Sky & Telescope - August 2022 - 46

AUGUST 2022 OBSERVING
Sun, Moon & Planets by Gary Seronik
To find out what's
visible in the sky from
your location, go to
skyandtelescope.org.
A " Double Transit " Night
Saturn reaches opposition as the Moon turns full.
WEDNESDAY, AUGUST 3
As the Moon makes its monthly journey
eastward along the ecliptic, it passes by
a handful of bright stars, and one of
the brightest is 1st-magnitude Spica,
in Virgo. Indeed, only Aldebaran, in
Taurus, outshines it - and only by 0.1
magnitude. However, Spica is offset just
2° below that solar system superhighway
known as the ecliptic, compared
with 5½° for the Taurus luminary.
This evening the waxing lunar
crescent is positioned 3° above Spica.
This pairing is notable because it's the
best one remaining in this year's dusk
series. The twosome combines once
again on the 30th, but on that occasion
they'll be farther apart (4½°) and
closer to the horizon. By the time the
Moon revisits Spica in late September,
the star will be just 20° from the
Sun and lost in twilight's glare. You'll
have to wait until November to see the
Moon and Spica together again when
the star re-emerges at dawn.
THURSDAY, AUGUST 11
Tonight, we get a " double opposition. "
Sort of. Opposition occurs when a solar
system body lies opposite the Sun's position
in our sky. That happens (usually)
once a month with the Moon, when it's
full. With the outer planets, opposition
typically occurs once a year. This
These scenes are drawn for near the middle
of North America (latitude 40° north, longitude
90° west). European observers should move
each Moon symbol a quarter of the way toward
the one for the previous date; in the Far East,
move the Moon halfway. The blue 10° scale bar
is about the width of your fist at arm's length.
For clarity, the Moon is shown three times its
actual apparent size.
46
AUGUST 2022 * SKY & TELESCOPE
year, Saturn reaches that milestone on
August 14th, while this month's full
Moon occurs late on the 11th - the two
oppositions are separated by roughly 64
hours. You might expect that when two
objects are opposite the Sun at the same
time they'll be found in roughly the
same region of sky - and you'd be right!
This evening +0.3-magnitude Saturn
and the gloriously bright full Moon rise
above the east-southeastern horizon in
fading twilight, with just 5° separating
them. As they arc across the sky, and
the night of the 11th transitions into
the morning of the 12th, the separation
between the pair gradually diminishes
until they're only 4° apart at around
4:30 a.m. EDT.
MONDAY, AUGUST 15
This morning the waning gibbous
Moon sits only about 2° below left
Dawn, Aug 12-13
45 minutes before sunrise
of brilliant Jupiter. It'll be a splendid
naked-eye sight, but I encourage you
to have your binoculars ready anyway.
Thanks to the Moon's proximity to
the -2.8-magnitude planet, you have
a chance to see how late into twilight
you can continue to hold Jupiter in view
- first with your eyes alone, then with
your binos. The Moon provides a handy
signpost as twilight brightens and sunrise
draws near.
I've observed Jupiter in a telescope in
full daylight several times (with some
careful hunting), but I don't recall ever
seeing it in binoculars when the Sun
is up. How about you? Jupiter and the
Moon will be at their very closest at
around 9 a.m. EDT, when they'll be
slightly more than 1½° (three Moon
diameters) apart. By then, it'll be daylight
along the East Coast, but twilight
will still be underway out West.
Dawn, Aug 14 -16
1 hour before sunrise
Moon
Aug 16
AQUARIUS
Moon
Aug 13
Jupiter
Moon
Aug 15
10°
Moon
Aug 12
CAPRICORNUS
Looking West-Southwest
Saturn
CETUS
Moon
Aug 14
Looking Southwest,
halfway up
PISCES
http://www.skyandtelescope.org

Sky & Telescope - August 2022

Table of Contents for the Digital Edition of Sky & Telescope - August 2022

Contents
Sky & Telescope - August 2022 - Cover1
Sky & Telescope - August 2022 - Cover2
Sky & Telescope - August 2022 - 1
Sky & Telescope - August 2022 - Contents
Sky & Telescope - August 2022 - 3
Sky & Telescope - August 2022 - 4
Sky & Telescope - August 2022 - 5
Sky & Telescope - August 2022 - 6
Sky & Telescope - August 2022 - 7
Sky & Telescope - August 2022 - 8
Sky & Telescope - August 2022 - 9
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Sky & Telescope - August 2022 - 12
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