We'll be out a little later tonight. Sunset isn't until 8 p.m. so
that's when we'll start observing at our usual Myrtle and Lime
corner in Monrovia CA. The moon is a few days from first quarter, so
will appear as a chonky crescent tonight. We've just about lost
views of Mars this apparition, you might glimpse it near the western
horizon with unaided eye after sunset, but it will be too low to aim
a telescope at from our corner.
Jupiter is beginning its months-long reign as King of the planets in
the night sky sky this month. Despite all the hype about Jupiter's
brightness and closest approach (opposition) to the Earth in its
orbit this week, this isn't the easiest time to view the planet
early in the evening. Just like the full moon phase, Jupiter
Opposition means Jupiter is "opposite" the sun, rising sunset
*opposite* the sun and setting near sunrise. At 8 p.m. sunset
tonight, Jupiter will only be a few degrees above the eastern
horizon. It may clear the trees in Monrovia by 10 p.m. tonight but
will be best to see around midnight for the next few weeks, when it
reaches its highest altitude, which is only 30 degrees above the
horizon. Each week it will reach this highest point a half hour
earlier, so July and August will be prime viewing months.
So tonight's view, when Jupiter will be lower in the sky won't
provide awesome views. For awesomness, set your alarm, step outside
between midnight and dawn over the next few months. With some
moderate-sized binoculars and a steady view (use a fence or post to
steady/balance the binos) aim at Jupiter and you should be able to
see the Galilean moons! Hope to see some of you tonight! Jane
Jane Houston Jones
http://www.otastro.org/