Astronomy Log

After doing some deep sky imaging I turned the scope onto Jupiter again and did some quick imaging through the 120ED with the Televue 2x Powermate and DMK21 camera. Small image, but I like to see the detail.

It’s been a while since I imaged Jupiter, and I have never imaged it since I got my Skywatcher 120mm ED refractor.

This was taken with a mono DMK21 camera and stacked in Registax 6. It was taken using a Televue 2.5x Powermate. I did try a 5x Powermate but the image was too blurry even once stacked and sharpened using wavelets.

It’s a small Jupiter, but perfectly formed!

This has been the first time I have imaged Jupiter with my Meade LX200 telescope, as last year when Jupiter was visible I had my Meade Bressier telescope.

Jupiter is not at a great location at the moment, as it is situated quite low in the sky, so atmospheric turbulence is a problem.  Also at the moment I have to wait until 12.30am for the planet to be high enough and within view as I have a house next door which covers the planet before this.

I used my Philips Webcam and used two different programs to capture the video, I used QCFocus and Philips VLounge software. I like QCFocus as it saves the video as .AVI files, whereas my copy of VLounge saves in .MPG, so I need to convert the video into .AVI in order to load it into Registax, which is a hassle.

I began just connecting the webcam straight to the telescope for the first capture, but as you can see from the image below, that the size of the planet is quite small.

I did want to try and catch the shadows of one of Jupiter’s moons on the image, but the black circle you can see on these images is actually a mark or dust spot and not what I thought was one of the moon’s shadows.

The second image involved adding a Meade Telenegative 2x Barlow lens to the telescope in order to get a larger image on the chip of the webcam.

I did also tried adding the standard Meade diagonal after the 2x Barlow but this made the image nearly completely fill the chip on the webcam but the image was over magnified and out of focus, I have not included an image of it here.

Next time I will try different combinations of may be a f6.6 focal reducer with a barlow, I think I will also try and image using the Meade DSI II that I have.

I went out on the 26th February to try and get the best out of Saturn, when it was at it’s largest for the year. I began imaging with my Philips SPC900 web cam straight onto my LX200 10″ telescope.

I spent the most time trying to get the best possible focus I could on the planet, and below is the best image I could get after I ran it through Registax on fully automatic processing. I took the footage in VLounge and played heavily with the webcams settings in the program before capture.

Just so you can get an idea of the original webcam video I took, this image was created from the video below:

I also took some video using my webcam together with my Meade 2x Barlow the only problem was that the magnification was too much and getting a good focus was not possible, plus Saturn filled the whole webcam chip.

If I had the chance to do it all again, I think I would add on my f6 focal reducer and then use the Meade 2x Barlow which should have given me an intermediate sized planet to image and one which I hopefully could get focus on.

Since purchasing a Solar filter and mask, together with a lot of information about Mercury being recently published, I wanted to know when the next transits of the Sun occur, so I can view them. Well it turns out the first one is not until 2012.

As seen from Earth, only transits of the inner planets Mercury and Venus are possible. Planetary transits are far more rare than eclipses of the Sun by the Moon. On the average, there are 13 transits of Mercury each century.

So for reference here are the dates for the next transits of Mercury and Venus:

Transits of Mercury Dates

 * distance (arc-seconds) between the centers of the Sun and Mercury

Transits of Venus Dates

I was looking forward to this time of year and having Saturn back in view.  I started my astronomy hobby in May, and at that point I did get some views of Saturn through my Bresser 130N telescope, but was not really able to image it with a manual scope.

The evening was not great for seeing and I did image Saturn too early on in the evening, when it was low in the sky, which then gives you atmospheric turbulence.

The images were taken using the Philips SPC900 web cam, I can’t remember the exact webcam settings, but it worked out I took nearly 2,000 frames or more to put into Registax 4.

Although the images are not award winners, not too bad for my first real images of Saturn, hopefully these will get better throughout the year and even better when I get used to imaging with the Meade DSI.

I decided to brave the cold last night and go out at about 10.30pm. I did not find it that cold, although this time I did wear a ninja type balaclava. After setting up, I wondered why I had even bothered coming out as a kind of icy fog then appeared.

I recently purchased a 2″ ED Barlow and wanted to give that a go to try and capture a larger Mars. I did have problems though get Mars on the computer screen via the webcam when using the Barlow. I usually start by getting Mars in the centre of the eyepiece and then I sync the LX200. I then swap the eyepiece for the webcam. I then re-focus and play with the webcam settings and then record.

If I am using a Barlow on top I then add the Barlow, but last night everytime I added the Barlow I lost Mars on the computer screen – very frustrating!

I wonder if the webcam went to sleep or just gave up, so I tried unplugging the webcam and shutting down VLounge as well. I tried several times then got annoyed and just took some footage without the Barlow lens.

What are the best procedures to follow to get webcam footage when using Barlows? Do I need another piece of equipment to see what is going on at the telescope at the same time as what the webcam can see?

I think the other problem was that the Barlow is 2″ and my eyepieces are 1.25″ and so is the webcam so I kept taking the Barlow out and then I had to add the adaptor back into the telescope to just use a 1.25″ eyepiece.

The Barlow does have a 1.25″ adaptor, I did try to align Mars in the eyepiece when using the Barlow and then swapped the eyepiece for the Webcam, but there was no Mars on the computer screen.

Ho Hum – try again next time, probably when the outside temp is not -2.

This was my 2nd attempt at imaging Mars with my Philips SPC900 Webcam. This time I decided to go out a bit later, so headed out at around 10.30pm and started imaging at 11pm. Leaving it later in the evening meant that Mars was in Gemini and quite high in the sky, so hopefully the atmosphere would not affect my imaging so much.

This time I made sure that VLounge software was recording at 10fps, I also played around a lot more with the setttings.

Both images are the same, just at different resolutions and magnifications.

This image was stacked in Registax 4 and the clip length was around 2 minutes. I originally took the clip at 10fps, but now I have looked back at the .avi, it says the fps is 24, this may be because I had to convert the original .mpg clip into an .avi

I did not use a Barlow, so it was taken at f10, I did try to use a 4x ImageMate, but this was just too powerful, so I stuck to just using the webcam with the UV/IR filter.

I am a lot happier with these images, and I am learning a lot doing this. I think the next step is to try and fill more of the CCD chip with the red planet. This means getting hold of a good quality 2x Barlow lens.

As Mars is very prominent in the sky at the moment, I feel it is my mission to try and get the best possible image I can whilst I have the red planet in sight.

I purchased a new Baader UV/IR lens the other day so I was really itching to give it a go. I used my Philips SPC900 web-cam, and I took around 100 seconds of video each time at 10 frames per second and 15 frames per second, in order to get lots of frames to put into Registax.

I still do all my recording in the supplied Philips VLounge software, although I don’t think this is the best way to go about it, one reason is because the output format is .MPG and I have to then convert it to .AVI to get it into Registax, which is a real pain.

See my second attempt for better Mars images. I have learnt a lot since this post.

You can make out some terrain marks of Mars in the image, but I want more! I still think I can get a better image, as this footage is a bit fuzzy and kind of out of focus. The video was taken when Mars was quite low in the sky. As at the moment I just can’t stay out too late as it’s so cold outside by the time Mars is high in the sky, but hopefully during December and January I should be able to get some more imaging done. I am also reading The Lunar and Planetary Webcam User’s Guide book, so hopefully I should pick up some more tips from this book.

Due to the number of houses around my small garden it has been hard to find some of the planets which only rise a little over the horizon, as a lot of the time I just cannot see them. But on Friday 1st June I actually managed to get my first sighting of Jupiter.

Using my K9 lens I could just make out the markings and bandings across the planet, I also tried then using my 2x barlow lens with it, but I could not make out much more detail. I think my next pruchase will have to be a good quality barlow lens and a 4x or 5x lens to try and improve my night viewings.

Anyway, I was also amazed to make out three stars in a horizontal line around Jupiter, after looking this up in the Collins Skywatching Book (ISBN 0002200287) they are in fact the Galilean Moons of Jupiter, of which there are actually four moons, but sometimes you cannot make out all four moons as one may be in front of Jupiter.