I decided the best way to proceed with recording my observations of the moon was to make a special observing log just for the moon, and organise it according to the days of the month. This way I can keep a track of exactly what’s visible when. Before I carry on, I just wondered if anyone would like to suggest a few more features to try and find. More specifically, what’s the best example of a ghost crater and lava dome?
(Day one is new moon)
Day 8 – exactly on first quarter
Got a good view of the Alpine Valley (the largest valley on the moon). It was quite close to the terminator and appeared as a dark wide line. Cloud prevented any more observations.
Day 9 – one day after first quarter
I have decided this is probably the best day of the month to view the moon. Moving from top to bottom, I got a good view of the Alpine Valley. Also a good view of Montes Apenninus, one of the best mountain ranges on the moon – the line of mountains ended just short of the terminator. Further down, the Straight wall (the largest fault line) was as clear as the nose on your face. Decided that 250x magnification definitely showed more detail than 155. The Alpine Valley has a serrated edge on the side furthest away from the terminator.
Day 10 Found the Straight Wall. It’s in the middle of a ghost crater, but it’s barely visible.
Day 11 Observing the moon with Harry. I couldn’t see the straight wall.
I found two lava domes, Gamma and Delta, near the crater Gruithuisen. (Just a little down from the Bay of Rainbows.) The 13mm eyepiece worked well, but the 8mm was even better, so maybe about 200x is best for these small features on the moon. Close by I also found a lava channel on the Aristarchus Plateau. It was white with a few sharp turns. I’m not sure if this is classed as a sinuous rille.
Can’t find the Cordillera Mountains, so this will not go on the list of good objects to find.
3 days after full moon and 3 days before first quarter
Found the alpine Valley, just above and to the right of the Sea of Rains. It’s in the middle of a narrow triangle formed by three prominent craters – Plato, Mitchell and Eudoxus. Even though the terminator was a considerable distance away, it was still visible, but only just. Must try when the terminator is closer for a better view.