SJAA Ephemeris September 2000 | SJAA Home | Contents | Previous | Next

Shallow Sky

Watch a Triple Transit on Jupiter

Akkana Peck

Jupiter and Saturn rise almost together in late evening, and should be a lovely naked-eye sight surrounded by the nearby clusters of the Hyades and Pleiades in Taurus. More importantly, they're now rising early enough for evening observers to start getting a good telescopic look at them. Saturn's rings are still tilted wide, and Jupiter offers its Great Red Spot (rumor has it that it's darkening - what do you see?) and a never-ending dance of moons and moon shadows. Wednesday, September 6, if you're still awake at about 12:35 a.m., look for a triple transit on Jupiter: Io and its shadow, plus Europa's shadow. If you have a java-enabled web browser, you can check my applet at for other Jovian moon events.

Venus is visible low in the evening sky all month. Its phase is waning gibbous. If you missed the conjunction of the one-day moon with Venus last month, you can get another look at the lovely sight of a (slightly older) crescent moon near Venus on September 29.

Late in the month, Mercury, also waning gibbous, joins Venus in the evening twilight sky.

Uranus, Neptune, and Pluto continue to be observable in the early to mid evening.

Mars moves into the predawn sky this month. The red planet is at its dimmest, at magnitude +1.8, so won't put on much of a show until later this winter.

Mail to: Akkana Peck
Copyright © 2000 San Jose Astronomical Association
Last updated: July 19, 2007

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