Venus 2017

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Re: Venus 2017

Postby Aratus » Tue May 23, 2017 1:31 pm

Venus continues to diminish in size as its phase approaches 'half'. Just 43% at the moment, and only 27 arc secs across. Photo taken at 0846 on 23rd May
Image
Last edited by Aratus on Wed Jul 26, 2017 6:28 pm, edited 1 time in total.
I use an 11" Celestron SCT (CPC 1100) on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI1600MC and Canon 500D for imaging.
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Re: Venus 2017

Postby Aratus » Fri May 26, 2017 7:09 pm

To the same scale, and time of day, the planet Mercury.

Image

It shows just how small Mercury is, and how difficult it is to observe in daylight.
Last edited by Aratus on Wed Aug 02, 2017 1:10 pm, edited 1 time in total.
I use an 11" Celestron SCT (CPC 1100) on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI1600MC and Canon 500D for imaging.
Aratus
 
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Location: East Lincolnshire

Re: Venus 2017

Postby andrewscomputers » Fri May 26, 2017 7:21 pm

Hi Aratus I didn't realise that Mercury is quite small and I did manage to get the sunspot on the sun today after trying to get my goto to go in the right place as it did not want to work properly,so had to do manually.
Thanks
Andy
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Re: Venus 2017

Postby Aratus » Sat May 27, 2017 2:15 pm

Currently Mercury is 7 arcsecs across, and Venus 26 arcsecs. The only success I've had imaging Mercury is to use a x4 barlow. Mercury needs to be high in the twilight sky to get a good contrast.

I did partially align on the sun to 'goto' Mercury. There was only only 1 faint spot as far as I could see.

I did image Venus on the 26th as well, but it isn't much different.

Image

On 3rd June, Venus will have a phase of 50%, but it often surprises us!
Last edited by Aratus on Wed Aug 02, 2017 1:13 pm, edited 2 times in total.
I use an 11" Celestron SCT (CPC 1100) on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI1600MC and Canon 500D for imaging.
Aratus
 
Posts: 838
Joined: Tue Jan 12, 2016 2:17 pm
Location: East Lincolnshire

Re: Venus 2017

Postby Aratus » Sat Jun 03, 2017 2:02 pm

The 3rd June has come around, and Venus has reached what is termed its 'greatest western elongation'. In other words it is as far from the sun in the sky as it is going to get. (nearly 46 degrees) From our position half of Venus is now lit by the sun. Rather amazingly there was enough clear sky to observe it this morning.
Image

Venus is now only 24 arcsecs across. From now on Venus swings around to the other side of the sun, getting further away from us. I normally lose interest in Venus after this, but I'll continue to observe for the rest of the year for as long as I can.
Last edited by Aratus on Wed Jul 26, 2017 6:11 pm, edited 1 time in total.
I use an 11" Celestron SCT (CPC 1100) on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI1600MC and Canon 500D for imaging.
Aratus
 
Posts: 838
Joined: Tue Jan 12, 2016 2:17 pm
Location: East Lincolnshire

Re: Venus 2017

Postby Aratus » Thu Jun 15, 2017 11:04 am

Venus on 15th June. Now around 56% phase. 21 arcsecs across.

Image
Last edited by Aratus on Wed Jul 26, 2017 6:26 pm, edited 1 time in total.
I use an 11" Celestron SCT (CPC 1100) on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI1600MC and Canon 500D for imaging.
Aratus
 
Posts: 838
Joined: Tue Jan 12, 2016 2:17 pm
Location: East Lincolnshire

Re: Venus 2017

Postby andrewscomputers » Fri Jun 16, 2017 3:39 pm

Hi Aratus I like the image,I saw Venus at 4am the other morning and it it seems still to be bright in the sky.
Thanks
Andy
andrewscomputers
 
Posts: 189
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Re: Venus 2017

Postby Aratus » Fri Jun 16, 2017 8:36 pm

Although the image is getting smaller, the phase is getting larger, and the net result is that it is getting brighter. If you know where to look, it is visible throughout the morning and well away from the sun. Of course it is much easier to located before the sun rises, and much more spectacular! Although I have often tried to get up early to do some observing, I very rarely manage it. :cry:
I use an 11" Celestron SCT (CPC 1100) on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI1600MC and Canon 500D for imaging.
Aratus
 
Posts: 838
Joined: Tue Jan 12, 2016 2:17 pm
Location: East Lincolnshire

Re: Venus 2017

Postby Aratus » Mon Jun 26, 2017 10:38 am

26th June: A nice fresh morning gave particularly good seeing.
19 arcsecs across and a 61% phase.

Image

All of these photos are the same scale, so the sizes can be directly compared.
Last edited by Aratus on Wed Aug 02, 2017 1:07 pm, edited 1 time in total.
I use an 11" Celestron SCT (CPC 1100) on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI1600MC and Canon 500D for imaging.
Aratus
 
Posts: 838
Joined: Tue Jan 12, 2016 2:17 pm
Location: East Lincolnshire

Re: Venus 2017

Postby Aratus » Sat Jul 08, 2017 11:12 am

8th July: Venus is now down to 17 arc seconds in diameter. The phase is 66% It was still visible in the daytime sky, but not as bright as it has been. The smaller size makes taking a sharp image very difficult as the effect of an unsteady atmosphere seems more promounced on an image of this size. Also there was quite a lot of cloud, which reduced the number of images I could take for stacking.

Image

Edit: Thanks to Photobucket's 'ransom demand' for '$99/month, or we will stop your images being shown on forums', I'm going to have to go through every post and change the links to a new hosting site. :evil:
I use an 11" Celestron SCT (CPC 1100) on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI1600MC and Canon 500D for imaging.
Aratus
 
Posts: 838
Joined: Tue Jan 12, 2016 2:17 pm
Location: East Lincolnshire

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