Contains:  Solar system body or event
Jupiter's moons 2020-07-04: now you see them, now you don't, 



    
        

            Darren (DMach)

Jupiter's moons 2020-07-04: now you see them, now you don't

Acquisition type: Lucky imaging

Technical card

Imaging telescopes or lenses: Celestron C11 XLT

Imaging cameras: ZWO ASI290MC

Mounts: CEM60

Software: AutoStakkert! 3  ·  Astra Image Company Astra Image PLUS  ·  Registax 6  ·  Photoshop CC  ·  FireCapture 2.6

Filters: Astronomik UV-IR Block L-Filter T2

Accessory: ZWO Atmospheric Dispersion Corrector (ADC)  ·  TeleVue PowerMate 2" 2x  ·  Teleskop Service T2 Quick Changer and 360 Degree Rotator  ·  Baader SteelDrive II Focusing Motor  ·  Baader SteelTrack Focuser


Date: July 5, 2020

Time: 00:24

Frames: 3500

FPS: 80.00000

Focal length: 5600

Seeing: 3

Transparency: 8


Resolution: 811x705

Locations: Home, Singapore, Singapore

Data source: Backyard

Description

After 25 straight cloudy nights, it was great to finally see the stars and planets again the night of 4th July. Work has been insanely busy, though, so it has taken quite some time to get through the processing.

Seeing was a little challenging, particularly the slow seeing effects (extended periods of blurring). The good news with this kind of seeing is that you can grab some good data during those moments where the seeing settles. Total usable frames were a little down however, so the final images have a little more noise than ideal.

The results of this session are best expressed by the animation, which first shows Io emerging from behind the sunlight limb and then shows Europa disappearing into Jupiter's umbra. Now you see them, now you don't!

Each frame of the animation was created by de-rotating three individual stacks for Jupiter itself (to control the noise somewhat) and combining this with a single stack at the corresponding time point for the moons.

The still image shown in Rev A shows Europa mid-way through its transition into the umbra.

Thanks for looking!

Comments

Revisions

  • Jupiter's moons 2020-07-04: now you see them, now you don't, 



    
        

            Darren (DMach)
    Original
  • Final
    Jupiter's moons 2020-07-04: now you see them, now you don't, 



    
        

            Darren (DMach)
    B

B

Description: Animation

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Histogram

Jupiter's moons 2020-07-04: now you see them, now you don't, 



    
        

            Darren (DMach)