Still too hot. Went to Chelan for lunch. Put small A/C in bedroom. (re)Learning astrometric trigonometry and working on my martian time calculations again. Want to get them /right/, for sure and for certain, then turn them into libraries I can use in several languages, so I can write watches for Pebble and Wear, as well as other things. It's ... complicated, especially if you never really learned orbital mechanics terminology and you're trying to get your information from a pair of short jargon-rich papers.