Saturn captured early this morning at 625x and 1251x

Captured some AVI movie files using backyard EOS and the Canon t1i on the back of the c14.

The planet looked really nice in the eyepiece, but probably would have looked even better the night before as seeing conditions were about 3 times worse this morning.

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Sunday, April 20, 2014

Capture and process of Mars at 1251x, 1:08am 4-20-2014

Update I just realized I calculated the powers wrong in the original listing and graphic.   This was calculated without the barlow lens, so my powers are stated at 625x but should be 1251x.  I'm going to change this listing and the graphical photo soon.

I opened up at the last minute without knowing how long I'd be out at about 10pm last night. I emailed a few Faac members or texted them. I thought I'd be out for one or two hours. Nobody showed up as a visitor. I had a lot of fun looking at Jupiter and Mars and tried to capture both of these planets with my canon EOS to get a good photo.

The results of the last capture and some afternoon processing are shown below.

- Mars at 1251x.
Some details

- Should calculate power for Canon EOS t-mounted on C14 as follows 3911mm focal length times 2 divided by 50, times 1.6 for 3/4 frame sensor giving 1251x.

- Used Backyard EOS on a laptop with the Canon EOS t1i.

- Captured a 400 frame AVI movie.

- Processed it a bit on a Asus laptop using Registax 6 (this software is free off the internet.)

- Exported the image as a tiff file, imported it and processed further using Neat Image noise reduction on a Macintosh computer

- Created the chart on the iPad with a Mars Atlas Map screen shot from the same time frame.

As you can see my image is a little dark compared to the chart.

Click on the photo below to see a bigger image.

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