|
Scott
Well done on the observation! Jupiter at current count has 67 known natural moons, however only 4 would be visible using amateur gear. The 5th largest moon is Himalia which is only 170km in diameter and has an apparent magnitude of 14.6. Theoretically possible with a large dob, but it is alose to the planet so very hard to see. Most likely beyond the 4 Galilean moons what you saw were stars in the vicinity.
What you are seeing with the barlow is quite normal. As you increase the power, you are also magnifying any turbulence in the atmosphere that degrades the image. This is most noticeable with bright objects such as planets. I would suggest the 10mm and barlow combo may be pushing your scope to its limits.
Having said that, still give it a look from time to time, you may strik one of those rare still nights when it does give a great view.
Malcolm
|