Izar and 34 Bootis

2 months 1 week ago - 2 months 1 week ago #108467 by Until_then-Goodnight!
Izar and 34 Bootis was created by Until_then-Goodnight!
Hello all,

Last night was another clear night, although I felt the seeing and transparency were better last Thursday 19 March.

I attempted to split Izar last night, but unfortunately I failed to. I tried at 50X, 100X, 133X, and 200X, but no joy. Unlike the my last session, I was definitely observing Izar, so, maybe it was the scope??? Or could it have been the light pollution??? Then again, it may have been my  inexperience splitting stars.

While I was somewhat disappointed because I had planned to sketch the double star, I took the opportunity to sketch Izar and 34 Bootis. Both stars looked very nice in my eyepiece, and I'll certainly try to split Izar on another occasion.

In terms of the sketch, I added in the diffraction spikes on Izar digitally. Thankfully, it was much easier this time round - learning curve and all that - and I managed to even find the time to enhance the diffraction ring surrounding Izar.

So, even though I failed to split Izar last night it was still an enjoyable session.

Other details from last night's sketching session include:

Objects: Izar and 34 Bootis
Date: 22/03/2020
Location: Dundrum - Bortle 8
Time: 23:18 UT
Seeing: 5pk
Transparency 3
Instrument used: f/8 150mm Newtonian Reflector
Eyepiece: 32mm Plossl
AFOV: 52°
TFOV: 1.39°

Materials used: 2B, 2H graphite pencils. The image was sketched at the eyepiece and inverted using GIMP 2.0

As always many thanks for taking the time to read the above, and your comments and feedback are always welcomed.



Stay safe and clear skies to all,

Darren.

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2 months 1 week ago #108474 by flt158
Replied by flt158 on topic Izar and 34 Bootis
I'm sorry you are having trouble splitting Izar, Darren.

You might just check your collimation of your Newtonian mirror.
This can be easily done out in the garden during the daytime.
Or indoors if you have room.

You may check your mirror if it needs to be cleaned.
But I do doubt that could be a problem.
I know you keep your eyepieces clean.
So you probably keep your mirror clean too.

Clear skies,

Aubrey.
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2 months 1 week ago #108477 by Until_then-Goodnight!
Replied by Until_then-Goodnight! on topic Izar and 34 Bootis
Hi Aubrey, 

Many thanks for your message. I don't believe it is the collimation as I always collimate the mirror with a laser before each session. It might be the mirror though. While I frequently clean my eyepieces (only three days ago was the last time), I've yet to clean the primary mirror in the scope since I purchased it in June 2018. I suppose I'm somewhat nervous about taking the scope apart, and having to reassemble it. However, I feel the primary will need a clean sooner rather than later. So, I might attempt to clean it during this 'lock down', or whatever name we're putting on it. 

So, if anyone here has some good advice on how to clean the primary mirror on a small Dob (6 inches) I'm all ears.

Clear skies to all, 

Darren. 
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2 months 1 week ago #108480 by flt158
Replied by flt158 on topic Izar and 34 Bootis
Hi Darren.
It has been a number of years since I cleaned a Newtonian mirror. But I used to clean my own once a year. I had a 6" first. Then an 8.75" mirror in later years.

I can give you this summary.

Put a good amount of warm water in the kitchen basin.
Submerge the mirror in it and leave it for 5 minutes. Others can correct me on that one. Some dust will rise from the mirror's surface.
Raise the mirror at about 45 degrees angle.
Get good chunks of cotton wool and soak them in soap.
Rub the mirror down with these with vertical strokes.
Your mirror will be clean then.
Put the mirror out of the water to one side.
Leave it for another 5 minutes.
Get a completely clean handkerchief and very gently dry the whole mirror.
Then put the mirror back into your tube.
Check your collimation once again.
You're ready to go!

Now please everyone, if I have left anything out, do NOT hesitate to give your opinions.

Clear skies,

Aubrey.
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2 months 1 week ago #108482 by Until_then-Goodnight!
Replied by Until_then-Goodnight! on topic Izar and 34 Bootis
This is so helpful Aubrey... Thank you very much!

I did not know you had a 6 inch (and 8.75) Newtonian Reflector in the past... I suppose I'll always associate you with your fine William Optics 158mm Apo. 

Thanks again, 

Darren. 
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2 months 1 week ago #108483 by flt158
Replied by flt158 on topic Izar and 34 Bootis
You might consider wearing kitchen gloves while you are at work at the sink, Darren.

Happy cleaning,

Aubrey.
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1 month 3 weeks ago #108617 by Until_then-Goodnight!
Replied by Until_then-Goodnight! on topic Izar and 34 Bootis
Hi Aubrey,

Just a quick message to say a big 'thank you' for the instructions you provided on mirror cleaning. I decided to clean the primary today and I'm very happy with the results. To give you an idea I've attached a before and after photo.

Now I just a clear sky to see the benefit.

Darren.

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1 month 3 weeks ago #108620 by flt158
Replied by flt158 on topic Izar and 34 Bootis
Wow!
What a special moment this is for you, Darren.
Let's have the clear skies again soon.

Congratulations on achieving a first class job.

Happy Easter to you and yours from Aubrey.
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1 month 3 weeks ago #108623 by Until_then-Goodnight!
Replied by Until_then-Goodnight! on topic Izar and 34 Bootis
Thanks Aubrey, 

It was nerving-wracking at times, particularly when putting the mirror back into the tube. It needed a little bit of encouragement, but thankfully I managed to get it done without damaging the primary.

I hope you and your loved ones have a lovely Easter too.

Darren.
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1 month 3 weeks ago #108626 by flt158
Replied by flt158 on topic Izar and 34 Bootis
I am discovering my William Optics 70 mm F/6 small apo needs a good clean too, Darren.
I'm thinking of doing it tonight Good Friday.
Thankfully I will not have to remove the lens from its tube.
I'll probably do the same job on the main lens while I'm at it.

www.met.ie are promising clear skies for Easter Sunday night.
Rain is supposed to be coming during the daytime hours.

Aubrey.
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1 month 3 weeks ago #108633 by Until_then-Goodnight!
Replied by Until_then-Goodnight! on topic Izar and 34 Bootis
Hi Aubrey,

If you did clean the lens on your refractor tonight, I hope it went well. Apart of having to remove a mirror with a reflector, is there much difference when cleaning a refractor?

Fingers crossed for Sunday!

All the best,

Darren.
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1 month 3 weeks ago - 1 month 3 weeks ago #108640 by flt158
Replied by flt158 on topic Izar and 34 Bootis
Hi Darren.
I am planning on cleaning my lenses right now on Saturday afternoon. 
Recently I had discovered a very old film called "The Gospel according to St. Matthew" was put on You Tube complete with English subtitles. The film was made back in 1964 by an Italian director Pier Paolo Pasolini. So Valerie and I watched it instead. I would recommend it to anyone. All the actors and actresses were and are amateurs. It last 2 hour 10 minutes. Thankfully it was a cloudy night over Dublin.
Anyway I have cleaned my lenses many times since I bought it in 2009. No cotton wool is required. There is a very special spray which needs to be used. I will inform you of its name later.
But it is not to be used on reflectors at all. 

I can't wait to "savage" my Easter egg on Easter Sunday. 

Clear skies from Aubrey.
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1 month 3 weeks ago - 1 month 3 weeks ago #108641 by flt158
Replied by flt158 on topic Izar and 34 Bootis
Happy Days, Darren.

Both my lenses are now clean.
The name of the cleaning spray is Optical Wonder which is manufactured by Baader Planetarium.
But it must be only used on lenses on refractors and SCT's. 

Clear skies,

Aubrey.
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1 month 3 weeks ago #108643 by Until_then-Goodnight!
Replied by Until_then-Goodnight! on topic Izar and 34 Bootis
Hi Aubrey, 

Many thanks for your messages. Biblical films were always played at Easter growing up, and I have to keep the tradition going. I had not heard of the film you and your wife watched last night, so thanks for mentioning it. 

The sky ended up being OK tonight. I didn't take the scope out though, saving it for tomorrow evening. Looking forward to seeing how the mirror performs. 

And we'll done on doing your own spring clean on your William Optics 70mm. Also thanks for providing those details... I'll be sure to take a wide berth if I see a bottle of Opital Wonder!

Enjoy your egg, and Have a great Easter Day. 

Darren. 
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