Midnight, hauled 10″ dob to roof. Jupiter very bright, so was the moon, so I set up in the shadow of the Elevator Shed. 83 power brought out the disk and bands on Jupiter. 166 power and I could see some texture in the bands. Some minor flaring at 166 power, so I tried 332. Major flaring around Jupiter: it just would not quite focus, but I deluded myself I could see some detail. So finally, I tried the 2x barlow and the 4x barlow with the 15mm eyepiece for 664 power. Jupiter was really really big, if you didn’t mind the chromosphere. Settled back to 166, and just could not see too much. Swung the scope to the zenith, and had around fifty stars in each field (around one degree) at 83 power. Epsilon Lyrae, the double double I could split once, but not twice. (I’ve done it with f/15 maksutov) f/5 newtonian might be able to do it, but not from a roof in Manhattan.
Jupiter, etc. Leave a comment