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Small bore challenge: Venus w/ 6" or less

astrophotography planet
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#76 james7ca

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Posted 28 May 2018 - 11:33 PM

Darin, thanks for opening the new season and nice work as usual.



#77 Stargazer3236

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Posted 29 May 2018 - 12:59 PM

rehling, what did you use to capture the image. Was it firecapture or SharpCap? What post processing did you use?

 

Darin, I might ask you the same thing. 

 

Thank you.



#78 evan9162

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Posted 29 May 2018 - 01:36 PM

Pretty sure I used FireCapture.  



#79 rehling

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Posted 01 June 2018 - 09:39 PM

Stargazer, I'm on a Mac and used oacapture. With different releases, I've had some of the functionality behave for me or not, but that usually concerned deep sky objects, not planets.



#80 evan9162

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Posted 02 June 2018 - 03:38 PM

Seeing was pretty decent right around sunset last night.  Same setup as before

 

Venus_UV_VX6L_2x_sharp.jpg


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#81 rehling

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Posted 03 June 2018 - 02:04 PM

I got a similar pattern but much less clear. I need to process it a bit more. But more important, I think I need to keep my telescope in shade until sunset, then put it back on the mount.



#82 evan9162

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Posted 03 June 2018 - 04:17 PM

More decent seeing last night.

 

Venus_UV_VX6L_2x_sharp.jpg


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#83 evan9162

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Posted 09 June 2018 - 07:02 PM

Seeing not so great last night

 

Venus_UV_VX6L_2x_sharp.jpg


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#84 Stargazer3236

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Posted 10 June 2018 - 03:45 PM

Seeing not so great last night

 

attachicon.gif Venus_UV_VX6L_2x_sharp.jpg

I tried to image Venus last night with a Uvenus filter. But my results were less than perfect. I used a 2X barlow, ZWO ADC and my ASI290MM with the UVenus filter and I could not get a bright enough image.

 

What capture software are you using? SharpCap?



#85 evan9162

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Posted 10 June 2018 - 04:36 PM

FireCapture.  

 

Which scope are you using?  I don't bother with an ADC, since the band pass of the UVenus filter isn't very wide.  There won't be very much dispersion across that band.  The ADC just reduces throughput, and may introduce aberrations in UV.

 

Look at my previous images where I was using the ASI290mm.  With an F/8 scope and 2x barlow, I was operating at around F/16.  You should be able to use similar settings if you are working at a similar F/ratio.  The image is pretty dim (30% in the histogram).  

 

Seeing is even more critical in UV than other bands, since the atmosphere scatters shorter wavelengths more.



#86 evan9162

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Posted 11 June 2018 - 11:59 PM

Good seeing tonight, and some neat cloud features.  Some subtle arcs, and an equatorial "hammerhead" feature.  

 

Venus_UV_VX6L_2x_sharp.jpg


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#87 evan9162

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Posted 20 June 2018 - 01:08 AM

Seeing wasn't too great tonight.  Venus is right around maximum altitude around sunset right now (around 35* above the horizon, give or take), but doesn't hit maximum elongation until mid-August, at which point it's getting low in the sky.  This is probably the best time to image Venus this year.

 

Venus_UV_VX6L_2x_sharp.jpg


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#88 evan9162

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Posted 25 June 2018 - 12:03 AM

Added a bit of color last night.

 

Venus_UV_Color_VX6L_2x_sharp.jpg


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#89 evan9162

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Posted 27 June 2018 - 01:27 AM

Two nights ago

 

Venus_UV_VX6L_2x_sharp.jpg


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#90 evan9162

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Posted 27 June 2018 - 01:29 AM

And tonight.  Very subtle features without a lot of contrast...

 

Venus_UV_VX6L_2x_sharp.jpg


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#91 Ed D

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Posted 27 June 2018 - 05:03 AM

Recently I began imaging with IR Pass filters.  I have the ZWO 850nm and Optolong 685nm.  I'm learning how to image with these and having lots of fun.  This Venus was done using the 850nm filter.

 

Ed D

 

Venus 2018-06-16.jpg

 

Subject: Venus
Date: 06/16/2018
Time: 21:00hr DST (06/17/2018 01:00 UT)
Location: Miami, Florida 25.61N 80.42W
Conditions: Not good, heavy haze and moisture.
Instrument: TV-85
Camera: ZWO ASI290MC
Filter: ZWO 850nm
Focal Length: f/21
Capture Image Size: 1936x1096
Frames: 33sec Video
Capture Software: SharpCap 2.9

Notes:
- Conditions not favorable, image shimmering.
- Very large and heavy haze visible around moon.
- Stacked using 20% frames.
- Mild sharpening and gamma.
- Attempts with 685nm and #47 Wratten results
  questionable.

 


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#92 evan9162

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Posted 28 June 2018 - 09:24 PM

Nice.  I've never gotten details with a 685nm or 850nm filter.



#93 evan9162

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Posted 28 June 2018 - 09:25 PM

Last night's edition...

 

Venus_UV_VX6L_2x_sharp.jpg



#94 evan9162

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Posted 01 July 2018 - 08:05 AM

Venus_UV_VX6L_2x_sharp.jpg



#95 evan9162

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Posted 02 July 2018 - 05:46 PM

A period of very good seeing from 9-9:30pm resulted in some good detail.  

 

Venus_UV_VX6L_2x_sharp.jpg


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#96 Tavi F.

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Posted 10 July 2018 - 05:17 PM

Venus from 5th of July 2018. In visible light. The seeing was not so friendly on this target, but with his smaller angular size, much brighter than other planets and around 15000 frames captured, I was able to stacked 1100 frames... enough to make some atmospheric colors visible.

 

42425824515_38ff682c25_o.jpg


Edited by Tavi F., 10 July 2018 - 05:19 PM.

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#97 evan9162

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Posted 12 July 2018 - 09:53 PM

I figured with the hot weather, heat plumes everywhere, and Venus sinking farther down in the sky, I was pretty much done for this year.

 

On a whim, I set things up at about 7pm tonight. Seeing was mediocre, but better than it has been all week at my usual imaging time (8-9pm). I went ahead and started a capture, then putted around with a few chores, checking in on occasion.

 

At about 7:30, I checked in on it, and behold, the skies had calmed down a LOT. By 7:40 Venus (mind you, this is in UV, so much more susceptible to unsteady air) was nearly rock steady. I let the capture run until nearly 8pm, when it stared to rock and roll again. The entire capture was over 35 minutes and 134,000 frames, but I only used the last 40,000 frames to choose the best 20% (and they were a good 20%!).

 

So here is a really excellent Venus. Probably not my best this year (I think the capture with the "hammerhead" feature is still the best so far), but definitely #2.

 

Venus_UV_VX6L_2x_sharp.jpg


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#98 evan9162

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Posted 17 July 2018 - 09:23 PM

As Venus dips down lower in the sky, I have to shoot earlier in the evening.  Caught few steady moments here and there.

 

Venus_UV_VX6L_2x_sharp.jpg


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#99 netwolf

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Posted 27 July 2018 - 02:59 AM

Evan in awe of your work, just fantastic detail. 

 

whats the max capture time for Venus? I mean to avoid rotation impact.



#100 evan9162

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Posted 27 July 2018 - 09:58 AM

20-30 minutes




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