August 1 – 6, 2021: The morning moon wanes toward its New moon phase in the eastern sky. It passes the bright stars that are prominent in the evening sky during the winter season in the northern hemisphere. The stars have been making their first appearances in the morning sky during summer. At this hour, Procyon and bright Sirius are the last stellar duo to appear.
by Jeffrey L. Hunt
During August 1 – August 6, 2021, the waning moon appears in the eastern sky about an hour before sunrise. Each morning, notice its change from its previous morning’s place and moon phase.
Step outside each morning about an hour before sunrise. Here’s what to look for:
August 1: The thick crescent moon, 42% illuminated, is over halfway up in the sky in the east-southeast. The gibbous moon is nearly 13° to the right of the Pleiades star cluster – the Seven Sisters.
August 2: The crescent moon, 33% illuminated, is less than halfway up in the east. It is to the right of a line from the Pleiades star cluster to Aldebaran, the brightest star in Taurus.
August 3: This morning’s crescent moon, 24% illuminated, is 5.9° to the upper left of Aldebaran.
August 4: The waning moon, 16% illuminated, seems to be caught between the horns of Taurus – Elnath, “the one butting with horns,” and Zeta Tauri. The lunar slice is 4.9° to the lower right of Elnath and 3.0° to the upper left of Zeta. The two stars are too far apart for the moon and the stellar horns to fit into the same field of a binocular. The lunar crescent and Zeta Tauri make a nice site through the binocular.
August 5: In Gemini this morning, the thinning moon is 3.0° to the upper left of Tejat Posterior, “the heel,” and 3.2° to the upper right of Mebsuta, “the outstretched paw of the lion.” This morning all three celestial sights fit into a binocular field. Notice that Castor – one of the Gemini Twins – is 15.7° to the lower left of the moon.
August 6: The moon, 5% illuminated, is about 10° up in the east-northeast, 5.6° to the upper right of Pollux, the second Gemini Twin.
With the sunrise time becoming noticeably earlier, viewing the morning and evening sky is easier than mornings and evenings near the solstice. As the midpoint of summer approaches, note the bright stars in the morning sky and the waning crescent moon as it heads toward the sunrise point during these six mornings.
Articles and Summaries
November 6, 2021: The midpoint of Autumn occurs today.
November 3, 2021: Before sunrise speedy planet Mercury, the crescent moon, and the star Spica are grouped together. The trio does not appear this close together again until 2033.
October 31, 2021: There is no Halloween Full moon this year, and the phase is not close. The crescent moon is in the morning sky. Mercury is low in the east-southeast before sunrise. The planet pack – Venus, Saturn, and Jupiter – gleam in the evening sky.
October 29, 2021: Venus reaches its greatest elongation from the sun. It is in the evening sky with Jupiter and Saturn. The crescent moon and Mercury are in the eastern sky before sunrise.
October 29 – November 1, 2021: The crescent moon moves in front of the stars of Leo in the eastern sky before sunrise. Watch the moon appear lower and the phase shrink (wane) each morning. Also note that there is no Full moon on Halloween this year!