Galilean Satellites

[astroavani]

Extrapolating Resolution Limits
Photos made as an experiment because it is known that to achieve something useful in the satellites of Jupiter the seeing should be very good and with little humidity in the air, which was not exactly the case in this capture, although seeing is in the range of 4 / 5 the relative humidity was around 79%.
Even so it is possible with willpower to see some spots of albedo in Ganymede and Callisto.
It struck me that it had gone well round, which is not usual, in compensation Callisto came out quite oval like Europe.
In a photo of these it is possible to observe the limits of resolution by which we are planetary astrophotographers since the disc of Europe for example, shows itself with less than 1 second of arc.
In short, a little shocking photo, but that probably will be admired by those who like me, dedicate themselves to this type of astrophotography and know that such a record is quite difficult to obtain.
Http://astroavani.no.comunidades.net/satelites-galileanos

[Ben the Ignorant]

Wow! Have you tried Ceres?

[laudropb]

Very nice captures Avani.

[astroavani]

No, I never tried Ceres, my friend Ben!

The fact that Callisto has become oval, must have been caused by a crater with albedo very high there in the pole, if it is known that Callisto is very dark. This difference of albedo in a disk of about 1 seg of arc must have caused this dispersion and ovalado the satellite that should be round in the photo, see the photo of the Winjupos that shows the same position:

[Ruud]

Hi Avani, I suppose you actually got that crater in your image of Callisto. Isn't that amazing?

[Pete Presland]

A very impressive set of images Avani, how far we have come in solar system imaging.

[Owmuchonomy]

Very impressive to see the discs.  I wondered why Callisto matched Ganymede for size in your images and you explained it well.  On my wish list is to capture Io via my filter grating SA100.  Supposedly it is possible to catch the Sulphur (volcano) lines in the spectrum? At Mag 6 I am hopeful of something.  The issue will be calibration but I can do it based on the known dispersion.

[astroavani]

 Ganymede the Spots also hit, a light zone underneath and a dark spot on the right. 

[astroavani]

My friend Andres de La Plaza made a composition with crop of the images of Ganymede and Callisto with the images of the WinJupos, and later "blur" and regulation "brightness and saturation". I think it hit right!

[Dave In Vermont]

Fascinating stuff, Avani. To my knowledge, these are the first recorded images of "Moon-Gazing" at another planet's Moons - done from Earth.

Wild stuff!

Dave