Jupiter's Moons 2h 30m 2h 40m +8° 2h 20m Sept 1 2 3 EAST WEST 4 864 +6° i 5 Io 6 7 8 9 +4° a 11 Sept 1 CETUS Europa 10 12 4 13 8 Path of Me lpo me ne +2° 12 1073 16 1055 b Sept 1 8 16 M77 16 17 69 Oct 1 18 0° Callisto 70 75 21 936 22 28 Star magnitudes 19 20 24 4 5 6 7 8 9 Ganymede 15 Pa 24 th of Cer es 20 14 -2° Oct 1 23 24 k 25 Mira 26 27 -4° 28 29 30 Oct 1 Two big asteroids for small scopes, 1 Ceres and 18 Melpomene, fit in the same low-power view near the head of Cetus for a few nights around September 7th and 8th. They'll be 0.8°° apart those nights, with Ceres magnitude 8.2 and Melpomene 8.8. They remain within 1° of each other from September 5th through 10th, well up in the east after about 1 a.m. By September's end, when they're farther apart, they'll be a half magnitude brighter and well up by 11 or midnight. The wavy lines represent Jupiter's four big satellites. The central vertical band is Jupiter itself. Each gray or black horizontal band is one day, from 0 h (upper edge of band) to 24h UT (GMT). UT dates are at left. Slide a paper's edge down to your date and time, and read across to see the satellites' positions east or west of Jupiter.