interesting Lorien....
I took a friend up to the observatory with me last night, and we also saw one..
Strangley.... it did not differ much from your illustration.
I also got it in the telescope and saw 4 seperate lights on it.
I did have my camera, But have learned over the years...
If its not close, and large enough to make out an actual structure..
theres really no point in trying to get a pic imho. lol